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.xml.internal.dtm.DTM;

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

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

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

    28 

    29 /**

    30  * Execute the GenerateId() function.

    31  * @xsl.usage advanced

    32  */

    33 public class FuncGenerateId extends FunctionDef1Arg

    34 {

    35     static final long serialVersionUID = 973544842091724273L;

    36 

    37   /**

    38    * Execute the function.  The function must return

    39    * a valid object.

    40    * @param xctxt The current execution context.

    41    * @return A valid XObject.

    42    *

    43    * @throws javax.xml.transform.TransformerException

    44    */

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

    46   {

    47 

    48     int which = getArg0AsNode(xctxt);

    49 

    50     if (DTM.NULL != which)

    51     {

    52       // Note that this is a different value than in previous releases

    53       // of Xalan. It's sensitive to the exact encoding of the node

    54       // handle anyway, so fighting to maintain backward compatability

    55       // really didn't make sense; it may change again as we continue

    56       // to experiment with balancing document and node numbers within

    57       // that value.

    58       return new XString("N" + Integer.toHexString(which).toUpperCase());

    59     }

    60     else

    61       return XString.EMPTYSTRING;

    62   }

    63 }