/*******************************************************************************
* 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 org.eclipse.persistence.tools.workbench.mappingsmodel.MWModel;
import org.eclipse.persistence.tools.workbench.mappingsmodel.query.MWQuery;
import org.eclipse.persistence.tools.workbench.utility.ClassTools;
import org.eclipse.persistence.descriptors.ClassDescriptor;
import org.eclipse.persistence.descriptors.InheritancePolicy;
import org.eclipse.persistence.expressions.Expression;
import org.eclipse.persistence.expressions.ExpressionBuilder;
import org.eclipse.persistence.oxm.XMLDescriptor;
/**
* An argument is one side of a MWBasicExpression
*/
public abstract class MWArgument extends MWModel implements Undoable {
public final static String LITERAL_TYPE = "literal";
public final static String QUERY_KEY_TYPE = "queryKey";
public final static String PARAMETER_TYPE = "parameter";
/**
* Default constructor - for TopLink use only.
*/
protected MWArgument() {
super();
}
MWArgument(MWQueryableArgumentParent parent) {
super(parent);
}
protected MWQueryableArgumentParent getQueryableArgumentParent() {
return (MWQueryableArgumentParent) this.getParent();
}
public MWQuery getParentQuery() {
return getQueryableArgumentParent().getParentQuery();
}
public abstract String getType();
void recalculateQueryables()
{
}
public void operatorTypeChanged()
{
//Do nothing, this can be overridden if an argument type needs to do
//something based on the operator changing.
//MWLiteralArgument overrides this
}
//Persistence
public static XMLDescriptor buildDescriptor()
{
XMLDescriptor descriptor = new XMLDescriptor();
descriptor.setJavaClass(MWArgument.class);
//inheritance policy
org.eclipse.persistence.descriptors.InheritancePolicy ip = (org.eclipse.persistence.descriptors.InheritancePolicy)descriptor.getInheritancePolicy();
ip.setClassIndicatorFieldName("@type");
ip.readSubclassesOnQueries();
ip.addClassIndicator(MWLiteralArgument.class, "literal");
ip.addClassIndicator(MWQueryParameterArgument.class, "parm");
ip.addClassIndicator(MWQueryableArgument.class, "queryable");
ip.addClassIndicator(MWNullArgument.class, "null");
return descriptor;
}
//Conversion to Runtime
abstract Expression runtimeExpression(ExpressionBuilder builder);
}