2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
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15 * See the License for the specific language governing permissions and
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19 * $Id: FuncExtElementAvailable.java 468655 2006-10-28 07:12:06Z minchau $
21 package org.apache.xpath.functions;
23 import org.apache.xalan.templates.Constants;
24 import org.apache.xalan.transformer.TransformerImpl;
25 import org.apache.xml.utils.QName;
26 import org.apache.xpath.ExtensionsProvider;
27 import org.apache.xpath.XPathContext;
28 import org.apache.xpath.objects.XBoolean;
29 import org.apache.xpath.objects.XObject;
32 * Execute the ExtElementAvailable() function.
35 public class FuncExtElementAvailable extends FunctionOneArg
37 static final long serialVersionUID = -472533699257968546L;
40 * Execute the function. The function must return
42 * @param xctxt The current execution context.
43 * @return A valid XObject.
45 * @throws javax.xml.transform.TransformerException
47 public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
54 String fullName = m_arg0.execute(xctxt).str();
55 int indexOfNSSep = fullName.indexOf(':');
60 namespace = Constants.S_XSLNAMESPACEURL;
65 prefix = fullName.substring(0, indexOfNSSep);
66 namespace = xctxt.getNamespaceContext().getNamespaceForPrefix(prefix);
67 if (null == namespace)
68 return XBoolean.S_FALSE;
69 methName= fullName.substring(indexOfNSSep + 1);
72 if (namespace.equals(Constants.S_XSLNAMESPACEURL)
73 || namespace.equals(Constants.S_BUILTIN_EXTENSIONS_URL))
77 TransformerImpl transformer = (TransformerImpl) xctxt.getOwnerObject();
78 return transformer.getStylesheet().getAvailableElements().containsKey(
79 new QName(namespace, methName))
80 ? XBoolean.S_TRUE : XBoolean.S_FALSE;
84 return XBoolean.S_FALSE;
90 ExtensionsProvider extProvider = (ExtensionsProvider)xctxt.getOwnerObject();
91 return extProvider.elementAvailable(namespace, methName)
92 ? XBoolean.S_TRUE : XBoolean.S_FALSE;