org.eclipse.birt.core.util

Class IOUtil

java.lang.Object

org.eclipse.birt.core.util.IOUtil

public class IOUtil
extends java.lang.Object

A util class to read or write primitive Java data type. Please notice, every method has a stream which might be input stream or output stream as parameters. This stream should be already added a buffered layer underlying it.

Field Summary

Fields

Modifier and Type	Field and Description
static int	INT_LENGTH
protected static java.util.logging.Logger	logger
static int	LONG_LENGTH
static int	MAX_NUMBER_OF_STREAM_BUFFER
static int	RA_STREAM_BUFFER_LENGTH

Constructor Summary

Constructors

Constructor and Description
IOUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static int	bytesToInteger(byte[] b) Assemble four bytes to an int value, make sure that the passed bytes length is larger than 4.
static long	bytesToLong(byte[] b) Assemble eight bytes to an long value, make sure that the passed bytes length larger than 8.
static int	getInt(byte[] bytes) Assemble four bytes to an int value, make sure that the passed bytes length is 4.
static int	getTypeIndex(java.lang.Object obValue) from object class to its type index value
static void	integerToBytes(int v, byte[] b)
static void	longToBytes(long v, byte[] b)
static <T> T	read(java.io.DataInputStream inputStream, java.lang.Class<T> clazz)
static boolean	readBool(java.io.InputStream inputStream) Read a bool value from an input stream
static byte[]	readBytes(java.io.DataInputStream dis) Read a list from an input stream
static double	readDouble(java.io.DataInputStream inputStream) Read a double value from an input stream
static float	readFloat(java.io.DataInputStream inputStream) Read a float value from an input stream
static int	readInt(java.io.InputStream inputStream) Read an int value from an input stream
static java.util.List	readIntList(java.io.DataInputStream dis)
static java.util.List	readList(java.io.DataInputStream dis) Read a list from an input stream
static java.util.List	readList(java.io.DataInputStream dis, java.lang.ClassLoader classLoader) Read a list from an input stream
static long	readLong(java.io.DataInputStream inputStream) Read a long value from an input stream
static java.util.Map	readMap(java.io.DataInputStream dis) Read a Map from an input stream
static java.util.Map	readMap(java.io.DataInputStream dis, java.lang.ClassLoader loader) Read a Map from an input stream
static java.lang.Object	readObject(java.io.DataInputStream dis) Currently these data types are supported.
static java.lang.Object	readObject(java.io.DataInputStream dis, java.lang.ClassLoader classLoader) Currently these data types are supported.
static short	readShort(java.io.InputStream inputStream) Read an int value from an input stream
static java.lang.String	readString(java.io.DataInputStream dis) Read a String from an input stream
static <T> void	write(java.io.DataOutputStream out, T object, java.lang.Class<T> clazz)
static void	writeBool(java.io.OutputStream outputStream, boolean bool) Write a boolean value to an output stream
static void	writeBytes(java.io.DataOutputStream dos, byte[] bytes) Write a bytes to an output stream
static void	writeDouble(java.io.DataOutputStream outputStream, double value) Write a double value to an output stream
static void	writeFloat(java.io.DataOutputStream outputStream, float value) Write a float value to an output stream
static void	writeInt(java.io.OutputStream outputStream, int value) Write an int value to an output stream
static void	writeIntList(java.io.DataOutputStream dos, java.util.List list)
static void	writeList(java.io.DataOutputStream dos, java.util.List list) Write a list to an output stream
static void	writeLong(java.io.DataOutputStream outputStream, long value) Write a long value to an output stream
static void	writeMap(java.io.DataOutputStream dos, java.util.Map map) Write a Map to an output stream
static void	writeObject(java.io.DataOutputStream dos, java.lang.Object obValue) When obValue is not supported te be serialized, an IOException will be thrown.
static void	writeRawBytes(java.io.DataOutputStream dos, byte[] bytes) Write a byte array to an output stream only with its raw content.
static void	writeShort(java.io.OutputStream outputStream, short value) Write an int value to an output stream
static void	writeString(java.io.DataOutputStream dos, java.lang.String str) Write a String value to an output stream

Methods inherited from class java.lang.Object

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

Field Detail

INT_LENGTH

public static final int INT_LENGTH

See Also:

Constant Field Values

LONG_LENGTH

public static final int LONG_LENGTH

See Also:

Constant Field Values

RA_STREAM_BUFFER_LENGTH

public static final int RA_STREAM_BUFFER_LENGTH

See Also:

Constant Field Values

MAX_NUMBER_OF_STREAM_BUFFER

public static final int MAX_NUMBER_OF_STREAM_BUFFER

See Also:

Constant Field Values

logger

protected static java.util.logging.Logger logger

Constructor Detail

IOUtil

public IOUtil()

Method Detail

read

public static final <T> T read(java.io.DataInputStream inputStream,
         java.lang.Class<T> clazz)
                    throws java.io.IOException

Throws:

java.io.IOException

write

public static final <T> void write(java.io.DataOutputStream out,
             T object,
             java.lang.Class<T> clazz)
                        throws java.io.IOException

Throws:

java.io.IOException

readShort

public static final short readShort(java.io.InputStream inputStream)
                             throws java.io.IOException

Read an int value from an input stream

Parameters:

inputStream -

Returns:

int value

Throws:

java.io.IOException

writeShort

public static final void writeShort(java.io.OutputStream outputStream,
              short value)
                             throws java.io.IOException

Write an int value to an output stream

Parameters:

outputStream -

value -

Throws:

java.io.IOException

readInt

public static final int readInt(java.io.InputStream inputStream)
                         throws java.io.IOException

Read an int value from an input stream

Parameters:

inputStream -

Returns:

int value

Throws:

java.io.IOException

writeInt

public static final void writeInt(java.io.OutputStream outputStream,
            int value)
                           throws java.io.IOException

Write an int value to an output stream

Parameters:

outputStream -

value -

Throws:

java.io.IOException

getInt

public static final int getInt(byte[] bytes)

Assemble four bytes to an int value, make sure that the passed bytes length is 4.

Parameters:

bytes -

Returns:

int value of bytes

bytesToInteger

public static final int bytesToInteger(byte[] b)

Assemble four bytes to an int value, make sure that the passed bytes length is larger than 4.

Parameters:

bytes -

Returns:

int value of bytes

bytesToLong

public static final long bytesToLong(byte[] b)

Assemble eight bytes to an long value, make sure that the passed bytes length larger than 8.

Parameters:

bytes -

Returns:

int value of bytes

integerToBytes

public static final void integerToBytes(int v,
                  byte[] b)

longToBytes

public static final void longToBytes(long v,
               byte[] b)

readBool

public static final boolean readBool(java.io.InputStream inputStream)
                              throws java.io.IOException

Read a bool value from an input stream

Parameters:

inputStream -

Returns:

boolean value

Throws:

java.io.IOException

writeBool

public static final void writeBool(java.io.OutputStream outputStream,
             boolean bool)
                            throws java.io.IOException

Write a boolean value to an output stream

Parameters:

outputStream -

bool -

Throws:

java.io.IOException

readFloat

public static final float readFloat(java.io.DataInputStream inputStream)
                             throws java.io.IOException

Read a float value from an input stream

Parameters:

inputStream -

Returns:

int value

Throws:

java.io.IOException

writeFloat

public static final void writeFloat(java.io.DataOutputStream outputStream,
              float value)
                             throws java.io.IOException

Write a float value to an output stream

Parameters:

outputStream -

value -

Throws:

java.io.IOException

readDouble

public static final double readDouble(java.io.DataInputStream inputStream)
                               throws java.io.IOException

Read a double value from an input stream

Parameters:

inputStream -

Returns:

int value

Throws:

java.io.IOException

writeDouble

public static final void writeDouble(java.io.DataOutputStream outputStream,
               double value)
                              throws java.io.IOException

Write a double value to an output stream

Parameters:

outputStream -

value -

Throws:

java.io.IOException

readLong

public static final long readLong(java.io.DataInputStream inputStream)
                           throws java.io.IOException

Read a long value from an input stream

Parameters:

inputStream -

Returns:

int value

Throws:

java.io.IOException

writeLong

public static final void writeLong(java.io.DataOutputStream outputStream,
             long value)
                            throws java.io.IOException

Write a long value to an output stream

Parameters:

outputStream -

value -

Throws:

java.io.IOException

writeRawBytes

public static final void writeRawBytes(java.io.DataOutputStream dos,
                 byte[] bytes)
                                throws java.io.IOException

Write a byte array to an output stream only with its raw content.

Parameters:

dos -

bytes - , it can not be null

Throws:

java.io.IOException

getTypeIndex

public static int getTypeIndex(java.lang.Object obValue)

from object class to its type index value

Parameters:

obValue -

Returns:

readObject

public static final java.lang.Object readObject(java.io.DataInputStream dis)
                                         throws java.io.IOException

Currently these data types are supported. Integer Float Double BigDecimal Date Time Timestamp Boolean String byte[] List Map

Returns:

Throws:

java.io.IOException

readObject

public static final java.lang.Object readObject(java.io.DataInputStream dis,
                          java.lang.ClassLoader classLoader)
                                         throws java.io.IOException

Currently these data types are supported. Integer Float Double BigDecimal Date Time Timestamp Boolean String byte[] List Map

Returns:

Throws:

java.io.IOException

writeObject

public static final void writeObject(java.io.DataOutputStream dos,
               java.lang.Object obValue)
                              throws java.io.IOException

When obValue is not supported te be serialized, an IOException will be thrown.

Parameters:

dos -

obValue -

Throws:

java.io.IOException

readString

public static final java.lang.String readString(java.io.DataInputStream dis)
                                         throws java.io.IOException

Read a String from an input stream

Parameters:

inputStream -

Returns:

an String

Throws:

java.io.IOException

writeString

public static final void writeString(java.io.DataOutputStream dos,
               java.lang.String str)
                              throws java.io.IOException

Write a String value to an output stream

Parameters:

outputStream -

str -

Throws:

java.io.IOException

readBytes

public static final byte[] readBytes(java.io.DataInputStream dis)
                              throws java.io.IOException

Read a list from an input stream

Parameters:

dos -

Returns:

Throws:

java.io.IOException

BirtException

writeBytes

public static final void writeBytes(java.io.DataOutputStream dos,
              byte[] bytes)
                             throws java.io.IOException

Write a bytes to an output stream

Parameters:

dos -

dataMap -

Throws:

java.io.IOException

BirtException

readList

public static final java.util.List readList(java.io.DataInputStream dis)
                                     throws java.io.IOException

Read a list from an input stream

Parameters:

dos -

Returns:

Throws:

java.io.IOException

BirtException

readList

public static final java.util.List readList(java.io.DataInputStream dis,
                      java.lang.ClassLoader classLoader)
                                     throws java.io.IOException

Read a list from an input stream

Parameters:

dos -

Returns:

Throws:

java.io.IOException

BirtException

readIntList

public static final java.util.List readIntList(java.io.DataInputStream dis)
                                        throws java.io.IOException

Throws:

java.io.IOException

writeList

public static final void writeList(java.io.DataOutputStream dos,
             java.util.List list)
                            throws java.io.IOException

Write a list to an output stream

Parameters:

dos -

dataMap -

Throws:

java.io.IOException

BirtException

writeIntList

public static final void writeIntList(java.io.DataOutputStream dos,
                java.util.List list)
                               throws java.io.IOException

Throws:

java.io.IOException

readMap

public static final java.util.Map readMap(java.io.DataInputStream dis)
                                   throws java.io.IOException

Read a Map from an input stream

Parameters:

dos -

Returns:

Throws:

java.io.IOException

BirtException

readMap

public static final java.util.Map readMap(java.io.DataInputStream dis,
                    java.lang.ClassLoader loader)
                                   throws java.io.IOException

Read a Map from an input stream

Parameters:

dos -

Returns:

Throws:

java.io.IOException

BirtException

writeMap

public static final void writeMap(java.io.DataOutputStream dos,
            java.util.Map map)
                           throws java.io.IOException

Write a Map to an output stream

Parameters:

dos -

map -

Throws:

java.io.IOException

BirtException