applicationfactoryimpl.java

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/*
 * Copyright 2002-2004 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package de.mindmatters.faces.application;

import javax.faces.application.Application;
import javax.faces.application.ApplicationFactory;

/**
 * <strong>ApplicationFactory</strong> is a factory object that creates (if
 * needed) and returns {@link Application} instances. This factory creates an
 * {@link ApplicationImpl} as default application.
 * 
 * @author Andreas Kuhrwahl
 * 
 */
public final class ApplicationFactoryImpl extends ApplicationFactory {

    /** The ApplicationFactory of the underlying JSF implementation. */
    private final ApplicationFactory delegate;

    /** The application. */
    private Application application;

    /**
     * Creates an ApplicationFactory with the given ApplicationFactory
     * <code>delegate</code>.
     * 
     * @param delegate
     *            The ApplicationFactory of the underlying JSF implementation
     */
    public ApplicationFactoryImpl(final ApplicationFactory delegate) {
        super();
        this.delegate = delegate;
    }

    /**
     * {@inheritDoc}
     */
    public Application getApplication() {
        if (this.application == null) {
            this.application = new ApplicationImpl(this.delegate
                    .getApplication());
        }
        return this.application;
    }

    /**
     * {@inheritDoc}
     */
    public void setApplication(final Application application) {
        if (application == null) {
            throw new NullPointerException("Application");
        }
        this.application = application;
    }

}