| /* |
| * 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.gradle.customizer.java; |
| |
| import com.android.tools.idea.gradle.IdeaAndroidProject; |
| import com.android.tools.idea.gradle.IdeaJavaProject; |
| import com.android.tools.idea.gradle.customizer.ModuleCustomizer; |
| import com.google.common.collect.Lists; |
| import com.intellij.openapi.module.Module; |
| import com.intellij.openapi.module.ModuleManager; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.roots.LanguageLevelModuleExtensionImpl; |
| import com.intellij.openapi.roots.ModifiableRootModel; |
| import com.intellij.pom.java.LanguageLevel; |
| import org.jetbrains.android.facet.AndroidFacet; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.List; |
| |
| import static com.intellij.openapi.module.ModuleUtilCore.getAllDependentModules; |
| import static com.intellij.pom.java.LanguageLevel.JDK_1_6; |
| import static com.intellij.pom.java.LanguageLevel.JDK_1_8; |
| |
| /** |
| * Configures Java SDK for Java library module. |
| */ |
| public class JavaLanguageLevelModuleCustomizer implements ModuleCustomizer<IdeaJavaProject> { |
| @Override |
| public void customizeModule(@NotNull Project project, @NotNull ModifiableRootModel moduleModel, @Nullable IdeaJavaProject javaModel) { |
| if (javaModel == null) { |
| return; |
| } |
| LanguageLevel languageLevel = javaModel.getJavaLanguageLevel(); |
| |
| if (isNotSupported(languageLevel)) { |
| // Java language 1.8 is not supported, fall back to the minimum Java language level in dependent modules. |
| List<Module> dependents = getAllDependentModules(moduleModel.getModule()); |
| languageLevel = getMinimumLanguageLevelForAndroidModules(dependents.toArray(new Module[dependents.size()])); |
| } |
| |
| if (isNotSupported(languageLevel)) { |
| // Java language is still not correct. Most likely this module does not have dependents. |
| // Get minimum language level from all Android modules. |
| Module[] modules = ModuleManager.getInstance(project).getModules(); |
| languageLevel = getMinimumLanguageLevelForAndroidModules(modules); |
| } |
| |
| if (isNotSupported(languageLevel)) { |
| languageLevel = JDK_1_6; // The minimum safe Java language level. |
| } |
| |
| moduleModel.getModuleExtension(LanguageLevelModuleExtensionImpl.class).setLanguageLevel(languageLevel); |
| } |
| |
| private static boolean isNotSupported(@Nullable LanguageLevel languageLevel) { |
| return languageLevel == null || languageLevel.compareTo(JDK_1_8) >= 0; |
| } |
| |
| @Nullable |
| private static LanguageLevel getMinimumLanguageLevelForAndroidModules(@NotNull Module[] modules) { |
| if (modules.length == 0) { |
| return null; |
| } |
| |
| LanguageLevel result = null; |
| |
| List<LanguageLevel> languageLevels = Lists.newArrayList(); |
| for (Module dependency : modules) { |
| LanguageLevel dependencyLanguageLevel = getLanguageLevelForAndroidModule(dependency); |
| if (dependencyLanguageLevel != null) { |
| languageLevels.add(dependencyLanguageLevel); |
| } |
| } |
| |
| for (LanguageLevel dependencyLanguageLevel : languageLevels) { |
| if (result == null || result.compareTo(dependencyLanguageLevel) > 0) { |
| result = dependencyLanguageLevel; |
| } |
| } |
| |
| return result; |
| } |
| |
| @Nullable |
| private static LanguageLevel getLanguageLevelForAndroidModule(@NotNull Module module) { |
| AndroidFacet facet = AndroidFacet.getInstance(module); |
| if (facet != null) { |
| IdeaAndroidProject androidModel = facet.getAndroidModel(); |
| if (androidModel != null) { |
| return androidModel.getJavaLanguageLevel(); |
| } |
| } |
| return null; |
| } |
| } |