Interner

platform/util/src/com/intellij/util/containers/Interner.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2000-2013 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 com.intellij.util.containers;
+
+import org.jetbrains.annotations.NotNull;
+
+public class Interner<T> {
+
+  private final OpenTHashSet<T> mySet = new OpenTHashSet<T>();
+
+  @NotNull
+  public T intern(@NotNull T name) {
+    T interned = mySet.get(name);
+    if (interned != null) {
+      return interned;
+    }
+
+    boolean added = mySet.add(name);
+    assert added;
+
+    return name;
+  }
+
+  public void clear() {
+    mySet.clear();
+  }
+
+}

platform/util/src/com/intellij/util/containers/StringInterner.java

@@ -15,28 +15,9 @@
  */
 package com.intellij.util.containers;
 
-import org.jetbrains.annotations.NotNull;
-
 /**
  * @author max
  */
-public class StringInterner {
-  private final OpenTHashSet<String> mySet = new OpenTHashSet<String>();
+public class StringInterner extends Interner<String> {
 
-  @NotNull
-  public String intern(@NotNull String name) {
-    String interned = mySet.get(name);
-    if (interned != null) {
-      return interned;
-    }
-
-    boolean added = mySet.add(name);
-    assert added;
-
-    return name;
-  }
-
-  public void clear() {
-    mySet.clear();
-  }
 }