com.google.idea.blaze.base.projectview.ProjectViewSet.java Source code

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Here is the source code for com.google.idea.blaze.base.projectview.ProjectViewSet.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.projectview;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.idea.blaze.base.projectview.section.ListSection;
import com.google.idea.blaze.base.projectview.section.ScalarSection;
import com.google.idea.blaze.base.projectview.section.Section;
import com.google.idea.blaze.base.projectview.section.SectionKey;
import java.io.File;
import java.io.Serializable;
import java.util.Collection;
import java.util.List;
import javax.annotation.Nullable;

/** A collection of project views and their file names. */
public final class ProjectViewSet implements Serializable {
    private static final long serialVersionUID = 2L;

    private final ImmutableList<ProjectViewFile> projectViewFiles;

    public ProjectViewSet(ImmutableList<ProjectViewFile> projectViewFiles) {
        this.projectViewFiles = projectViewFiles;
    }

    /** Returns all values from all list sections in the project views, in order */
    public <T> List<T> listItems(SectionKey<T, ListSection<T>> key) {
        List<T> result = Lists.newArrayList();
        for (ListSection<T> section : getSections(key)) {
            result.addAll(section.items());
        }
        return result;
    }

    /** Returns all values from all scalar sections in the project views, in order */
    public <T> List<T> listScalarItems(SectionKey<T, ScalarSection<T>> key) {
        List<T> result = Lists.newArrayList();
        for (ScalarSection<T> section : getSections(key)) {
            result.add(section.getValue());
        }
        return result;
    }

    /** Gets the last value from any scalar sections */
    @Nullable
    public <T> T getScalarValue(SectionKey<T, ScalarSection<T>> key) {
        return getScalarValue(key, null);
    }

    /** Gets the last value from any scalar sections */
    public <T> T getScalarValue(SectionKey<T, ScalarSection<T>> key, T defaultValue) {
        Collection<ScalarSection<T>> sections = getSections(key);
        if (sections.isEmpty()) {
            return defaultValue;
        } else {
            return Iterables.getLast(sections).getValue();
        }
    }

    public <T, SectionType extends Section<T>> Collection<SectionType> getSections(SectionKey<T, SectionType> key) {
        List<SectionType> result = Lists.newArrayList();
        for (ProjectViewFile projectViewFile : projectViewFiles) {
            ProjectView projectView = projectViewFile.projectView;
            result.addAll(projectView.getSectionsOfType(key));
        }
        return result;
    }

    public Collection<ProjectViewFile> getProjectViewFiles() {
        return projectViewFiles;
    }

    @Nullable
    public ProjectViewFile getTopLevelProjectViewFile() {
        return !projectViewFiles.isEmpty() ? projectViewFiles.get(projectViewFiles.size() - 1) : null;
    }

    /** A project view/file pair */
    public static class ProjectViewFile implements Serializable {
        private static final long serialVersionUID = 1L;
        public final ProjectView projectView;
        @Nullable
        public final File projectViewFile;

        public ProjectViewFile(ProjectView projectView, @Nullable File projectViewFile) {
            this.projectView = projectView;
            this.projectViewFile = projectViewFile;
        }
    }

    public static Builder builder() {
        return new Builder();
    }

    /** Builder for a project view */
    public static class Builder {
        ImmutableList.Builder<ProjectViewFile> projectViewFiles = ImmutableList.builder();

        public Builder add(ProjectView projectView) {
            return add(null, projectView);
        }

        public Builder add(@Nullable File projectViewFile, ProjectView projectView) {
            projectViewFiles.add(new ProjectViewFile(projectView, projectViewFile));
            return this;
        }

        public Builder addAll(Collection<ProjectViewFile> projectViewFiles) {
            this.projectViewFiles.addAll(projectViewFiles);
            return this;
        }

        public ProjectViewSet build() {
            return new ProjectViewSet(projectViewFiles.build());
        }
    }
}