/*
 * Copyright 2002-2021 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
 *
 *      https://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.handler;

import org.springframework.integration.util.AbstractExpressionEvaluator;
import org.springframework.lang.Nullable;
import org.springframework.messaging.Message;

/**
 * @param <T> the expected payload type.
 *
 * @author Mark Fisher
 * @author Dave Syer
 * @author Artem Bilan
 *
 * @since 2.0
 */
public abstract class AbstractMessageProcessor<T> extends AbstractExpressionEvaluator implements MessageProcessor<T> {

	@Nullable
	public abstract T processMessage(Message<?> message);

}
