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PicoContainer example source code file (PicoBuilder.java)

This example PicoContainer source code file (PicoBuilder.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - PicoContainer tags/keywords

behaviorfactory, class, componentfactory, componentfactory, componentmonitor, emptypicocontainer, emptypicocontainer, mutablepicocontainer, mutablepicocontainer, nullpointerexception, object, picobuilder, picobuilder, stack, util

The PicoContainer PicoBuilder.java source code

/*****************************************************************************
 * Copyright (C) PicoContainer Organization. All rights reserved.            *
 * ------------------------------------------------------------------------- *
 * The software in this package is published under the terms of the BSD      *
 * style license a copy of which has been included with this distribution in *
 * the LICENSE.txt file.                                                     *
 *                                                                           *
 * Original code by                                                          *
 *****************************************************************************/
package org.picocontainer;

import static org.picocontainer.behaviors.Behaviors.caching;
import static org.picocontainer.behaviors.Behaviors.implHiding;
import org.picocontainer.behaviors.PropertyApplyingBehaviorFactory;
import org.picocontainer.behaviors.SynchronizedBehaviorFactory;
import org.picocontainer.containers.EmptyPicoContainer;
import org.picocontainer.containers.TransientPicoContainer;
import static org.picocontainer.injectors.Injectors.CDI;
import static org.picocontainer.injectors.Injectors.methodAnnotationDI;
import static org.picocontainer.injectors.Injectors.SDI;
import static org.picocontainer.injectors.Injectors.adaptiveDI;
import org.picocontainer.lifecycle.NullLifecycleStrategy;
import org.picocontainer.lifecycle.ReflectionLifecycleStrategy;
import org.picocontainer.lifecycle.StartableLifecycleStrategy;
import org.picocontainer.monitors.ConsoleComponentMonitor;
import org.picocontainer.monitors.NullComponentMonitor;

import java.util.ArrayList;
import java.util.Stack;
import java.util.List;

public class PicoBuilder {

    private PicoContainer parentContainer;
    private Class<? extends MutablePicoContainer> mpcClass = DefaultPicoContainer.class;
    private ComponentMonitor componentMonitor;
    private List<Object> containerComps = new ArrayList();

    public PicoBuilder(PicoContainer parentContainer, InjectionFactory injectionType) {
        this.injectionType = injectionType;
        if (parentContainer != null) {
            this.parentContainer = parentContainer;
        } else {
            this.parentContainer = new EmptyPicoContainer();
        }
    }

    public PicoBuilder(PicoContainer parentContainer) {
        this(parentContainer, adaptiveDI());
    }

    public PicoBuilder(InjectionFactory injectionType) {
        this(new EmptyPicoContainer(), injectionType);
    }

    public PicoBuilder() {
        this(new EmptyPicoContainer(), adaptiveDI());
    }

    private final Stack<Object> componentFactories = new Stack();

    private InjectionFactory injectionType;

    private Class<? extends ComponentMonitor> componentMonitorClass = NullComponentMonitor.class;
    private Class<? extends LifecycleStrategy> lifecycleStrategyClass = NullLifecycleStrategy.class;

    public PicoBuilder withLifecycle() {
        lifecycleStrategyClass = StartableLifecycleStrategy.class;
        return this;
    }

    public PicoBuilder withReflectionLifecycle() {
        lifecycleStrategyClass = ReflectionLifecycleStrategy.class;
        return this;
    }

    public PicoBuilder withConsoleMonitor() {
        componentMonitorClass =  ConsoleComponentMonitor.class;
        return this;
    }

    public PicoBuilder withMonitor(Class<? extends ComponentMonitor> cmClass) {
        if (cmClass == null) {
            throw new NullPointerException("monitor class cannot be null");
        }
        if (!ComponentMonitor.class.isAssignableFrom(cmClass)) {
            throw new ClassCastException(cmClass.getName() + " is not a " + ComponentMonitor.class.getName());

        }
        componentMonitorClass = cmClass;
        componentMonitor = null;
        return this;
    }

    public MutablePicoContainer build() {

        DefaultPicoContainer temp = new TransientPicoContainer();
        temp.addComponent(PicoContainer.class, parentContainer);

        for (Object containerComp : containerComps) {
            temp.addComponent(containerComp);
        }

        ComponentFactory lastCaf = injectionType;
        while (!componentFactories.empty()) {
            Object componentFactory = componentFactories.pop();
            DefaultPicoContainer temp2 = new TransientPicoContainer(temp);
            temp2.addComponent("componentFactory", componentFactory);
            if (lastCaf != null) {
                temp2.addComponent(ComponentFactory.class, lastCaf);
            }
            ComponentFactory penultimateCaf = lastCaf;
            lastCaf = (ComponentFactory) temp2.getComponent("componentFactory");
            if (lastCaf instanceof BehaviorFactory) {
                ((BehaviorFactory) lastCaf).forThis(penultimateCaf);
            }
        }

        temp.addComponent(ComponentFactory.class, lastCaf);
        if (componentMonitorClass == null) {
            temp.addComponent(ComponentMonitor.class, componentMonitor);
        } else {
            temp.addComponent(ComponentMonitor.class, componentMonitorClass);
        }
        temp.addComponent(LifecycleStrategy.class, lifecycleStrategyClass);
        temp.addComponent("mpc", mpcClass);


        return (MutablePicoContainer) temp.getComponent("mpc");
    }

    public PicoBuilder withHiddenImplementations() {
        componentFactories.push(implHiding());
        return this;
    }

    public PicoBuilder withSetterInjection() {
        injectionType = SDI();
        return this;
    }

    public PicoBuilder withAnnotationInjection() {
        injectionType = methodAnnotationDI();
        return this;
    }

    public PicoBuilder withConstructorInjection() {
        injectionType = CDI();
        return this;
    }

    public PicoBuilder withCaching() {
        componentFactories.push(caching());
        return this;
    }

    public PicoBuilder withComponentFactory(ComponentFactory componentFactory) {
        if (componentFactory == null) {
            throw new NullPointerException("CAF cannot be null");
        }
        componentFactories.push(componentFactory);
        return this;
    }

    public PicoBuilder withThreadSafety() {
        componentFactories.push(SynchronizedBehaviorFactory.class);
        return this;
    }


    public PicoBuilder withBehaviors(BehaviorFactory... factories) {
        for (ComponentFactory componentFactory : factories) {
            componentFactories.push(componentFactory);
        }
        return this;
    }

    public PicoBuilder implementedBy(Class<? extends MutablePicoContainer> containerClass) {
        mpcClass = containerClass;
        return this;
    }

    public PicoBuilder withMonitor(ComponentMonitor componentMonitor) {
        this.componentMonitor = componentMonitor;
        componentMonitorClass = null;
        return this;
    }

    public PicoBuilder withComponentFactory(Class<? extends ComponentFactory> componentFactoryClass) {
        componentFactories.push(componentFactoryClass);
        return this;
    }

    public PicoBuilder withCustomContainerComponent(Object containerDependency) {
        containerComps.add(containerDependency);
        return this;
    }

    public PicoBuilder withPropertyApplier() {
        componentFactories.push(PropertyApplyingBehaviorFactory.class);
        return this;
    }
}




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