| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * $Id: FuncLang.java 468655 2006-10-28 07:12:06Z minchau $ |
| */ |
| package org.apache.xpath.functions; |
| |
| import org.apache.xml.dtm.DTM; |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.objects.XBoolean; |
| import org.apache.xpath.objects.XObject; |
| |
| /** |
| * Execute the Lang() function. |
| * @xsl.usage advanced |
| */ |
| public class FuncLang extends FunctionOneArg |
| { |
| static final long serialVersionUID = -7868705139354872185L; |
| |
| /** |
| * Execute the function. The function must return |
| * a valid object. |
| * @param xctxt The current execution context. |
| * @return A valid XObject. |
| * |
| * @throws javax.xml.transform.TransformerException |
| */ |
| public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException |
| { |
| |
| String lang = m_arg0.execute(xctxt).str(); |
| int parent = xctxt.getCurrentNode(); |
| boolean isLang = false; |
| DTM dtm = xctxt.getDTM(parent); |
| |
| while (DTM.NULL != parent) |
| { |
| if (DTM.ELEMENT_NODE == dtm.getNodeType(parent)) |
| { |
| int langAttr = dtm.getAttributeNode(parent, "http://www.w3.org/XML/1998/namespace", "lang"); |
| |
| if (DTM.NULL != langAttr) |
| { |
| String langVal = dtm.getNodeValue(langAttr); |
| // %OPT% |
| if (langVal.toLowerCase().startsWith(lang.toLowerCase())) |
| { |
| int valLen = lang.length(); |
| |
| if ((langVal.length() == valLen) |
| || (langVal.charAt(valLen) == '-')) |
| { |
| isLang = true; |
| } |
| } |
| |
| break; |
| } |
| } |
| |
| parent = dtm.getParent(parent); |
| } |
| |
| return isLang ? XBoolean.S_TRUE : XBoolean.S_FALSE; |
| } |
| } |