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Liferay Frontend JS Minifier

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/*
 * Copyright 2007 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 com.google.javascript.jscomp.parsing.parser.util.format.SimpleFormat;

import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * An error manager that logs errors and warnings using a logger in addition to
 * collecting them in memory. Errors are logged at the SEVERE level and warnings
 * are logged at the WARNING level.
 */
public final class LoggerErrorManager extends BasicErrorManager {
  private final MessageFormatter formatter;
  private final Logger logger;

  /**
   * Creates an instance.
   */
  public LoggerErrorManager(MessageFormatter formatter, Logger logger) {
    this.formatter = formatter;
    this.logger = logger;
  }

  /**
   * Creates an instance with a source-less error formatter.
   */
  public LoggerErrorManager(Logger logger) {
    this(LightweightMessageFormatter.withoutSource(), logger);
  }

  @Override
  public void println(CheckLevel level, JSError error) {
    switch (level) {
      case ERROR:
        logger.severe(error.format(level, formatter));
        break;
      case WARNING:
        logger.warning(error.format(level, formatter));
        break;
      case OFF:
        break;
    }
  }

  @Override
  protected void printSummary() {
    Level level = (getErrorCount() + getWarningCount() == 0) ?
        Level.INFO : Level.WARNING;
    if (getTypedPercent() > 0.0) {
      logger.log(level, SimpleFormat.format(
          "%d error(s), %d warning(s), %.1f%% typed",
          getErrorCount(), getWarningCount(), getTypedPercent()));
    } else if (getErrorCount() + getWarningCount() > 0) {
      logger.log(level, SimpleFormat.format(
          "%d error(s), %d warning(s)",
          getErrorCount(), getWarningCount()));
    }
  }
}