001    /*
002      Copyright (C) 2001 Renaud Pawlak
003    
004      This program is free software; you can redistribute it and/or modify
005      it under the terms of the GNU Lesser General Public License as
006      published by the Free Software Foundation; either version 2 of the
007      License, or (at your option) any later version.
008    
009      This program is distributed in the hope that it will be useful,
010      but WITHOUT ANY WARRANTY; without even the implied warranty of
011      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
012      GNU Lesser General Public License for more details.
013    
014      You should have received a copy of the GNU Lesser General Public License
015      along with this program; if not, write to the Free Software
016      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
017    
018    package org.objectweb.jac.aspects.tracing;
019    
020    /**
021     * The functional part of the counting aspect: a counter object.
022     *
023     * <p>This component is used by the SimpleCountingWrapper and the
024     * OptimizedCountingWrapper to count the invocations performed on the
025     * counted methods.
026     *
027     * @see SimpleCountingWrapper
028     * @see OptimizedCountingWrapper */
029    
030    public class Counter {
031    
032       /** Stores the counter value. */
033       int counter = 0;
034    
035       /**
036        * Increments the counter with a given value.
037        */
038    
039       public void incr ( int value ) {
040          counter+=value;
041       }
042    
043       /**
044        * Sets the counter value.
045        *
046        * @param value the new counter value
047        * @see #get()
048        * @see #incr(int) */
049    
050       public void set( int value ) {
051          counter = value;
052       }
053       
054       /** 
055        * Gets the counter value.
056        *
057        * @return the counter value
058        * @see #set(int)
059        * @see #incr(int) */
060    
061       public int get() {
062          return counter;
063       }
064    
065       /**
066        * Print the counter in <code>System.out</code>.
067        */
068       public void printCounter() {
069          System.out.println("<<< Counting aspect says : " + counter + 
070                             " line(s) printed. >>>");
071       }  
072    
073    }
074    
075    
076