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    1   /*
    2    * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//httpclient/src/java/org/apache/commons/httpclient/methods/RequestEntity.java,v 1.4 2004/05/17 21:46:03 olegk Exp $
    3    * $Revision: 480424 $
    4    * $Date: 2006-11-29 06:56:49 +0100 (Wed, 29 Nov 2006) $
    5    *
    6    * ====================================================================
    7    *
    8    *  Licensed to the Apache Software Foundation (ASF) under one or more
    9    *  contributor license agreements.  See the NOTICE file distributed with
    10   *  this work for additional information regarding copyright ownership.
    11   *  The ASF licenses this file to You under the Apache License, Version 2.0
    12   *  (the "License"); you may not use this file except in compliance with
    13   *  the License.  You may obtain a copy of the License at
    14   *
    15   *      http://www.apache.org/licenses/LICENSE-2.0
    16   *
    17   *  Unless required by applicable law or agreed to in writing, software
    18   *  distributed under the License is distributed on an "AS IS" BASIS,
    19   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    20   *  See the License for the specific language governing permissions and
    21   *  limitations under the License.
    22   * ====================================================================
    23   *
    24   * This software consists of voluntary contributions made by many
    25   * individuals on behalf of the Apache Software Foundation.  For more
    26   * information on the Apache Software Foundation, please see
    27   * <http://www.apache.org/>.
    28   *
    29   */
    30
    31  package org.apache.commons.httpclient.methods;
    32
    33  import java.io.IOException;
    34  import java.io.OutputStream;
    35
    36  /**
    37   * @since 3.0
    38   */
    39  public interface RequestEntity {
    40
    41      /**
    42       * Tests if {@link #writeRequest(OutputStream)} can be called more than once.
    43       *
    44       * @return <tt>true</tt> if the entity can be written to {@link OutputStream} more than once,
    45       * <tt>false</tt> otherwise.
    46       */
    47      boolean isRepeatable();
    48
    49      /**
    50       * Writes the request entity to the given stream.
    51       * @param out
    52       * @throws IOException
    53       */
    54      void writeRequest(OutputStream out) throws IOException;
    55
    56      /**
    57       * Gets the request entity's length. This method should return a non-negative value if the content
    58       * length is known or a negative value if it is not. In the latter case the
    59       * {@link org.apache.commons.httpclient.methods.EntityEnclosingMethod} will use chunk encoding to
    60       * transmit the request entity.
    61       *
    62       * @return a non-negative value when content length is known or a negative value when content length
    63       * is not known
    64       */
    65      long getContentLength();
    66
    67      /**
    68       * Gets the entity's content type.  This content type will be used as the value for the
    69       * "Content-Type" header.
    70       * @return the entity's content type
    71       * @see org.apache.commons.httpclient.HttpMethod#setRequestHeader(String, String)
    72       */
    73      String getContentType();
    74
    75  }