org.hibernate.type.descriptor.java

Class DataHelper

java.lang.Object

org.hibernate.type.descriptor.java.DataHelper

public final class DataHelper
extends Object

A help for dealing with BLOB and CLOB data

Method Summary

Modifier and Type	Method and Description
static byte[]	extractBytes(InputStream inputStream) Extract by bytes from the given stream.
static byte[]	extractBytes(InputStream inputStream, long start, int length) Extract a portion of the bytes from the given stream.
static String	extractString(Clob value) Extract the contents of the given Clob as a string.
static String	extractString(Reader reader) Extract the contents of the given reader/stream as a string.
static String	extractString(Reader reader, int lengthHint) Extract the contents of the given reader/stream as a string.
static boolean	isNClob(Class type)
static InputStream	subStream(InputStream inputStream, long start, int length) Extract a portion of the bytes from the given stream., wrapping them in a new stream.
static Object	subStream(Reader characterStream, long start, int length) Extract a portion of a reader, wrapping the portion in a new reader.

Methods inherited from class java.lang.Object

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

Method Detail

isNClob

public static boolean isNClob(Class type)

extractString

public static String extractString(Reader reader)

Extract the contents of the given reader/stream as a string. The reader will be closed.

Parameters:

reader - The reader for the content

Returns:

The content as string

extractString

public static String extractString(Reader reader,
                                   int lengthHint)

Extract the contents of the given reader/stream as a string. The reader will be closed.

Parameters:

reader - The reader for the content

lengthHint - if the length is known in advance the implementation can be slightly more efficient

Returns:

The content as string

subStream

public static Object subStream(Reader characterStream,
                               long start,
                               int length)

Extract a portion of a reader, wrapping the portion in a new reader.

Parameters:

characterStream - The reader for the content

start - The start position/offset (0-based, per general stream/reader contracts).

length - The amount to extract

Returns:

The content portion as a reader

extractBytes

public static byte[] extractBytes(InputStream inputStream)

Extract by bytes from the given stream.

Parameters:

inputStream - The stream of bytes.

Returns:

The contents as a byte[]

extractBytes

public static byte[] extractBytes(InputStream inputStream,
                                  long start,
                                  int length)

Extract a portion of the bytes from the given stream.

Parameters:

inputStream - The stream of bytes.

start - The start position/offset (0-based, per general stream/reader contracts).

length - The amount to extract

Returns:

The extracted bytes

subStream

public static InputStream subStream(InputStream inputStream,
                                    long start,
                                    int length)

Extract a portion of the bytes from the given stream., wrapping them in a new stream.

Parameters:

inputStream - The stream of bytes.

start - The start position/offset (0-based, per general stream/reader contracts).

length - The amount to extract

Returns:

The extracted bytes as a stream

extractString

public static String extractString(Clob value)

Extract the contents of the given Clob as a string.

Parameters:

value - The clob to to be extracted from

Returns:

The content as string