/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.mappingsmodel.query.relational;
import java.util.List;
import org.eclipse.persistence.tools.workbench.mappingsmodel.MWModel;
import org.eclipse.persistence.tools.workbench.utility.node.Node;
import org.eclipse.persistence.descriptors.ClassDescriptor;
import org.eclipse.persistence.expressions.Expression;
import org.eclipse.persistence.oxm.XMLDescriptor;
import org.eclipse.persistence.oxm.mappings.XMLCompositeObjectMapping;
import org.eclipse.persistence.queries.DatabaseQuery;
import org.eclipse.persistence.queries.ObjectLevelReadQuery;
/**
* This class holds on to the expression for queries which have expression format chosen
*/
public final class MWExpressionQueryFormat extends MWQueryFormat
{
//expression can never be null
private volatile MWCompoundExpression expression;
public final static String EXPRESSION_PROPERTY = "expression";
/**
* Default constructor - for TopLink use only.
*/
private MWExpressionQueryFormat()
{
super();
}
MWExpressionQueryFormat(MWRelationalSpecificQueryOptions parent)
{
super(parent);
}
protected void addChildrenTo(List children)
{
super.addChildrenTo(children);
children.add(expression);
}
/**
* initialize persistent state
*/
protected void initialize(Node modelObject)
{
super.initialize(modelObject);
expression = new MWCompoundExpression(this);
}
String getType() {
return MWRelationalQuery.EXPRESSION_FORMAT;
}
public MWCompoundExpression getExpression()
{
return expression;
}
public void setExpression(MWCompoundExpression expression)
{
MWCompoundExpression oldExpression = getExpression();
this.expression = expression;
firePropertyChanged(EXPRESSION_PROPERTY, oldExpression, getExpression());
}
public boolean orderingAttributesAllowed() {
return true;
}
public boolean batchReadAttributesAllowed() {
return true;
}
public boolean reportAttributesAllowed() {
return true;
}
public boolean groupingAtributesAllowed() {
return true;
}
public void toString(StringBuffer sb)
{
super.toString(sb);
sb.append(", expression = ");
sb.append(getExpression());
}
//persistence
public static XMLDescriptor buildDescriptor()
{
XMLDescriptor descriptor = new XMLDescriptor();
descriptor.setJavaClass(MWExpressionQueryFormat.class);
descriptor.getInheritancePolicy().setParentClass(MWQueryFormat.class);
// 1-1 to the compound expression
XMLCompositeObjectMapping expressionMapping = new XMLCompositeObjectMapping();
expressionMapping.setAttributeName("expression");
expressionMapping.setReferenceClass(MWCompoundExpression.class);
expressionMapping.setXPath("main-compound-expression");
descriptor.addMapping(expressionMapping);
return descriptor;
}
//Conversion methods
void convertToRuntime(DatabaseQuery runtimeQuery)
{
runtimeQuery.setSelectionCriteria(getExpression().buildRuntimeExpression(((ObjectLevelReadQuery)runtimeQuery).getExpressionBuilder()));
}
void convertFromRuntime(DatabaseQuery runtimeQuery)
{
Expression selectionCriteria = runtimeQuery.getSelectionCriteria();
if (selectionCriteria != null)
{
setExpression(MWCompoundExpression.convertFromRuntime(this, selectionCriteria));
}
}
}