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 * Idea by Rachel Davies, Original code by Aslak Hellesoy and Paul Hammant *
009 *****************************************************************************/
010
011 package org.picocontainer.behaviors;
012
013 import org.picocontainer.ComponentAdapter;
014 import org.picocontainer.Parameter;
015 import org.picocontainer.PicoCompositionException;
016 import org.picocontainer.Characteristics;
017 import org.picocontainer.ComponentMonitor;
018 import org.picocontainer.behaviors.AbstractBehaviorFactory;
019 import org.picocontainer.LifecycleStrategy;
020 import org.picocontainer.ObjectReference;
021
022 import java.util.Properties;
023
024 /**
025 * factory class creating cached behaviours
026 * @author Aslak Hellesøy
027 * @author <a href="Rafal.Krzewski">rafal@caltha.pl</a>
028 * @author Konstantin Pribluda
029 */
030 public class Caching extends AbstractBehaviorFactory {
031
032 public <T> ComponentAdapter<T> createComponentAdapter(
033 ComponentMonitor componentMonitor,
034 LifecycleStrategy lifecycleStrategy,
035 Properties componentProperties, Object componentKey,
036 Class<T> componentImplementation, Parameter... parameters)
037 throws PicoCompositionException {
038 if (removePropertiesIfPresent(componentProperties,
039 Characteristics.NO_CACHE)) {
040 return super.createComponentAdapter(componentMonitor,
041 lifecycleStrategy, componentProperties, componentKey,
042 componentImplementation, parameters);
043 }
044 removePropertiesIfPresent(componentProperties, Characteristics.CACHE);
045 return new Cached<T>(super.createComponentAdapter(componentMonitor,
046 lifecycleStrategy, componentProperties, componentKey,
047 componentImplementation, parameters), newObjectReference());
048
049 }
050
051 public <T> ComponentAdapter<T> addComponentAdapter(
052 ComponentMonitor componentMonitor,
053 LifecycleStrategy lifecycleStrategy,
054 Properties componentProperties, ComponentAdapter<T> adapter) {
055 if (removePropertiesIfPresent(componentProperties,
056 Characteristics.NO_CACHE)) {
057 return super.addComponentAdapter(componentMonitor,
058 lifecycleStrategy, componentProperties, adapter);
059 }
060 removePropertiesIfPresent(componentProperties, Characteristics.CACHE);
061 return new Cached<T>(super.addComponentAdapter(componentMonitor,
062 lifecycleStrategy, componentProperties, adapter),
063 newObjectReference());
064 }
065
066 protected <T> ObjectReference<T> newObjectReference() {
067 return new Cached.SimpleReference<T>();
068 }
069 }