HttpMessage.java

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2012, Red Hat Middleware LLC, and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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.jboss.arquillian.warp.client.filter.http;

import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * An HTTP message which provides common properties for {@link HttpRequest} and
 * {@link HttpResponse}.
 *
 * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
 * @author Andy Taylor (andy.taylor@jboss.org)
 * @author <a href="http://gleamynode.net/">Trustin Lee</a>
 * @author Lukas Fryc
 */
public interface HttpMessage {

    /**
     * Returns the header value with the specified header name.  If there are
     * more than one header value for the specified header name, the first
     * value is returned.
     *
     * @return the header value or {@code null} if there is no such header
     */
    String getHeader(String name);

    /**
     * Returns the header values with the specified header name.
     *
     * @return the {@link List} of header values.  An empty list if there is no
     * such header.
     */
    List<String> getHeaders(String name);

    /**
     * Returns the all header names and values that this message contains.
     *
     * @return the {@link List} of the header name-value pairs.  An empty list
     * if there is no header in this message.
     */
    List<Map.Entry<String, String>> getHeaders();

    /**
     * Returns {@code true} if and only if there is a header with the specified
     * header name.
     */
    boolean containsHeader(String name);

    /**
     * Returns the {@link Set} of all header names that this message contains.
     */
    Set<String> getHeaderNames();
}