Android Open Source - JsonPullParser Log

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License

The source code is released under:
Apache License
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Java Source Code

/*
 * Copyright 2011 vvakame <vvakame@gmail.com>
 *//  ww  w . j a  va2s . c  o m
 * 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 net.vvakame.util.jsonpullparser.factory;

import javax.annotation.processing.Messager;
import javax.lang.model.element.Element;
import javax.tools.Diagnostic;

/**
 * Logging facility modelled after Android's Log class.
 * @author vvakame
 */
public class Log {

  static Messager messager = null;

  static boolean debug = false;


  /**
   * Initialization.
   * @param msgr
   * @author vvakame
   */
  public static void init(Messager msgr) {
    messager = msgr;
  }

  /**
   * Enables or disables debugging mode.
   * @param d True to enable, false to disable
   * @author vvakame
   */
  public static void setDebug(boolean d) {
    debug = d;
  }

  /**
   * Logs debug message.<br>
   * No-op if the debugging mode ({@link #debug}) is disabled.
   * @author vvakame
   */
  public static void d() {
    if (!debug) {
      return;
    }
    d(getStackInfo());
  }

  /**
   * Logs debug message.<br>
   * No-op if the debugging mode ({@link #debug}) is disabled.
   * @param msg Message
   * @author vvakame
   */
  public static void d(String msg) {
    if (!debug) {
      return;
    }
    if (messager == null) {
      return;
    }
    messager.printMessage(Diagnostic.Kind.NOTE, msg);
  }

  /**
   * Logs warning message.
   * @param msg Message
   * @author vvakame
   */
  public static void w(String msg) {
    messager.printMessage(Diagnostic.Kind.WARNING, msg);
  }

  /**
   * Logs warning message about the given element.<br>
   * @param msg Message
   * @param element Offending element
   * @author vvakame
   */
  public static void w(String msg, Element element) {
    messager.printMessage(Diagnostic.Kind.WARNING, msg, element);
  }

  /**
   * Logs error message.
   * @param msg Message
   * @author vvakame
   */
  public static void e(String msg) {
    messager.printMessage(Diagnostic.Kind.ERROR, msg);
  }

  /**
   * Logs error message about the given element.
   * @param msg Message
   * @param element Offending element
   * @author vvakame
   */
  public static void e(String msg, Element element) {
    messager.printMessage(Diagnostic.Kind.ERROR, msg, element);
  }

  /**
   * Logs error message about the given exception.
   * @param e Offending throwable
   * @author vvakame
   */
  public static void e(Throwable e) {
    messager.printMessage(Diagnostic.Kind.ERROR, "exception thrown! " + e.getMessage());
  }

  static String getStackInfo() {
    StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
    for (StackTraceElement stack : stackTrace) {
      if (Thread.class.getCanonicalName().equals(stack.getClassName())) {
        continue;
      } else if (Log.class.getCanonicalName().equals(stack.getClassName())) {
        continue;
      } else {
        return stack.getClassName() + "#" + stack.getMethodName() + "@L"
            + stack.getLineNumber();
      }
    }
    return "unknown";
  }
}
Java Source Code List
