/*
* 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.
*/
/* $Id: AbstractObjectReader.java,v 1.2 2009/03/09 15:37:04 zhangst Exp $ */
package com.opentravelsoft.util;
//Java
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.xml.sax.ContentHandler;
import org.xml.sax.DTDHandler;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
/**
* This class can be used as base class for XMLReaders that generate SAX events
* from Java objects.
*/
public abstract class AbstractObjectReader implements XMLReader
{
private static final String NAMESPACES = "http://xml.org/sax/features/namespaces";
private static final String NS_PREFIXES = "http://xml.org/sax/features/namespace-prefixes";
private Map<String, Boolean> features = new HashMap<String, Boolean>();
private ContentHandler orgHandler;
/** Proxy for easy SAX event generation */
protected EasyGenerationContentHandlerProxy handler;
/** Error handler */
protected ErrorHandler errorHandler;
/**
* Constructor for the AbstractObjectReader object
*/
public AbstractObjectReader()
{
setFeature(NAMESPACES, false);
setFeature(NS_PREFIXES, false);
}
/* ============ XMLReader interface ============ */
/**
* @see org.xml.sax.XMLReader#getContentHandler()
*/
public ContentHandler getContentHandler()
{
return this.orgHandler;
}
/**
* @see org.xml.sax.XMLReader#setContentHandler(ContentHandler)
*/
public void setContentHandler(ContentHandler handler)
{
this.orgHandler = handler;
this.handler = new EasyGenerationContentHandlerProxy(handler);
}
/**
* @see org.xml.sax.XMLReader#getErrorHandler()
*/
public ErrorHandler getErrorHandler()
{
return this.errorHandler;
}
/**
* @see org.xml.sax.XMLReader#setErrorHandler(ErrorHandler)
*/
public void setErrorHandler(ErrorHandler handler)
{
this.errorHandler = handler;
}
/**
* @see org.xml.sax.XMLReader#getDTDHandler()
*/
public DTDHandler getDTDHandler()
{
return null;
}
/**
* @see org.xml.sax.XMLReader#setDTDHandler(DTDHandler)
*/
public void setDTDHandler(DTDHandler handler)
{
}
/**
* @see org.xml.sax.XMLReader#getEntityResolver()
*/
public EntityResolver getEntityResolver()
{
return null;
}
/**
* @see org.xml.sax.XMLReader#setEntityResolver(EntityResolver)
*/
public void setEntityResolver(EntityResolver resolver)
{
}
/**
* @see org.xml.sax.XMLReader#getProperty(String)
*/
public Object getProperty(java.lang.String name)
{
return null;
}
/**
* @see org.xml.sax.XMLReader#setProperty(String, Object)
*/
public void setProperty(java.lang.String name, java.lang.Object value)
{
}
/**
* @see org.xml.sax.XMLReader#getFeature(String)
*/
public boolean getFeature(java.lang.String name)
{
return ((Boolean) features.get(name)).booleanValue();
}
/**
* Returns true if the NAMESPACES feature is enabled.
*
* @return boolean true if enabled
*/
protected boolean isNamespaces()
{
return getFeature(NAMESPACES);
}
/**
* Returns true if the MS_PREFIXES feature is enabled.
*
* @return boolean true if enabled
*/
protected boolean isNamespacePrefixes()
{
return getFeature(NS_PREFIXES);
}
/**
* @see org.xml.sax.XMLReader#setFeature(String, boolean)
*/
public void setFeature(String name, boolean value)
{
this.features.put(name, new Boolean(value));
}
/**
* @see org.xml.sax.XMLReader#parse(String)
*/
public void parse(String systemId) throws IOException, SAXException
{
throw new SAXException(this.getClass().getName()
+ " cannot be used with system identifiers (URIs)");
}
/**
* @see org.xml.sax.XMLReader#parse(InputSource)
*/
public abstract void parse(InputSource input) throws IOException,
SAXException;
}