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/*
* $Id: XMLInputFactoryImpl.java,v 1.8 2010-11-01 04:40:40 joehw Exp $
* %W% %E%
*/
package com.sun.xml.internal.stream;
import java.io.InputStream;
import java.io.Reader;
import javax.xml.stream.*;
import javax.xml.stream.util.XMLEventAllocator ;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
import com.sun.org.apache.xerces.internal.xni.parser.XMLInputSource;
import com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl;
import com.sun.org.apache.xerces.internal.impl.PropertyManager;
import com.sun.org.apache.xerces.internal.impl.XMLStreamFilterImpl;
import com.sun.org.apache.xerces.internal.impl.Constants;
/** Factory Implementation for XMLInputFactory.
* @author Neeraj Bajaj Sun Microsystems
* @author K.Venugopal Sun Microsystems
*/
//xxx: Should we be reusing the XMLInputSource object
public class XMLInputFactoryImpl extends javax.xml.stream.XMLInputFactory {
//List of supported properties and default values.
private PropertyManager fPropertyManager = new PropertyManager(PropertyManager.CONTEXT_READER) ;
private static final boolean DEBUG = false;
//Maintain a reference to last reader instantiated.
private XMLStreamReaderImpl fTempReader = null ;
boolean fPropertyChanged = false;
//no reader reuse by default
boolean fReuseInstance = false;
/** Creates a new instance of ZephryParserFactory */
public XMLInputFactoryImpl() {
}
void initEventReader(){
fPropertyChanged = true;
}
/**
* @param inputstream
* @throws XMLStreamException
* @return
*/
public XMLEventReader createXMLEventReader(InputStream inputstream) throws XMLStreamException {
initEventReader();
//delegate everything to XMLStreamReader
return new XMLEventReaderImpl(createXMLStreamReader(inputstream));
}
public XMLEventReader createXMLEventReader(Reader reader) throws XMLStreamException {
initEventReader();
//delegate everything to XMLStreamReader
return new XMLEventReaderImpl(createXMLStreamReader(reader));
}
public XMLEventReader createXMLEventReader(Source source) throws XMLStreamException {
initEventReader();
//delegate everything to XMLStreamReader
return new XMLEventReaderImpl(createXMLStreamReader(source));
}
public XMLEventReader createXMLEventReader(String systemId, InputStream inputstream) throws XMLStreamException {
initEventReader();
//delegate everything to XMLStreamReader
return new XMLEventReaderImpl(createXMLStreamReader(systemId, inputstream));
}
public XMLEventReader createXMLEventReader(java.io.InputStream stream, String encoding) throws XMLStreamException {
initEventReader();
//delegate everything to XMLStreamReader
return new XMLEventReaderImpl(createXMLStreamReader(stream, encoding));
}
public XMLEventReader createXMLEventReader(String systemId, Reader reader) throws XMLStreamException {
initEventReader();
//delegate everything to XMLStreamReader
return new XMLEventReaderImpl(createXMLStreamReader(systemId, reader));
}
/** Create a new XMLEventReader from an XMLStreamReader. After being used
* to construct the XMLEventReader instance returned from this method
* the XMLStreamReader must not be used.
* @param reader the XMLStreamReader to read from (may not be modified)
* @return a new XMLEventReader
* @throws XMLStreamException
*/
public XMLEventReader createXMLEventReader(XMLStreamReader reader) throws XMLStreamException {
//xxx: what do we do now -- instance is passed from the application
//probably we should check if the state is at the start document,
//eventreader call to next() should return START_DOCUMENT and
//then delegate every call to underlying streamReader
return new XMLEventReaderImpl(reader) ;
}
public XMLStreamReader createXMLStreamReader(InputStream inputstream) throws XMLStreamException {
XMLInputSource inputSource = new XMLInputSource(null, null, null, inputstream, null);
return getXMLStreamReaderImpl(inputSource);
}
public XMLStreamReader createXMLStreamReader(Reader reader) throws XMLStreamException {
XMLInputSource inputSource = new XMLInputSource(null, null, null, reader, null);
return getXMLStreamReaderImpl(inputSource);
}
public XMLStreamReader createXMLStreamReader(String systemId, Reader reader) throws XMLStreamException {
XMLInputSource inputSource = new XMLInputSource(null,systemId,null,reader,null);
return getXMLStreamReaderImpl(inputSource);
}
public XMLStreamReader createXMLStreamReader(Source source) throws XMLStreamException {
return new XMLStreamReaderImpl(jaxpSourcetoXMLInputSource(source),
new PropertyManager(fPropertyManager));
}
public XMLStreamReader createXMLStreamReader(String systemId, InputStream inputstream) throws XMLStreamException {
XMLInputSource inputSource = new XMLInputSource(null,systemId,null,inputstream,null);
return getXMLStreamReaderImpl(inputSource);
}
public XMLStreamReader createXMLStreamReader(InputStream inputstream, String encoding) throws XMLStreamException {
XMLInputSource inputSource = new XMLInputSource(null,null,null,inputstream,encoding);
return getXMLStreamReaderImpl(inputSource);
}
public XMLEventAllocator getEventAllocator() {
return (XMLEventAllocator)getProperty(XMLInputFactory.ALLOCATOR);
}
public XMLReporter getXMLReporter() {
return (XMLReporter)fPropertyManager.getProperty(XMLInputFactory.REPORTER);
}
public XMLResolver getXMLResolver() {
Object object = fPropertyManager.getProperty(XMLInputFactory.RESOLVER);
return (XMLResolver)object;
//return (XMLResolver)fPropertyManager.getProperty(XMLInputFactory.RESOLVER);
}
public void setXMLReporter(XMLReporter xmlreporter) {
fPropertyManager.setProperty(XMLInputFactory.REPORTER, xmlreporter);
}
public void setXMLResolver(XMLResolver xmlresolver) {
fPropertyManager.setProperty(XMLInputFactory.RESOLVER, xmlresolver);
}
/** Create a filtered event reader that wraps the filter around the event reader
* @param reader the event reader to wrap
* @param filter the filter to apply to the event reader
* @throws XMLStreamException
*/
public XMLEventReader createFilteredReader(XMLEventReader reader, EventFilter filter) throws XMLStreamException {
return new EventFilterSupport(reader, filter);
}
/** Create a filtered reader that wraps the filter around the reader
* @param reader the reader to filter
* @param filter the filter to apply to the reader
* @throws XMLStreamException
*/
public XMLStreamReader createFilteredReader(XMLStreamReader reader, StreamFilter filter) throws XMLStreamException {
if( reader != null && filter != null )
return new XMLStreamFilterImpl(reader,filter);
return null;
}
/** Get the value of a feature/property from the underlying implementation
* @param name The name of the property (may not be null)
* @return The value of the property
* @throws IllegalArgumentException if the property is not supported
*/
public Object getProperty(java.lang.String name) throws java.lang.IllegalArgumentException {
if(name == null){
throw new IllegalArgumentException("Property not supported");
}
if(fPropertyManager.containsProperty(name))
return fPropertyManager.getProperty(name);
throw new IllegalArgumentException("Property not supported");
}
/** Query the set of fProperties that this factory supports.
*
* @param name The name of the property (may not be null)
* @return true if the property is supported and false otherwise
*/
public boolean isPropertySupported(String name) {
if(name == null)
return false ;
else
return fPropertyManager.containsProperty(name);
}
/** Set a user defined event allocator for events
* @param allocator the user defined allocator
*/
public void setEventAllocator(XMLEventAllocator allocator) {
fPropertyManager.setProperty(XMLInputFactory.ALLOCATOR, allocator);
}
/** Allows the user to set specific feature/property on the underlying implementation. The underlying implementation
* is not required to support every setting of every property in the specification and may use IllegalArgumentException
* to signal that an unsupported property may not be set with the specified value.
* @param name The name of the property (may not be null)
* @param value The value of the property
* @throws java.lang.IllegalArgumentException if the property is not supported
*/
public void setProperty(java.lang.String name, Object value) throws java.lang.IllegalArgumentException {
if(name == null || value == null || !fPropertyManager.containsProperty(name) ){
throw new IllegalArgumentException("Property "+name+" is not supported");
}
if(name == Constants.REUSE_INSTANCE || name.equals(Constants.REUSE_INSTANCE)){
fReuseInstance = ((Boolean)value).booleanValue();
if(DEBUG)System.out.println("fReuseInstance is set to " + fReuseInstance);
}else{//for any other property set the flag
//REVISIT: Even in this case instance can be reused, by passing PropertyManager
fPropertyChanged = true;
}
fPropertyManager.setProperty(name,value);
}
XMLStreamReader getXMLStreamReaderImpl(XMLInputSource inputSource) throws javax.xml.stream.XMLStreamException{
//1. if the temp reader is null -- create the instance and return
if(fTempReader == null){
fPropertyChanged = false;
return fTempReader = new XMLStreamReaderImpl(inputSource,
new PropertyManager(fPropertyManager));
}
//if factory is configured to reuse the instance & this instance can be reused
//& the setProperty() hasn't been called
if(fReuseInstance && fTempReader.canReuse() && !fPropertyChanged){
if(DEBUG)System.out.println("Reusing the instance");
//we can make setInputSource() call reset() and this way there wont be two function calls
fTempReader.reset();
fTempReader.setInputSource(inputSource);
fPropertyChanged = false;
return fTempReader;
}else{
fPropertyChanged = false;
//just return the new instance.. note that we are not setting fTempReader to the newly created instance
return fTempReader = new XMLStreamReaderImpl(inputSource,
new PropertyManager(fPropertyManager));
}
}
XMLInputSource jaxpSourcetoXMLInputSource(Source source){
if(source instanceof StreamSource){
StreamSource stSource = (StreamSource)source;
String systemId = stSource.getSystemId();
String publicId = stSource.getPublicId();
InputStream istream = stSource.getInputStream();
Reader reader = stSource.getReader();
if(istream != null){
return new XMLInputSource(publicId, systemId, null, istream, null);
}
else if(reader != null){
return new XMLInputSource(publicId, systemId,null, reader, null);
}else{
return new XMLInputSource(publicId, systemId, null);
}
}
throw new UnsupportedOperationException("Cannot create " +
"XMLStreamReader or XMLEventReader from a " +
source.getClass().getName());
}
}//XMLInputFactoryImpl