java-design-patterns/poison-pill/src/main/java/com/iluwatar/poisonpill/SimpleMessage.java

package com.iluwatar.poisonpill;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

/**
 * {@link Message} basic implementation
 */
public class SimpleMessage implements Message {

	private Map<Headers, String> headers = new HashMap<>();
	private String body;

	@Override
	public void addHeader(Headers header, String value) {
		headers.put(header, value);
	}

	@Override
	public String getHeader(Headers header) {
		return headers.get(header);
	}

	@Override
	public Map<Headers, String> getHeaders() {
		return Collections.unmodifiableMap(headers);
	}

	@Override
	public void setBody(String body) {
		this.body = body;
	}

	@Override
	public String getBody() {
		return body;
	}
}