001    /*****************************************************************************
002     * Copyright (C) PicoContainer Organization. All rights reserved.            *
003     * ------------------------------------------------------------------------- *
004     * The software in this package is published under the terms of the BSD      *
005     * style license a copy of which has been included with this distribution in *
006     * the LICENSE.txt file.                                                     *
007     *                                                                           *
008     * Original code by Paul Hammant & Obie Fernandez & Aslak Hellesøy    *
009     *****************************************************************************/
010    
011    package org.picocontainer.monitors;
012    
013    import java.io.Serializable;
014    import java.lang.reflect.Constructor;
015    import java.lang.reflect.Member;
016    import java.lang.reflect.Method;
017    
018    import org.picocontainer.ComponentAdapter;
019    import org.picocontainer.ComponentMonitor;
020    import org.picocontainer.MutablePicoContainer;
021    import org.picocontainer.PicoContainer;
022    import org.picocontainer.PicoLifecycleException;
023    import org.picocontainer.injectors.AbstractInjector;
024    
025    /**
026     * A {@link ComponentMonitor} which does nothing. 
027     * 
028     * @author Paul Hammant
029     * @author Obie Fernandez
030     */
031    @SuppressWarnings("serial")
032    public class NullComponentMonitor implements ComponentMonitor, Serializable {
033    
034        public <T> Constructor<T> instantiating(PicoContainer container, ComponentAdapter<T> componentAdapter,
035                                         Constructor<T> constructor) {
036            return constructor;
037        }
038    
039        public <T> void instantiationFailed(PicoContainer container,
040                                        ComponentAdapter<T> componentAdapter,
041                                        Constructor<T> constructor,
042                                        Exception e) {
043        }
044    
045        public <T> void instantiated(PicoContainer container, ComponentAdapter<T>  componentAdapter,
046                                 Constructor<T>  constructor,
047                                 Object instantiated,
048                                 Object[] injected,
049                                 long duration) {
050        }
051    
052        public void invoking(PicoContainer container,
053                             ComponentAdapter<?> componentAdapter,
054                             Member member,
055                             Object instance) {
056        }
057    
058        public void invoked(PicoContainer container,
059                            ComponentAdapter<?> componentAdapter,
060                            Method method,
061                            Object instance,
062                            long duration) {
063        }
064    
065        public void invocationFailed(Member member, Object instance, Exception e) {
066        }
067    
068        public void lifecycleInvocationFailed(MutablePicoContainer container,
069                                              ComponentAdapter<?> componentAdapter, Method method,
070                                              Object instance,
071                                              RuntimeException cause) {
072            if (cause instanceof PicoLifecycleException) {
073                throw cause;
074            }
075            throw new PicoLifecycleException(method, instance, cause);
076        }
077    
078        public Object noComponentFound(MutablePicoContainer container, Object componentKey) {
079            return null;
080        }
081    
082        public AbstractInjector newInjectionFactory(AbstractInjector abstractInjector) {
083            return abstractInjector;  
084        }
085    
086    }