/*
 * Copyright 2009 Google Inc.
 *
 * 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.jstestdriver.idea.ui;

import org.apache.commons.logging.impl.SimpleLog;

/**
 * Overrides the write() method of SimpleLog to print to the delegated LogPrinter instead of
 * StdErr.
 * @author alexeagle@google.com (Alex Eagle)
 */
public class LogPanelLog extends SimpleLog {

  private static final long serialVersionUID = 7287879335785320256L;

  public LogPanelLog(String s) {
    super(s);
  }

  @Override
  protected void write(StringBuffer stringBuffer) {
    LogPanelHolder.logPanel.logLine(stringBuffer.toString());
  }

  /**
   * Static injection of the LogPrinter. This is needed because the logging framework creates
   * instances of this Log, without an opportunity to inject fields or access to the object
   * after it's created.
   */
  static class LogPanelHolder {
    protected static LogPrinter logPanel = new LogPrinter() {
      public void logLine(String logRecord) {
        System.err.println("Log printed with no panel to display in: " + logRecord);
      }
    };

    public static void setLogPanel(LogPrinter logPanel) {
      LogPanelHolder.logPanel = logPanel;
    }
  }
}