| // Copyright 2006, 2007, 2008 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 componentPageElementResources; |
| |
| /** |
| * @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 componentPageElementResources 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 componentPageElementResources, Logger logger) |
| { |
| super(handler, logger); |
| |
| this.eventType = eventType; |
| this.originatingComponentId = originatingComponentId; |
| this.componentPageElementResources = componentPageElementResources; |
| 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) |
| { |
| 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 = componentPageElementResources.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; |
| } |
| } |