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 22package com.sun.org.apache.xpath.internal.functions; 23 24import com.sun.org.apache.xml.internal.dtm.DTM; 25import com.sun.org.apache.xpath.internal.XPathContext; 26import com.sun.org.apache.xpath.internal.objects.XObject; 27import com.sun.org.apache.xpath.internal.objects.XString; 28 29/** 30 * Execute the GenerateId() function. 31 * @xsl.usage advanced 32 */ 33public 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} 64