Android Open Source - NavigationDrawer Log Node

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The source code is released under:

Apache License

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Java Source Code

/*
 * Copyright (C) 2012 The Android Open Source Project
 */*from   w ww.  j  av  a  2  s.com*/
 * 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.example.android.common.logger;

/**
 * Basic interface for a logging system that can output to one or more targets.
 * Note that in addition to classes that will output these logs in some format,
 * one can also implement this interface over a filter and insert that in the chain,
 * such that no targets further down see certain data, or see manipulated forms of the data.
 * You could, for instance, write a "ToHtmlLoggerNode" that just converted all the log data
 * it received to HTML and sent it along to the next node in the chain, without printing it
 * anywhere.
 */
public interface LogNode {

  /**
   * Instructs first LogNode in the list to print the log data provided.
   *
   * @param priority Log level of the data being logged.  Verbose, Error, etc.
   * @param tag      Tag for for the log data.  Can be used to organize log statements.
   * @param msg      The actual message to be logged. The actual message to be logged.
   * @param tr       If an exception was thrown, this can be sent along for the logging facilities
   *                 to extract and print useful information.
   */
  public void println(int priority, String tag, String msg, Throwable tr);

}

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