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Closure Compiler is a JavaScript optimizing compiler. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. It also checks syntax, variable references, and types, and warns about common JavaScript pitfalls. It is used in many of Google's JavaScript apps, including Gmail, Google Web Search, Google Maps, and Google Docs.

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/*
 * Copyright 2009 The Closure Compiler Authors.
 *
 * 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.javascript.jscomp.deps;

import com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.errorprone.annotations.Immutable;
import java.util.Collection;
import java.util.Map;

/**
 * A class to hold JS dependency information for a single .js file.
 */
@Immutable @AutoValue @AutoValue.CopyAnnotations
public abstract class SimpleDependencyInfo extends DependencyInfo.Base {

  public static Builder builder(String srcPathRelativeToClosure, String pathOfDefiningFile) {
    return new AutoValue_SimpleDependencyInfo.Builder()
        .setName(pathOfDefiningFile)
        .setPathRelativeToClosureBase(srcPathRelativeToClosure)
        .setProvides(ImmutableList.of())
        .setRequires(ImmutableList.of())
        .setTypeRequires(ImmutableList.of())
        .setLoadFlags(ImmutableMap.of())
        .setHasExternsAnnotation(false)
        .setHasNoCompileAnnotation(false);
  }

  /**
   * Builder for constructing instances of SimpleDependencyInfo.
   * Use the {@link SimpleDependencyInfo#builder(String, String)} method to create an instance.
   */
  @AutoValue.Builder
  public abstract static class Builder {
    public static Builder from(DependencyInfo copy) {
      return new AutoValue_SimpleDependencyInfo.Builder()
          .setName(copy.getName())
          .setPathRelativeToClosureBase(copy.getPathRelativeToClosureBase())
          .setProvides(copy.getProvides())
          .setRequires(copy.getRequires())
          .setTypeRequires(copy.getTypeRequires())
          .setLoadFlags(copy.getLoadFlags())
          .setHasExternsAnnotation(copy.getHasExternsAnnotation())
          .setHasNoCompileAnnotation(copy.getHasNoCompileAnnotation());
    }

    abstract Builder setName(String name);
    abstract Builder setPathRelativeToClosureBase(String srcPathRelativeToClosure);

    public abstract Builder setProvides(Collection provides);
    public abstract Builder setProvides(String... provides);

    public abstract Builder setRequires(Collection requires);

    public abstract Builder setRequires(Require... requires);

    public abstract Builder setTypeRequires(Collection typeRequires);

    public abstract Builder setTypeRequires(String... typeRequires);

    public abstract Builder setLoadFlags(Map loadFlags);

    public abstract Builder setHasExternsAnnotation(boolean hasExternsAnnotation);

    public abstract Builder setHasNoCompileAnnotation(boolean hasNoCompileAnnotation);

    private static final ImmutableMap GOOG_MODULE_FLAGS =
        ImmutableMap.of("module", "goog");

    public Builder setGoogModule(boolean isModule) {
      return setLoadFlags(isModule ? GOOG_MODULE_FLAGS : ImmutableMap.of());
    }

    public abstract SimpleDependencyInfo build();
  }

  public static final SimpleDependencyInfo EMPTY = builder("", "").build();
}