/*
* Copyright 2002-2014 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.integration.selector;
import java.util.ArrayList;
import java.util.List;
import org.springframework.integration.core.MessageSelector;
import org.springframework.messaging.Message;
import org.springframework.util.Assert;
/**
* A {@link MessageSelector} implementation that checks the type of the
* {@link Message} payload. The payload type must be assignable to at least one
* of the selector's accepted types.
*
* @author Mark Fisher
*/
public class PayloadTypeSelector implements MessageSelector {
private final List<Class<?>> acceptedTypes = new ArrayList<Class<?>>();
/**
* Create a selector for the provided types. At least one is required.
*
* @param types The types.
*/
public PayloadTypeSelector(Class<?>... types) {
Assert.notEmpty(types, "at least one type is required");
for (Class<?> type : types) {
this.acceptedTypes.add(type);
}
}
@Override
public boolean accept(Message<?> message) {
Assert.notNull(message, "'message' must not be null");
Object payload = message.getPayload();
Assert.notNull(payload, "'payload' must not be null");
for (Class<?> type : this.acceptedTypes) {
if (type.isAssignableFrom(payload.getClass())) {
return true;
}
}
return false;
}
}