1 files changed, 51 insertions, 0 deletions
diff --git a/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/main/collectors/VarNamesCollector.java b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/main/collectors/VarNamesCollector.java
new file mode 100644
index 000000000000..dfde971ac628
--- /dev/null
+++ b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/main/collectors/VarNamesCollector.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2000-2014 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.
+ * 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.
+ */
+package org.jetbrains.java.decompiler.main.collectors;
+
+import java.util.HashSet;
+
+public class VarNamesCollector {
+
+  private HashSet<String> usedNames = new HashSet<String>();
+
+  public VarNamesCollector() {
+  }
+
+  public VarNamesCollector(HashSet<String> setNames) {
+    usedNames.addAll(setNames);
+  }
+
+  public void addName(String value) {
+    usedNames.add(value);
+  }
+
+  public String getFreeName(int index) {
+    return getFreeName("var" + index);
+  }
+
+  public String getFreeName(String proposition) {
+
+    while (usedNames.contains(proposition)) {
+      proposition += "x";
+    }
+    usedNames.add(proposition);
+    return proposition;
+  }
+
+  public HashSet<String> getUsedNames() {
+    return usedNames;
+  }
+}