| /* |
| * Copyright 2002,2004 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. |
| */ |
| package org.apache.commons.jelly.tags.xml; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.commons.jelly.JellyTagException; |
| import org.apache.commons.jelly.MissingAttributeException; |
| import org.apache.commons.jelly.XMLOutput; |
| import org.apache.commons.jelly.xpath.XPathTagSupport; |
| import org.dom4j.Node; |
| import org.dom4j.io.SAXWriter; |
| import org.jaxen.JaxenException; |
| import org.jaxen.XPath; |
| import org.xml.sax.SAXException; |
| |
| /** A tag which performs a copy-of operation like the XSLT tag |
| * |
| * @author James Strachan |
| */ |
| public class CopyOfTag extends XPathTagSupport { |
| |
| /** The XPath expression to evaluate. */ |
| private XPath select; |
| |
| /** Should we output lexical XML data like comments |
| * or entity names? |
| */ |
| private boolean lexical; |
| |
| public CopyOfTag() { |
| } |
| |
| // Tag interface |
| //------------------------------------------------------------------------- |
| public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException { |
| Object xpathContext = getXPathContext(); |
| |
| if (select == null) { |
| throw new MissingAttributeException( "select" ); |
| } |
| |
| SAXWriter saxWriter; |
| |
| if (lexical) { |
| saxWriter = new SAXWriter(output, output); |
| } else { |
| saxWriter = new SAXWriter(output); |
| } |
| |
| Object obj; |
| try { |
| obj = select.evaluate(xpathContext); |
| } catch (JaxenException e) { |
| throw new JellyTagException("Failed to evaluate XPath expression", e); |
| } |
| |
| try { |
| if (obj instanceof List) { |
| List nodes = (List) obj; |
| for (Iterator iter = nodes.iterator(); iter.hasNext(); ) { |
| Object object = iter.next(); |
| if ( object instanceof Node ) { |
| saxWriter.write( (Node) object ); |
| } |
| else if (object != null ) { |
| saxWriter.write( object.toString() ); |
| } |
| } |
| } else if (obj instanceof Node) { |
| saxWriter.write( (Node) obj ); |
| } else { |
| saxWriter.write( obj.toString() ); |
| } |
| } catch (SAXException e) { |
| throw new JellyTagException("Failed to write XML output.", e); |
| } |
| } |
| |
| // Properties |
| //------------------------------------------------------------------------- |
| /** Sets the XPath expression to evaluate. */ |
| public void setSelect(XPath select) { |
| this.select = select; |
| } |
| |
| public void setLexical(boolean lexical) { |
| this.lexical = lexical; |
| } |
| } |