1 files changed, 129 insertions, 0 deletions

diff --git a/src/cuchaz/enigma/mapping/MappingsReader.java b/src/cuchaz/enigma/mapping/MappingsReader.java
new file mode 100644
index 0000000..b039409
--- /dev/null
+++ b/src/cuchaz/enigma/mapping/MappingsReader.java
@@ -0,0 +1,129 @@
+/*******************************************************************************
+ * 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() );
+        }
+}