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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. This binary checks for style issues such as incorrect or missing JSDoc usage, and missing goog.require() statements. It does not do more advanced checks such as typechecking.

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/*
 * Copyright 2018 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.modules;

import com.google.common.collect.ImmutableMap;
import com.google.javascript.jscomp.deps.ModuleLoader;
import javax.annotation.Nullable;

/**
 * A map containing information about all modules in the compilation.
 *
 * This is currently used for ES modules and other types of module are not processed in detail.
 */
public final class ModuleMap {
  private final ImmutableMap resolvedModules;
  private final ImmutableMap resolvedClosureModules;

  public ModuleMap(
      ImmutableMap resolvedModules,
      ImmutableMap resolvedClosureModules) {
    this.resolvedModules = resolvedModules;
    this.resolvedClosureModules = resolvedClosureModules;
  }

  @Nullable
  public Module getModule(String moduleName) {
    return resolvedModules.get(moduleName);
  }

  @Nullable
  public Module getModule(ModuleLoader.ModulePath path) {
    return getModule(path.toModuleName());
  }

  public ImmutableMap getModulesByPath() {
    return resolvedModules;
  }

  public ImmutableMap getModulesByClosureNamespace() {
    return resolvedClosureModules;
  }

  @Nullable
  public Module getClosureModule(String namespace) {
    return resolvedClosureModules.get(namespace);
  }

  public static ModuleMap emptyForTesting() {
    return new ModuleMap(ImmutableMap.of(), ImmutableMap.of());
  }
}