| /* |
| * 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: FuncExtElementAvailable.java 468655 2006-10-28 07:12:06Z minchau $ |
| */ |
| package org.apache.xpath.functions; |
| |
| import org.apache.xalan.templates.Constants; |
| import org.apache.xalan.transformer.TransformerImpl; |
| import org.apache.xml.utils.QName; |
| import org.apache.xpath.ExtensionsProvider; |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.objects.XBoolean; |
| import org.apache.xpath.objects.XObject; |
| |
| /** |
| * Execute the ExtElementAvailable() function. |
| * @xsl.usage advanced |
| */ |
| public class FuncExtElementAvailable extends FunctionOneArg |
| { |
| static final long serialVersionUID = -472533699257968546L; |
| |
| /** |
| * 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 prefix; |
| String namespace; |
| String methName; |
| |
| String fullName = m_arg0.execute(xctxt).str(); |
| int indexOfNSSep = fullName.indexOf(':'); |
| |
| if (indexOfNSSep < 0) |
| { |
| prefix = ""; |
| namespace = Constants.S_XSLNAMESPACEURL; |
| methName = fullName; |
| } |
| else |
| { |
| prefix = fullName.substring(0, indexOfNSSep); |
| namespace = xctxt.getNamespaceContext().getNamespaceForPrefix(prefix); |
| if (null == namespace) |
| return XBoolean.S_FALSE; |
| methName= fullName.substring(indexOfNSSep + 1); |
| } |
| |
| if (namespace.equals(Constants.S_XSLNAMESPACEURL) |
| || namespace.equals(Constants.S_BUILTIN_EXTENSIONS_URL)) |
| { |
| try |
| { |
| TransformerImpl transformer = (TransformerImpl) xctxt.getOwnerObject(); |
| return transformer.getStylesheet().getAvailableElements().containsKey( |
| new QName(namespace, methName)) |
| ? XBoolean.S_TRUE : XBoolean.S_FALSE; |
| } |
| catch (Exception e) |
| { |
| return XBoolean.S_FALSE; |
| } |
| } |
| else |
| { |
| //dml |
| ExtensionsProvider extProvider = (ExtensionsProvider)xctxt.getOwnerObject(); |
| return extProvider.elementAvailable(namespace, methName) |
| ? XBoolean.S_TRUE : XBoolean.S_FALSE; |
| } |
| } |
| } |