/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.core.spi;
  
  import ch.qos.logback.core.Context;
  import ch.qos.logback.core.status.ErrorStatus;
  import ch.qos.logback.core.status.InfoStatus;
  import ch.qos.logback.core.status.Status;
  import ch.qos.logback.core.status.StatusManager;
  import ch.qos.logback.core.status.WarnStatus;
  
  /**
   * A helper class that implements ContextAware methods. A class can implement
   * the ContextAware interface by deriving from this class.
   * 
   * @author Ceki Gülcü
   */
  public class ContextAwareBase implements ContextAware {
      private int noContextWarning = 0;
      protected Context context;
      final Object declaredOrigin;
  
      public ContextAwareBase() {
          declaredOrigin = this;
      }
  
      public ContextAwareBase(ContextAware declaredOrigin) {
          this.declaredOrigin = declaredOrigin;
      }
  
      public void setContext(Context context) {
          if (this.context == null) {
              this.context = context;
          } else if (this.context != context) {
              throw new IllegalStateException("Context has been already set");
          }
      }
  
      public Context getContext() {
          return this.context;
      }
  
      public StatusManager getStatusManager() {
          if (context == null) {
              return null;
          }
          return context.getStatusManager();
      }
  
      /**
       * The declared origin of status messages. By default 'this'. Derived classes
       * may override this method to declare other origin.
       * 
       * @return the declared origin, by default 'this'
       */
      protected Object getDeclaredOrigin() {
          return declaredOrigin;
      }
  
      public void addStatus(Status status) {
          if (context == null) {
              if (noContextWarning++ == 0) {
                  System.out.println("LOGBACK: No context given for " + this);
              }
              return;
          }
          StatusManager sm = context.getStatusManager();
          if (sm != null) {
              sm.add(status);
          }
      }
  
      public void addInfo(String msg) {
          addStatus(new InfoStatus(msg, getDeclaredOrigin()));
      }
  
      public void addInfo(String msg, Throwable ex) {
          addStatus(new InfoStatus(msg, getDeclaredOrigin(), ex));
      }
  
      public void addWarn(String msg) {
          addStatus(new WarnStatus(msg, getDeclaredOrigin()));
      }
  
      public void addWarn(String msg, Throwable ex) {
          addStatus(new WarnStatus(msg, getDeclaredOrigin(), ex));
      }
  
     public void addError(String msg) {
         addStatus(new ErrorStatus(msg, getDeclaredOrigin()));
     }
 
     public void addError(String msg, Throwable ex) {
         addStatus(new ErrorStatus(msg, getDeclaredOrigin(), ex));
     }
 }