org.axiondb.types
Class LOBType

java.lang.Object
  org.axiondb.types.BaseDataType
      org.axiondb.types.LOBType

All Implemented Interfaces:

Comparator, DataType, DataTypeFactory, Serializable

Direct Known Subclasses:

CompressedLOBType

public class LOBType

extends BaseDataType

A DataType representing a Large Object (LOB), for example a Clob or Blob.

Version:

$Revision: 1.12 $ $Date: 2004/09/09 23:47:42 $

See Also:

Serialized Form

Constructor Summary

LOBType()

Method Summary

boolean	accepts(Object value) Return true if a field of my type can be assigned the given non- null value , false otherwise.
Object	convert(Object value) Converts an acceptablevalue to one of the appropriate type.
int	getJdbcType() Returns the JDBC type codemost closely matching this type.
File	getLobDir()
protected RandomAccessFile	getLobFile()
short	getSearchableCode() Code indicating how much WHERE ...
boolean	isCaseSensitive() For character and string-related types, indicates whether type acknowledges case when storing and retrieving values
protected BlobSource	makeBlobSource(LobLocator loc)
protected ClobSource	makeClobSource(LobLocator loc)
DataType	makeNewInstance()
Object	read(DataInput in) Instantiate an object of my type from the given DataInput.
void	setLobDir(File lobDir)
Blob	toBlob(Object value) Convert the given non- null value to a Blob, or throw a AxionException.
Clob	toClob(Object value) Convert the given non- null value to a Clob, or throw a AxionException.
String	toString()
String	toString(Object value) Convert the given non- null value to a String, or throw a AxionException.
void	write(Object value, DataOutput out) Write an object of my type to the given DataOutput.
protected LobLocator	writeByteArrayBlob(ByteArrayBlob value)
protected LobLocator	writeStringClob(StringClob value)

Methods inherited from class org.axiondb.types.BaseDataType

compare, getColumnDisplaySize, getComparator, getLiteralPrefix, getLiteralSuffix, getNullableCode, getPrecision, getPreferredValueClassName, getScale, isCurrency, isUnsigned, successor, supportsSuccessor, toBigDecimal, toBigInteger, toBoolean, toByte, toByteArray, toDate, toDouble, toFloat, toInt, toLong, toNumber, toShort, toTime, toTimestamp, toURL

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

LOBType

public LOBType()

Method Detail

getJdbcType

public int getJdbcType()

Description copied from interface: DataType

Returns the JDBC type codemost closely matching this type.

Specified by:

getJdbcType in interface DataType

Specified by:

getJdbcType in class BaseDataType

isCaseSensitive

public boolean isCaseSensitive()

Description copied from interface: DataType

For character and string-related types, indicates whether type acknowledges case when storing and retrieving values

Specified by:

isCaseSensitive in interface DataType

Overrides:

isCaseSensitive in class BaseDataType

accepts

public boolean accepts(Object value)

Description copied from interface: DataType

Return true if a field of my type can be assigned the given non- null value , false otherwise.

Specified by:

accepts in interface DataType

Specified by:

accepts in class BaseDataType

convert

public Object convert(Object value)
               throws IllegalArgumentException

Description copied from interface: DataType

Converts an acceptablevalue to one of the appropriate type.

Specified by:

convert in interface DataType

Specified by:

convert in class BaseDataType

Throws:

IllegalArgumentException

toBlob

public Blob toBlob(Object value)
            throws AxionException

Description copied from interface: DataType

Convert the given non- null value to a Blob, or throw a AxionException.

Specified by:

toBlob in interface DataType

Overrides:

toBlob in class BaseDataType

Throws:

AxionException

toClob

public Clob toClob(Object value)
            throws AxionException

Description copied from interface: DataType

Convert the given non- null value to a Clob, or throw a AxionException.

Specified by:

toClob in interface DataType

Overrides:

toClob in class BaseDataType

Throws:

AxionException

toString

public String toString(Object value)
                throws AxionException

Description copied from interface: DataType

Convert the given non- null value to a String, or throw a AxionException.

Specified by:

toString in interface DataType

Overrides:

toString in class BaseDataType

Throws:

AxionException

toString

public String toString()

makeNewInstance

public DataType makeNewInstance()

Specified by:

makeNewInstance in interface DataTypeFactory

Specified by:

makeNewInstance in class BaseDataType

read

public Object read(DataInput in)
            throws IOException

Description copied from interface: DataType

Instantiate an object of my type from the given DataInput. The next sequence of bytes to be read from the DataInput will have been written by DataType.write(java.lang.Object, java.io.DataOutput).

Specified by:

read in interface DataType

Specified by:

read in class BaseDataType

Throws:

IOException

write

public void write(Object value,
                  DataOutput out)
           throws IOException

Description copied from interface: DataType

Write an object of my type to the given DataOutput.

Specified by:

write in interface DataType

Specified by:

write in class BaseDataType

Throws:

IOException

getLobDir

public File getLobDir()

setLobDir

public void setLobDir(File lobDir)

getSearchableCode

public short getSearchableCode()

Description copied from interface: DataType

Code indicating how much WHERE ... LIKE support is available across a column of this type

Specified by:

getSearchableCode in interface DataType

Overrides:

getSearchableCode in class BaseDataType

getLobFile

protected RandomAccessFile getLobFile()

writeStringClob

protected LobLocator writeStringClob(StringClob value)
                              throws IOException

Throws:

IOException

writeByteArrayBlob

protected LobLocator writeByteArrayBlob(ByteArrayBlob value)
                                 throws IOException

Throws:

IOException

makeBlobSource

protected BlobSource makeBlobSource(LobLocator loc)
                             throws AxionException

Throws:

AxionException

makeClobSource

protected ClobSource makeClobSource(LobLocator loc)
                             throws AxionException

Throws:

AxionException