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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 2011 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.debugging.sourcemap;

import com.google.debugging.sourcemap.proto.Mapping.OriginalMapping;

import java.util.Collection;

/**
 * A SourceMappingReversable is a SourceMapping that can provide the reverse
 * (source → target) source mapping.
 */
public interface SourceMappingReversable extends SourceMapping {

  /**
   * @return the collection of original sources in this source mapping
   */
  public Collection getOriginalSources();

  /**
   * Given a source file, line, and column, return the reverse mapping (source → target).
   * A collection is returned as in some cases (like a function being inlined), one source line
   * may map to more then one target location. An empty collection is returned if there were
   * no matches.
   * @param originalFile the source file
   * @param line the source line
   * @param column the source column
   * @return the reverse mapping (source → target)
   */
  public Collection getReverseMapping(String originalFile, int line, int column);

}