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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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/*
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Rhino code, released
 * May 6, 1999.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1997-1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Nick Santos
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License Version 2 or later (the "GPL"), in which
 * case the provisions of the GPL are applicable instead of those above. If
 * you wish to allow use of your version of this file only under the terms of
 * the GPL and not to allow others to use your version of this file under the
 * MPL, indicate your decision by deleting the provisions above and replacing
 * them with the notice and other provisions required by the GPL. If you do
 * not delete the provisions above, a recipient may use your version of this
 * file under either the MPL or the GPL.
 *
 * ***** END LICENSE BLOCK ***** */

package com.google.javascript.rhino;

/**
 * A simple implementation of {@code StaticSourceFile} for testing.
 *
 * @author [email protected] (Nick Santos)
 */
public final class SimpleSourceFile implements StaticSourceFile {
  private final String name;
  private final SourceKind kind;

  public SimpleSourceFile(String name, SourceKind kind) {
    this.name = name;
    this.kind = kind;
  }

  @Override
  public String getName() {
    return name;
  }

  @Override
  public SourceKind getKind() {
    return kind;
  }

  @Override
  public int getColumnOfOffset(int offset) {
    return 0;
  }

  @Override
  public int getLineOfOffset(int offset) {
    return 1;
  }

  @Override
  public int getLineOffset(int line) {
    if (line < 1) {
      throw new IllegalStateException(
          "Should not call getLineOffset with line number " + line);
    }
    return Integer.MIN_VALUE;
  }

  @Override
  public String toString() {
    return name;
  }
}