/*******************************************************************************
 * Copyright (c) 2010, 2011 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.core.internal.jpa1.context.java;

import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jpt.common.core.utility.TextRange;
import org.eclipse.jpt.jpa.core.context.ReadOnlyJoinColumn;
import org.eclipse.jpt.jpa.core.context.java.JavaJpaContextNode;
import org.eclipse.jpt.jpa.core.context.java.JavaReadOnlyJoinColumn;
import org.eclipse.jpt.jpa.core.context.java.JavaVirtualJoinColumn;
import org.eclipse.jpt.jpa.core.internal.context.MappingTools;
import org.eclipse.jpt.jpa.core.internal.context.NamedColumnTextRangeResolver;
import org.eclipse.jpt.jpa.core.internal.context.java.AbstractJavaVirtualBaseColumn;
import org.eclipse.jpt.jpa.core.internal.context.java.JavaJoinColumnTextRangeResolver;
import org.eclipse.jpt.jpa.db.Column;
import org.eclipse.jpt.jpa.db.Table;

/**
 * Java virtual join column
 */
public class GenericJavaVirtualJoinColumn
	extends AbstractJavaVirtualBaseColumn<JavaReadOnlyJoinColumn.Owner, ReadOnlyJoinColumn>
	implements JavaVirtualJoinColumn
{
	protected final ReadOnlyJoinColumn overriddenColumn;

	protected String specifiedReferencedColumnName;
	protected String defaultReferencedColumnName;


	public GenericJavaVirtualJoinColumn(JavaJpaContextNode parent, JavaReadOnlyJoinColumn.Owner owner, ReadOnlyJoinColumn overriddenColumn) {
		super(parent, owner);
		this.overriddenColumn = overriddenColumn;
	}


	// ********** synchronize/update **********

	@Override
	public void update() {
		super.update();

		this.setSpecifiedReferencedColumnName(this.buildSpecifiedReferencedColumnName());
		this.setDefaultReferencedColumnName(this.buildDefaultReferencedColumnName());
	}


	// ********** column **********

	@Override
	public ReadOnlyJoinColumn getOverriddenColumn() {
		return this.overriddenColumn;
	}

	public boolean isDefault() {
		return this.owner.joinColumnIsDefault(this);
	}


	// ********** referenced column name **********

	public String getReferencedColumnName() {
		return (this.specifiedReferencedColumnName != null) ? this.specifiedReferencedColumnName : this.defaultReferencedColumnName;
	}

	public String getSpecifiedReferencedColumnName() {
		return this.specifiedReferencedColumnName;
	}

	protected void setSpecifiedReferencedColumnName(String name) {
		String old = this.specifiedReferencedColumnName;
		this.specifiedReferencedColumnName = name;
		this.firePropertyChanged(SPECIFIED_REFERENCED_COLUMN_NAME_PROPERTY, old, name);
	}

	protected String buildSpecifiedReferencedColumnName() {
		return this.getOverriddenColumn().getSpecifiedReferencedColumnName();
	}

	public String getDefaultReferencedColumnName() {
		return this.defaultReferencedColumnName;
	}

	protected void setDefaultReferencedColumnName(String name) {
		String old = this.defaultReferencedColumnName;
		this.defaultReferencedColumnName = name;
		this.firePropertyChanged(DEFAULT_REFERENCED_COLUMN_NAME_PROPERTY, old, name);
	}

	protected String buildDefaultReferencedColumnName() {
		return MappingTools.buildJoinColumnDefaultReferencedColumnName(this.owner);
	}


	// ********** database stuff **********

	public Table getReferencedColumnDbTable() {
		return this.owner.getReferencedColumnDbTable();
	}

	protected Column getReferencedDbColumn() {
		Table table = this.getReferencedColumnDbTable();
		return (table == null) ? null : table.getColumnForIdentifier(this.getReferencedColumnName());
	}

	public boolean referencedColumnIsResolved() {
		return this.getReferencedDbColumn() != null;
	}


	// ********** misc **********

	public boolean isVirtual() {
		return true;
	}

	@Override
	protected String buildDefaultName() {
		return MappingTools.buildJoinColumnDefaultName(this, this.owner);
	}


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

	@Override
	protected NamedColumnTextRangeResolver buildTextRangeResolver(CompilationUnit astRoot) {
		return new JavaJoinColumnTextRangeResolver(this, astRoot);
	}

	public TextRange getReferencedColumnNameTextRange(CompilationUnit astRoot) {
		return this.getValidationTextRange(astRoot);
	}
}