package org.codehaus.plexus.util.xml;
/*
* Copyright The Codehaus Foundation.
*
* 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.
*/
import org.codehaus.plexus.util.IOUtil;
import org.codehaus.plexus.util.xml.pull.MXParser;
import org.codehaus.plexus.util.xml.pull.XmlPullParser;
import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.ArrayList;
import java.util.List;
/**
* @version $Id$
*/
public class Xpp3DomBuilder
{
private static final boolean DEFAULT_TRIM = true;
public static Xpp3Dom build( Reader reader )
throws XmlPullParserException, IOException
{
return build( reader, DEFAULT_TRIM );
}
public static Xpp3Dom build( InputStream is, String encoding )
throws XmlPullParserException, IOException
{
return build( is, encoding, DEFAULT_TRIM );
}
public static Xpp3Dom build( InputStream is, String encoding, boolean trim )
throws XmlPullParserException, IOException
{
XmlPullParser parser = new MXParser();
parser.setInput( is, encoding );
try
{
return build( parser, trim );
}
finally
{
IOUtil.close( is );
}
}
public static Xpp3Dom build( Reader reader, boolean trim )
throws XmlPullParserException, IOException
{
XmlPullParser parser = new MXParser();
parser.setInput( reader );
try
{
return build( parser, trim );
}
finally
{
IOUtil.close( reader );
}
}
public static Xpp3Dom build( XmlPullParser parser )
throws XmlPullParserException, IOException
{
return build( parser, DEFAULT_TRIM );
}
public static Xpp3Dom build( XmlPullParser parser, boolean trim )
throws XmlPullParserException, IOException
{
List elements = new ArrayList();
List values = new ArrayList();
int eventType = parser.getEventType();
while ( eventType != XmlPullParser.END_DOCUMENT )
{
if ( eventType == XmlPullParser.START_TAG )
{
String rawName = parser.getName();
Xpp3Dom childConfiguration = new Xpp3Dom( rawName );
int depth = elements.size();
if ( depth > 0 )
{
Xpp3Dom parent = (Xpp3Dom) elements.get( depth - 1 );
parent.addChild( childConfiguration );
}
elements.add( childConfiguration );
if ( parser.isEmptyElementTag() )
{
values.add( null );
}
else
{
values.add( new StringBuffer() );
}
int attributesSize = parser.getAttributeCount();
for ( int i = 0; i < attributesSize; i++ )
{
String name = parser.getAttributeName( i );
String value = parser.getAttributeValue( i );
childConfiguration.setAttribute( name, value );
}
}
else if ( eventType == XmlPullParser.TEXT )
{
int depth = values.size() - 1;
StringBuffer valueBuffer = (StringBuffer) values.get( depth );
String text = parser.getText();
if ( trim )
{
text = text.trim();
}
valueBuffer.append( text );
}
else if ( eventType == XmlPullParser.END_TAG )
{
int depth = elements.size() - 1;
Xpp3Dom finishedConfiguration = (Xpp3Dom) elements.remove( depth );
/* this Object could be null if it is a singleton tag */
Object accumulatedValue = values.remove( depth );
if ( finishedConfiguration.getChildCount() == 0 )
{
if ( accumulatedValue == null )
{
finishedConfiguration.setValue( null );
}
else
{
finishedConfiguration.setValue( accumulatedValue.toString() );
}
}
if ( depth == 0 )
{
return finishedConfiguration;
}
}
eventType = parser.next();
}
throw new IllegalStateException( "End of document found before returning to 0 depth" );
}
}