/*******************************************************************************
 * Copyright (c) 2009, 2010 Oracle. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0, which accompanies this distribution
 * and is available at http://www.eclipse.org/legal/epl-v10.html.
 *
 * Contributors:
 *     Oracle - initial API and implementation
 ******************************************************************************/
package org.eclipse.jpt.jpa.ui.internal.preferences;

import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.resources.IWorkspaceRunnable;
import org.eclipse.core.resources.IncrementalProjectBuilder;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.preferences.IEclipsePreferences;
import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jdt.internal.ui.preferences.PropertyAndPreferencePage;
import org.eclipse.jdt.internal.ui.preferences.ScrolledPageContent;
import org.eclipse.jface.dialogs.IDialogSettings;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.layout.PixelConverter;
import org.eclipse.jface.operation.IRunnableContext;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jpt.jpa.core.JptJpaCorePlugin;
import org.eclipse.jpt.jpa.core.internal.validation.JpaValidationMessages;
import org.eclipse.jpt.jpa.core.internal.validation.JpaValidationPreferences;
import org.eclipse.jpt.jpa.ui.JptJpaUiPlugin;
import org.eclipse.jpt.jpa.ui.internal.JptUiMessages;
import org.eclipse.jpt.jpa.ui.internal.JptUiValidationPreferenceMessages;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.forms.events.ExpansionAdapter;
import org.eclipse.ui.forms.events.ExpansionEvent;
import org.eclipse.ui.forms.widgets.ExpandableComposite;

/**
 * This page shows the Java Persistence validation options. It supports
 * workspace and project levels severities.
 *
 * @version 2.3
 * @since 2.2
 */
@SuppressWarnings("restriction")
public class JpaProblemSeveritiesPage extends PropertyAndPreferencePage {

	/**
	 * Severity level state is stored in this Map and is either committed or discarded
	 * based on user action.
	 * <br> key is the preferenceKey which is also the validation message key @see JpaValidationMessages.
	 * <br> value is a severity level - @see JpaValidationPreferences#ERROR WARNING INFO IGNORE
	 */
	private Map<String, String> severityLevels;

	/**
	 * Default severity levels are stored here,  ERROR is the default default so only need
	 * to include WARNING, INFO, IGNORE in this Map. These will be displayed if neither the project 
	 * or workspace preference applies.
	 * <br> key is the preferenceKey which is also the validation message key @see JpaValidationMessages.
	 * <br> value is a severity level - @see JpaValidationPreferences#ERROR WARNING INFO IGNORE
	 */
	private Map<String, String> defaultSeverities;
	
	/**
	 * The list of <code>Combo</code>s is cached in order to perform a revert of
	 * the properties.
	 */
	private List<Combo> combos;

	/**
	 * The list of <code>ExpandableComposite</code> is cached in order to save
	 * and restore the expansion state.
	 */
	private List<ExpandableComposite> expandablePanes;

	/**
	 * The position of the "Error" choice in the combo's model.
	 */
	private static final int ERROR_INDEX = 0;

	/**
	 * The position of the "Warning" choice in the combo's model.
	 */
	private static final int WARNING_INDEX = 1;

	/**
	 * The position of the "Info" choice in the combo's model.
	 */
	private static final int INFO_INDEX = 2;

	/**
	 * The position of the "Ignore" choice in the combo's model.
	 */
	private static final int IGNORE_INDEX = 3;

	/**
	 * The unique identifier for this page when it is shown in the IDE
	 * preferences dialog.
	 */
	private static final String JPT_PREFERENCES_PROBLEM_SEVERITIES_ID = "org.eclipse.jpt.jpa.ui.jpaProblemSeveritiesPreferences"; //$NON-NLS-1$

	/**
	 * The unique identifier for this page when it is shown in the project
	 * preferences dialog.
	 */
	private static final String JPT_PROPERTY_PAGES_PROBLEM_SEVERITIES_ID = "org.eclipse.jpt.jpa.ui.jpaProblemSeveritiesProperties"; //$NON-NLS-1$

	/**
	 * A constant used to store and retrieve the preference key (message ID) from
	 * the combo.
	 */
	private static final String PREFERENCE_KEY = "preferenceKey"; //$NON-NLS-1$

	/**
	 * The scrollable pane used to show the content of this page.
	 */
	private ScrolledPageContent scrollable;

	/**
	 * The possible choices which describes the severity of a single problem.
	 */
	private String[] severityDisplayStrings;

	/**
	 * Constant used to store the expansion state of each expandable pane.
	 */
	public static final String SETTINGS_EXPANDED = "expanded"; //$NON-NLS-1$

	/**
	 * The preference key used to retrieve the dialog settings where the expansion
	 * states have been stored.
	 */
	public static final String SETTINGS_SECTION_NAME = "JpaProblemSeveritiesPage"; //$NON-NLS-1$

	private Boolean hasProjectSpecificPreferences = null;

	/**
	 * Creates a new <code>JpaProblemSeveritiesPage</code>.
	 */
	public JpaProblemSeveritiesPage() {
		super();
		initialize();
	}

	@Override
	public void init(IWorkbench workbench) {
		this.setPreferenceStore(JptJpaUiPlugin.instance().getPreferenceStore());
		this.setDescription(JptUiMessages.JpaProblemSeveritiesPage_Description);
	}

	protected void initialize() {
		this.combos = new ArrayList<Combo>();
		this.expandablePanes = new ArrayList<ExpandableComposite>();
		this.severityDisplayStrings = buildSeverityDisplayStrings();
		this.severityLevels = new HashMap<String, String>();
		this.defaultSeverities = buildDefaultSeverties();
	}

	//since most of our problems have a default severity of ERROR, we are just defining the WARNING, INFO, IGNORE cases
	protected Map<String, String> buildDefaultSeverties() {
		 Map<String, String> defaultSeverities = new HashMap<String, String>();

		 defaultSeverities.put(JpaValidationMessages.PROJECT_NO_CONNECTION, JpaValidationPreferences.WARNING);
		 defaultSeverities.put(JpaValidationMessages.PROJECT_INVALID_CONNECTION, JpaValidationPreferences.WARNING);
		 defaultSeverities.put(JpaValidationMessages.PROJECT_INACTIVE_CONNECTION, JpaValidationPreferences.WARNING);
		 defaultSeverities.put(JpaValidationMessages.ENTITY_ABSTRACT_DISCRIMINATOR_VALUE_DEFINED, JpaValidationPreferences.WARNING);
		 defaultSeverities.put(JpaValidationMessages.ENTITY_TABLE_PER_CLASS_DISCRIMINATOR_VALUE_DEFINED, JpaValidationPreferences.WARNING);
		 defaultSeverities.put(JpaValidationMessages.ENTITY_TABLE_PER_CLASS_NOT_PORTABLE_ON_PLATFORM, JpaValidationPreferences.WARNING);
		 defaultSeverities.put(JpaValidationMessages.PERSISTENCE_UNIT_JAR_FILE_DEPLOYMENT_PATH_WARNING, JpaValidationPreferences.WARNING);
		 defaultSeverities.put(JpaValidationMessages.MAPPING_FILE_EXTRANEOUS_PERSISTENCE_UNIT_METADATA, JpaValidationPreferences.WARNING);
		 defaultSeverities.put(JpaValidationMessages.PERSISTENT_TYPE_ANNOTATED_BUT_NOT_INCLUDED_IN_PERSISTENCE_UNIT, JpaValidationPreferences.WARNING);
		 defaultSeverities.put(JpaValidationMessages.PERSISTENT_ATTRIBUTE_INHERITED_ATTRIBUTES_NOT_SUPPORTED, JpaValidationPreferences.WARNING);
		 defaultSeverities.put(JpaValidationMessages.PERSISTENCE_MULTIPLE_PERSISTENCE_UNITS, JpaValidationPreferences.WARNING);

		 defaultSeverities.put(JpaValidationMessages.XML_VERSION_NOT_LATEST, JpaValidationPreferences.INFO);
		 defaultSeverities.put(JpaValidationMessages.PERSISTENCE_UNIT_REDUNDANT_CLASS, JpaValidationPreferences.INFO);

		 return defaultSeverities;
	}

	@Override
	protected Control createPreferenceContent(Composite parent) {

		PixelConverter pixelConverter = new PixelConverter(parent);

		// Create a container because the caller will set the GridData and we need
		// to change the heightHint of the first child and we also need to set the
		// font otherwise the layout won't be calculated correctly
		Composite container = new Composite(parent, SWT.NONE);
		container.setFont(parent.getFont());
		GridLayout layout = new GridLayout(1, false);
		layout.marginHeight = 0;
		layout.marginWidth  = 0;
		container.setLayout(layout);

		// Create the main composite of this page
		this.scrollable = new ScrolledPageContent(container);

		GridData gridData = new GridData(GridData.FILL, GridData.FILL, true, true);
		gridData.heightHint = pixelConverter.convertHeightInCharsToPixels(20);
		this.scrollable.setLayoutData(gridData);

		// Update the layout of the ScrolledPageContent's body
		layout = new GridLayout(1, false);
		layout.marginHeight = 0;
		layout.marginWidth  = 0;

		parent = this.scrollable.getBody();
		parent.setLayoutData(new GridData(GridData.FILL, GridData.FILL, true, true));
		parent.setLayout(layout);

		// Add each expandable category
		addProjectLevelCategory(parent);
		addPersistenceUnitLevelCategory(parent);
		addTypeLevelCategory(parent);
		addAttributeLevelCategory(parent);
		addDatabaseCategory(parent);
		addInheritanceStrategyCategory(parent);
		addQueriesGeneratorsCategory(parent);

		// Restore the expansion states
		restoreSectionExpansionStates(getDialogPreferences());

		return container;
	}

	protected void restoreSectionExpansionStates(IDialogSettings settings) {
		for (int index = this.expandablePanes.size(); --index >= 0; ) {
			ExpandableComposite expandablePane = this.expandablePanes.get(index);

			if (settings == null) {
				// Only expand the first node by default
				expandablePane.setExpanded(index == 0);
			}
			else {
				expandablePane.setExpanded(settings.getBoolean(SETTINGS_EXPANDED + index));
			}
		}
	}

	@Override
	public Point computeSize() {
		return this.doComputeSize();
	}

	private void addProjectLevelCategory(Composite parent) {

		parent = addExpandableSection(parent, JptUiValidationPreferenceMessages.PROJECT_LEVEL_CATEGORY);

		addLabeledCombo(parent, JptUiValidationPreferenceMessages.NO_JPA_PROJECT,                         JpaValidationMessages.NO_JPA_PROJECT);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PROJECT_NO_CONNECTION,                  JpaValidationMessages.PROJECT_NO_CONNECTION);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PROJECT_INVALID_CONNECTION,             JpaValidationMessages.PROJECT_INVALID_CONNECTION);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PROJECT_INACTIVE_CONNECTION,            JpaValidationMessages.PROJECT_INACTIVE_CONNECTION);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.XML_VERSION_NOT_LATEST,                 JpaValidationMessages.XML_VERSION_NOT_LATEST);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PROJECT_NO_PERSISTENCE_XML,             JpaValidationMessages.PROJECT_NO_PERSISTENCE_XML);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PROJECT_MULTIPLE_PERSISTENCE_XML,       JpaValidationMessages.PROJECT_MULTIPLE_PERSISTENCE_XML);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_NO_PERSISTENCE_UNIT,        JpaValidationMessages.PERSISTENCE_NO_PERSISTENCE_UNIT);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_MULTIPLE_PERSISTENCE_UNITS, JpaValidationMessages.PERSISTENCE_MULTIPLE_PERSISTENCE_UNITS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_XML_INVALID_CONTENT,        JpaValidationMessages.PERSISTENCE_XML_INVALID_CONTENT);
	}

	private void addPersistenceUnitLevelCategory(Composite parent) {

		parent = addExpandableSection(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_LEVEL_CATEGORY);

		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_UNSPECIFIED_MAPPING_FILE,                      JpaValidationMessages.PERSISTENCE_UNIT_UNSPECIFIED_MAPPING_FILE);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_UNSUPPORTED_MAPPING_FILE_CONTENT,              JpaValidationMessages.PERSISTENCE_UNIT_UNSUPPORTED_MAPPING_FILE_CONTENT);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_NONEXISTENT_MAPPING_FILE,                      JpaValidationMessages.PERSISTENCE_UNIT_NONEXISTENT_MAPPING_FILE);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_INVALID_MAPPING_FILE,                          JpaValidationMessages.PERSISTENCE_UNIT_INVALID_MAPPING_FILE);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_DUPLICATE_MAPPING_FILE,                        JpaValidationMessages.PERSISTENCE_UNIT_DUPLICATE_MAPPING_FILE);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_UNSPECIFIED_CLASS,                             JpaValidationMessages.PERSISTENCE_UNIT_UNSPECIFIED_CLASS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_NONEXISTENT_CLASS,                             JpaValidationMessages.PERSISTENCE_UNIT_NONEXISTENT_CLASS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_INVALID_CLASS,                                 JpaValidationMessages.PERSISTENCE_UNIT_INVALID_CLASS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_DUPLICATE_CLASS,                               JpaValidationMessages.PERSISTENCE_UNIT_DUPLICATE_CLASS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_REDUNDANT_CLASS,                               JpaValidationMessages.PERSISTENCE_UNIT_REDUNDANT_CLASS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_DUPLICATE_JAR_FILE,                            JpaValidationMessages.PERSISTENCE_UNIT_DUPLICATE_JAR_FILE);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_UNSPECIFIED_JAR_FILE,                          JpaValidationMessages.PERSISTENCE_UNIT_UNSPECIFIED_JAR_FILE);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_JAR_FILE_DEPLOYMENT_PATH_WARNING,              JpaValidationMessages.PERSISTENCE_UNIT_JAR_FILE_DEPLOYMENT_PATH_WARNING);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PERSISTENCE_UNIT_NONEXISTENT_JAR_FILE,                          JpaValidationMessages.PERSISTENCE_UNIT_NONEXISTENT_JAR_FILE);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.MAPPING_FILE_EXTRANEOUS_PERSISTENCE_UNIT_METADATA,              JpaValidationMessages.MAPPING_FILE_EXTRANEOUS_PERSISTENCE_UNIT_METADATA);
	}

	private void addTypeLevelCategory(Composite parent) {

		parent = addExpandableSection(parent, JptUiValidationPreferenceMessages.TYPE_LEVEL_CATEGORY);

		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.PERSISTENT_TYPE_MAPPED_BUT_NOT_INCLUDED_IN_PERSISTENCE_UNIT,
			JpaValidationMessages.PERSISTENT_TYPE_MAPPED_BUT_NOT_INCLUDED_IN_PERSISTENCE_UNIT);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.PERSISTENT_TYPE_ANNOTATED_BUT_NOT_INCLUDED_IN_PERSISTENCE_UNIT,
			JpaValidationMessages.PERSISTENT_TYPE_ANNOTATED_BUT_NOT_INCLUDED_IN_PERSISTENCE_UNIT);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.PERSISTENT_TYPE_UNSPECIFIED_CLASS,
			JpaValidationMessages.PERSISTENT_TYPE_UNSPECIFIED_CLASS);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.PERSISTENT_TYPE_UNRESOLVED_CLASS,
			JpaValidationMessages.PERSISTENT_TYPE_UNRESOLVED_CLASS);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.ENTITY_NO_PK,
			JpaValidationMessages.ENTITY_NO_PK);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.TYPE_MAPPING_FINAL_CLASS,
			JpaValidationMessages.TYPE_MAPPING_FINAL_CLASS);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.TYPE_MAPPING_MEMBER_CLASS,
			JpaValidationMessages.TYPE_MAPPING_MEMBER_CLASS);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.TYPE_MAPPING_CLASS_MISSING_NO_ARG_CONSTRUCTOR,
			JpaValidationMessages.TYPE_MAPPING_CLASS_MISSING_NO_ARG_CONSTRUCTOR);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.TYPE_MAPPING_CLASS_PRIVATE_NO_ARG_CONSTRUCTOR,
			JpaValidationMessages.TYPE_MAPPING_CLASS_PRIVATE_NO_ARG_CONSTRUCTOR);
	}

	private void addAttributeLevelCategory(Composite parent) {

		parent = addExpandableSection(parent, JptUiValidationPreferenceMessages.ATTRIBUTE_LEVEL_CATEGORY);
		
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.PERSISTENT_ATTRIBUTE_UNSPECIFIED_NAME,
			JpaValidationMessages.PERSISTENT_ATTRIBUTE_UNSPECIFIED_NAME);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.PERSISTENT_ATTRIBUTE_UNRESOLVED_NAME,
			JpaValidationMessages.PERSISTENT_ATTRIBUTE_UNRESOLVED_NAME);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.PERSISTENT_ATTRIBUTE_INHERITED_ATTRIBUTES_NOT_SUPPORTED
			, JpaValidationMessages.PERSISTENT_ATTRIBUTE_INHERITED_ATTRIBUTES_NOT_SUPPORTED);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.PERSISTENT_ATTRIBUTE_INVALID_MAPPING,
			JpaValidationMessages.PERSISTENT_ATTRIBUTE_INVALID_MAPPING);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.PERSISTENT_ATTRIBUTE_FINAL_FIELD,
			JpaValidationMessages.PERSISTENT_ATTRIBUTE_FINAL_FIELD);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.PERSISTENT_ATTRIBUTE_FINAL_GETTER,
			JpaValidationMessages.PERSISTENT_ATTRIBUTE_FINAL_GETTER);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.PERSISTENT_ATTRIBUTE_PUBLIC_FIELD,
			JpaValidationMessages.PERSISTENT_ATTRIBUTE_PUBLIC_FIELD);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.MAPPING_UNRESOLVED_MAPPED_BY,
			JpaValidationMessages.MAPPING_UNRESOLVED_MAPPED_BY);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.MAPPING_INVALID_MAPPED_BY,
			JpaValidationMessages.MAPPING_INVALID_MAPPED_BY);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.MAPPING_MAPPED_BY_ON_BOTH_SIDES,
			JpaValidationMessages.MAPPING_MAPPED_BY_ON_BOTH_SIDES);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.TARGET_ENTITY_NOT_DEFINED,
			JpaValidationMessages.TARGET_ENTITY_NOT_DEFINED);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.TARGET_ENTITY_IS_NOT_AN_ENTITY,
			JpaValidationMessages.TARGET_ENTITY_IS_NOT_AN_ENTITY);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.MAPS_ID_VALUE_NOT_SPECIFIED,
			JpaValidationMessages.MAPS_ID_VALUE_NOT_SPECIFIED);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.MAPS_ID_VALUE_NOT_RESOLVED,
			JpaValidationMessages.MAPS_ID_VALUE_NOT_RESOLVED);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.MAPS_ID_VALUE_INVALID,
			JpaValidationMessages.MAPS_ID_VALUE_INVALID);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.ORDER_COLUMN_AND_ORDER_BY_BOTH_SPECIFIED,
			JpaValidationMessages.ORDER_COLUMN_AND_ORDER_BY_BOTH_SPECIFIED);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.ELEMENT_COLLECTION_TARGET_CLASS_NOT_DEFINED,
			JpaValidationMessages.ELEMENT_COLLECTION_TARGET_CLASS_NOT_DEFINED);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.ELEMENT_COLLECTION_TARGET_CLASS_MUST_BE_EMBEDDABLE_OR_BASIC_TYPE,
			JpaValidationMessages.ELEMENT_COLLECTION_TARGET_CLASS_MUST_BE_EMBEDDABLE_OR_BASIC_TYPE);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.ELEMENT_COLLECTION_MAP_KEY_CLASS_NOT_DEFINED,
			JpaValidationMessages.ELEMENT_COLLECTION_MAP_KEY_CLASS_NOT_DEFINED);

		parent = addSubExpandableSection(parent, JptUiValidationPreferenceMessages.IMPLIED_ATTRIBUTE_LEVEL_CATEGORY);
		
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_TARGET_ENTITY_IS_NOT_AN_ENTITY,
			JpaValidationMessages.VIRTUAL_ATTRIBUTE_TARGET_ENTITY_IS_NOT_AN_ENTITY);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_TARGET_ENTITY_NOT_DEFINED,
			JpaValidationMessages.VIRTUAL_ATTRIBUTE_TARGET_ENTITY_NOT_DEFINED);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ELEMENT_COLLECTION_TARGET_CLASS_NOT_DEFINED,
			JpaValidationMessages.VIRTUAL_ATTRIBUTE_ELEMENT_COLLECTION_TARGET_CLASS_NOT_DEFINED);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ELEMENT_COLLECTION_TARGET_CLASS_MUST_BE_EMBEDDABLE_OR_BASIC_TYPE,
			JpaValidationMessages.VIRTUAL_ATTRIBUTE_ELEMENT_COLLECTION_TARGET_CLASS_MUST_BE_EMBEDDABLE_OR_BASIC_TYPE);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ELEMENT_COLLECTION_MAP_KEY_CLASS_NOT_DEFINED,
			JpaValidationMessages.VIRTUAL_ATTRIBUTE_ELEMENT_COLLECTION_MAP_KEY_CLASS_NOT_DEFINED);	
	}

	private void addDatabaseCategory(Composite parent) {
		parent = addExpandableSection(parent, JptUiValidationPreferenceMessages.DATABASE_CATEGORY);
		parent.setLayout(new GridLayout(1, false));

		addTableCategory(parent);
		addColumnCategory(parent);
		addOverridesCategory(parent);
	}

	private void addTableCategory(Composite parent) {
		
		parent = addExpandableSection(parent, JptUiValidationPreferenceMessages.TABLE_CATEGORY);
		
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.TABLE_UNRESOLVED_CATALOG,                                            					JpaValidationMessages.TABLE_UNRESOLVED_CATALOG);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.TABLE_UNRESOLVED_SCHEMA,                                             					JpaValidationMessages.TABLE_UNRESOLVED_SCHEMA);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.TABLE_UNRESOLVED_NAME,                                               					JpaValidationMessages.TABLE_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.SECONDARY_TABLE_UNRESOLVED_CATALOG,                                  					JpaValidationMessages.SECONDARY_TABLE_UNRESOLVED_CATALOG);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.SECONDARY_TABLE_UNRESOLVED_SCHEMA,                                   					JpaValidationMessages.SECONDARY_TABLE_UNRESOLVED_SCHEMA);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.SECONDARY_TABLE_UNRESOLVED_NAME,                                     					JpaValidationMessages.SECONDARY_TABLE_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.JOIN_TABLE_UNRESOLVED_CATALOG,                                       					JpaValidationMessages.JOIN_TABLE_UNRESOLVED_CATALOG);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.JOIN_TABLE_UNRESOLVED_SCHEMA,                                        					JpaValidationMessages.JOIN_TABLE_UNRESOLVED_SCHEMA);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.JOIN_TABLE_UNRESOLVED_NAME,                                          					JpaValidationMessages.JOIN_TABLE_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_SECONDARY_TABLE_PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_NAME, 										JpaValidationMessages.VIRTUAL_SECONDARY_TABLE_PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_SECONDARY_TABLE_PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME, 					JpaValidationMessages.VIRTUAL_SECONDARY_TABLE_PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_SECONDARY_TABLE_PRIMARY_KEY_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS, 		JpaValidationMessages.VIRTUAL_SECONDARY_TABLE_PRIMARY_KEY_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_SECONDARY_TABLE_PRIMARY_KEY_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS, JpaValidationMessages.VIRTUAL_SECONDARY_TABLE_PRIMARY_KEY_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.COLLECTION_TABLE_UNRESOLVED_CATALOG,                                					JpaValidationMessages.COLLECTION_TABLE_UNRESOLVED_CATALOG);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.COLLECTION_TABLE_UNRESOLVED_SCHEMA,                                 		 			JpaValidationMessages.COLLECTION_TABLE_UNRESOLVED_SCHEMA);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.COLLECTION_TABLE_UNRESOLVED_NAME,                                    					JpaValidationMessages.COLLECTION_TABLE_UNRESOLVED_NAME);

		parent = addSubExpandableSection(parent, JptUiValidationPreferenceMessages.IMPLIED_ATTRIBUTE_LEVEL_CATEGORY);

		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_JOIN_TABLE_UNRESOLVED_CATALOG,                                      JpaValidationMessages.VIRTUAL_ATTRIBUTE_JOIN_TABLE_UNRESOLVED_CATALOG);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_JOIN_TABLE_UNRESOLVED_SCHEMA,                                       JpaValidationMessages.VIRTUAL_ATTRIBUTE_JOIN_TABLE_UNRESOLVED_SCHEMA);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_JOIN_TABLE_UNRESOLVED_NAME,                                         JpaValidationMessages.VIRTUAL_ATTRIBUTE_JOIN_TABLE_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_COLLECTION_TABLE_UNRESOLVED_CATALOG,                                JpaValidationMessages.VIRTUAL_ATTRIBUTE_COLLECTION_TABLE_UNRESOLVED_CATALOG);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_COLLECTION_TABLE_UNRESOLVED_SCHEMA,                                 JpaValidationMessages.VIRTUAL_ATTRIBUTE_COLLECTION_TABLE_UNRESOLVED_SCHEMA);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_COLLECTION_TABLE_UNRESOLVED_NAME,                                   JpaValidationMessages.VIRTUAL_ATTRIBUTE_COLLECTION_TABLE_UNRESOLVED_NAME);
	}
	
	private void addColumnCategory(Composite parent) {	
		parent = addExpandableSection(parent, JptUiValidationPreferenceMessages.COLUMN_CATEGORY);
		
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.COLUMN_TABLE_NOT_VALID,                                      							JpaValidationMessages.COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.COLUMN_UNRESOLVED_TABLE,                                             					JpaValidationMessages.COLUMN_UNRESOLVED_TABLE);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.COLUMN_UNRESOLVED_NAME,                                              					JpaValidationMessages.COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.JOIN_COLUMN_TABLE_NOT_VALID,                                  						JpaValidationMessages.JOIN_COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.JOIN_COLUMN_UNRESOLVED_NAME,                                         					JpaValidationMessages.JOIN_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS,                   			JpaValidationMessages.JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME,                       					JpaValidationMessages.JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS, 			JpaValidationMessages.JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.INVERSE_JOIN_COLUMN_TABLE_NOT_VALID,                                  				JpaValidationMessages.INVERSE_JOIN_COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.INVERSE_JOIN_COLUMN_UNRESOLVED_NAME,                                         			JpaValidationMessages.INVERSE_JOIN_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.INVERSE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS,                   	JpaValidationMessages.INVERSE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.INVERSE_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME,                       			JpaValidationMessages.INVERSE_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.INVERSE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS, 	JpaValidationMessages.INVERSE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_NAME,                            	 				JpaValidationMessages.PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PRIMARY_KEY_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS,                 JpaValidationMessages.PRIMARY_KEY_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME,           					JpaValidationMessages.PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PRIMARY_KEY_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS,JpaValidationMessages.PRIMARY_KEY_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_NAME, 														JpaValidationMessages.VIRTUAL_PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_PRIMARY_KEY_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS, 						JpaValidationMessages.VIRTUAL_PRIMARY_KEY_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME, 									JpaValidationMessages.VIRTUAL_PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_PRIMARY_KEY_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS, 														JpaValidationMessages.VIRTUAL_PRIMARY_KEY_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.ORDER_COLUMN_UNRESOLVED_NAME,                                        					JpaValidationMessages.ORDER_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.MAP_KEY_COLUMN_TABLE_NOT_VALID, 														JpaValidationMessages.MAP_KEY_COLUMN_TABLE_NOT_VALID);

		parent = addSubExpandableSection(parent, JptUiValidationPreferenceMessages.IMPLIED_ATTRIBUTE_LEVEL_CATEGORY);

		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_COLUMN_UNRESOLVED_NAME,                                              				JpaValidationMessages.VIRTUAL_ATTRIBUTE_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_COLUMN_TABLE_NOT_VALID,                  				                   	 		JpaValidationMessages.VIRTUAL_ATTRIBUTE_COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_JOIN_COLUMN_UNRESOLVED_TABLE,                                        				JpaValidationMessages.VIRTUAL_ATTRIBUTE_JOIN_COLUMN_UNRESOLVED_TABLE);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_JOIN_COLUMN_UNRESOLVED_NAME,                                         				JpaValidationMessages.VIRTUAL_ATTRIBUTE_JOIN_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS,                   		JpaValidationMessages.VIRTUAL_ATTRIBUTE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME,                       				JpaValidationMessages.VIRTUAL_ATTRIBUTE_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS,		 	JpaValidationMessages.VIRTUAL_ATTRIBUTE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_JOIN_COLUMN_TABLE_NOT_VALID,      													JpaValidationMessages.VIRTUAL_ATTRIBUTE_JOIN_COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_INVERSE_JOIN_COLUMN_TABLE_NOT_VALID,      											JpaValidationMessages.VIRTUAL_ATTRIBUTE_INVERSE_JOIN_COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_INVERSE_JOIN_COLUMN_UNRESOLVED_NAME,      											JpaValidationMessages.VIRTUAL_ATTRIBUTE_INVERSE_JOIN_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_INVERSE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS,      				JpaValidationMessages.VIRTUAL_ATTRIBUTE_INVERSE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_INVERSE_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME,      						JpaValidationMessages.VIRTUAL_ATTRIBUTE_INVERSE_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_INVERSE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS, JpaValidationMessages.VIRTUAL_ATTRIBUTE_INVERSE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_NAME,                            	 								JpaValidationMessages.VIRTUAL_ATTRIBUTE_PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PRIMARY_KEY_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS,                 				JpaValidationMessages.VIRTUAL_ATTRIBUTE_PRIMARY_KEY_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME,           									JpaValidationMessages.VIRTUAL_ATTRIBUTE_PRIMARY_KEY_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.PRIMARY_KEY_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS,				JpaValidationMessages.VIRTUAL_ATTRIBUTE_PRIMARY_KEY_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ORDER_COLUMN_UNRESOLVED_NAME,                                        				JpaValidationMessages.VIRTUAL_ATTRIBUTE_ORDER_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_MAP_KEY_COLUMN_TABLE_NOT_VALID, 													JpaValidationMessages.VIRTUAL_ATTRIBUTE_MAP_KEY_COLUMN_TABLE_NOT_VALID);
	}

	private void addOverridesCategory(Composite parent) {	

		parent = addExpandableSection(parent, JptUiValidationPreferenceMessages.OVERRIDES_CATEGORY);

		addLabeledCombo(parent, JptUiValidationPreferenceMessages.ATTRIBUTE_OVERRIDE_INVALID_NAME,                    									JpaValidationMessages.ATTRIBUTE_OVERRIDE_INVALID_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.ASSOCIATION_OVERRIDE_INVALID_NAME,                    								JpaValidationMessages.ASSOCIATION_OVERRIDE_INVALID_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_OVERRIDE_INVALID_NAME,                    							JpaValidationMessages.VIRTUAL_ATTRIBUTE_OVERRIDE_INVALID_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_INVALID_NAME,                    						JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_INVALID_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_MAP_KEY_ATTRIBUTE_OVERRIDE_INVALID_NAME,                    					JpaValidationMessages.VIRTUAL_MAP_KEY_ATTRIBUTE_OVERRIDE_INVALID_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_OVERRIDE_COLUMN_TABLE_NOT_VALID,                    				JpaValidationMessages.VIRTUAL_ATTRIBUTE_OVERRIDE_COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_OVERRIDE_COLUMN_UNRESOLVED_NAME,                                    JpaValidationMessages.VIRTUAL_ATTRIBUTE_OVERRIDE_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_MAP_KEY_ATTRIBUTE_OVERRIDE_COLUMN_TABLE_NOT_VALID, 							JpaValidationMessages.VIRTUAL_MAP_KEY_ATTRIBUTE_OVERRIDE_COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_TABLE_UNRESOLVED_CATALOG, 							JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_TABLE_UNRESOLVED_CATALOG);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_TABLE_UNRESOLVED_SCHEMA, 							JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_TABLE_UNRESOLVED_SCHEMA);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_TABLE_UNRESOLVED_NAME, 								JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_TABLE_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_COLUMN_UNRESOLVED_NAME,                   							JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME, 							JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_COLUMN_TABLE_NOT_VALID, 											JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS, 				JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS, JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_UNRESOLVED_NAME,                   							JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME, 							JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_UNRESOLVED_REFERENCED_COLUMN_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_TABLE_NOT_VALID, 											JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_INVERSE_JOIN_COLUMNS, 				JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_INVERSE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_INVERSE_JOIN_COLUMNS, JpaValidationMessages.VIRTUAL_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_INVERSE_JOIN_COLUMNS);

		
		parent = addSubExpandableSection(parent, JptUiValidationPreferenceMessages.IMPLIED_ATTRIBUTE_LEVEL_CATEGORY);

		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ATTRIBUTE_OVERRIDE_INVALID_NAME,                  									JpaValidationMessages.VIRTUAL_ATTRIBUTE_ATTRIBUTE_OVERRIDE_INVALID_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_INVALID_NAME,                  								JpaValidationMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_INVALID_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_MAP_KEY_ATTRIBUTE_OVERRIDE_INVALID_NAME,                  							JpaValidationMessages.VIRTUAL_ATTRIBUTE_MAP_KEY_ATTRIBUTE_OVERRIDE_INVALID_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ATTRIBUTE_OVERRIDE_COLUMN_TABLE_NOT_VALID,                  						JpaValidationMessages.VIRTUAL_ATTRIBUTE_ATTRIBUTE_OVERRIDE_COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ATTRIBUTE_OVERRIDE_COLUMN_UNRESOLVED_NAME,                                  		JpaValidationMessages.VIRTUAL_ATTRIBUTE_ATTRIBUTE_OVERRIDE_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_MAP_KEY_ATTRIBUTE_OVERRIDE_COLUMN_TABLE_NOT_VALID, 									JpaValidationMessages.VIRTUAL_ATTRIBUTE_MAP_KEY_ATTRIBUTE_OVERRIDE_COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_JOIN_COLUMN_TABLE_NOT_VALID,                   				JpaValidationMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_JOIN_COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_JOIN_COLUMN_UNRESOLVED_NAME, 									JpaValidationMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_JOIN_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_JOIN_COLUMN_REFERENCED_COLUMN_UNRESOLVED_NAME, 				JpaValidationMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_JOIN_COLUMN_REFERENCED_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS, 		JpaValidationMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS, JpaValidationMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_TABLE_NOT_VALID,                   				JpaValidationMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_TABLE_NOT_VALID);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_UNRESOLVED_NAME, 									JpaValidationMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_REFERENCED_COLUMN_UNRESOLVED_NAME, 				JpaValidationMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_REFERENCED_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_INVERSE_JOIN_COLUMNS, 		JpaValidationMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_INVERSE_JOIN_COLUMNS);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_INVERSE_JOIN_COLUMNS, JpaValidationMessages.VIRTUAL_ATTRIBUTE_ASSOCIATION_OVERRIDE_INVERSE_JOIN_COLUMN_REFERENCED_COLUMN_NAME_MUST_BE_SPECIFIED_MULTIPLE_INVERSE_JOIN_COLUMNS);
	}

	private void addInheritanceStrategyCategory(Composite parent) {

		parent = addExpandableSection(parent, JptUiValidationPreferenceMessages.INHERITANCE_CATEGORY);

		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.DISCRIMINATOR_COLUMN_UNRESOLVED_NAME,
			JpaValidationMessages.DISCRIMINATOR_COLUMN_UNRESOLVED_NAME);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.ENTITY_TABLE_PER_CLASS_NOT_SUPPORTED_ON_PLATFORM,
			JpaValidationMessages.ENTITY_TABLE_PER_CLASS_NOT_SUPPORTED_ON_PLATFORM);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.ENTITY_TABLE_PER_CLASS_NOT_PORTABLE_ON_PLATFORM,
			JpaValidationMessages.ENTITY_TABLE_PER_CLASS_NOT_PORTABLE_ON_PLATFORM);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.ENTITY_SINGLE_TABLE_DESCENDANT_DEFINES_TABLE,
			JpaValidationMessages.ENTITY_SINGLE_TABLE_DESCENDANT_DEFINES_TABLE);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.ENTITY_ABSTRACT_TABLE_PER_CLASS_DEFINES_TABLE,
			JpaValidationMessages.ENTITY_ABSTRACT_TABLE_PER_CLASS_DEFINES_TABLE);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.ENTITY_ABSTRACT_DISCRIMINATOR_VALUE_DEFINED,
			JpaValidationMessages.ENTITY_ABSTRACT_DISCRIMINATOR_VALUE_DEFINED);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.ENTITY_TABLE_PER_CLASS_DISCRIMINATOR_VALUE_DEFINED,
			JpaValidationMessages.ENTITY_TABLE_PER_CLASS_DISCRIMINATOR_VALUE_DEFINED);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.ENTITY_NON_ROOT_DISCRIMINATOR_COLUMN_DEFINED,
			JpaValidationMessages.ENTITY_NON_ROOT_DISCRIMINATOR_COLUMN_DEFINED);
		addLabeledCombo(
			parent, JptUiValidationPreferenceMessages.ENTITY_TABLE_PER_CLASS_DISCRIMINATOR_COLUMN_DEFINED,
			JpaValidationMessages.ENTITY_TABLE_PER_CLASS_DISCRIMINATOR_COLUMN_DEFINED);
	}

	private void addQueriesGeneratorsCategory(Composite parent) {

		parent = addExpandableSection(parent, JptUiValidationPreferenceMessages.QUERIES_GENERATORS_CATEGORY);

		addLabeledCombo(parent, JptUiValidationPreferenceMessages.GENERATOR_DUPLICATE_NAME,             JpaValidationMessages.GENERATOR_DUPLICATE_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.ID_MAPPING_UNRESOLVED_GENERATOR_NAME, JpaValidationMessages.ID_MAPPING_UNRESOLVED_GENERATOR_NAME);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.GENERATED_VALUE_UNRESOLVED_GENERATOR, JpaValidationMessages.GENERATED_VALUE_UNRESOLVED_GENERATOR);
		addLabeledCombo(parent, JptUiValidationPreferenceMessages.QUERY_DUPLICATE_NAME,                 JpaValidationMessages.QUERY_DUPLICATE_NAME);
	}
	
	private Composite addExpandableSection(Composite parent, String text) {
		return addExpandableSection(parent, text, new GridData(GridData.FILL, GridData.FILL, true, false));
	}
	
	private Composite addSubExpandableSection(Composite parent, String text) {
		return addExpandableSection(parent, text, new GridData(GridData.FILL, GridData.FILL, true, false, 2, 1));
	}

	/**
	 * Creates and adds to the given <code>Composite</code> an expandable pane
	 * where its content can be shown or hidden depending on the expansion state.
	 *
	 * @param parent The parent container
	 * @param text The title of the expandable section
	 * @return The container to which widgets can be added, which is a child of
	 * the expandable pane
	 */
	private Composite addExpandableSection(Composite parent, String text, GridData gridData) {
		ExpandableComposite expandablePane = new ExpandableComposite(
			parent,
			SWT.NONE,
			ExpandableComposite.TWISTIE | ExpandableComposite.CLIENT_INDENT
		);

		expandablePane.setText(text);
		expandablePane.setExpanded(false);
		expandablePane.setFont(JFaceResources.getFontRegistry().getBold(JFaceResources.DIALOG_FONT));
		expandablePane.setLayoutData(gridData);
		expandablePane.addExpansionListener(buildExpansionListener());

		this.scrollable.adaptChild(expandablePane);
		this.expandablePanes.add(expandablePane);

		parent = new Composite(expandablePane, SWT.NONE);
		parent.setLayout(new GridLayout(2, false));
		expandablePane.setClient(parent);

		return parent;
	}

	/**
	 * Creates and adds to the given parent a labeled combo where the possible
	 * choices are "Ignore", "Error" and "Warning".
	 *
	 * @param parent The parent to which the widgets are added
	 * @param labelText The text labelling the combo
	 * @param preferenceKey The key used to retrieve and to store the value
	 * associated with the validation problem
	 */
	private void addLabeledCombo(Composite parent, String labelText, String preferenceKey) {
		Label label = new Label(parent, SWT.NONE);
		label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		label.setText(labelText);

		Combo combo = new Combo(parent, SWT.READ_ONLY);
		combo.setItems(this.severityDisplayStrings);
		combo.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));
		combo.setData(PREFERENCE_KEY, preferenceKey);
		combo.select(convertPreferenceKeyToComboIndex(preferenceKey));
		combo.addSelectionListener(buildComboSelectionListener());

		this.scrollable.adaptChild(combo);
		this.combos.add(combo);
	}

	private SelectionListener buildComboSelectionListener() {
		return new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {
				Combo combo = (Combo) e.widget;
				String preferenceKey = (String) combo.getData(PREFERENCE_KEY);
				String value = convertToPreferenceValue(combo.getSelectionIndex());
				JpaProblemSeveritiesPage.this.severityLevels.put(preferenceKey, value);
			}
		};
	}

	private ExpansionAdapter buildExpansionListener() {
		return new ExpansionAdapter() {
			@Override
			public void expansionStateChanged(ExpansionEvent e) {
				JpaProblemSeveritiesPage.this.expansionStateChanged();
			}
		};
	}

	protected String[] buildSeverityDisplayStrings() {
		String[] severities = new String[4];
		severities[ERROR_INDEX]   = JptUiMessages.JpaProblemSeveritiesPage_Error;
		severities[WARNING_INDEX] = JptUiMessages.JpaProblemSeveritiesPage_Warning;
		severities[INFO_INDEX]    = JptUiMessages.JpaProblemSeveritiesPage_Info;
		severities[IGNORE_INDEX]  = JptUiMessages.JpaProblemSeveritiesPage_Ignore;
		return severities;
	}

	protected int convertPreferenceKeyToComboIndex(String preferenceKey) {
		return convertPreferenceValueToComboIndex(getPreferenceValue(preferenceKey));
	}

	protected String getPreferenceValue(String preferenceKey) {
		String preference = null;
		if (isProjectPreferencePage() && hasProjectSpecificOptions(getProject())) { //useProjectSettings() won't work since the page is being built
			preference = JpaValidationPreferences.getProjectLevelProblemPreference(getProject(), preferenceKey);
		}
		else {
			//don't get the workspace preference when the project has overridden workspace preferences
			preference = JpaValidationPreferences.getWorkspaceLevelProblemPreference(preferenceKey);
		}
		if (preference == null) {
			preference = getDefaultPreferenceValue(preferenceKey);
		}
		return preference;
	}

	/**
	 * Return the default severity or ERROR if no default exists.
	 */
	protected String getDefaultPreferenceValue(String preferenceKey) {
		String preference = this.defaultSeverities.get(preferenceKey);
		return preference == null ? JpaValidationPreferences.ERROR : preference;
	}
	
	protected int convertPreferenceValueToComboIndex(String preferenceValue) {
		if (JpaValidationPreferences.ERROR.equals(preferenceValue)) {
			return ERROR_INDEX;
		}
		if (JpaValidationPreferences.WARNING.equals(preferenceValue)) {
			return WARNING_INDEX;
		}
		if (JpaValidationPreferences.INFO.equals(preferenceValue)) {
			return INFO_INDEX;
		}
		if (JpaValidationPreferences.IGNORE.equals(preferenceValue)) {
			return IGNORE_INDEX;
		}
		throw new IllegalStateException();
	}

	protected String convertToPreferenceValue(int selectionIndex) {
		switch (selectionIndex) {
			case ERROR_INDEX:   return JpaValidationPreferences.ERROR;
			case WARNING_INDEX: return JpaValidationPreferences.WARNING;
			case INFO_INDEX:    return JpaValidationPreferences.INFO;
			case IGNORE_INDEX:  return JpaValidationPreferences.IGNORE;
			default:            return null;
		}
	}

	/**
	 * Revalidates the layout in order to show or hide the vertical scroll bar
	 * after a section was either expanded or collapsed. This unfortunately does
	 * not happen automatically.
	 */
	protected void expansionStateChanged() {
		this.scrollable.reflow(true);
	}

	@Override
	protected String getPreferencePageID() {
		return JPT_PREFERENCES_PROBLEM_SEVERITIES_ID;
	}

	@Override
	protected String getPropertyPageID() {
		return JPT_PROPERTY_PAGES_PROBLEM_SEVERITIES_ID;
	}

	protected IEclipsePreferences getProjectPreferences(IProject project) {
		return JptJpaCorePlugin.getProjectPreferences(project);
	}

	@Override
	protected boolean hasProjectSpecificOptions(IProject project) {
		IEclipsePreferences projectPreferences = getProjectPreferences(project);
		return projectPreferences.getBoolean(JpaValidationPreferences.WORKSPACE_PREFERENCES_OVERRIDEN, false);
	}

	@Override
	protected void performDefaults() {
		super.performDefaults();
		//this call would be redundant on project preference page - bug in the JDT superclass
		if (!isProjectPreferencePage()) {
			revertToDefault();
		}
	}
	
	@Override
	protected void enableProjectSpecificSettings(boolean useProjectSpecificSettings) {
		super.enableProjectSpecificSettings(useProjectSpecificSettings);
		if (getDefaultsButton() == null) {
			//@Hack("If the defaults button is null the control is currently being built," +
			//      "otherwise the 'enable project specific settings' checkbox is being pressed")
			return;
		}
		
		this.hasProjectSpecificPreferences = Boolean.valueOf(useProjectSpecificSettings);
		
		//set all specified workspace preferences in the project preferences
		if (useProjectSpecificSettings){
			this.overrideWorkspacePreferences();
		}
		else {//remove any project specific settings if set to false
			this.revertToDefault();
		}
	}

	@Override
	protected void noDefaultAndApplyButton() {
		throw new IllegalStateException("Don't call this, see enableProjectSpecificSettings for the hack that looks for the defaultsButton being null"); //$NON-NLS-1$
	}

	protected void revertToDefault() {
		for (Combo combo : this.combos) {
			String preferenceKey = (String) combo.getData(PREFERENCE_KEY);
			String preference = JpaValidationPreferences.getWorkspaceLevelProblemPreference(preferenceKey);
			if (preference == null) {
				preference = getDefaultPreferenceValue(preferenceKey);
			}
			combo.select(convertPreferenceValueToComboIndex(preference));
			//UI will show the defaults from the workspace, but set all preferences 
			//to null so they will be deleted from project preferences
			this.severityLevels.put(preferenceKey, null);
		}
	}

	protected void overrideWorkspacePreferences() {
		for (Combo combo : this.combos) {
			String preferenceKey = (String) combo.getData(PREFERENCE_KEY);
			String workspacePreference = JpaValidationPreferences.getWorkspaceLevelProblemPreference(preferenceKey);
			String defaultPreference = getDefaultPreferenceValue(preferenceKey);
			if (workspacePreference != null && !workspacePreference.equals(defaultPreference)) {
				combo.select(convertPreferenceValueToComboIndex(workspacePreference));
				//silly combo doesn't fire a selection event, so we can't expect our listener to set this
				this.severityLevels.put(preferenceKey, workspacePreference);
			}
			else {
				combo.select(convertPreferenceValueToComboIndex(defaultPreference));
			}
		}
	}
	
	// ********** OK/Revert/Apply behavior **********

	@Override
	public boolean performOk() {
		super.performOk();
		if (this.hasProjectSpecificPreferences != null) {
			IEclipsePreferences projectPreferences = getProjectPreferences(getProject());
			if (this.hasProjectSpecificPreferences.booleanValue()) {
				projectPreferences.putBoolean(JpaValidationPreferences.WORKSPACE_PREFERENCES_OVERRIDEN, true);
			}
			else {
				projectPreferences.remove(JpaValidationPreferences.WORKSPACE_PREFERENCES_OVERRIDEN);
			}
			JpaValidationPreferences.flush(projectPreferences);
		}
		for (String validationPreferenceKey : this.severityLevels.keySet()) {
			updatePreference(validationPreferenceKey, this.severityLevels.get(validationPreferenceKey));
		}
		try {
			// true=fork; false=uncancellable
			this.buildOkProgressMonitorDialog().run(true, false, this.buildOkRunnableWithProgress());
		}
		catch (InterruptedException ex) {
			return false;
		} 
		catch (InvocationTargetException ex) {
			throw new RuntimeException(ex.getTargetException());
		}

		return true;
	}

	protected void updatePreference(String preferenceKey, String value) {
		if (isProjectPreferencePage()) {
			JpaValidationPreferences.setProjectLevelProblemPreference(getProject(), preferenceKey, value);
		}
		else {
			JpaValidationPreferences.setWorkspaceLevelProblemPreference(preferenceKey, value);
		}
	}

	private IRunnableContext buildOkProgressMonitorDialog() {
		return new ProgressMonitorDialog(this.getShell());
	}

	private IRunnableWithProgress buildOkRunnableWithProgress() {
		return new IRunnableWithProgress() {
			public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
				IWorkspace ws = ResourcesPlugin.getWorkspace();
				try {
					// the build we execute in #performOk_() locks the workspace root,
					// so we need to use the workspace root as our scheduling rule here
					ws.run(
							JpaProblemSeveritiesPage.this.buildOkWorkspaceRunnable(),
							ws.getRoot(),
							IWorkspace.AVOID_UPDATE,
							monitor
					);
				}
				catch (CoreException ex) {
					throw new InvocationTargetException(ex);
				}
			}
		};
	}

	IWorkspaceRunnable buildOkWorkspaceRunnable() {
		return new IWorkspaceRunnable() {
			public void run(IProgressMonitor monitor) throws CoreException {
				JpaProblemSeveritiesPage.this.performOk_(monitor);
			}
		};
	}

	void performOk_(IProgressMonitor monitor) throws CoreException {
		//if project is null this is a workspace preference page
		if (this.getProject()==null) {
			JavaPlugin.getWorkspace().build(IncrementalProjectBuilder.FULL_BUILD, monitor);
		}
		else this.getProject().build(IncrementalProjectBuilder.FULL_BUILD, monitor);
	}

	@Override
	public void dispose() {
		storeSectionExpansionStates(getDialogPreferences());
		super.dispose();
	}

	protected IDialogSettings getDialogPreferences() {
		IDialogSettings rootSettings = JptJpaUiPlugin.instance().getDialogSettings();
		IDialogSettings settings = rootSettings.getSection(SETTINGS_SECTION_NAME);
		if (settings == null) {
			settings = rootSettings.addNewSection(SETTINGS_SECTION_NAME);
		}
		return settings;
	}

	protected void storeSectionExpansionStates(IDialogSettings settings) {
		for (int index = this.expandablePanes.size(); --index >= 0; ) {
			ExpandableComposite expandablePane = this.expandablePanes.get(index);
			settings.put(SETTINGS_EXPANDED + index, expandablePane.isExpanded());
		}
	}

}