com.hardcode.gdbms.engine.values
Class NullValue

java.lang.Object
  com.hardcode.gdbms.engine.values.AbstractValue
      com.hardcode.gdbms.engine.values.NullValue

All Implemented Interfaces:

Value, java.io.Serializable

public class NullValue
extends AbstractValue
implements java.io.Serializable

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Author:

Fernando González Cortés

See Also:

Serialized Form

Field Summary

Fields inherited from interface com.hardcode.gdbms.engine.values.Value

BINARY, BOOLEAN, BYTE, DATE, DOUBLE, FLOAT, INT, LONG, SHORT, STRING, TIME, TIMESTAMP

Constructor Summary

NullValue()

Method Summary

Value	and(Value value)
int	doHashCode() The hashCode implementation.
Value	equals(Value value)
java.lang.String	getStringValue(ValueWriter writer) Gets the string representation of the value as it is defined in the specified ValueWriter
int	getType() Gets the type of the value
Value	greater(Value value)
Value	greaterEqual(Value value)
Value	less(Value value)
Value	lessEqual(Value value)
Value	like(Value value)
Value	notEquals(Value value)
Value	or(Value value)
java.lang.String	toString() DOCUMENT ME!

Methods inherited from class com.hardcode.gdbms.engine.values.AbstractValue

doEquals, equals, hashCode, inversa, producto, suma

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

NullValue

public NullValue()

Method Detail

toString

public java.lang.String toString()

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Overrides:

toString in class java.lang.Object

Returns:

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doHashCode

public int doHashCode()

Description copied from interface: Value

The hashCode implementation. Every value with the same semantic information must return the same int

Specified by:

doHashCode in interface Value

Returns:

integer

See Also:

Value.doHashCode()

and

public Value and(Value value)
          throws IncompatibleTypesException

Specified by:

and in interface Value

Overrides:

and in class AbstractValue

Throws:

IncompatibleTypesException

See Also:

com.hardcode.gdbms.engine.instruction.Operations#and(com.hardcode.gdbms.engine.values.value);

equals

public Value equals(Value value)
             throws IncompatibleTypesException

Specified by:

equals in interface Value

Overrides:

equals in class AbstractValue

Throws:

IncompatibleTypesException

See Also:

com.hardcode.gdbms.engine.instruction.Operations#equals(com.hardcode.gdbms.engine.values.Value)

greater

public Value greater(Value value)
              throws IncompatibleTypesException

Specified by:

greater in interface Value

Overrides:

greater in class AbstractValue

Throws:

IncompatibleTypesException

See Also:

com.hardcode.gdbms.engine.instruction.Operations#greater(com.hardcode.gdbms.engine.values.Value)

greaterEqual

public Value greaterEqual(Value value)
                   throws IncompatibleTypesException

Specified by:

greaterEqual in interface Value

Overrides:

greaterEqual in class AbstractValue

Throws:

IncompatibleTypesException

See Also:

com.hardcode.gdbms.engine.instruction.Operations#greaterEqual(com.hardcode.gdbms.engine.values.Value)

less

public Value less(Value value)
           throws IncompatibleTypesException

Specified by:

less in interface Value

Overrides:

less in class AbstractValue

Throws:

IncompatibleTypesException

See Also:

com.hardcode.gdbms.engine.instruction.Operations#less(com.hardcode.gdbms.engine.values.Value)

lessEqual

public Value lessEqual(Value value)
                throws IncompatibleTypesException

Specified by:

lessEqual in interface Value

Overrides:

lessEqual in class AbstractValue

Throws:

IncompatibleTypesException

See Also:

com.hardcode.gdbms.engine.instruction.Operations#lessEqual(com.hardcode.gdbms.engine.values.Value)

like

public Value like(Value value)
           throws IncompatibleTypesException

Specified by:

like in interface Value

Overrides:

like in class AbstractValue

Throws:

IncompatibleTypesException

See Also:

com.hardcode.gdbms.engine.values.Operations#like(com.hardcode.gdbms.engine.values.Value)

notEquals

public Value notEquals(Value value)
                throws IncompatibleTypesException

Specified by:

notEquals in interface Value

Overrides:

notEquals in class AbstractValue

Throws:

IncompatibleTypesException

See Also:

com.hardcode.gdbms.engine.instruction.Operations#notEquals(com.hardcode.gdbms.engine.values.Value)

or

public Value or(Value value)
         throws IncompatibleTypesException

Specified by:

or in interface Value

Overrides:

or in class AbstractValue

Throws:

IncompatibleTypesException

See Also:

com.hardcode.gdbms.engine.instruction.Operations#or(com.hardcode.gdbms.engine.values.value);

getStringValue

public java.lang.String getStringValue(ValueWriter writer)

Description copied from interface: Value

Gets the string representation of the value as it is defined in the specified ValueWriter

Specified by:

getStringValue in interface Value

Parameters:

writer - Specifies the string representation for the values

Returns:

String

See Also:

com.hardcode.gdbms.engine.values.Value#getStringValue(com.hardcode.gdbms.engine.data.driver.ValueWriter)

getType

public int getType()

Description copied from interface: Value

Gets the type of the value

Specified by:

getType in interface Value

Returns:

a java.sql.Types constant

See Also:

Value.getType()