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Central module for Tapestry, containing interfaces to the Java
Servlet API and all core services and components.
// Copyright 2006, 2007, 2008, 2010 The Apache Software Foundation
//
// 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 org.apache.tapestry5.internal.services;
import org.apache.tapestry5.ComponentEventCallback;
import org.apache.tapestry5.EventContext;
import org.apache.tapestry5.internal.structure.ComponentPageElementResources;
import org.apache.tapestry5.runtime.ComponentEvent;
import org.slf4j.Logger;
public class ComponentEventImpl extends EventImpl implements ComponentEvent
{
private final String eventType;
private final String originatingComponentId;
private final EventContext context;
private final ComponentPageElementResources elementResources;
/**
* @param eventType
* non blank string used to identify the type of event that was triggered
* @param originatingComponentId
* the id of the component that triggered the event
* @param context
* provides access to parameter values
* @param handler
* invoked when a non-null return value is obtained from an event handler method
* @param elementResources
* provides access to common resources and services
* @param logger
* used to log method invocations
*/
public ComponentEventImpl(String eventType, String originatingComponentId, EventContext context,
ComponentEventCallback handler, ComponentPageElementResources elementResources, Logger logger)
{
super(handler, logger);
this.eventType = eventType;
this.originatingComponentId = originatingComponentId;
this.elementResources = elementResources;
this.context = context;
}
@Override
public String toString()
{
return String.format("ComponentEvent[%s from %s]", eventType, originatingComponentId.length() == 0 ? "(self)"
: originatingComponentId);
}
public boolean matches(String eventType, String componentId, int parameterCount)
{
if (isAborted())
return false;
return this.eventType.equalsIgnoreCase(eventType) && context.getCount() >= parameterCount
&& (originatingComponentId.equalsIgnoreCase(componentId) || componentId.equals(""));
}
@SuppressWarnings("unchecked")
public Object coerceContext(int index, String desiredTypeName)
{
if (index >= context.getCount())
throw new IllegalArgumentException(ServicesMessages.contextIndexOutOfRange(getMethodDescription()));
try
{
Class desiredType = elementResources.toClass(desiredTypeName);
return context.get(desiredType, index);
}
catch (Exception ex)
{
throw new IllegalArgumentException(ServicesMessages.exceptionInMethodParameter(getMethodDescription(),
index, ex), ex);
}
}
public Object[] getContext()
{
int count = context.getCount();
Object[] result = new Object[count];
for (int i = 0; i < count; i++)
result[i] = context.get(Object.class, i);
return result;
}
public EventContext getEventContext()
{
return context;
}
}