/*
* 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.cocoon.template.script;
import org.apache.cocoon.el.objectmodel.ObjectModel;
import org.apache.cocoon.template.JXTemplateGenerator;
import org.apache.cocoon.template.environment.ExecutionContext;
import org.apache.cocoon.template.environment.LocatorFacade;
import org.apache.cocoon.template.instruction.Call;
import org.apache.cocoon.template.instruction.Define;
import org.apache.cocoon.template.instruction.Instruction;
import org.apache.cocoon.template.instruction.MacroContext;
import org.apache.cocoon.template.script.event.Event;
import org.apache.cocoon.template.script.event.StartElement;
import org.apache.cocoon.xml.IncludeXMLConsumer;
import org.apache.cocoon.xml.XMLConsumer;
import org.apache.cocoon.xml.dom.DOMBuilder;
import org.apache.cocoon.xml.dom.DOMStreamer;
import org.apache.cocoon.xml.util.NamespacesTable;
import org.apache.commons.lang.ArrayUtils;
import org.apache.excalibur.xml.sax.XMLizable;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;
/**
* @version $Id: Invoker.java 569795 2007-08-26 10:08:56Z danielf $
*/
public class Invoker {
private static final Attributes EMPTY_ATTRS = new AttributesImpl();
public static void execute(final XMLConsumer consumer,
ObjectModel objectModel,
ExecutionContext executionContext, MacroContext macroContext, NamespacesTable namespaces,
Event startEvent, Event endEvent) throws SAXException {
Event ev = startEvent;
LocatorFacade loc = new LocatorFacade(ev.getLocation());
consumer.setDocumentLocator(loc);
while (ev != endEvent) {
loc.setDocumentLocator(ev.getLocation());
// ContentHandler methods
if (ev instanceof StartElement) {
StartElement startElement = (StartElement) ev;
Define def = (Define) executionContext
.getDefinitions().get(startElement.getQname());
if (def == null) {
ev = ev.execute(consumer, objectModel,
executionContext, macroContext, namespaces, startEvent, endEvent);
continue;
}
Call call = new Call( def, startElement );
ev = call.execute(consumer, objectModel,
executionContext, macroContext, namespaces, startEvent, endEvent);
} else
ev = ev.execute(consumer, objectModel, executionContext,
macroContext, namespaces, startEvent, endEvent);
}
}
public static void executeNode(final XMLConsumer consumer, Object val) throws SAXException {
executeNode(consumer, val, false);
}
public static void executeNode(final XMLConsumer consumer, Object val, boolean stripRoot) throws SAXException {
if (val instanceof Node) {
executeDOM(consumer, (Node) val, stripRoot);
} else if (val instanceof NodeList) {
NodeList nodeList = (NodeList) val;
int len = nodeList.getLength();
for (int i = 0; i < len; i++) {
Node n = nodeList.item(i);
//TODO: should this take stripRoot into account?
executeDOM(consumer, n);
}
} else if (val instanceof Node[]) {
Node[] nodeList = (Node[]) val;
int len = nodeList.length;
for (int i = 0; i < len; i++) {
Node n = nodeList[i];
//TODO: should this take stripRoot into account?
executeDOM(consumer, n);
}
} else if (val instanceof XMLizable) {
IncludeXMLConsumer includer = new IncludeXMLConsumer(consumer);
includer.setIgnoreRootElement(stripRoot);
((XMLizable) val).toSAX(includer);
} else {
char[] ch = val == null ? ArrayUtils.EMPTY_CHAR_ARRAY : val
.toString().toCharArray();
consumer.characters(ch, 0, ch.length);
}
}
public static void executeDOM(final XMLConsumer consumer, Node node)
throws SAXException {
executeDOM(consumer, node, false);
}
/**
* dump a DOM document, using an IncludeXMLConsumer to filter out start/end document events
*/
public static void executeDOM(final XMLConsumer consumer, Node node, boolean stripRoot)
throws SAXException {
IncludeXMLConsumer includer = new IncludeXMLConsumer(consumer);
includer.setIgnoreRootElement(stripRoot);
DOMStreamer streamer = new DOMStreamer(includer);
streamer.stream(node);
}
public static NodeList toDOMNodeList(String elementName,
Instruction si, ObjectModel objectModel,
ExecutionContext executionContext, MacroContext macroContext, NamespacesTable namespaces)
throws SAXException {
DOMBuilder builder = new DOMBuilder();
builder.startDocument();
builder.startElement(JXTemplateGenerator.NS, elementName, elementName,
EMPTY_ATTRS);
execute(builder, objectModel, executionContext, macroContext, namespaces, si.getNext(), si.getEndInstruction());
builder.endElement(JXTemplateGenerator.NS, elementName, elementName);
builder.endDocument();
Node node = builder.getDocument().getDocumentElement();
return node.getChildNodes();
}
}