PicoContainer example source code file (ImmutablePicoContainer.java)

This example PicoContainer source code file (ImmutablePicoContainer.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

collection, componentadapter, immutablepicocontainer, immutablepicocontainer, io, list, list, nullpointerexception, object, parametername, picocontainer, picocontainer, serializable, t, t, util

The PicoContainer ImmutablePicoContainer.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.containers;

import org.picocontainer.PicoContainer;
import org.picocontainer.ComponentAdapter;
import org.picocontainer.PicoVisitor;
import org.picocontainer.ParameterName;

import java.util.List;
import java.util.Collection;
import java.io.Serializable;

/**
 * Empty pico container serving as recoil damper in situations where you
 * do not like to check whether container reference suplpied to you
 * is null or not
 *
 * Typically its used to merk a parent container.
 *
 * @author Konstantin Pribluda
 */
public class ImmutablePicoContainer implements PicoContainer, Serializable {

    private final PicoContainer delegate;

    public ImmutablePicoContainer(PicoContainer delegate) {
        if (delegate == null) {
            throw new NullPointerException();
        }
        this.delegate = delegate;
    }

    public Object getComponent(Object componentKeyOrType) {
        return delegate.getComponent(componentKeyOrType);
    }

    public <T> T getComponent(Class componentType) {
        return delegate.getComponent(componentType);
    }

    public List getComponents() {
        return delegate.getComponents();
    }

    public PicoContainer getParent() {
        return delegate.getParent();
    }

    public ComponentAdapter<?> getComponentAdapter(Object componentKey) {
        return delegate.getComponentAdapter(componentKey);
    }

    public <T> ComponentAdapter getComponentAdapter(Class componentType, ParameterName componentParameterName) {
        return delegate.getComponentAdapter(componentType, componentParameterName);  
    }

    public Collection<ComponentAdapter getComponentAdapters() {
        return delegate.getComponentAdapters();
    }

    public <T> List> getComponentAdapters(Class componentType) {
        return delegate.getComponentAdapters(componentType);
    }

    public <T> List getComponents(Class componentType) {
        return delegate.getComponents(componentType);
    }

    public void accept(PicoVisitor visitor) {
        delegate.accept(visitor);
    }

    public boolean equals(Object obj) {
        return obj == this
               || (obj != null && obj == delegate)
               || (obj instanceof ImmutablePicoContainer && ((ImmutablePicoContainer) obj).delegate == delegate)
            ;
    }


    public int hashCode() {
        return delegate.hashCode();
    }
}