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/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */

package org.apache.http.message;

import java.io.Serializable;

import org.apache.http.ProtocolVersion;
import org.apache.http.StatusLine;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.annotation.Contract;
import org.apache.http.util.Args;

/**
 * Basic implementation of {@link StatusLine}
 *
 * @since 4.0
 */
@Contract(threading = ThreadingBehavior.IMMUTABLE)
public class BasicStatusLine implements StatusLine, Cloneable, Serializable {

    private static final long serialVersionUID = -2443303766890459269L;

    // ----------------------------------------------------- Instance Variables

    /** The protocol version. */
    private final ProtocolVersion protoVersion;

    /** The status code. */
    private final int statusCode;

    /** The reason phrase. */
    private final String reasonPhrase;

    // ----------------------------------------------------------- Constructors
    /**
     * Creates a new status line with the given version, status, and reason.
     *
     * @param version           the protocol version of the response
     * @param statusCode        the status code of the response
     * @param reasonPhrase      the reason phrase to the status code, or
     *                          {@code null}
     */
    public BasicStatusLine(final ProtocolVersion version, final int statusCode,
                           final String reasonPhrase) {
        super();
        this.protoVersion = Args.notNull(version, "Version");
        this.statusCode = Args.notNegative(statusCode, "Status code");
        this.reasonPhrase = reasonPhrase;
    }

    // --------------------------------------------------------- Public Methods

    @Override
    public int getStatusCode() {
        return this.statusCode;
    }

    @Override
    public ProtocolVersion getProtocolVersion() {
        return this.protoVersion;
    }

    @Override
    public String getReasonPhrase() {
        return this.reasonPhrase;
    }

    @Override
    public String toString() {
        // no need for non-default formatting in toString()
        return BasicLineFormatter.INSTANCE.formatStatusLine(null, this).toString();
    }

    @Override
    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }

}