org.springframework.integration.ip.tcp.connection.MessageConvertingTcpMessageMapper.java Source code

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Here is the source code for org.springframework.integration.ip.tcp.connection.MessageConvertingTcpMessageMapper.java

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/*
 * Copyright 2002-2019 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.ip.tcp.connection;

import java.util.Map;

import org.springframework.integration.support.MutableMessageHeaders;
import org.springframework.lang.Nullable;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageHeaders;
import org.springframework.messaging.converter.MessageConverter;
import org.springframework.util.Assert;

/**
 * @author Gary Russell
 * @author Artem  Bilan
 *
 * @since 3.0
 *
 */
public class MessageConvertingTcpMessageMapper extends TcpMessageMapper {

    private final MessageConverter messageConverter;

    public MessageConvertingTcpMessageMapper(MessageConverter messageConverter) {
        Assert.notNull(messageConverter, "'messageConverter' must not be null");
        this.messageConverter = messageConverter;
    }

    @Override
    public Message<?> toMessage(TcpConnection connection, @Nullable Map<String, Object> headers) {
        Object data = connection.getPayload();
        if (data != null) {

            MessageHeaders messageHeaders = new MutableMessageHeaders(null, MessageHeaders.ID_VALUE_NONE, -1L) {

                private static final long serialVersionUID = 3084692953798643018L;

            };

            addStandardHeaders(connection, messageHeaders);
            addCustomHeaders(connection, messageHeaders);

            if (headers != null) {
                headers.forEach(messageHeaders::putIfAbsent);
            }

            return this.messageConverter.toMessage(data, messageHeaders);
        } else {
            if (logger.isWarnEnabled()) {
                logger.warn("Null payload from connection " + connection.getConnectionId());
            }
            return null;
        }
    }

    @Override
    public Object fromMessage(Message<?> message) {
        return this.messageConverter.fromMessage(message, Object.class);
    }

}