/*
* 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.
*/
package org.apache.cocoon.components.source.helpers;
import org.apache.cocoon.xml.dom.DOMBuilder;
import org.apache.cocoon.xml.dom.DOMStreamer;
import org.apache.excalibur.xml.sax.XMLizable;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;
/**
* The interface for a property of a source
*
* @author <a href="mailto:stephan@apache.org">Stephan Michels</a>
* @author <a href="mailto:holz@fiz-chemie.de">Martin Holz</a>
* @version CVS $Id: SourceProperty.java,v 1.3 2004/03/27 21:49:09 unico Exp $
*/
public class SourceProperty implements XMLizable {
private static final String URI = "http://www.w3.org/2000/xmlns/";
private static final String NS_PREFIX = "property";
private static final String D_PREFIX = NS_PREFIX+":";
private String namespace;
private String name;
private Element value;
/**
* Creates a new property for a source
*
* @param namespace The namespace of the property
* @param name The name of the property
*/
public SourceProperty(String namespace, String name) {
this.namespace = namespace;
this.name = name;
try {
DOMBuilder builder = new DOMBuilder();
builder.startDocument();
builder.startPrefixMapping(NS_PREFIX, namespace);
AttributesImpl attrs = new AttributesImpl();
attrs.addAttribute(URI, NS_PREFIX, "xmlns:"+NS_PREFIX, "NMTOKEN", namespace);
builder.startElement(namespace, name, D_PREFIX+name, attrs);
builder.endElement(namespace, name, D_PREFIX+name);
builder.endPrefixMapping(NS_PREFIX);
Document doc = builder.getDocument();
this.value = doc.getDocumentElement();
} catch (SAXException se) {
// do nothing
}
}
/**
* Creates a new property for a source
*
* @param namespace The namespace of the property
* @param name The name of the property
* @param value The value of the property
*/
public SourceProperty(String namespace, String name, String value) {
this.namespace = namespace;
this.name = name;
setValue(value);
}
/**
* Creates a new property for a source
*
* @param property The property in DOM representation
*/
public SourceProperty(Element property) {
this.namespace = property.getNamespaceURI();
this.name = property.getLocalName();
this.value = property;
}
/**
* Sets the namespace for this property
*
* @param namespace The namespace of the property
* @deprecated buggy
*/
public void setNamespace(String namespace) {
this.namespace = namespace;
}
/**
* Return the namespace of the property
*
* @return The namespace of the property
*/
public String getNamespace() {
return this.namespace;
}
/**
* Sets the name of the property
*
* @param name Name of the property
* @deprecated buggy
*/
public void setName(String name) {
this.name = name;
}
/**
* Return the name of the property
*
* @return Name of the property
*/
public String getName() {
return this.name;
}
/**
* Sets the value of the property
*
* @param value Value of the property
*/
public void setValue(String value) {
try {
DOMBuilder builder = new DOMBuilder();
builder.startDocument();
builder.startPrefixMapping(NS_PREFIX, namespace);
AttributesImpl attrs = new AttributesImpl();
attrs.addAttribute(URI, NS_PREFIX, "xmlns:"+NS_PREFIX, "NMTOKEN", namespace);
builder.startElement(namespace, name, D_PREFIX+name, attrs);
builder.characters(value.toCharArray(), 0, value.length());
builder.endElement(namespace, name, D_PREFIX+name);
builder.endPrefixMapping(NS_PREFIX);
builder.endDocument();
Document doc = builder.getDocument();
this.value = doc.getDocumentElement();
} catch (SAXException se) {
// do nothing
}
}
/**
* Returns the value of the property
*
* @return Value of the property
*/
public String getValueAsString() {
NodeList nodeslist = this.value.getChildNodes();
StringBuffer buffer = new StringBuffer();
for (int i = 0; i<nodeslist.getLength(); i++) {
if ((nodeslist.item(i).getNodeType()==Node.TEXT_NODE) ||
(nodeslist.item(i).getNodeType()==Node.CDATA_SECTION_NODE))
{
buffer.append(nodeslist.item(i).getNodeValue());
}
}
return buffer.toString();
}
/**
* Sets the value of the property
*
* @param values
*/
public void setValue(NodeList values) {
try {
DOMBuilder builder = new DOMBuilder();
builder.startDocument();
builder.startElement(namespace, name, name, new AttributesImpl());
DOMStreamer stream = new DOMStreamer(builder);
for (int i = 0; i<values.getLength(); i++) {
stream.stream(values.item(i));
}
builder.endElement(namespace, name, name);
builder.endDocument();
Document doc = builder.getDocument();
this.value = doc.getDocumentElement();
} catch (SAXException se) {
// do nothing
}
}
/**
* Get the property value as DOM Element.
*/
public Element getValue() {
return this.value;
}
/**
* Generates SAX events representing the object's state.<br/>
* <b>NOTE</b> : if the implementation can produce lexical events, care should be taken
* that <code>handler</code> can actually be a {@link org.apache.cocoon.xml.XMLConsumer} that accepts such
* events.
*
* @param handler
*/
public void toSAX(ContentHandler handler) throws SAXException {
DOMStreamer stream = new DOMStreamer(handler);
stream.stream(this.value);
}
}