/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2011, 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(Object 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));
   }
 }