org.axiondb.types
Class ObjectType

java.lang.Object
  extended by org.axiondb.types.BaseDataType
      extended by 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.