/*******************************************************************************
 * Copyright (c) 2007, 2008 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.core.internal.context.java;

import java.util.Iterator;
import java.util.List;
import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jpt.core.context.AttributeOverride;
import org.eclipse.jpt.core.context.ColumnMapping;
import org.eclipse.jpt.core.context.TypeMapping;
import org.eclipse.jpt.core.context.java.JavaAttributeOverride;
import org.eclipse.jpt.core.context.java.JavaColumn;
import org.eclipse.jpt.core.context.java.JavaJpaContextNode;
import org.eclipse.jpt.core.internal.validation.DefaultJpaValidationMessages;
import org.eclipse.jpt.core.internal.validation.JpaValidationMessages;
import org.eclipse.jpt.core.resource.java.AttributeOverrideAnnotation;
import org.eclipse.jpt.core.resource.java.ColumnAnnotation;
import org.eclipse.jpt.db.Table;
import org.eclipse.jpt.utility.Filter;
import org.eclipse.wst.validation.internal.provisional.core.IMessage;


public class GenericJavaAttributeOverride extends AbstractJavaOverride
	implements JavaAttributeOverride
{

	protected final JavaColumn column;
	

	public GenericJavaAttributeOverride(JavaJpaContextNode parent, AttributeOverride.Owner owner) {
		super(parent, owner);
		this.column = getJpaFactory().buildJavaColumn(this, this);
	}
	
	@Override
	public JavaAttributeOverride setVirtual(boolean virtual) {
		return (JavaAttributeOverride) super.setVirtual(virtual);
	}
	
	@Override
	protected AttributeOverrideAnnotation getResourceOverride() {
		return (AttributeOverrideAnnotation) super.getResourceOverride();
	}
	
	@Override
	public AttributeOverride.Owner getOwner() {
		return (AttributeOverride.Owner) super.getOwner();
	}
	
	public ColumnAnnotation getResourceColumn() {
		return this.getResourceOverride().getNonNullColumn();
	}

	public String getDefaultColumnName() {
		ColumnMapping columnMapping = getColumnMapping();
		if (columnMapping == null) {
			return null;
		}
		return columnMapping.getColumn().getName();
	}
	
	public String getDefaultTableName() {
		ColumnMapping columnMapping = getColumnMapping();
		if (columnMapping == null) {
			return null;
		}
		String tableName = columnMapping.getColumn().getSpecifiedTable();
		if (tableName != null) {
			return tableName;
		}
		return getOwner().getTypeMapping().getPrimaryTableName();
	}
	
	protected ColumnMapping getColumnMapping() {
		return getOwner().getColumnMapping(getName());
	}

	//************* IColumn.Owner implementation **************
	public TypeMapping getTypeMapping() {
		return this.getOwner().getTypeMapping();
	}
	
	public Table getDbTable(String tableName) {
		return this.getTypeMapping().getDbTable(tableName);
	}
	
	//************* IAttributeOverride implementation **************
	
	public JavaColumn getColumn() {
		return this.column;
	}

	//************* JavaOverride implementation **************
	
	@Override
	protected Iterator<String> candidateNames() {
		return this.getOwner().getTypeMapping().allOverridableAttributeNames();
	}
	
	//************* java resource model -> java context model **************	
	public void initialize(AttributeOverrideAnnotation attributeOverrideResource) {
		super.initialize(attributeOverrideResource);
		this.column.initialize(this.getResourceColumn());
	}

	public void update(AttributeOverrideAnnotation attributeOverrideResource) {
		super.update(attributeOverrideResource);
		this.column.update(this.getResourceColumn());		
	}

	@Override
	public Iterator<String> javaCompletionProposals(int pos, Filter<String> filter, CompilationUnit astRoot) {
		Iterator<String> result = super.javaCompletionProposals(pos, filter, astRoot);
		if (result != null) {
			return result;
		}
		result = this.getColumn().javaCompletionProposals(pos, filter, astRoot);
		if (result != null) {
			return result;
		}
		return null;
	}


	// ********** validation **********

	@Override
	public void validate(List<IMessage> messages, CompilationUnit astRoot) {
		super.validate(messages, astRoot);
		if (this.connectionProfileIsActive()) {
			this.validateColumn(messages, astRoot);
		}
	}

	protected void validateColumn(List<IMessage> messages, CompilationUnit astRoot) {
		String tableName = this.column.getTable();
		if (this.getTypeMapping().tableNameIsInvalid(tableName)) {
			if (this.isVirtual()) {
				messages.add(
					DefaultJpaValidationMessages.buildMessage(
						IMessage.HIGH_SEVERITY,
						JpaValidationMessages.VIRTUAL_ATTRIBUTE_OVERRIDE_COLUMN_UNRESOLVED_TABLE,
						new String[] {this.getName(), tableName, this.column.getName()},
						this.column,
						this.column.getTableTextRange(astRoot)
					)
				);
			} else {
				messages.add(
					DefaultJpaValidationMessages.buildMessage(
						IMessage.HIGH_SEVERITY,
						JpaValidationMessages.COLUMN_UNRESOLVED_TABLE,
						new String[] {tableName, this.column.getName()}, 
						this.column,
						this.column.getTableTextRange(astRoot)
					)
				);
			}
			return;
		}
		
		if ( ! this.column.isResolved()) {
			if (this.isVirtual()) {
				messages.add(
					DefaultJpaValidationMessages.buildMessage(
						IMessage.HIGH_SEVERITY,
						JpaValidationMessages.VIRTUAL_ATTRIBUTE_OVERRIDE_COLUMN_UNRESOLVED_NAME,
						new String[] {this.getName(), this.column.getName()},
						this.column,
						this.column.getNameTextRange(astRoot)
					)
				);
			} else {
				messages.add(
					DefaultJpaValidationMessages.buildMessage(
						IMessage.HIGH_SEVERITY,
						JpaValidationMessages.COLUMN_UNRESOLVED_NAME,
						new String[] {this.column.getName()},
						this.column,
						this.column.getNameTextRange(astRoot)
					)
				);
			}
		}
	}

}