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/*
* ====================================================================
* Project: openMDX/Core, http://www.openmdx.org/
* Description: JSONReader
* Owner: OMEX AG, Switzerland, http://www.omex.ch
* ====================================================================
*
* This software is published under the BSD license as listed below.
*
* Copyright (c) 2014, OMEX AG, Switzerland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of the openMDX team nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS 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 COPYRIGHT OWNER OR 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.
*
* ------------------
*
* Copyright 2006 Envoi Solutions LLC
*
* 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.openmdx.base.json.stream;
import java.io.IOException;
import java.net.URL;
import java.util.Collections;
import java.util.Map;
import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.stax.StAXSource;
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.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.XMLReader;
/**
* JSONReader
*
*/
public class JSONReader implements XMLReader {
public JSONReader(
) {
Map jsonConfiguration = Collections.emptyMap();
delegate = new StandardXMLInputFactory(jsonConfiguration);
}
//------------------------------------------------------------------------
// Implements XMLReader
//------------------------------------------------------------------------
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#getContentHandler()
*/
@Override
public ContentHandler getContentHandler(
) {
return this.contentHandler;
}
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#getDTDHandler()
*/
@Override
public DTDHandler getDTDHandler(
) {
return null;
}
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#getEntityResolver()
*/
@Override
public EntityResolver getEntityResolver() {
return null;
}
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#getErrorHandler()
*/
@Override
public ErrorHandler getErrorHandler() {
return this.errorHandler;
}
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#getFeature(java.lang.String)
*/
@Override
public boolean getFeature(
String name
) throws SAXNotRecognizedException, SAXNotSupportedException {
throw new SAXNotRecognizedException("Feature: " + name);
}
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#getProperty(java.lang.String)
*/
@Override
public Object getProperty(
String name
) throws SAXNotRecognizedException, SAXNotSupportedException {
throw new SAXNotRecognizedException("Property: " + name);
}
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#parse(org.xml.sax.InputSource)
*/
@Override
public void parse(
final InputSource input
) throws IOException, SAXException {
try {
final XMLStreamReader jsonReader;
if(input.getCharacterStream() != null) {
jsonReader = delegate.createXMLStreamReader(input.getCharacterStream());
} else if(input.getByteStream() != null) {
jsonReader = delegate.createXMLStreamReader(input.getByteStream(), input.getEncoding());
} else if(input.getSystemId() != null) {
jsonReader = delegate.createXMLStreamReader(new URL(input.getSystemId()).openStream(), input.getEncoding());
} else {
throw new SAXException("Empty input source");
}
Transformer transformer = transformerFactory.newTransformer();
transformer.transform(
new StAXSource(jsonReader),
new SAXResult(this.contentHandler)
);
} catch (Exception exception) {
throw new SAXException("JSON reader failure", exception);
}
}
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#parse(java.lang.String)
*/
@Override
public void parse(
String systemId
) throws IOException, SAXException {
parse(new InputSource(systemId));
}
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#setContentHandler(org.xml.sax.ContentHandler)
*/
@Override
public void setContentHandler(ContentHandler handler) {
this.contentHandler = handler;
}
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#setDTDHandler(org.xml.sax.DTDHandler)
*/
@Override
public void setDTDHandler(DTDHandler handler) {
// no DTD will be provided
}
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#setEntityResolver(org.xml.sax.EntityResolver)
*/
@Override
public void setEntityResolver(EntityResolver resolver) {
// no entity resolution will take place
}
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#setErrorHandler(org.xml.sax.ErrorHandler)
*/
@Override
public void setErrorHandler(ErrorHandler handler) {
this.errorHandler = handler;
}
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#setFeature(java.lang.String, boolean)
*/
@Override
public void setFeature(
String name,
boolean value
) throws SAXNotRecognizedException, SAXNotSupportedException {
throw new SAXNotRecognizedException("Feature: " + name);
}
/* (non-Javadoc)
* @see org.xml.sax.XMLReader#setProperty(java.lang.String, java.lang.Object)
*/
@Override
public void setProperty(
String name,
Object value
) throws SAXNotRecognizedException, SAXNotSupportedException {
throw new SAXNotRecognizedException("Property: " + name);
}
//-----------------------------------------------------------------------
// Members
//-----------------------------------------------------------------------
private final StandardXMLInputFactory delegate;
private static TransformerFactory transformerFactory = TransformerFactory.newInstance();
private ContentHandler contentHandler;
private ErrorHandler errorHandler;
}
