org.springframework.integration.support.MutableMessageHeaders.java Source code

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Here is the source code for org.springframework.integration.support.MutableMessageHeaders.java

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/*
 * Copyright 2015-2019 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.support;

import java.nio.ByteBuffer;
import java.util.Map;
import java.util.UUID;

import org.springframework.lang.Nullable;
import org.springframework.messaging.MessageHeaders;

/**
 * A MessageHeaders that permits direct access to and modification of the
 * header map.
 *
 * @author Stuart Williams
 * @author David Turanski
 * @author Artem Bilan
 * @author Nathan Kurtyka
 *
 * @since 4.2
 */
public class MutableMessageHeaders extends MessageHeaders {

    private static final long serialVersionUID = 3084692953798643018L;

    public MutableMessageHeaders(@Nullable Map<String, Object> headers) {
        super(headers, extractId(headers), extractTimestamp(headers));
    }

    protected MutableMessageHeaders(@Nullable Map<String, Object> headers, @Nullable UUID id,
            @Nullable Long timestamp) {

        super(headers, id, timestamp);
    }

    @Override
    protected Map<String, Object> getRawHeaders() { // NOSONAR - not useless; increases visibility
        return super.getRawHeaders();
    }

    @Override
    public void putAll(Map<? extends String, ? extends Object> map) {
        super.getRawHeaders().putAll(map);
    }

    @Override
    public Object put(String key, Object value) {
        return super.getRawHeaders().put(key, value);
    }

    @Override
    public void clear() {
        super.getRawHeaders().clear();
    }

    @Override
    public Object remove(Object key) {
        return super.getRawHeaders().remove(key);
    }

    @Nullable
    private static UUID extractId(@Nullable Map<String, Object> headers) {
        if (headers != null && headers.containsKey(MessageHeaders.ID)) {
            Object id = headers.get(MessageHeaders.ID);
            if (id instanceof String) {
                return UUID.fromString((String) id);
            } else if (id instanceof byte[]) {
                ByteBuffer bb = ByteBuffer.wrap((byte[]) id);
                return new UUID(bb.getLong(), bb.getLong());
            } else {
                return (UUID) id;
            }
        }

        return null;
    }

    @Nullable
    private static Long extractTimestamp(@Nullable Map<String, Object> headers) {
        if (headers != null && headers.containsKey(MessageHeaders.TIMESTAMP)) {
            Object timestamp = headers.get(MessageHeaders.TIMESTAMP);
            return (timestamp instanceof String) ? Long.parseLong((String) timestamp) : (Long) timestamp;
        }

        return null;
    }

}