com.aoindustries.io

Class CompressedDataInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

java.io.DataInputStream

com.aoindustries.io.CompressedDataInputStream

All Implemented Interfaces:

Closeable, DataInput, AutoCloseable

public class CompressedDataInputStream
extends DataInputStream

Adds compressed data transfer to DataInputStream. This class is not thread safe.

Author:

AO Industries, Inc.

Field Summary

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor and Description
CompressedDataInputStream(InputStream in)

Method Summary

Modifier and Type	Method and Description
int	readCompressedInt() Reads a compressed integer from the stream.
static int	readCompressedInt(InputStream in) Reads a compressed integer from the stream.
String	readCompressedUTF()
<T extends Enum<T>> T	readEnum(Class<T> enumType) Reads an Enum, represented by its Enum.name().
String	readLongUTF() Reads a string of any length.
Boolean	readNullBoolean()
<T extends Enum<T>> T	readNullEnum(Class<T> enumType) Reads an Enum, represented by its Enum.name(), supporting null.
Integer	readNullInteger()
Long	readNullLong()
String	readNullLongUTF() Reads a string of any length, supporting null.
String	readNullUTF()

Methods inherited from class java.io.DataInputStream

read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, readUTF, skipBytes

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CompressedDataInputStream

public CompressedDataInputStream(InputStream in)

Method Detail

readCompressedInt

public static int readCompressedInt(InputStream in)
                             throws IOException

Reads a compressed integer from the stream. The 31 bit pattern is as follows:

 5 bit   - 000SXXXX
 13 bit  - 001SXXXX XXXXXXXX
 22 bit  - 01SXXXXX XXXXXXXX XXXXXXXX
 31 bit  - 1SXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
 

Throws:

EOFException - if the end of file is reached

IOException

readCompressedInt

public int readCompressedInt()
                      throws IOException

Reads a compressed integer from the stream. The 31 bit pattern is as follows:

 5 bit   - 000SXXXX
 13 bit  - 001SXXXX XXXXXXXX
 22 bit  - 01SXXXXX XXXXXXXX XXXXXXXX
 31 bit  - 1SXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
 

Throws:

EOFException - if the end of file is reached

IOException

readCompressedUTF

public String readCompressedUTF()
                         throws IOException

Throws:

EOFException - if the end of file is reached

IOException

readNullUTF

public String readNullUTF()
                   throws IOException

Throws:

IOException

readLongUTF

public String readLongUTF()
                   throws IOException

Reads a string of any length.

Throws:

IOException

readNullLongUTF

public String readNullLongUTF()
                       throws IOException

Reads a string of any length, supporting null.

Throws:

IOException

readNullInteger

public Integer readNullInteger()
                        throws IOException

Throws:

IOException

readNullLong

public Long readNullLong()
                  throws IOException

Throws:

IOException

readEnum

public <T extends Enum<T>> T readEnum(Class<T> enumType)
                               throws IOException

Reads an Enum, represented by its Enum.name().

Throws:

IOException

readNullEnum

public <T extends Enum<T>> T readNullEnum(Class<T> enumType)
                                   throws IOException

Reads an Enum, represented by its Enum.name(), supporting null.

Throws:

IOException

readNullBoolean

public Boolean readNullBoolean()
                        throws IOException

Throws:

IOException