com.google.idea.blaze.base.rulemaps.SourceToRuleMapImpl.java Source code

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Here is the source code for com.google.idea.blaze.base.rulemaps.SourceToRuleMapImpl.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.base.rulemaps;

import com.google.common.collect.ImmutableCollection;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMultimap;
import com.google.idea.blaze.base.ideinfo.ArtifactLocation;
import com.google.idea.blaze.base.ideinfo.RuleIdeInfo;
import com.google.idea.blaze.base.model.BlazeProjectData;
import com.google.idea.blaze.base.model.primitives.Label;
import com.google.idea.blaze.base.projectview.ProjectViewSet;
import com.google.idea.blaze.base.settings.BlazeImportSettings;
import com.google.idea.blaze.base.sync.SyncListener;
import com.google.idea.blaze.base.sync.data.BlazeProjectDataManager;
import com.intellij.openapi.components.ServiceManager;
import com.intellij.openapi.project.Project;

import javax.annotation.Nullable;
import java.io.File;

/**
 * Maps source files to their respective targets
 */
public class SourceToRuleMapImpl implements SourceToRuleMap {
    private final Project project;
    private ImmutableMultimap<File, Label> sourceToTargetMap;

    public static SourceToRuleMapImpl getImpl(Project project) {
        return (SourceToRuleMapImpl) ServiceManager.getService(project, SourceToRuleMap.class);
    }

    public SourceToRuleMapImpl(Project project) {
        this.project = project;
    }

    @Override
    public ImmutableCollection<Label> getTargetsForSourceFile(File file) {
        ImmutableMultimap<File, Label> sourceToTargetMap = getSourceToTargetMap();
        return sourceToTargetMap != null ? sourceToTargetMap.get(file) : ImmutableList.of();
    }

    @Nullable
    private synchronized ImmutableMultimap<File, Label> getSourceToTargetMap() {
        if (this.sourceToTargetMap == null) {
            this.sourceToTargetMap = initSourceToTargetMap();
        }
        return this.sourceToTargetMap;
    }

    private synchronized void clearSourceToTargetMap() {
        this.sourceToTargetMap = null;
    }

    @Nullable
    private ImmutableMultimap<File, Label> initSourceToTargetMap() {
        BlazeProjectData blazeProjectData = BlazeProjectDataManager.getInstance(project).getBlazeProjectData();
        if (blazeProjectData == null) {
            return null;
        }
        ImmutableMultimap.Builder<File, Label> sourceToTargetMap = ImmutableMultimap.builder();
        for (RuleIdeInfo rule : blazeProjectData.ruleMap.values()) {
            Label label = rule.label;
            for (ArtifactLocation sourceArtifact : rule.sources) {
                sourceToTargetMap.put(sourceArtifact.getFile(), label);
            }
        }
        return sourceToTargetMap.build();
    }

    static class ClearSourceToTargetMap extends SyncListener.Adapter {
        @Override
        public void onSyncComplete(Project project, BlazeImportSettings importSettings,
                ProjectViewSet projectViewSet, BlazeProjectData blazeProjectData) {
            getImpl(project).clearSourceToTargetMap();
        }
    }
}