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/*******************************************************************************
* Copyright (c) 2014 Jeff Martin.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Public License v3.0
* which accompanies this distribution, and is available at
* http://www.gnu.org/licenses/gpl.html
*
* Contributors:
* Jeff Martin - initial API and implementation
******************************************************************************/
package cuchaz.enigma.mapping;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import java.util.NoSuchElementException;
import java.util.Scanner;
import cuchaz.enigma.Util;
public class MappingsReader
{
public Mappings read( Reader in )
throws IOException
{
return read( new BufferedReader( in ) );
}
public Mappings read( BufferedReader in )
throws IOException
{
Mappings mappings = new Mappings();
ClassMapping classMapping = null;
MethodMapping methodMapping = null;
int lineNumber = 0;
String line = null;
while( ( line = in.readLine() ) != null )
{
lineNumber++;
// strip comments
int commentPos = line.indexOf( '#' );
if( commentPos >= 0 )
{
line = line.substring( 0, commentPos );
}
// skip blank lines
line = line.trim();
if( line.length() <= 0 )
{
continue;
}
Scanner scanner = new Scanner( line );
try
{
while( scanner.hasNext() )
{
// read the first token
String token = scanner.next();
if( token.equalsIgnoreCase( "CLASS" ) )
{
classMapping = readClass( scanner );
mappings.addClassMapping( classMapping );
methodMapping = null;
}
else if( token.equalsIgnoreCase( "FIELD" ) )
{
if( classMapping == null )
{
throw new IllegalArgumentException( "Line " + lineNumber + ": Unexpected FIELD entry here!" );
}
classMapping.addFieldMapping( readField( scanner ) );
}
else if( token.equalsIgnoreCase( "METHOD" ) )
{
if( classMapping == null )
{
throw new IllegalArgumentException( "Line " + lineNumber + ": Unexpected METHOD entry here!" );
}
methodMapping = readMethod( scanner );
classMapping.addMethodMapping( methodMapping );
}
else if( token.equalsIgnoreCase( "ARG" ) )
{
if( classMapping == null || methodMapping == null )
{
throw new IllegalArgumentException( "Line " + lineNumber + ": Unexpected ARG entry here!" );
}
methodMapping.addArgumentMapping( readArgument( scanner ) );
}
}
}
catch( NoSuchElementException ex )
{
throw new IllegalArgumentException( "Line " + lineNumber + ": malformed line!" );
}
finally
{
Util.closeQuietly( scanner );
}
}
return mappings;
}
private ArgumentMapping readArgument( Scanner scanner )
{
return new ArgumentMapping( scanner.nextInt(), scanner.next() );
}
private ClassMapping readClass( Scanner scanner )
{
return new ClassMapping( scanner.next(), scanner.next() );
}
private FieldMapping readField( Scanner scanner )
{
return new FieldMapping( scanner.next(), scanner.next() );
}
private MethodMapping readMethod( Scanner scanner )
{
return new MethodMapping( scanner.next(), scanner.next(), scanner.next(), scanner.next() );
}
}
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