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.XBoolean; 27import com.sun.org.apache.xpath.internal.objects.XObject; 28 29/** 30 * Execute the Lang() function. 31 * @xsl.usage advanced 32 */ 33public class FuncLang extends FunctionOneArg 34{ 35 static final long serialVersionUID = -7868705139354872185L; 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 String lang = m_arg0.execute(xctxt).str(); 49 int parent = xctxt.getCurrentNode(); 50 boolean isLang = false; 51 DTM dtm = xctxt.getDTM(parent); 52 53 while (DTM.NULL != parent) 54 { 55 if (DTM.ELEMENT_NODE == dtm.getNodeType(parent)) 56 { 57 int langAttr = dtm.getAttributeNode(parent, "http://www.w3.org/XML/1998/namespace", "lang"); 58 59 if (DTM.NULL != langAttr) 60 { 61 String langVal = dtm.getNodeValue(langAttr); 62 // %OPT% 63 if (langVal.toLowerCase().startsWith(lang.toLowerCase())) 64 { 65 int valLen = lang.length(); 66 67 if ((langVal.length() == valLen) 68 || (langVal.charAt(valLen) == '-')) 69 { 70 isLang = true; 71 } 72 } 73 74 break; 75 } 76 } 77 78 parent = dtm.getParent(parent); 79 } 80 81 return isLang ? XBoolean.S_TRUE : XBoolean.S_FALSE; 82 } 83} 84