/*******************************************************************************
* Copyright (c) 1998, 2013 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.internal.jpa.parsing;
import org.eclipse.persistence.expressions.Expression;
import org.eclipse.persistence.internal.expressions.DateConstantExpression;
/**
* INTERNAL
* <p><b>Purpose</b>: Represent a Date, Time or TimeStamp literal
* <p><b>Responsibilities</b>:<ul>
* <li> Generate the correct expression for the temporal expression
* </ul>
*/
public class TemporalLiteralNode extends LiteralNode {
public enum TemporalType {DATE, TIME, TIMESTAMP}
private TemporalType type;
/**
* Return a new StringLiteralNode
*/
public TemporalLiteralNode(TemporalType type) {
super();
this.type = type;
}
/**
* Return a new StringLiteralNode with the internal string set to the
* passed value
*/
public TemporalLiteralNode(String theString, TemporalType type) {
this(type);
setLiteral(theString);
}
/**
* INTERNAL
* Generate the a new EclipseLink ConstantExpression for this node.
*/
public Expression generateExpression(GenerationContext context) {
DateConstantExpression whereClause = new DateConstantExpression(literal, context.getBaseExpression());
return whereClause;
}
/**
* INTERNAL
* Validate node and calculate its type.
*/
public void validate(ParseTreeContext context) {
TypeHelper typeHelper = context.getTypeHelper();
if (type == TemporalType.DATE){
setType(typeHelper.getSQLDateType());
} else if (type == TemporalType.TIME) {
setType(typeHelper.getTimeType());
} else if (type == TemporalType.TIMESTAMP){
setType(typeHelper.getTimestampType());
}
}
}