- /*
- * Copyright 1999-2004 The Apache Software Foundation.
- *
- * Licensed 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,v 1.8 2004/02/17 04:34:01 minchau Exp $
- */
- package com.sun.org.apache.xpath.internal.functions;
-
- import com.sun.org.apache.xml.internal.dtm.DTM;
- import com.sun.org.apache.xpath.internal.XPathContext;
- import com.sun.org.apache.xpath.internal.objects.XBoolean;
- import com.sun.org.apache.xpath.internal.objects.XObject;
-
- /**
- * Execute the Lang() function.
- * @xsl.usage advanced
- */
- public class FuncLang extends FunctionOneArg
- {
-
- /**
- * 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;
- }
- }