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/*
* BodyEncoder.java February 2007
*
* Copyright (C) 2001, Niall Gallagher <niallg@users.sf.net>
*
* 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.simpleframework.http.core;
import java.io.IOException;
import java.nio.ByteBuffer;
/**
* The <code>BodyEncoder</code> object is used to encode content from
* the HTTP response. This acts in much the same way as an output
* stream would. As a requirement of RFC 2616 any HTTP/1.1 compliant
* server must support a set of transfer types. These are fixed size,
* chunked encoded, and connection close. A producer implementation
* is required to implement one of this formats for delivery of the
* response message.
*
* @author Niall Gallagher
*
* @see org.simpleframework.http.core.BodyObserver
*/
interface BodyEncoder {
/**
* This method is used to encode the provided array of bytes in
* a HTTP/1.1 compliant format and sent it to the client. Once
* the data has been encoded it is handed to the transport layer
* within the server, which may choose to buffer the data if the
* content is too small to send efficiently or if the socket is
* not write ready.
*
* @param array this is the array of bytes to send to the client
*/
void encode(byte[] array) throws IOException;
/**
* This method is used to encode the provided array of bytes in
* a HTTP/1.1 compliant format and sent it to the client. Once
* the data has been encoded it is handed to the transport layer
* within the server, which may choose to buffer the data if the
* content is too small to send efficiently or if the socket is
* not write ready.
*
* @param array this is the array of bytes to send to the client
* @param off this is the offset within the array to send from
* @param size this is the number of bytes that are to be sent
*/
void encode(byte[] array, int off, int size) throws IOException;
/**
* This method is used to encode the provided buffer of bytes in
* a HTTP/1.1 compliant format and sent it to the client. Once
* the data has been encoded it is handed to the transport layer
* within the server, which may choose to buffer the data if the
* content is too small to send efficiently or if the socket is
* not write ready.
*
* @param buffer this is the buffer of bytes to send to the client
*/
void encode(ByteBuffer buffer) throws IOException;
/**
* This method is used to encode the provided buffer of bytes in
* a HTTP/1.1 compliant format and sent it to the client. Once
* the data has been encoded it is handed to the transport layer
* within the server, which may choose to buffer the data if the
* content is too small to send efficiently or if the socket is
* not write ready.
*
* @param buffer this is the buffer of bytes to send to the client
* @param off this is the offset within the buffer to send from
* @param size this is the number of bytes that are to be sent
*/
void encode(ByteBuffer buffer, int off, int size) throws IOException;
/**
* This method is used to flush the contents of the buffer to
* the client. This method will block until such time as all of
* the data has been sent to the client. If at any point there
* is an error sending the content an exception is thrown.
*/
void flush() throws IOException;
/**
* This is used to signal to the producer that all content has
* been written and the user no longer needs to write. This will
* either close the underlying transport or it will notify the
* monitor that the response has completed and the next request
* can begin. This ensures the content is flushed to the client.
*/
void close() throws IOException;
}
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