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/*
* $Id: SAXSource.java,v 1.1 2003-02-01 02:10:28 cbj Exp $
* Copyright (C) 2001 Andrew Selkirk
* Copyright (C) 2001 David Brownell
*
* This file is part of GNU JAXP, a library.
*
* GNU JAXP is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNU JAXP is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* As a special exception, if you link this library with other files to
* produce an executable, this library does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* This exception does not however invalidate any other reasons why the
* executable file might be covered by the GNU General Public License.
*/
package javax.xml.transform.sax;
import org.xml.sax.XMLReader;
import org.xml.sax.InputSource;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
/**
* Acts as a holder for "pull style" inputs to an XSLT transform.
* SAX based transforms can support a second style of inputs,
* driving by a {@link TransformerHandler} as output of some
* other SAX processing pipeline. stage.
*
* @see SAXTransformerFactory#newTransformerHandler
*
* @author Andrew Selkirk, David Brownell
* @version 1.0
*/
public class SAXSource implements Source
{
/**
* Used with <em>TransformerFactory.getFeature()</em> to determine
* whether the transformers it produces support SAXSource objects
* (possibly without URIs) as inputs.
*/
public static final String FEATURE =
"http://javax.xml.transform.sax.SAXSource/feature";
private XMLReader reader = null;
private InputSource inputSource = null;
//-------------------------------------------------------------
// Initialization ---------------------------------------------
//-------------------------------------------------------------
public SAXSource() {
} // SAXSource()
public SAXSource(XMLReader reader, InputSource source) {
this.reader = reader;
this.inputSource = source;
} // SAXSource()
public SAXSource(InputSource source) {
this.inputSource = source;
} // SAXSource()
//-------------------------------------------------------------
// Methods ----------------------------------------------------
//-------------------------------------------------------------
public void setXMLReader(XMLReader reader) {
this.reader = reader;
} // setXMLReader()
public XMLReader getXMLReader() {
return reader;
} // getXMLReader()
public void setInputSource(InputSource source) {
this.inputSource = source;
} // setInputSource()
public InputSource getInputSource() {
return inputSource;
} // inputSource()
public void setSystemId(String systemID) {
if (inputSource != null) {
inputSource.setSystemId(systemID);
}
} // setSystemId()
public String getSystemId() {
if (inputSource != null) {
return inputSource.getSystemId();
} // if
return null;
} // getSystemId()
/**
* Creates a SAX input source from its argument.
* Understands StreamSource and System ID based input sources,
* and insists on finding either a system ID (URI) or some kind
* of input stream (character or byte).
*
* @param in TRAX style input source
* @return SAX input source, or null if one could not be
* created.
*/
public static InputSource sourceToInputSource (Source in)
{
InputSource retval;
boolean ok = false;
if (in.getSystemId () != null) {
retval = new InputSource (in.getSystemId ());
ok = true;
} else
retval = new InputSource ();
if (in instanceof StreamSource) {
StreamSource ss = (StreamSource) in;
if (ss.getReader () != null) {
retval.setCharacterStream (ss.getReader ());
ok = true;
} else if (ss.getInputStream () != null) {
retval.setByteStream (ss.getInputStream ());
ok = true;
}
if (ss.getPublicId () != null)
retval.setPublicId (ss.getPublicId ());
}
return ok ? retval : null;
}
}
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