/*
 * $Header: /home/cvspublic/jakarta-slide/src/stores/org/apache/slide/store/impl/rdbms/expression/RDBMSIsDefinedExpression.java,v 1.3 2004/07/28 09:34:09 ib Exp $
 * $Revision: 1.3 $
 * $Date: 2004/07/28 09:34:09 $
 *
 * ====================================================================
 *
 * Copyright 1999-2004 The Apache Software Foundation 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package org.apache.slide.store.impl.rdbms.expression;

import org.apache.slide.content.NodeProperty.NamespaceCache;
import org.apache.slide.search.basic.Literals;
import org.jdom.Element;

/**
 */
public class RDBMSIsDefinedExpression extends RDBMSCompareExpression {

    public RDBMSIsDefinedExpression(Element element, RDBMSQueryContext context) {
        super(element, context);
    }

    protected String compile() {
        Element property = (Element) _element.getChild(Literals.PROP, NamespaceCache.DEFAULT_NAMESPACE).getChildren().get(0);
        return "(p" + _tableIndex + ".PROPERTY_NAME = '" + property.getName() + "' AND " +
                "p" + _tableIndex + ".PROPERTY_NAMESPACE = '" + property.getNamespaceURI() + "')";
    }

}
