001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements. See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership. The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the  "License");
007     * you may not use this file except in compliance with the License.
008     * You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    /*
019     * $Id: String.java 468655 2006-10-28 07:12:06Z minchau $
020     */
021    package org.apache.xpath.operations;
022    
023    import org.apache.xpath.objects.XObject;
024    import org.apache.xpath.objects.XString;
025    
026    /**
027     * The 'string()' operation expression executer.
028     */
029    public class String extends UnaryOperation
030    {
031        static final long serialVersionUID = 2973374377453022888L;
032    
033      /**
034       * Apply the operation to two operands, and return the result.
035       *
036       *
037       * @param right non-null reference to the evaluated right operand.
038       *
039       * @return non-null reference to the XObject that represents the result of the operation.
040       *
041       * @throws javax.xml.transform.TransformerException
042       */
043      public XObject operate(XObject right) throws javax.xml.transform.TransformerException
044      {
045        return (XString)right.xstr(); // semi-safe cast.
046      }
047    }