    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.references.SimpleReference;
    020    import org.picocontainer.LifecycleStrategy;
    021
    022    import java.util.Properties;
    023
    024    /**
    025     * factory class creating cached behaviours
    026     * @author Aslak Helles&oslash;y
    027     * @author <a href="Rafal.Krzewski">rafal@caltha.pl</a>
    028     * @author Konstantin Pribluda
    029     */
    030    @SuppressWarnings("serial")
    031    public class Caching extends AbstractBehaviorFactory {
    032
    033        public <T> ComponentAdapter<T> createComponentAdapter(
    034                            ComponentMonitor componentMonitor,
    035                            LifecycleStrategy lifecycleStrategy,
    036                            Properties componentProperties, Object componentKey,
    037                            Class<T> componentImplementation, Parameter... parameters)
    038                            throws PicoCompositionException {
    039                    if (removePropertiesIfPresent(componentProperties,
    040                                    Characteristics.NO_CACHE)) {
    041                            return super.createComponentAdapter(componentMonitor,
    042                                            lifecycleStrategy, componentProperties, componentKey,
    043                                            componentImplementation, parameters);
    044                    }
    045                    removePropertiesIfPresent(componentProperties, Characteristics.CACHE);
    046            return componentMonitor.newBehavior(new Cached<T>(super.createComponentAdapter(componentMonitor,
    047                                    lifecycleStrategy, componentProperties, componentKey,
    048                                    componentImplementation, parameters),
    049                    new SimpleReference<Stored.Instance<T>>()));
    050
    051            }
    052
    053            public <T> ComponentAdapter<T> addComponentAdapter(
    054                            ComponentMonitor componentMonitor,
    055                            LifecycleStrategy lifecycleStrategy,
    056                            Properties componentProperties, ComponentAdapter<T> adapter) {
    057                    if (removePropertiesIfPresent(componentProperties,
    058                                    Characteristics.NO_CACHE)) {
    059                            return super.addComponentAdapter(componentMonitor,
    060                                            lifecycleStrategy, componentProperties, adapter);
    061                    }
    062                    removePropertiesIfPresent(componentProperties, Characteristics.CACHE);
    063            ComponentAdapter<T> delegate = super.addComponentAdapter(componentMonitor, lifecycleStrategy, componentProperties, adapter);
    064            return componentMonitor.newBehavior(componentMonitor.newBehavior(new Cached<T>(delegate, new SimpleReference<Stored.Instance<T>>())));
    065            }
    066
    067    }