Cleanup (minor optimization)

src/org/jetbrains/java/decompiler/main/collectors/BytecodeMappingTracer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2015 JetBrains s.r.o.
+ * Copyright 2000-2016 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,8 @@ import java.util.*;
 import java.util.Map.Entry;
 
 public class BytecodeMappingTracer {
+  public static final BytecodeMappingTracer DUMMY = new BytecodeMappingTracer();
+
   private int currentSourceLine;
   private StructLineNumberTableAttribute lineNumberTable = null;
   private final Map<Integer, Integer> mapping = new HashMap<Integer, Integer>();  // bytecode offset, source line

src/org/jetbrains/java/decompiler/modules/decompiler/exps/Exprent.java

@@ -15,13 +15,6 @@
  */
 package org.jetbrains.java.decompiler.modules.decompiler.exps;
 
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map.Entry;
-import java.util.Set;
-
 import org.jetbrains.java.decompiler.main.DecompilerContext;
 import org.jetbrains.java.decompiler.main.TextBuffer;
 import org.jetbrains.java.decompiler.main.collectors.BytecodeMappingTracer;
@@ -34,8 +27,10 @@ import org.jetbrains.java.decompiler.struct.match.MatchEngine;
 import org.jetbrains.java.decompiler.struct.match.MatchNode;
 import org.jetbrains.java.decompiler.struct.match.MatchNode.RuleValue;
 
-public class Exprent implements IMatchable {
+import java.util.*;
+import java.util.Map.Entry;
 
+public class Exprent implements IMatchable {
   public static final int MULTIPLE_USES = 1;
   public static final int SIDE_EFFECTS_FREE = 2;
   public static final int BOTH_FLAGS = 3;
@@ -145,14 +140,13 @@ public class Exprent implements IMatchable {
   // IMatchable implementation
   // *****************************************************************************
 
+  @Override
   public IMatchable findObject(MatchNode matchNode, int index) {
-    
     if (matchNode.getType() != MatchNode.MATCHNODE_EXPRENT) {
       return null;
     }
 
     List<Exprent> lstAllExprents = getAllExprents();
-    
     if (lstAllExprents == null || lstAllExprents.isEmpty()) {
       return null;
     }
@@ -160,35 +154,31 @@ public class Exprent implements IMatchable {
     String position = (String)matchNode.getRuleValue(MatchProperties.EXPRENT_POSITION);
     if (position != null) {
       if (position.matches("-?\\d+")) {
-        return lstAllExprents.get((lstAllExprents.size() + Integer.parseInt(position)) % lstAllExprents.size()); // care for negative positions
+        return lstAllExprents
+          .get((lstAllExprents.size() + Integer.parseInt(position)) % lstAllExprents.size()); // care for negative positions
+      }
     }
-    } else if(index < lstAllExprents.size()) { // use 'index' parameter
+    else if (index < lstAllExprents.size()) { // use 'index' parameter
       return lstAllExprents.get(index);
     }
 
     return null;
   }
 
+  @Override
   public boolean match(MatchNode matchNode, MatchEngine engine) {
-    
     if (matchNode.getType() != MatchNode.MATCHNODE_EXPRENT) {
       return false;
     }
 
     for (Entry<MatchProperties, RuleValue> rule : matchNode.getRules().entrySet()) {
-      switch(rule.getKey()) {
-      case EXPRENT_TYPE:
-        if(this.type != ((Integer)rule.getValue().value).intValue()) {
+      MatchProperties key = rule.getKey();
+      if (key == MatchProperties.EXPRENT_TYPE && this.type != ((Integer)rule.getValue().value).intValue()) {
         return false;
       }
-        break;
-      case EXPRENT_RET:
-        if(!engine.checkAndSetVariableValue((String)rule.getValue().value, this)) {
+      if (key == MatchProperties.EXPRENT_RET && !engine.checkAndSetVariableValue((String)rule.getValue().value, this)) {
         return false;
       }
-        break;
-      }
-      
     }
 
     return true;
@@ -196,6 +186,6 @@ public class Exprent implements IMatchable {
 
   @Override
   public String toString() {
-    return toJava(0, new BytecodeMappingTracer()).toString();
+    return toJava(0, BytecodeMappingTracer.DUMMY).toString();
   }
 }

src/org/jetbrains/java/decompiler/modules/decompiler/stats/Statement.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2015 JetBrains s.r.o.
+ * Copyright 2000-2016 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -494,11 +494,6 @@ public class Statement implements IMatchable {
     return false;
   }
 
-  // to be overwritten
-  public TextBuffer toJava() {
-    return toJava(0, new BytecodeMappingTracer());
-  }
-
   public TextBuffer toJava(int indent, BytecodeMappingTracer tracer) {
     throw new RuntimeException("not implemented");
   }