001    /*
002     $Id: GroovyLog.java 2910 2005-10-03 18:07:37Z tug $
003    
004     Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
005    
006     Redistribution and use of this software and associated documentation
007     ("Software"), with or without modification, are permitted provided
008     that the following conditions are met:
009    
010     1. Redistributions of source code must retain copyright
011        statements and notices.  Redistributions must also contain a
012        copy of this document.
013    
014     2. Redistributions in binary form must reproduce the
015        above copyright notice, this list of conditions and the
016        following disclaimer in the documentation and/or other
017        materials provided with the distribution.
018    
019     3. The name "groovy" must not be used to endorse or promote
020        products derived from this Software without prior written
021        permission of The Codehaus.  For written permission,
022        please contact info@codehaus.org.
023    
024     4. Products derived from this Software may not be called "groovy"
025        nor may "groovy" appear in their names without prior written
026        permission of The Codehaus. "groovy" is a registered
027        trademark of The Codehaus.
028    
029     5. Due credit should be given to The Codehaus -
030        http://groovy.codehaus.org/
031    
032     THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
033     ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
034     NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
035     FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
036     THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
037     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
038     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
039     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
040     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
041     STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
042     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
043     OF THE POSSIBILITY OF SUCH DAMAGE.
044    
045     */
046    package groovy.util;
047    
048    import groovy.lang.GroovyObjectSupport;
049    
050    
051    
052    /**
053     * Represents an arbitrary logging service. By default this outputs to
054     * System.out though derivations of this class could log to Jakarta Commons Logging
055     * or log4j or JDK 1.5 logging etc
056     * 
057     * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
058     * @version $Revision: 2910 $
059     */
060    public class GroovyLog extends GroovyObjectSupport {
061    
062        String prefix;
063    
064        /** 
065         * Factory method to create new instances 
066         */
067        public static GroovyLog newInstance(Class aClass) {
068            return new GroovyLog(aClass);
069        }
070        
071        public GroovyLog() {
072            this("");
073        }
074    
075        public GroovyLog(Class owner) {
076            this(owner.getName());
077        }
078    
079        public GroovyLog(String prefix) {
080            this.prefix = (prefix != null && prefix.length() > 0) ? "[" + prefix + ":" : "[";
081        }
082    
083        public Object invokeMethod(String name, Object args) {
084            System.out.println(prefix + name + "] " + args);
085            return null;
086        }
087    }