| /* |
| * 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. |
| */ |
| package org.apache.commons.jelly.tags.xml; |
| |
| import org.apache.commons.jelly.JellyException; |
| import org.apache.commons.jelly.JellyTagException; |
| import org.apache.commons.jelly.TagSupport; |
| import org.apache.commons.jelly.XMLOutput; |
| import org.xml.sax.Attributes; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.helpers.AttributesImpl; |
| |
| /** A tag to produce an XML element which can contain other attributes |
| * or elements like the <code><xsl:element></code> tag. |
| * |
| * @author James Strachan |
| * @version $Revision$ |
| */ |
| public class ElementTag extends TagSupport { |
| |
| /** The namespace URI. */ |
| private String namespace; |
| |
| /** The qualified name. */ |
| private String name; |
| |
| /** The XML Attributes. */ |
| private AttributesImpl attributes = new AttributesImpl(); |
| |
| /** flag set if attributes are output. */ |
| private boolean outputAttributes; |
| |
| public ElementTag() { |
| } |
| |
| /** |
| * Sets the attribute of the given name to the specified value. |
| * |
| * @param name of the attribute |
| * @param value of the attribute |
| * @param uri namespace of the attribute |
| * @throws JellyTagException if the start element has already been output. |
| * Attributes must be set on the outer element before any content |
| * (child elements or text) is output |
| */ |
| public void setAttributeValue(String name, String value, String uri) throws JellyTagException { |
| if (outputAttributes) { |
| throw new JellyTagException( |
| "Cannot set the value of attribute: " |
| + name + " as we have already output the startElement() SAX event" |
| ); |
| } |
| |
| // ### we'll assume that all attributes are in no namespace! |
| // ### this is severely limiting! |
| // ### we should be namespace aware |
| // NAMESPACE FIXED: |
| int idx = name.indexOf(':'); |
| final String localName = (idx >= 0) |
| ? name.substring(idx + 1) |
| : name; |
| final String nsUri = (uri != null) |
| ? uri |
| : ""; |
| |
| int index = attributes.getIndex(nsUri, localName); |
| if (index >= 0) { |
| attributes.removeAttribute(index); |
| } |
| // treat null values as no attribute |
| if (value != null) { |
| attributes.addAttribute(nsUri, localName, name, "CDATA", value); |
| } |
| } |
| |
| // Tag interface |
| //------------------------------------------------------------------------- |
| public void doTag(XMLOutput output) throws JellyTagException { |
| int idx = name.indexOf(':'); |
| final String localName = (idx >= 0) |
| ? name.substring(idx + 1) |
| : name; |
| |
| outputAttributes = false; |
| |
| XMLOutput newOutput = new XMLOutput(output) { |
| |
| // add an initialize hook to the core content-generating methods |
| |
| public void startElement( |
| String uri, |
| String localName, |
| String qName, |
| Attributes atts) |
| throws SAXException { |
| initialize(); |
| super.startElement(uri, localName, qName, atts); |
| } |
| |
| public void endElement(String uri, String localName, String qName) |
| throws SAXException { |
| initialize(); |
| super.endElement(uri, localName, qName); |
| } |
| |
| public void characters(char[] ch, int start, int length) throws SAXException { |
| initialize(); |
| super.characters(ch, start, length); |
| } |
| |
| public void ignorableWhitespace(char[] ch, int start, int length) |
| throws SAXException { |
| initialize(); |
| super.ignorableWhitespace(ch, start, length); |
| } |
| |
| public void objectData(Object object) |
| throws SAXException { |
| initialize(); |
| super.objectData(object); |
| } |
| |
| public void processingInstruction(String target, String data) |
| throws SAXException { |
| initialize(); |
| super.processingInstruction(target, data); |
| } |
| |
| /** |
| * Ensure that the outer start element is generated |
| * before any content is output. |
| */ |
| protected void initialize() throws SAXException { |
| if (!outputAttributes) { |
| super.startElement(namespace, localName, name, attributes); |
| outputAttributes = true; |
| } |
| } |
| }; |
| |
| invokeBody(newOutput); |
| |
| try { |
| if (!outputAttributes) { |
| output.startElement(namespace, localName, name, attributes); |
| outputAttributes = true; |
| } |
| |
| output.endElement(namespace, localName, name); |
| attributes.clear(); |
| } catch (SAXException e) { |
| throw new JellyTagException(e); |
| } |
| } |
| |
| // Properties |
| //------------------------------------------------------------------------- |
| |
| /** |
| * @return the qualified name of the element |
| */ |
| public String getName() { |
| return name; |
| } |
| |
| /** |
| * Sets the qualified name of the element |
| */ |
| public void setName(String name) { |
| this.name = name; |
| } |
| |
| /** |
| * @return the namespace URI of the element |
| */ |
| public String getURI() { |
| return namespace; |
| } |
| |
| /** |
| * Sets the namespace URI of the element |
| */ |
| public void setURI(String namespace) { |
| this.namespace = namespace; |
| } |
| } |