bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/validation/JSPJavaValidator.java - sourceediting/webtools.sourceediting - Git at Google

 /*******************************************************************************
  * Copyright (c) 2006, 2008 IBM Corporation and others.
  * 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:
  *     IBM Corporation - initial API and implementation
  *
  *******************************************************************************/
 package org.eclipse.jst.jsp.core.internal.validation;

 import java.io.IOException;
 import java.util.List;

 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IMarker;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.ProjectScope;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.preferences.DefaultScope;
 import org.eclipse.core.runtime.preferences.IPreferencesService;
 import org.eclipse.core.runtime.preferences.IScopeContext;
 import org.eclipse.core.runtime.preferences.InstanceScope;
 import org.eclipse.jdt.core.compiler.IProblem;
 import org.eclipse.jface.text.IDocument;
 import org.eclipse.jface.text.Position;
 import org.eclipse.jst.jsp.core.internal.JSPCorePlugin;
 import org.eclipse.jst.jsp.core.internal.Logger;
 import org.eclipse.jst.jsp.core.internal.java.IJSPProblem;
 import org.eclipse.jst.jsp.core.internal.java.IJSPTranslation;
 import org.eclipse.jst.jsp.core.internal.java.JSPTranslation;
 import org.eclipse.jst.jsp.core.internal.java.JSPTranslationAdapter;
 import org.eclipse.jst.jsp.core.internal.java.JSPTranslationExtension;
 import org.eclipse.jst.jsp.core.internal.modelhandler.ModelHandlerForJSP;
 import org.eclipse.jst.jsp.core.internal.preferences.JSPCorePreferenceNames;
 import org.eclipse.jst.jsp.core.internal.regions.DOMJSPRegionContexts;
 import org.eclipse.wst.sse.core.StructuredModelManager;
 import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;
 import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
 import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion;
 import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion;
 import org.eclipse.wst.sse.core.internal.validate.ValidationMessage;
 import org.eclipse.wst.validation.internal.provisional.core.IMessage;
 import org.eclipse.wst.validation.internal.provisional.core.IReporter;
 import org.eclipse.wst.validation.internal.provisional.core.IValidator;
 import org.eclipse.wst.xml.core.internal.provisional.document.IDOMDocument;
 import org.eclipse.wst.xml.core.internal.provisional.document.IDOMModel;

 public class JSPJavaValidator extends JSPValidator {
 	private static final boolean DEBUG = Boolean.valueOf(Platform.getDebugOption("org.eclipse.jst.jsp.core/debug/jspvalidator")).booleanValue(); //$NON-NLS-1$
 	private IValidator fMessageOriginator;

 	private IPreferencesService fPreferencesService = Platform.getPreferencesService();
 	private static final String PREFERENCE_NODE_QUALIFIER = JSPCorePlugin.getDefault().getBundle().getSymbolicName();
 	private IScopeContext[] fScopes = null;

 	private static final boolean UPDATE_JAVA_TASKS = true;
 	private static final String JAVA_TASK_MARKER_TYPE = "org.eclipse.jdt.core.task"; //$NON-NLS-1$
 	private static final String[] DEPEND_ONs = new String[]{".classpath", ".project", ".settings/org.eclipse.jdt.core.prefs", ".settings/org.eclipse.jst.jsp.core.prefs", ".settings/org.eclipse.wst.common.project.facet.core.xml", ".settings/org.eclipse.wst.common.component"};

 	public JSPJavaValidator() {
 		this.fMessageOriginator = this;
 	}

 	public JSPJavaValidator(IValidator validator) {
 		this.fMessageOriginator = validator;
 	}

 	/**
 	 * Assumed the message offset is an indirect position. In other words, an
 	 * error from an included file.
 	 *
 	 * @param m
 	 * @param translation
 	 */
 	private void adjustIndirectPosition(IMessage m, IJSPTranslation translation) {

 		if (!(translation instanceof JSPTranslationExtension))
 			return;

 		IDocument jspDoc = ((JSPTranslationExtension) translation).getJspDocument();
 		if (!(jspDoc instanceof IStructuredDocument))
 			return;

 		IStructuredDocument sDoc = (IStructuredDocument) jspDoc;
 		IStructuredDocumentRegion[] regions = sDoc.getStructuredDocumentRegions(0, m.getOffset() + m.getLength());
 		// iterate backwards until you hit the include directive
 		for (int i = regions.length - 1; i >= 0; i--) {
 			IStructuredDocumentRegion region = regions[i];
 			if (region.getType() == DOMJSPRegionContexts.JSP_DIRECTIVE_NAME) {
 				if (getDirectiveName(region).equals("include")) { //$NON-NLS-1$
 					ITextRegion fileValueRegion = getAttributeValueRegion(region, "file"); //$NON-NLS-1$
 					if (fileValueRegion != null) {
 						m.setOffset(region.getStartOffset(fileValueRegion));
 						m.setLength(fileValueRegion.getTextLength());
 					}
 					else {
 						m.setOffset(region.getStartOffset());
 						m.setLength(region.getTextLength());
 					}
 					/**
 					 * Bug 219761 - Syntax error reported at wrong location
 					 * (don't forget to adjust the line number, too)
 					 */
 					m.setLineNo(sDoc.getLineOfOffset(m.getOffset()) + 1);
 					break;
 				}
 			}
 		}
 	}

 	/**
 	 * Creates an IMessage from asn IProblem
 	 *
 	 * @param problem
 	 * @param f
 	 * @param translation
 	 * @param structuredDoc
 	 * @return message representation of the problem, or null if it could not
 	 *         create one
 	 */
 	private IMessage createMessageFromProblem(IProblem problem, IFile f, IJSPTranslation translation, IStructuredDocument structuredDoc) {
 		int sev = -1;
 		int sourceStart = -1;
 		int sourceEnd = -1;

 		if (problem instanceof IJSPProblem) {
 			sourceStart = problem.getSourceStart();
 			sourceEnd = problem.getSourceEnd();
 			switch (((IJSPProblem) problem).getEID()) {
 				case IJSPProblem.TEIClassNotFound :
 					sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_TEI_CLASS_NOT_FOUND);
 					break;
 				case IJSPProblem.TEIValidationMessage :
 					sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_TEI_VALIDATION_MESSAGE);
 					break;
 				case IJSPProblem.TEIClassNotInstantiated :
 					sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_TEI_CLASS_NOT_INSTANTIATED);
 					break;
 				case IJSPProblem.TEIClassMisc :
 					sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_TEI_CLASS_RUNTIME_EXCEPTION);
 					break;
 				case IJSPProblem.TagClassNotFound :
 					sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_TAG_HANDLER_CLASS_NOT_FOUND);
 					break;
 				case IJSPProblem.UseBeanInvalidID :
 					sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_USEBEAN_INVALID_ID);
 					break;
 				case IJSPProblem.UseBeanMissingTypeInfo :
 					sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_USBEAN_MISSING_TYPE_INFO);
 					break;
 				case IJSPProblem.UseBeanAmbiguousType :
 					sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_USEBEAN_AMBIGUOUS_TYPE_INFO);
 					break;
 				default :
 					sev = problem.isError() ? IMessage.HIGH_SEVERITY : (problem.isWarning() ? IMessage.NORMAL_SEVERITY : ValidationMessage.IGNORE);

 			}
 		}
 		else {
 			sourceStart = translation.getJspOffset(problem.getSourceStart());
 			sourceEnd = translation.getJspOffset(problem.getSourceEnd());
 			switch (problem.getID()) {
 				case IProblem.LocalVariableIsNeverUsed : {
 					sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_JAVA_LOCAL_VARIABLE_NEVER_USED);
 				}
 					break;
 				case IProblem.NullLocalVariableReference : {
 					sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_JAVA_NULL_LOCAL_VARIABLE_REFERENCE);
 				}
 					break;
 				case IProblem.ArgumentIsNeverUsed : {
 					sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_JAVA_ARGUMENT_IS_NEVER_USED);
 				}
 					break;
 				case IProblem.PotentialNullLocalVariableReference : {
 					sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_JAVA_POTENTIAL_NULL_LOCAL_VARIABLE_REFERENCE);
 				}
 					break;
 				case IProblem.UnusedImport : {
 					sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_JAVA_UNUSED_IMPORT);
 				}
 					break;
 				case IProblem.UnusedPrivateField:
 				case IProblem.MissingSerialVersion : {
 					// JSP files don't get serialized...right?
 					sev = ValidationMessage.IGNORE;
 				}
 				break;

 				default : {
 					if (problem.isError()) {
 						sev = IMessage.HIGH_SEVERITY;
 					}
 					else if (problem.isWarning()) {
 						sev = IMessage.NORMAL_SEVERITY;
 					}
 					else {
 						sev = IMessage.LOW_SEVERITY;
 					}
 				}
 					if (sev == ValidationMessage.IGNORE) {
 						return null;
 					}

 					/* problems without JSP positions are in generated code */
 					if (sourceStart == -1) {
 						int problemID = problem.getID();
 						/*
 						 * Quoting IProblem doc: "When a problem is tagged as
 						 * Internal, it means that no change other than a
 						 * local source code change can fix the corresponding
 						 * problem." Assuming that our generated code is
 						 * correct, that should reduce the reported problems
 						 * to those the user can correct.
 						 */
 						if (((problemID & IProblem.Internal) != 0) && ((problemID & IProblem.Syntax) != 0) && translation instanceof JSPTranslation) {
 							// Attach to the last code scripting section
 							JSPTranslation jspTranslation = ((JSPTranslation) translation);
 							Position[] jspPositions = (Position[]) jspTranslation.getJsp2JavaMap().keySet().toArray(new Position[jspTranslation.getJsp2JavaMap().size()]);
 							for (int i = 0; i < jspPositions.length; i++) {
 								sourceStart = Math.max(sourceStart, jspPositions[i].getOffset());
 							}
 							IMessage m = new LocalizedMessage(sev, problem.getMessage(), f);
 							m.setOffset(sourceStart);
 							m.setLength(1);
 							return m;
 						}
 						else {
 							return null;
 						}
 					}
 			}
 		}
 		if (sev == ValidationMessage.IGNORE) {
 			return null;
 		}

 		// line number for marker starts @ 1
 		// line number from document starts @ 0
 		int lineNo = structuredDoc.getLineOfOffset(sourceStart) + 1;

 		IMessage m = new LocalizedMessage(sev, problem.getMessage(), f);

 		m.setLineNo(lineNo);
 		m.setOffset(sourceStart);
 		m.setLength(sourceEnd - sourceStart + 1);

 		// need additional adjustment for problems from
 		// indirect (included) files
 		// https://bugs.eclipse.org/bugs/show_bug.cgi?id=119633
 		if (translation.isIndirect(problem.getSourceStart())) {
 			adjustIndirectPosition(m, translation);
 		}

 		return m;
 	}

 	int getMessageSeverity(String key) {
 		int sev = fPreferencesService.getInt(PREFERENCE_NODE_QUALIFIER, key, IMessage.NORMAL_SEVERITY, fScopes);
 		switch (sev) {
 			case ValidationMessage.ERROR :
 				return IMessage.HIGH_SEVERITY;
 			case ValidationMessage.WARNING :
 				return IMessage.NORMAL_SEVERITY;
 			case ValidationMessage.INFORMATION :
 				return IMessage.LOW_SEVERITY;
 			case ValidationMessage.IGNORE :
 				return ValidationMessage.IGNORE;
 		}
 		return IMessage.NORMAL_SEVERITY;
 	}

 	private void loadPreferences(IFile file) {
 		fScopes = new IScopeContext[]{new InstanceScope(), new DefaultScope()};

 		if (file != null && file.isAccessible()) {
 			ProjectScope projectScope = new ProjectScope(file.getProject());
 			if (projectScope.getNode(PREFERENCE_NODE_QUALIFIER).getBoolean(JSPCorePreferenceNames.VALIDATION_USE_PROJECT_SETTINGS, false)) {
 				fScopes = new IScopeContext[]{projectScope, new InstanceScope(), new DefaultScope()};
 			}
 		}
 	}

 	void performValidation(IFile f, IReporter reporter, IStructuredModel model) {
 		for (int i = 0; i < DEPEND_ONs.length; i++) {
 			addDependsOn(f.getProject().getFile(DEPEND_ONs[i]));
 		}
 		if (model instanceof IDOMModel) {
 			IDOMModel domModel = (IDOMModel) model;
 			ModelHandlerForJSP.ensureTranslationAdapterFactory(domModel);

 			IDOMDocument xmlDoc = domModel.getDocument();
 			JSPTranslationAdapter translationAdapter = (JSPTranslationAdapter) xmlDoc.getAdapterFor(IJSPTranslation.class);
 			IJSPTranslation translation = translationAdapter.getJSPTranslation();

 			if (!reporter.isCancelled()) {
 				loadPreferences(f);

 				// only update task markers if the model is the same as what's on disk
 				boolean updateJavaTasks = UPDATE_JAVA_TASKS && !domModel.isDirty() && f != null && f.isAccessible();
 				if (updateJavaTasks) {
 					// remove old Java task markers
 					try {
 						IMarker[] foundMarkers = f.findMarkers(JAVA_TASK_MARKER_TYPE, true, IResource.DEPTH_ONE);
 						for (int i = 0; i < foundMarkers.length; i++) {
 							foundMarkers[i].delete();
 						}
 					}
 					catch (CoreException e) {
 						Logger.logException(e);
 					}
 				}

 				translation.setProblemCollectingActive(true);
 				translation.reconcileCompilationUnit();
 				List problems = translation.getProblems();
 				// add new messages
 				for (int i = 0; i < problems.size() && !reporter.isCancelled(); i++) {
 					IProblem problem = (IProblem) problems.get(i);
 					IMessage m = createMessageFromProblem(problem, f, translation, domModel.getStructuredDocument());
 					if (m != null) {
 						if (problem.getID() == IProblem.Task) {
 							if (updateJavaTasks) {
 								// add new Java task marker
 								try {
 									IMarker task = f.createMarker(JAVA_TASK_MARKER_TYPE);
 									task.setAttribute(IMarker.LINE_NUMBER, new Integer(m.getLineNumber()));
 									task.setAttribute(IMarker.CHAR_START, new Integer(m.getOffset()));
 									task.setAttribute(IMarker.CHAR_END, new Integer(m.getOffset() + m.getLength()));
 									task.setAttribute(IMarker.MESSAGE, m.getText());
 									task.setAttribute(IMarker.USER_EDITABLE, Boolean.FALSE);

 									switch (m.getSeverity()) {
 										case IMessage.HIGH_SEVERITY: {
 											task.setAttribute(IMarker.PRIORITY, new Integer(IMarker.PRIORITY_HIGH));
 											task.setAttribute(IMarker.SEVERITY, new Integer(IMarker.SEVERITY_ERROR));
 										}
 											break;
 										case IMessage.LOW_SEVERITY : {
 											task.setAttribute(IMarker.PRIORITY, new Integer(IMarker.PRIORITY_LOW));
 											task.setAttribute(IMarker.SEVERITY, new Integer(IMarker.SEVERITY_INFO));
 										}
 											break;
 										default : {
 											task.setAttribute(IMarker.PRIORITY, new Integer(IMarker.PRIORITY_NORMAL));
 											task.setAttribute(IMarker.SEVERITY, new Integer(IMarker.SEVERITY_WARNING));
 										}
 									}
 								}
 								catch (CoreException e) {
 									Logger.logException(e);
 								}
 							}
 						}
 						else {
 							reporter.addMessage(fMessageOriginator, m);
 						}
 					}
 				}
 			}
 		}
 		unloadPreferences();
 	}

 	private void unloadPreferences() {
 		fScopes = null;
 	}

 	/**
 	 * Validate one file. It's assumed that the file has JSP content type.
 	 *
 	 * @param f
 	 * @param reporter
 	 */
 	protected void validateFile(IFile f, IReporter reporter) {
 		if (DEBUG) {
 			Logger.log(Logger.INFO, getClass().getName() + " validating: " + f); //$NON-NLS-1$
 		}

 		IStructuredModel model = null;
 		try {
 			// get jsp model, get tranlsation
 			model = StructuredModelManager.getModelManager().getModelForRead(f);
 			if (!reporter.isCancelled() && model != null) {
 				for (int i = 0; i < DEPEND_ONs.length; i++) {
 					addDependsOn(f.getProject().getFile(DEPEND_ONs[i]));
 				}
 				// get jsp model, get translation
 				if (model instanceof IDOMModel) {
 					reporter.removeAllMessages(fMessageOriginator, f);
 					performValidation(f, reporter, model);
 				}
 			}
 		}
 		catch (IOException e) {
 			Logger.logException(e);
 		}
 		catch (CoreException e) {
 			Logger.logException(e);
 		}
 		finally {
 			if (model != null)
 				model.releaseFromRead();
 		}
 	}

 	/**
 	 * Record that the currently validating resource depends on the given
 	 * file. Only possible during batch (not source) validation.
 	 *
 	 * @param file
 	 */
 	private void addDependsOn(IFile file) {
 		if (fMessageOriginator instanceof JSPBatchValidator) {
 			((JSPBatchValidator) fMessageOriginator).addDependsOn(file);
 		}
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2006, 2008 IBM Corporation and others.
	* 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:
	* IBM Corporation - initial API and implementation
	*
	*******************************************************************************/
	package org.eclipse.jst.jsp.core.internal.validation;

	import java.io.IOException;
	import java.util.List;

	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IMarker;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.resources.ProjectScope;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.core.runtime.preferences.DefaultScope;
	import org.eclipse.core.runtime.preferences.IPreferencesService;
	import org.eclipse.core.runtime.preferences.IScopeContext;
	import org.eclipse.core.runtime.preferences.InstanceScope;
	import org.eclipse.jdt.core.compiler.IProblem;
	import org.eclipse.jface.text.IDocument;
	import org.eclipse.jface.text.Position;
	import org.eclipse.jst.jsp.core.internal.JSPCorePlugin;
	import org.eclipse.jst.jsp.core.internal.Logger;
	import org.eclipse.jst.jsp.core.internal.java.IJSPProblem;
	import org.eclipse.jst.jsp.core.internal.java.IJSPTranslation;
	import org.eclipse.jst.jsp.core.internal.java.JSPTranslation;
	import org.eclipse.jst.jsp.core.internal.java.JSPTranslationAdapter;
	import org.eclipse.jst.jsp.core.internal.java.JSPTranslationExtension;
	import org.eclipse.jst.jsp.core.internal.modelhandler.ModelHandlerForJSP;
	import org.eclipse.jst.jsp.core.internal.preferences.JSPCorePreferenceNames;
	import org.eclipse.jst.jsp.core.internal.regions.DOMJSPRegionContexts;
	import org.eclipse.wst.sse.core.StructuredModelManager;
	import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;
	import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
	import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion;
	import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion;
	import org.eclipse.wst.sse.core.internal.validate.ValidationMessage;
	import org.eclipse.wst.validation.internal.provisional.core.IMessage;
	import org.eclipse.wst.validation.internal.provisional.core.IReporter;
	import org.eclipse.wst.validation.internal.provisional.core.IValidator;
	import org.eclipse.wst.xml.core.internal.provisional.document.IDOMDocument;
	import org.eclipse.wst.xml.core.internal.provisional.document.IDOMModel;

	public class JSPJavaValidator extends JSPValidator {
	private static final boolean DEBUG = Boolean.valueOf(Platform.getDebugOption("org.eclipse.jst.jsp.core/debug/jspvalidator")).booleanValue(); //$NON-NLS-1$
	private IValidator fMessageOriginator;

	private IPreferencesService fPreferencesService = Platform.getPreferencesService();
	private static final String PREFERENCE_NODE_QUALIFIER = JSPCorePlugin.getDefault().getBundle().getSymbolicName();
	private IScopeContext[] fScopes = null;

	private static final boolean UPDATE_JAVA_TASKS = true;
	private static final String JAVA_TASK_MARKER_TYPE = "org.eclipse.jdt.core.task"; //$NON-NLS-1$
	private static final String[] DEPEND_ONs = new String[]{".classpath", ".project", ".settings/org.eclipse.jdt.core.prefs", ".settings/org.eclipse.jst.jsp.core.prefs", ".settings/org.eclipse.wst.common.project.facet.core.xml", ".settings/org.eclipse.wst.common.component"};

	public JSPJavaValidator() {
	this.fMessageOriginator = this;
	}

	public JSPJavaValidator(IValidator validator) {
	this.fMessageOriginator = validator;
	}

	/**
	* Assumed the message offset is an indirect position. In other words, an
	* error from an included file.
	*
	* @param m
	* @param translation
	*/
	private void adjustIndirectPosition(IMessage m, IJSPTranslation translation) {

	if (!(translation instanceof JSPTranslationExtension))
	return;

	IDocument jspDoc = ((JSPTranslationExtension) translation).getJspDocument();
	if (!(jspDoc instanceof IStructuredDocument))
	return;

	IStructuredDocument sDoc = (IStructuredDocument) jspDoc;
	IStructuredDocumentRegion[] regions = sDoc.getStructuredDocumentRegions(0, m.getOffset() + m.getLength());
	// iterate backwards until you hit the include directive
	for (int i = regions.length - 1; i >= 0; i--) {
	IStructuredDocumentRegion region = regions[i];
	if (region.getType() == DOMJSPRegionContexts.JSP_DIRECTIVE_NAME) {
	if (getDirectiveName(region).equals("include")) { //$NON-NLS-1$
	ITextRegion fileValueRegion = getAttributeValueRegion(region, "file"); //$NON-NLS-1$
	if (fileValueRegion != null) {
	m.setOffset(region.getStartOffset(fileValueRegion));
	m.setLength(fileValueRegion.getTextLength());
	}
	else {
	m.setOffset(region.getStartOffset());
	m.setLength(region.getTextLength());
	}
	/**
	* Bug 219761 - Syntax error reported at wrong location
	* (don't forget to adjust the line number, too)
	*/
	m.setLineNo(sDoc.getLineOfOffset(m.getOffset()) + 1);
	break;
	}
	}
	}
	}

	/**
	* Creates an IMessage from asn IProblem
	*
	* @param problem
	* @param f
	* @param translation
	* @param structuredDoc
	* @return message representation of the problem, or null if it could not
	* create one
	*/
	private IMessage createMessageFromProblem(IProblem problem, IFile f, IJSPTranslation translation, IStructuredDocument structuredDoc) {
	int sev = -1;
	int sourceStart = -1;
	int sourceEnd = -1;

	if (problem instanceof IJSPProblem) {
	sourceStart = problem.getSourceStart();
	sourceEnd = problem.getSourceEnd();
	switch (((IJSPProblem) problem).getEID()) {
	case IJSPProblem.TEIClassNotFound :
	sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_TEI_CLASS_NOT_FOUND);
	break;
	case IJSPProblem.TEIValidationMessage :
	sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_TEI_VALIDATION_MESSAGE);
	break;
	case IJSPProblem.TEIClassNotInstantiated :
	sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_TEI_CLASS_NOT_INSTANTIATED);
	break;
	case IJSPProblem.TEIClassMisc :
	sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_TEI_CLASS_RUNTIME_EXCEPTION);
	break;
	case IJSPProblem.TagClassNotFound :
	sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_TAG_HANDLER_CLASS_NOT_FOUND);
	break;
	case IJSPProblem.UseBeanInvalidID :
	sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_USEBEAN_INVALID_ID);
	break;
	case IJSPProblem.UseBeanMissingTypeInfo :
	sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_USBEAN_MISSING_TYPE_INFO);
	break;
	case IJSPProblem.UseBeanAmbiguousType :
	sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_TRANSLATION_USEBEAN_AMBIGUOUS_TYPE_INFO);
	break;
	default :
	sev = problem.isError() ? IMessage.HIGH_SEVERITY : (problem.isWarning() ? IMessage.NORMAL_SEVERITY : ValidationMessage.IGNORE);

	}
	}
	else {
	sourceStart = translation.getJspOffset(problem.getSourceStart());
	sourceEnd = translation.getJspOffset(problem.getSourceEnd());
	switch (problem.getID()) {
	case IProblem.LocalVariableIsNeverUsed : {
	sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_JAVA_LOCAL_VARIABLE_NEVER_USED);
	}
	break;
	case IProblem.NullLocalVariableReference : {
	sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_JAVA_NULL_LOCAL_VARIABLE_REFERENCE);
	}
	break;
	case IProblem.ArgumentIsNeverUsed : {
	sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_JAVA_ARGUMENT_IS_NEVER_USED);
	}
	break;
	case IProblem.PotentialNullLocalVariableReference : {
	sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_JAVA_POTENTIAL_NULL_LOCAL_VARIABLE_REFERENCE);
	}
	break;
	case IProblem.UnusedImport : {
	sev = getMessageSeverity(JSPCorePreferenceNames.VALIDATION_JAVA_UNUSED_IMPORT);
	}
	break;
	case IProblem.UnusedPrivateField:
	case IProblem.MissingSerialVersion : {
	// JSP files don't get serialized...right?
	sev = ValidationMessage.IGNORE;
	}
	break;

	default : {
	if (problem.isError()) {
	sev = IMessage.HIGH_SEVERITY;
	}
	else if (problem.isWarning()) {
	sev = IMessage.NORMAL_SEVERITY;
	}
	else {
	sev = IMessage.LOW_SEVERITY;
	}
	}
	if (sev == ValidationMessage.IGNORE) {
	return null;
	}

	/* problems without JSP positions are in generated code */
	if (sourceStart == -1) {
	int problemID = problem.getID();
	/*
	* Quoting IProblem doc: "When a problem is tagged as
	* Internal, it means that no change other than a
	* local source code change can fix the corresponding
	* problem." Assuming that our generated code is
	* correct, that should reduce the reported problems
	* to those the user can correct.
	*/
	if (((problemID & IProblem.Internal) != 0) && ((problemID & IProblem.Syntax) != 0) && translation instanceof JSPTranslation) {
	// Attach to the last code scripting section
	JSPTranslation jspTranslation = ((JSPTranslation) translation);
	Position[] jspPositions = (Position[]) jspTranslation.getJsp2JavaMap().keySet().toArray(new Position[jspTranslation.getJsp2JavaMap().size()]);
	for (int i = 0; i < jspPositions.length; i++) {
	sourceStart = Math.max(sourceStart, jspPositions[i].getOffset());
	}
	IMessage m = new LocalizedMessage(sev, problem.getMessage(), f);
	m.setOffset(sourceStart);
	m.setLength(1);
	return m;
	}
	else {
	return null;
	}
	}
	}
	}
	if (sev == ValidationMessage.IGNORE) {
	return null;
	}

	// line number for marker starts @ 1
	// line number from document starts @ 0
	int lineNo = structuredDoc.getLineOfOffset(sourceStart) + 1;

	IMessage m = new LocalizedMessage(sev, problem.getMessage(), f);

	m.setLineNo(lineNo);
	m.setOffset(sourceStart);
	m.setLength(sourceEnd - sourceStart + 1);

	// need additional adjustment for problems from
	// indirect (included) files
	// https://bugs.eclipse.org/bugs/show_bug.cgi?id=119633
	if (translation.isIndirect(problem.getSourceStart())) {
	adjustIndirectPosition(m, translation);
	}

	return m;
	}

	int getMessageSeverity(String key) {
	int sev = fPreferencesService.getInt(PREFERENCE_NODE_QUALIFIER, key, IMessage.NORMAL_SEVERITY, fScopes);
	switch (sev) {
	case ValidationMessage.ERROR :
	return IMessage.HIGH_SEVERITY;
	case ValidationMessage.WARNING :
	return IMessage.NORMAL_SEVERITY;
	case ValidationMessage.INFORMATION :
	return IMessage.LOW_SEVERITY;
	case ValidationMessage.IGNORE :
	return ValidationMessage.IGNORE;
	}
	return IMessage.NORMAL_SEVERITY;
	}

	private void loadPreferences(IFile file) {
	fScopes = new IScopeContext[]{new InstanceScope(), new DefaultScope()};

	if (file != null && file.isAccessible()) {
	ProjectScope projectScope = new ProjectScope(file.getProject());
	if (projectScope.getNode(PREFERENCE_NODE_QUALIFIER).getBoolean(JSPCorePreferenceNames.VALIDATION_USE_PROJECT_SETTINGS, false)) {
	fScopes = new IScopeContext[]{projectScope, new InstanceScope(), new DefaultScope()};
	}
	}
	}

	void performValidation(IFile f, IReporter reporter, IStructuredModel model) {
	for (int i = 0; i < DEPEND_ONs.length; i++) {
	addDependsOn(f.getProject().getFile(DEPEND_ONs[i]));
	}
	if (model instanceof IDOMModel) {
	IDOMModel domModel = (IDOMModel) model;
	ModelHandlerForJSP.ensureTranslationAdapterFactory(domModel);

	IDOMDocument xmlDoc = domModel.getDocument();
	JSPTranslationAdapter translationAdapter = (JSPTranslationAdapter) xmlDoc.getAdapterFor(IJSPTranslation.class);
	IJSPTranslation translation = translationAdapter.getJSPTranslation();

	if (!reporter.isCancelled()) {
	loadPreferences(f);

	// only update task markers if the model is the same as what's on disk
	boolean updateJavaTasks = UPDATE_JAVA_TASKS && !domModel.isDirty() && f != null && f.isAccessible();
	if (updateJavaTasks) {
	// remove old Java task markers
	try {
	IMarker[] foundMarkers = f.findMarkers(JAVA_TASK_MARKER_TYPE, true, IResource.DEPTH_ONE);
	for (int i = 0; i < foundMarkers.length; i++) {
	foundMarkers[i].delete();
	}
	}
	catch (CoreException e) {
	Logger.logException(e);
	}
	}

	translation.setProblemCollectingActive(true);
	translation.reconcileCompilationUnit();
	List problems = translation.getProblems();
	// add new messages
	for (int i = 0; i < problems.size() && !reporter.isCancelled(); i++) {
	IProblem problem = (IProblem) problems.get(i);
	IMessage m = createMessageFromProblem(problem, f, translation, domModel.getStructuredDocument());
	if (m != null) {
	if (problem.getID() == IProblem.Task) {
	if (updateJavaTasks) {
	// add new Java task marker
	try {
	IMarker task = f.createMarker(JAVA_TASK_MARKER_TYPE);
	task.setAttribute(IMarker.LINE_NUMBER, new Integer(m.getLineNumber()));
	task.setAttribute(IMarker.CHAR_START, new Integer(m.getOffset()));
	task.setAttribute(IMarker.CHAR_END, new Integer(m.getOffset() + m.getLength()));
	task.setAttribute(IMarker.MESSAGE, m.getText());
	task.setAttribute(IMarker.USER_EDITABLE, Boolean.FALSE);

	switch (m.getSeverity()) {
	case IMessage.HIGH_SEVERITY: {
	task.setAttribute(IMarker.PRIORITY, new Integer(IMarker.PRIORITY_HIGH));
	task.setAttribute(IMarker.SEVERITY, new Integer(IMarker.SEVERITY_ERROR));
	}
	break;
	case IMessage.LOW_SEVERITY : {
	task.setAttribute(IMarker.PRIORITY, new Integer(IMarker.PRIORITY_LOW));
	task.setAttribute(IMarker.SEVERITY, new Integer(IMarker.SEVERITY_INFO));
	}
	break;
	default : {
	task.setAttribute(IMarker.PRIORITY, new Integer(IMarker.PRIORITY_NORMAL));
	task.setAttribute(IMarker.SEVERITY, new Integer(IMarker.SEVERITY_WARNING));
	}
	}
	}
	catch (CoreException e) {
	Logger.logException(e);
	}
	}
	}
	else {
	reporter.addMessage(fMessageOriginator, m);
	}
	}
	}
	}
	}
	unloadPreferences();
	}

	private void unloadPreferences() {
	fScopes = null;
	}

	/**
	* Validate one file. It's assumed that the file has JSP content type.
	*
	* @param f
	* @param reporter
	*/
	protected void validateFile(IFile f, IReporter reporter) {
	if (DEBUG) {
	Logger.log(Logger.INFO, getClass().getName() + " validating: " + f); //$NON-NLS-1$
	}

	IStructuredModel model = null;
	try {
	// get jsp model, get tranlsation
	model = StructuredModelManager.getModelManager().getModelForRead(f);
	if (!reporter.isCancelled() && model != null) {
	for (int i = 0; i < DEPEND_ONs.length; i++) {
	addDependsOn(f.getProject().getFile(DEPEND_ONs[i]));
	}
	// get jsp model, get translation
	if (model instanceof IDOMModel) {
	reporter.removeAllMessages(fMessageOriginator, f);
	performValidation(f, reporter, model);
	}
	}
	}
	catch (IOException e) {
	Logger.logException(e);
	}
	catch (CoreException e) {
	Logger.logException(e);
	}
	finally {
	if (model != null)
	model.releaseFromRead();
	}
	}

	/**
	* Record that the currently validating resource depends on the given
	* file. Only possible during batch (not source) validation.
	*
	* @param file
	*/
	private void addDependsOn(IFile file) {
	if (fMessageOriginator instanceof JSPBatchValidator) {
	((JSPBatchValidator) fMessageOriginator).addDependsOn(file);
	}
	}

	}