package cz.cuni.amis.pogamut.base.utils.logging;
   
   import java.util.logging.Handler;
   import java.util.logging.LogRecord;
   
   /**
    * Handler for the messages - instantiated without publisher.
    * <p><p>
    * Use setPublisher() or constructor with ILogPublisher parameter.
   * <p><p>
   * See LogPublisher and it's public static inner classes ConsolePublisher and FilePublisher.
   *  
   * @author Jimmy
   *
   */
  public class LogHandler extends Handler implements Cloneable {
  	
  	public static class ConsoleLogHandler extends LogHandler {
  		
  		public ConsoleLogHandler() {
  			super(new LogPublisher.ConsolePublisher());
  		}
  		
  	}
  	
  	protected ILogPublisher publisher = null;
  	
  	/**
  	 * Creates empty log handler without any publisher.
  	 */
  	public LogHandler() {			
  	}
  	
  	@Override
  	public int hashCode() {
  		return 12345678;
  	}
  	
  	public boolean equals(Object obj) {
  		if (obj == null) return false;
  		if (!(obj instanceof LogHandler)) return false;
  		return publisher.equals(((LogHandler)obj).publisher);
  	}
  	
  	/**
  	 * Creates log handler with specific publisher.
  	 * @param publisher
  	 */
  	public LogHandler(ILogPublisher publisher) {
  		this.publisher = publisher;
  	}
  	
  	/**
  	 * Returns actual publisher of the hanlder.
  	 * @return
  	 */
  	public synchronized ILogPublisher getPublisher() {
  		return publisher;
  	}
  
  	/**
  	 * Sets new publisher to the handler.
  	 * @param publisher
  	 */
  	public synchronized void setPublisher(ILogPublisher publisher) {
  		this.publisher = publisher;
  	}
  	
  	@Override
  	public synchronized void close() throws SecurityException {
  		ILogPublisher actualPublisher = publisher;		
  		if (actualPublisher != null) actualPublisher.close();		
  	}
  
  	@Override
  	public synchronized void flush() {
  		ILogPublisher actualPublisher = publisher;		
  		if (actualPublisher != null) actualPublisher.flush();		
  	}
  
  	@Override
  	public synchronized void publish(LogRecord record) {
  		ILogPublisher actualPublisher = publisher;		
  		if (actualPublisher != null) actualPublisher.publish(record);
  	}
  
  }