com.google.idea.blaze.java.sync.JavaLanguageLevelHelper.java Source code

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Here is the source code for com.google.idea.blaze.java.sync.JavaLanguageLevelHelper.java

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/*
 * Copyright 2016 The Bazel Authors. All rights reserved.
 *
 * 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.google.idea.blaze.java.sync;

import com.google.common.base.Strings;
import com.google.idea.blaze.base.model.BlazeProjectData;
import com.google.idea.blaze.base.projectview.ProjectViewSet;
import com.google.idea.blaze.java.projectview.JavaLanguageLevelSection;
import com.google.idea.blaze.java.sync.model.BlazeJavaSyncData;
import com.intellij.pom.java.LanguageLevel;

/** Called by sync plugins to determine the appropriate java language level. */
public class JavaLanguageLevelHelper {

    public static LanguageLevel getJavaLanguageLevel(ProjectViewSet projectViewSet,
            BlazeProjectData blazeProjectData, LanguageLevel defaultLanguageLevel) {

        defaultLanguageLevel = getLanguageLevelFromToolchain(blazeProjectData, defaultLanguageLevel);
        return JavaLanguageLevelSection.getLanguageLevel(projectViewSet, defaultLanguageLevel);
    }

    private static LanguageLevel getLanguageLevelFromToolchain(BlazeProjectData blazeProjectData,
            LanguageLevel defaultLanguageLevel) {
        BlazeJavaSyncData blazeJavaSyncData = blazeProjectData.syncState.get(BlazeJavaSyncData.class);
        if (blazeJavaSyncData != null) {
            String sourceVersion = blazeJavaSyncData.importResult.sourceVersion;
            if (!Strings.isNullOrEmpty(sourceVersion)) {
                switch (sourceVersion) {
                case "6":
                    return LanguageLevel.JDK_1_6;
                case "7":
                    return LanguageLevel.JDK_1_7;
                case "8":
                    return LanguageLevel.JDK_1_8;
                case "9":
                    return LanguageLevel.JDK_1_9;
                }
            }
        }
        return defaultLanguageLevel;
    }
}