| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * 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.android.tools.idea.databinding; |
| |
| import com.android.tools.idea.rendering.LocalResourceRepository; |
| import com.intellij.openapi.util.ModificationTracker; |
| import com.intellij.psi.util.CachedValueProvider; |
| import org.jetbrains.android.facet.AndroidFacet; |
| import org.jetbrains.annotations.NotNull; |
| |
| abstract public class ResourceCacheValueProvider<T> implements CachedValueProvider<T>, ModificationTracker { |
| ModificationTracker[] myAdditionalTrackers; |
| private ModificationTracker myTracker = new ModificationTracker() { |
| private long myLastVersion = -1; |
| private long myVersion = 0; |
| @Override |
| public long getModificationCount() { |
| LocalResourceRepository moduleResources = myFacet.getModuleResources(false); |
| // make sure it changes if facet's module resource availability changes |
| long version = moduleResources == null ? Integer.MIN_VALUE : moduleResources.getModificationCount(); |
| if (version != myLastVersion) { |
| myLastVersion = version; |
| myVersion ++; |
| } |
| return myVersion; |
| } |
| }; |
| private final AndroidFacet myFacet; |
| |
| public ResourceCacheValueProvider(AndroidFacet facet, ModificationTracker... additionalTrackers) { |
| myFacet = facet; |
| myAdditionalTrackers = additionalTrackers; |
| } |
| |
| public AndroidFacet getFacet() { |
| return myFacet; |
| } |
| |
| @Override |
| public long getModificationCount() { |
| return myTracker.getModificationCount(); |
| } |
| |
| @NotNull |
| @Override |
| public final Result<T> compute() { |
| if (myFacet.getModuleResources(false) == null) { |
| return Result.create(defaultValue(), myTracker); |
| } |
| return Result.create(doCompute(), myTracker); |
| } |
| |
| abstract T doCompute(); |
| |
| abstract T defaultValue(); |
| } |
| |