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/*
 * Copyright 2002-2015 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 org.springframework.context;

import org.springframework.core.ResolvableType;
import org.springframework.core.ResolvableTypeProvider;
import org.springframework.util.Assert;

/**
 * An {@link ApplicationEvent} that carries an arbitrary payload.
 *
 * 

Mainly intended for internal use within the framework. * * @author Stephane Nicoll * @since 4.2 * @param the payload type of the event */ @SuppressWarnings("serial") public class PayloadApplicationEvent extends ApplicationEvent implements ResolvableTypeProvider { private final T payload; /** * Create a new PayloadApplicationEvent. * @param source the object on which the event initially occurred (never {@code null}) * @param payload the payload object (never {@code null}) */ public PayloadApplicationEvent(Object source, T payload) { super(source); Assert.notNull(payload, "Payload must not be null"); this.payload = payload; } @Override public ResolvableType getResolvableType() { return ResolvableType.forClassWithGenerics(getClass(), ResolvableType.forInstance(getPayload())); } /** * Return the payload of the event. */ public T getPayload() { return this.payload; } }





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