/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation", "Tapestry"
* must not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* or "Tapestry", nor may "Apache" or "Tapestry" appear in their
* name, without prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE TAPESTRY CONTRIBUTOR COMMUNITY
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.tapestry.callback;
import org.apache.tapestry.ApplicationRuntimeException;
import org.apache.tapestry.IComponent;
import org.apache.tapestry.IDirect;
import org.apache.tapestry.IPage;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.Tapestry;
/**
* Simple callback for re-invoking a {@link IDirect} component trigger..
*
* @version $Id: DirectCallback.java,v 1.3 2003/05/28 13:41:44 hlship Exp $
* @author Howard Lewis Ship
* @since 0.2.9
*
**/
public class DirectCallback implements ICallback
{
/**
* @since 2.0.4
*
**/
private static final long serialVersionUID = -8888847655917503471L;
private String _pageName;
private String _componentIdPath;
private Object[] _parameters;
public String toString()
{
StringBuffer buffer = new StringBuffer("DirectCallback[");
buffer.append(_pageName);
buffer.append('/');
buffer.append(_componentIdPath);
if (_parameters != null)
{
String sep = " ";
for (int i = 0; i < _parameters.length; i++)
{
buffer.append(sep);
buffer.append(_parameters[i]);
sep = ", ";
}
}
buffer.append(']');
return buffer.toString();
}
/**
* Creates a new DirectCallback for the component. The parameters
* (which may be null) is retained, not copied.
*
**/
public DirectCallback(IDirect component, Object[] parameters)
{
_pageName = component.getPage().getPageName();
_componentIdPath = component.getIdPath();
_parameters = parameters;
}
/**
* Locates the {@link IDirect} component that was previously identified
* (and whose page and id path were stored).
* Invokes {@link IRequestCycle#setServiceParameters(Object[])} to
* restore the service parameters, then
* invokes {@link IDirect#trigger(IRequestCycle)} on the component.
*
**/
public void performCallback(IRequestCycle cycle)
{
IPage page = cycle.getPage(_pageName);
IComponent component = page.getNestedComponent(_componentIdPath);
IDirect direct = null;
try
{
direct = (IDirect) component;
}
catch (ClassCastException ex)
{
throw new ApplicationRuntimeException(
Tapestry.format("DirectCallback.wrong-type", component.getExtendedId()),
component,
null,
ex);
}
cycle.setServiceParameters(_parameters);
direct.trigger(cycle);
}
}