1 /*

     2  * reserved comment block

     3  * DO NOT REMOVE OR ALTER!

     4  */

     5 /*

     6  * Licensed to the Apache Software Foundation (ASF) under one or more

     7  * contributor license agreements.  See the NOTICE file distributed with

     8  * this work for additional information regarding copyright ownership.

     9  * The ASF licenses this file to You under the Apache License, Version 2.0

    10  * (the "License"); you may not use this file except in compliance with

    11  * the License.  You may obtain a copy of the License at

    12  *

    13  *      http://www.apache.org/licenses/LICENSE-2.0

    14  *

    15  * Unless required by applicable law or agreed to in writing, software

    16  * distributed under the License is distributed on an "AS IS" BASIS,

    17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

    18  * See the License for the specific language governing permissions and

    19  * limitations under the License.

    20  */

    21 

    22 package com.sun.org.apache.xpath.internal.functions;

    23 

    24 import com.sun.org.apache.xpath.internal.XPathContext;

    25 import com.sun.org.apache.xpath.internal.objects.XObject;

    26 import com.sun.org.apache.xpath.internal.objects.XString;

    27 

    28 /**

    29  * Execute the SubstringBefore() function.

    30  * @xsl.usage advanced

    31  */

    32 public class FuncSubstringBefore extends Function2Args

    33 {

    34     static final long serialVersionUID = 4110547161672431775L;

    35 

    36   /**

    37    * Execute the function.  The function must return

    38    * a valid object.

    39    * @param xctxt The current execution context.

    40    * @return A valid XObject.

    41    *

    42    * @throws javax.xml.transform.TransformerException

    43    */

    44   public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException

    45   {

    46 

    47     String s1 = m_arg0.execute(xctxt).str();

    48     String s2 = m_arg1.execute(xctxt).str();

    49     int index = s1.indexOf(s2);

    50 

    51     return (-1 == index)

    52            ? XString.EMPTYSTRING : new XString(s1.substring(0, index));

    53   }

    54 }