org.axiondb.types
Class ObjectType

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

All Implemented Interfaces:

java.io.Serializable, java.util.Comparator, DataType, DataTypeFactory

public class ObjectType
extends BaseDataType

A DataTyperepresenting a Serializableobject value.

Version:

$Revision: 1.2 $ $Date: 2002/07/02 21:04:57 $

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.axiondb.DataType

DataType.BinaryRepresentation, DataType.ExactNumeric, DataType.NonFixedPrecision

Constructor Summary

ObjectType()

Method Summary

boolean	accepts(java.lang.Object value) Returns true iff value is null or a Serializable.object
java.lang.Object	convert(java.lang.Object value) Returns a Stringconverted from the given value , or throws IllegalArgumentExceptionif the given value isn't acceptable.
int	getColumnDisplaySize() Value returned by ResultSetMetaData#getColumnDisplaySizefor this data type.
int	getJdbcType() Returns the JDBC type codemost closely matching this type.
java.lang.String	getPreferredValueClassName() Returns the "normal" type returned by DataType.convert(java.lang.Object).
DataType	makeNewInstance() Creates a new instance of this DataType implementation.
java.lang.Object	read(java.io.DataInput in) Instantiate an object of my type from the given DataInput.
java.lang.Object	successor(java.lang.Object value) Returns the successor for the given value.
boolean	supportsSuccessor() Returns true if the DataType.successor(java.lang.Object)method is supported, false otherwise.
java.lang.String	toString() Returns "string"
void	write(java.lang.Object value, java.io.DataOutput out) Writes the given value to the given DataOutput.

Methods inherited from class org.axiondb.types.BaseDataType

compare, getComparator, getLiteralPrefix, getLiteralSuffix, getNullableCode, getPrecision, getPrecisionRadix, getScale, getSearchableCode, isCaseSensitive, isCurrency, isUnsigned, toBigDecimal, toBigInteger, toBlob, toBoolean, toByte, toByteArray, toClob, toDate, toDouble, toFloat, toInt, toLong, toNumber, toShort, toString, 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

ObjectType

public ObjectType()

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

getPreferredValueClassName

public java.lang.String getPreferredValueClassName()

Description copied from interface: DataType

Returns the "normal" type returned by DataType.convert(java.lang.Object). Returns java.lang.Object if unknown.

Specified by:

getPreferredValueClassName in interface DataType

Overrides:

getPreferredValueClassName in class BaseDataType

See Also:

AxionResultSetMetaData.getColumnClassName(int)

toString

public java.lang.String toString()

Returns "string"

Overrides:

toString in class java.lang.Object

Returns:

"string"

accepts

public boolean accepts(java.lang.Object value)

Returns true iff value is null or a Serializable.object

Specified by:

accepts in interface DataType

Specified by:

accepts in class BaseDataType

Parameters:

value - non- null value

convert

public java.lang.Object convert(java.lang.Object value)
                         throws java.lang.IllegalArgumentException

Returns a Stringconverted from the given value , or throws IllegalArgumentExceptionif the given value isn't acceptable.

Specified by:

convert in interface DataType

Specified by:

convert in class BaseDataType

Throws:

java.lang.IllegalArgumentException

getColumnDisplaySize

public int getColumnDisplaySize()

Description copied from interface: DataType

Value returned by ResultSetMetaData#getColumnDisplaySizefor this data type.

Specified by:

getColumnDisplaySize in interface DataType

Overrides:

getColumnDisplaySize in class BaseDataType

See Also:

ResultSetMetaData.getColumnDisplaySize(int)

supportsSuccessor

public boolean supportsSuccessor()

Description copied from interface: DataType

Returns true if the DataType.successor(java.lang.Object)method is supported, false otherwise.

Specified by:

supportsSuccessor in interface DataType

Overrides:

supportsSuccessor in class BaseDataType

successor

public java.lang.Object successor(java.lang.Object value)
                           throws java.lang.IllegalArgumentException

Description copied from interface: DataType

Returns the successor for the given value. For example, the successor of the integer 1 is 2.

Specified by:

successor in interface DataType

Overrides:

successor in class BaseDataType

Throws:

java.lang.IllegalArgumentException

read

public java.lang.Object read(java.io.DataInput in)
                      throws java.io.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:

java.io.IOException

See Also:

write(java.lang.Object, java.io.DataOutput)

write

public void write(java.lang.Object value,
                  java.io.DataOutput out)
           throws java.io.IOException

Writes the given value to the given DataOutput. Null values are written as "null", false, the non-null String "null" is written as "null", true, all other values are written directly.

Specified by:

write in interface DataType

Specified by:

write in class BaseDataType

Parameters:

value - the value to write, which must be acceptable

Throws:

java.io.IOException

makeNewInstance

public DataType makeNewInstance()

Description copied from interface: DataType

Creates a new instance of this DataType implementation.

Specified by:

makeNewInstance in interface DataType

Specified by:

makeNewInstance in interface DataTypeFactory

Specified by:

makeNewInstance in class BaseDataType

Returns:

new instance of this DataType implementation.