foundation/org.eclipse.persistence.core/src/org/eclipse/persistence/internal/expressions/DateConstantExpression.java

/*******************************************************************************
 * 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:
 *     tware - added as part of JPQL extensions for JPA 2.0
 ******************************************************************************/  
package org.eclipse.persistence.internal.expressions;

import org.eclipse.persistence.expressions.Expression;

/**
 * INTERNAL:
 * This expression represents a date represented in JDBC escape syntax, for instance, the String:
 * {d '1901-01-01'} can be used to represent a Date and use used only by the JPQL parser.
 * 
 * This is different from a ConstantExpression because this value is never converted with the conversion 
 * manager and is printed out as-is
 * 
 * The only validation for this type of expression will be from the JDBC driver.
 * 
 * @author tware
 *
 */
public class DateConstantExpression extends ConstantExpression {

    public DateConstantExpression() {
        super();
    }

    public DateConstantExpression(Object newValue, Expression baseExpression) {
        super(newValue, baseExpression);
    }
    
    /**
     * INTERNAL:
     * Used for debug printing.
     */
    public String descriptionOfNodeType() {
        return "DateConstant";
    }
    
    /**
     * INTERNAL:
     * Print SQL onto the stream, using the ExpressionPrinter for context
     */
    public void printSQL(ExpressionSQLPrinter printer) {
        printer.printString((String)value);
    }
    
}