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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 2008 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;

import static com.google.common.base.Preconditions.checkArgument;

import com.google.common.collect.ImmutableList;

/**
 * Control whether warnings should be restricted or suppressed for specified
 * paths.
 */
public final class ShowByPathWarningsGuard extends WarningsGuard {
  private static final long serialVersionUID = 1L;

  /**
   * Controls whether warnings should be restricted to a specified path or
   * suppressed within the specified path.
   */
  public enum ShowType {
    INCLUDE,  // Suppress warnings outside the path.
    EXCLUDE   // Suppress warnings within the path.
  }

  private final ByPathWarningsGuard warningsGuard;

  public ShowByPathWarningsGuard(String checkWarningsOnlyForPath) {
    this(checkWarningsOnlyForPath, ShowType.INCLUDE);
  }

  public ShowByPathWarningsGuard(String[] checkWarningsOnlyForPath) {
    this(checkWarningsOnlyForPath, ShowType.INCLUDE);
  }

  public ShowByPathWarningsGuard(String path, ShowType showType) {
    this(new String[] { path }, showType);
  }

  public ShowByPathWarningsGuard(String[] paths, ShowType showType) {
    checkArgument(paths != null);
    checkArgument(showType != null);
    ImmutableList pathList = ImmutableList.copyOf(paths);
    if (showType == ShowType.INCLUDE) {
      warningsGuard = ByPathWarningsGuard.exceptPath(pathList, CheckLevel.OFF);
    } else {
      warningsGuard = ByPathWarningsGuard.forPath(pathList, CheckLevel.OFF);
    }
  }

  @Override
  public CheckLevel level(JSError error) {
    return warningsGuard.level(error);
  }

  @Override
  protected int getPriority() {
    return warningsGuard.getPriority();
  }
}