platform/platform-impl/src/com/intellij/ide/impl/TypeSafeDataProviderAdapter.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 /*
  18  * Created by IntelliJ IDEA.
  19  * User: yole
  20  * Date: 25.10.2006
  21  * Time: 17:24:41
  22  */
  23 package com.intellij.ide.impl;
  24
  25 import com.intellij.openapi.actionSystem.DataKey;
  26 import com.intellij.openapi.actionSystem.DataProvider;
  27 import com.intellij.openapi.actionSystem.DataSink;
  28 import com.intellij.openapi.actionSystem.TypeSafeDataProvider;
  29 import org.jetbrains.annotations.NonNls;
  30 import org.jetbrains.annotations.Nullable;
  31
  32 public class TypeSafeDataProviderAdapter implements DataProvider, DataSink {
  33   private final TypeSafeDataProvider myProvider;
  34   private DataKey myLastKey = null;
  35   private Object myValue = null;
  36
  37   public TypeSafeDataProviderAdapter(final TypeSafeDataProvider provider) {
  38     myProvider = provider;
  39   }
  40
  41   @Nullable
  42   synchronized public Object getData(@NonNls String dataId) {
  43     myValue = null;
  44     myLastKey = DataKey.create(dataId);
  45     myProvider.calcData(myLastKey, this);
  46     return myValue;
  47   }
  48
  49   synchronized public <T> void put(DataKey<T> key, T data) {
  50     if (key == myLastKey) {
  51       myValue = data;
  52     }
  53   }
  54
  55   @Override
  56   public String toString() {
  57     return super.toString()+'('+ myProvider + ')';
  58   }
  59 }