Package org.jspresso.framework.model.component.basic

Source Code of org.jspresso.framework.model.component.basic.BasicComponentInvocationHandler

/*
* Copyright (c) 2005-2011 Vincent Vandenschrick. All rights reserved.
*
*  This file is part of the Jspresso framework.
*
*  Jspresso is free software: you can redistribute it and/or modify
*  it under the terms of the GNU Lesser General Public License as published by
*  the Free Software Foundation, either version 3 of the License, or
*  (at your option) any later version.
*
*  Jspresso is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU Lesser General Public License for more details.
*
*  You should have received a copy of the GNU Lesser General Public License
*  along with Jspresso.  If not, see <http://www.gnu.org/licenses/>.
*/
package org.jspresso.framework.model.component.basic;

import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;
import org.jspresso.framework.model.component.IComponent;
import org.jspresso.framework.model.component.IComponentCollectionFactory;
import org.jspresso.framework.model.component.IComponentExtensionFactory;
import org.jspresso.framework.model.component.IComponentFactory;
import org.jspresso.framework.model.descriptor.IComponentDescriptor;
import org.jspresso.framework.util.accessor.IAccessorFactory;

/**
* This is the core implementation of all inlined components in the application.
* Instances of this class serve as handlers for proxies representing the
* inlined components.
*
* @version $LastChangedRevision: 3701 $
* @author Vincent Vandenschrick
*/
public class BasicComponentInvocationHandler extends
    AbstractComponentInvocationHandler {

  private static final long   serialVersionUID = -3178070064423598514L;

  private Map<String, Object> properties;

  /**
   * Constructs a new <code>BasiccomponentInvocationHandler</code> instance.
   *
   * @param componentDescriptor
   *          The descriptor of the proxy component.
   * @param inlineComponentFactory
   *          the factory used to create inline components.
   * @param collectionFactory
   *          The factory used to create empty component collections from
   *          collection getters.
   * @param accessorFactory
   *          The factory used to access proxy properties.
   * @param extensionFactory
   *          The factory used to create component extensions based on their
   *          classes.
   */
  protected BasicComponentInvocationHandler(
      IComponentDescriptor<IComponent> componentDescriptor,
      IComponentFactory inlineComponentFactory,
      IComponentCollectionFactory<IComponent> collectionFactory,
      IAccessorFactory accessorFactory,
      IComponentExtensionFactory extensionFactory) {
    super(componentDescriptor, inlineComponentFactory, collectionFactory,
        accessorFactory, extensionFactory);
    this.properties = createPropertyMap();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected boolean computeEquals(IComponent proxy, Object another) {
    if (!(another instanceof IComponent)) {
      return false;
    }
    if (proxy == another) {
      return true;
    }
    return new EqualsBuilder().append(proxy.getComponentContract(),
        ((IComponent) another).getComponentContract()).append(
        proxy.straightGetProperties(),
        ((IComponent) another).straightGetProperties()).isEquals();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected int computeHashCode(IComponent proxy) {
    return new HashCodeBuilder(7, 13).append(proxy.getComponentContract())
        .append(proxy.straightGetProperties()).toHashCode();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected IComponent decorateReferent(
      IComponent referent,
      @SuppressWarnings("unused") IComponentDescriptor<? extends IComponent> referentDescriptor) {
    return referent;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected Object retrievePropertyValue(String propertyName) {
    return properties.get(propertyName);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void storeProperty(String propertyName, Object propertyValue) {
    properties.put(propertyName, propertyValue);
  }

  private Map<String, Object> createPropertyMap() {
    return new HashMap<String, Object>();
  }
}
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