1 files changed, 57 insertions, 0 deletions

diff --git a/src/cuchaz/enigma/analysis/SourceIndex.java b/src/cuchaz/enigma/analysis/SourceIndex.java
new file mode 100644
index 0000000..a4b5329
--- /dev/null
+++ b/src/cuchaz/enigma/analysis/SourceIndex.java
@@ -0,0 +1,57 @@
+/*******************************************************************************
+ * 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.analysis;
+
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+
+import jsyntaxpane.Token;
+
+import com.google.common.collect.BiMap;
+import com.google.common.collect.HashBiMap;
+
+public class SourceIndex implements Iterable<Map.Entry<Object,Token>>
+{
+        private BiMap<Object,Token> m_entryToToken;
+        private BiMap<Token,Object> m_tokenToEntry;
+        
+        public SourceIndex( )
+        {
+                m_entryToToken = HashBiMap.create();
+                m_tokenToEntry = m_entryToToken.inverse();
+        }
+        
+        public void add( Object entry, Token token )
+        {
+                m_entryToToken.put( entry, token );
+        }
+        
+        public Iterator<Map.Entry<Object,Token>> iterator( )
+        {
+                return m_entryToToken.entrySet().iterator();
+        }
+        
+        public Set<Token> tokens( )
+        {
+                return m_entryToToken.values();
+        }
+        
+        public Object getEntry( Token token )
+        {
+                return m_tokenToEntry.get( token );
+        }
+        
+        public Object getToken( Object entry )
+        {
+                return m_entryToToken.get( entry );
+        }
+}