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/*
* Distributed as part of mchange-commons-java v.0.2.3
*
* Copyright (C) 2012 Machinery For Change, Inc.
*
* Author: Steve Waldman
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1, as
* published by the Free Software Foundation.
*
* This software 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this software; see the file LICENSE. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
package com.mchange.v1.xmlprops;
import java.io.*;
import java.sql.*;
import java.util.*;
import org.xml.sax.*;
import com.mchange.v1.xml.StdErrErrorHandler;
import com.mchange.v1.util.StringTokenizerUtils;
public class SaxXmlPropsParser
{
final static String DEFAULT_XML_READER = "org.apache.xerces.parsers.SAXParser";
final static String XMLPROPS_NAMESPACE_URI = "http://www.mchange.com/namespaces/xmlprops";
public static Properties parseXmlProps(InputStream istr) throws XmlPropsException
{
try
{
//TODO: let a system property or somesuch determine the
// XMLReader class...
String readerClass = DEFAULT_XML_READER;
XMLReader reader = (XMLReader) Class.forName( readerClass ).newInstance();
InputSource is = new InputSource( istr );
return parseXmlProps( is, reader, null, null);
}
catch (XmlPropsException e)
{ throw e; }
catch (Exception e)
{
e.printStackTrace();
throw new XmlPropsException("Exception while instantiating XMLReader.", e);
}
}
private static Properties parseXmlProps(InputSource is, XMLReader saxy,
EntityResolver eresolv, ErrorHandler grrr)
throws XmlPropsException
{
try
{
if (eresolv != null)
saxy.setEntityResolver( eresolv );
if (grrr == null)
grrr = new StdErrErrorHandler();
saxy.setErrorHandler( grrr );
XmlPropsContentHandler fsch = new XmlPropsContentHandler();
saxy.setContentHandler( fsch );
saxy.parse(is);
return fsch.getLastProperties();
}
catch (Exception e)
{
if (e instanceof SAXException)
{
((SAXException) e).getException().printStackTrace();
}
e.printStackTrace();
throw new XmlPropsException(e);
}
}
//we presume that the xml is being validated by the parser
//here, and do not double-check constraints defined by the DTD
static class XmlPropsContentHandler implements ContentHandler
{
Locator locator;
Properties props;
String name;
StringBuffer valueBuf;
public void setDocumentLocator(Locator locator)
{ this.locator = locator; }
public void startDocument() throws SAXException
{
props = new Properties();
}
public void startElement(String namespaceURI, String localName, String qName, Attributes atts)
{
System.err.println("--> startElement( " + namespaceURI + ", " + localName + ", " + atts + ")");
if (!namespaceURI.equals("") && !namespaceURI.equals( XMLPROPS_NAMESPACE_URI ))
return;
if (localName.equals( "property" ))
{
name = atts.getValue( namespaceURI, "name" );
valueBuf = new StringBuffer();
}
}
public void characters(char[] ch, int start, int length) throws SAXException
{
if (valueBuf != null)
valueBuf.append(ch, start, length);
}
public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException
{
if (valueBuf != null)
valueBuf.append(ch, start, length);
}
public void endElement(String namespaceURI, String localName, String qName) throws SAXException
{
if (!namespaceURI.equals("") && !namespaceURI.equals( XMLPROPS_NAMESPACE_URI ))
return;
if ( localName.equals( "property" ) )
{
System.err.println("NAME: " + name);
props.put(name, valueBuf.toString());
valueBuf = null;
}
}
public void endDocument() throws SAXException
{}
public void startPrefixMapping(String prefix, String uri) throws SAXException
{}
public void endPrefixMapping(String prefix) throws SAXException
{}
public void processingInstruction(String target, String data) throws SAXException
{}
public void skippedEntity(String name) throws SAXException
{}
public Properties getLastProperties()
{ return props; }
}
public static void main(String[] argv)
{
try
{
InputStream is = new BufferedInputStream( new FileInputStream( argv[0] ) );
SaxXmlPropsParser parser = new SaxXmlPropsParser();
Properties props = parser.parseXmlProps( is );
for (Iterator ii = props.keySet().iterator(); ii.hasNext(); )
{
String key = (String) ii.next();
String value = props.getProperty(key);
System.err.println(key + '=' + value);
}
}
catch (Exception e)
{ e.printStackTrace(); }
}
}
