/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xalan" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 1999, Lotus
* Development Corporation., http://www.lotus.com. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.xalan.transformer;
import java.io.OutputStream;
import java.io.Writer;
import java.util.Properties;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.TransformerException;
import org.apache.xalan.serialize.Method;
import org.apache.xalan.serialize.Serializer;
import org.apache.xalan.serialize.SerializerFactory;
import org.apache.xalan.templates.OutputProperties;
import org.xml.sax.ContentHandler;
/**
* This is a helper class that decides if Xalan needs to switch
* serializers, based on the first output element.
*/
public class SerializerSwitcher
{
/**
* Switch to HTML serializer if element is HTML
*
*
* @param transformer Non-null transformer instance
* @param ns Namespace URI of the element
* @param localName Local part of name of element
*
* @throws TransformerException
*/
public static void switchSerializerIfHTML(
TransformerImpl transformer, String ns, String localName)
throws TransformerException
{
if (null == transformer)
return;
if (((null == ns) || (ns.length() == 0))
&& localName.equalsIgnoreCase("html"))
{
// System.out.println("transformer.getOutputPropertyNoDefault(OutputKeys.METHOD): "+
// transformer.getOutputPropertyNoDefault(OutputKeys.METHOD));
// Access at level of hashtable to see if the method has been set.
if (null != transformer.getOutputPropertyNoDefault(OutputKeys.METHOD))
return;
// Getting the output properties this way won't cause a clone of
// the properties.
Properties prevProperties = transformer.getOutputFormat().getProperties();
// We have to make sure we get an output properties with the proper
// defaults for the HTML method. The easiest way to do this is to
// have the OutputProperties class do it.
OutputProperties htmlOutputProperties = new OutputProperties(Method.HTML);
htmlOutputProperties.copyFrom(prevProperties, true);
Properties htmlProperties = htmlOutputProperties.getProperties();
try
{
Serializer oldSerializer = transformer.getSerializer();
if (null != oldSerializer)
{
Serializer serializer =
SerializerFactory.getSerializer(htmlProperties);
Writer writer = oldSerializer.getWriter();
if (null != writer)
serializer.setWriter(writer);
else
{
OutputStream os = oldSerializer.getOutputStream();
if (null != os)
serializer.setOutputStream(os);
}
transformer.setSerializer(serializer);
ContentHandler ch = serializer.asContentHandler();
transformer.setContentHandler(ch);
}
}
catch (java.io.IOException e)
{
throw new TransformerException(e);
}
}
}
/**
* Get the value of a property, without using the default properties. This
* can be used to test if a property has been explicitly set by the stylesheet
* or user.
*
* @param name The property name, which is a fully-qualified URI.
*
* @return The value of the property, or null if not found.
*
* @throws IllegalArgumentException If the property is not supported,
* and is not namespaced.
*/
private static String getOutputPropertyNoDefault(String qnameString, Properties props)
throws IllegalArgumentException
{
String value = (String)props.get(qnameString);
return value;
}
/**
* Switch to HTML serializer if element is HTML
*
*
* @param ns Namespace URI of the element
* @param localName Local part of name of element
*
* @throws TransformerException
* @return new contentHandler.
*/
public static Serializer switchSerializerIfHTML(
String ns, String localName, Properties props, Serializer oldSerializer)
throws TransformerException
{
Serializer newSerializer = oldSerializer;
if (((null == ns) || (ns.length() == 0))
&& localName.equalsIgnoreCase("html"))
{
// System.out.println("transformer.getOutputPropertyNoDefault(OutputKeys.METHOD): "+
// transformer.getOutputPropertyNoDefault(OutputKeys.METHOD));
// Access at level of hashtable to see if the method has been set.
if (null != getOutputPropertyNoDefault(OutputKeys.METHOD, props))
return newSerializer;
// Getting the output properties this way won't cause a clone of
// the properties.
Properties prevProperties = props;
// We have to make sure we get an output properties with the proper
// defaults for the HTML method. The easiest way to do this is to
// have the OutputProperties class do it.
OutputProperties htmlOutputProperties = new OutputProperties(Method.HTML);
htmlOutputProperties.copyFrom(prevProperties, true);
Properties htmlProperties = htmlOutputProperties.getProperties();
// try
{
if (null != oldSerializer)
{
Serializer serializer =
SerializerFactory.getSerializer(htmlProperties);
Writer writer = oldSerializer.getWriter();
if (null != writer)
serializer.setWriter(writer);
else
{
OutputStream os = serializer.getOutputStream();
if (null != os)
serializer.setOutputStream(os);
}
newSerializer = serializer;
}
}
// catch (java.io.IOException e)
// {
// throw new TransformerException(e);
// }
}
return newSerializer;
}
}