/*
* 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.
*/
package org.apache.coyote;
import java.io.IOException;
import org.apache.tomcat.util.net.ApplicationBufferHandler;
/**
* This class is only for internal use in the protocol implementation. All reading from Tomcat (or adapter) should be
* done using Request.doRead().
*/
public interface InputBuffer {
/**
* Read from the input stream into the ByteBuffer provided by the ApplicationBufferHandler. IMPORTANT: the current
* model assumes that the protocol will 'own' the ByteBuffer and return a pointer to it.
*
* @param handler ApplicationBufferHandler that provides the buffer to read data into.
*
* @return The number of bytes that have been added to the buffer or -1 for end of stream
*
* @throws IOException If an I/O error occurs reading from the input stream
*/
int doRead(ApplicationBufferHandler handler) throws IOException;
/**
* Obtain an estimate of the number of bytes that can be read without blocking. Typically, this will be the number
* of available bytes known to be buffered.
*
* @return The number of bytes that can be read without blocking
*/
int available();
}