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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2008-2015 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
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* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
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*
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* only if the new code is made subject to such option by the copyright
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*/
package com.pdd.pop.ext.glassfish.grizzly.streams;
import java.io.IOException;
import java.util.concurrent.Future;
import com.pdd.pop.ext.glassfish.grizzly.Buffer;
import com.pdd.pop.ext.glassfish.grizzly.CompletionHandler;
import com.pdd.pop.ext.glassfish.grizzly.Connection;
import com.pdd.pop.ext.glassfish.grizzly.GrizzlyFuture;
import com.pdd.pop.ext.glassfish.grizzly.Transformer;
import com.pdd.pop.ext.glassfish.grizzly.utils.conditions.Condition;
/**
* Interface that defines methods for reading primitive types and arrays
* of primitive types from a stream. A stream is implemented as a sequence
* of {@link Buffer}s which are supplied by the receiveData method.
* The stream consumes the {@link Buffer}s: after all data has been read from
* a {@link Buffer}, {@link Buffer#dispose()} is called.
*
* Note, that StreamReader implementation may not be thread-safe.
*
* @see StreamWriter
* @see Connection
*
* @author Ken Cavanaugh
* @author Alexey Stashok
*/
public interface StreamReader extends Stream {
/**
* Method returns {@link Future}, using which it's possible check if
* StreamReader has required amount of bytes available
* for reading reading.
*
* @param size number of bytes, which should become available on
* StreamReader.
* @return {@link Future}, using which it's possible to check whether
* StreamReader has required amount of bytes available for reading.
*/
GrizzlyFuture notifyAvailable(int size);
/**
* Method returns {@link Future}, using which it's possible check if
* StreamReader has required amount of bytes available
* for reading reading.
* {@link CompletionHandler} is also passed to get notified, once required
* number of bytes will become available for reading.
*
* @param size number of bytes, which should become available on
* StreamReader.
* @param completionHandler {@link CompletionHandler}, which will be notified
* once required number of bytes will become available.
*
* @return {@link Future}, using which it's possible to check whether
* StreamReader has required amount of bytes available for reading.
*/
GrizzlyFuture notifyAvailable(int size,
CompletionHandler completionHandler);
/**
* Method returns {@link Future}, using which it's possible check if
* StreamReader meets specific {@link Condition}.
*
* @param condition {@link Condition} StreamReader should meet.
*
* @return {@link Future}, using which it's possible to check whether
* StreamReader meets the required {@link Condition}.
*/
GrizzlyFuture notifyCondition(Condition condition);
/**
* Method returns {@link Future}, using which it's possible check if
* StreamReader meets specific {@link Condition}.
* {@link CompletionHandler} is also passed to get notified, once
* the {@link Condition} will be satisfied.
*
* @param condition {@link Condition} StreamReader should meet.
* @param completionHandler {@link CompletionHandler}, which will be
* notified, once the {@link Condition} will be satisfied.
*
* @return {@link Future}, using which it's possible to check whether
* StreamReader meets the required {@link Condition}.
*/
GrizzlyFuture notifyCondition(Condition condition,
CompletionHandler completionHandler);
/**
* Return true if StreamReader has available data, which
* could be read, or false otherwise.
*
* @return true if StreamReader has available data, which
* could be read, or false otherwise.
*/
boolean hasAvailable();
/**
* Return the number of bytes available for get calls. An attempt to
* get more data than is present in the stream will either result in
* blocking (if isBlocking() returns true) or a BufferUnderflowException.
*/
int available();
/**
* Get the next boolean in the stream. Requires 1 byte.
*/
boolean readBoolean() throws IOException;
/**
* Get the next byte in the stream. Requires 1 byte.
*/
byte readByte() throws IOException;
/**
* Get the next character in the stream. Requires 2 bytes.
*/
char readChar() throws IOException;
/** Get the next short in the stream. Requires 2 bytes.
*/
short readShort() throws IOException;
/**
* Get the next int in the stream. Requires 4 bytes.
*/
int readInt() throws IOException;
/**
* Get the next long in the stream. Requires 8 bytes.
*/
long readLong() throws IOException;
/**
* Get the next float in the stream. Requires 4 bytes.
*/
float readFloat() throws IOException;
/**
* Get the next double in the stream. Requires 8 bytes.
*/
double readDouble() throws IOException;
/**
* Fill data with booleans (byte 1=true, 0=false) from the stream.
* If this method returns normally, data has been filled completely.
* Requires data.length bytes.
*/
void readBooleanArray(boolean[] data) throws IOException;
/**
* Fill data with bytes from the stream.
* If this method returns normally, data has been filled completely.
* Requires data.length bytes.
*/
void readByteArray(byte[] data) throws IOException;
/**
* Fill data with bytes from the stream.
* If this method returns normally, data has been filled completely.
* Requires data.length bytes.
*/
void readByteArray(byte[] data, int offset, int length) throws IOException;
/**
* Fill the buffer with data from the stream (that is, copy data
* from the stream to fill buffer from position to limit).
* This is useful when data must be read
* from one stream and then added to another stream for
* further processing.
*/
void readBytes(Buffer buffer) throws IOException;
/**
* Fill data with characters from the stream.
* If this method returns normally, data has been filled completely.
* Requires 2*data.length bytes.
*/
void readCharArray(char[] data) throws IOException;
/**
* Fill data with characters from the stream.
* If this method returns normally, data has been filled completely.
* Requires 2*data.length bytes.
*/
void readShortArray(short[] data) throws IOException;
/**
* Fill data with characters from the stream.
* If this method returns normally, data has been filled completely.
* Requires 4*data.length bytes.
*/
void readIntArray(int[] data) throws IOException;
/**
* Fill data with characters from the stream.
* If this method returns normally, data has been filled completely.
* Requires 8*data.length bytes.
*/
void readLongArray(long[] data) throws IOException;
/**
* Fill data with characters from the stream.
* If this method returns normally, data has been filled completely.
* Requires 4*data.length bytes.
*/
void readFloatArray(float[] data) throws IOException;
/**
* Fill data with characters from the stream.
* If this method returns normally, data has been filled completely.
* Requires 8*data.length bytes.
*/
void readDoubleArray(double[] data) throws IOException;
void skip(int length);
/**
* Read and decode data from the StreamReader
*
* @param decoded data type
* @param decoder {@link Transformer}
* @return {@link Future}, which will hold the decoding state.
*/
GrizzlyFuture decode(Transformer decoder);
/**
* Read and decode data from the StreamReader
*
* @param decoded data type
* @param decoder {@link Transformer}
* @param completionHandler {@link CompletionHandler}, which will be
* notified, when decoder will become ready.
* @return {@link Future}, which will hold the decoding state.
*/
GrizzlyFuture decode(Transformer decoder,
CompletionHandler completionHandler);
/**
* Returns true, if StreamReader has been closed,
* or false otherwise.
*
* @return true, if StreamReader has been closed,
* or false otherwise.
*/
boolean isClosed();
boolean isSupportBufferWindow();
Buffer getBufferWindow();
Buffer takeBufferWindow();
}
