org.axiondb.functions
Class ComparisonFunction
java.lang.Object
org.axiondb.BaseSelectable
org.axiondb.functions.BaseFunction
org.axiondb.functions.ComparisonFunction
- All Implemented Interfaces:
- Serializable, Function, ConcreteFunction, ScalarFunction, Selectable
- Direct Known Subclasses:
- EqualFunction, GreaterThanFunction, GreaterThanOrEqualFunction, LessThanFunction, LessThanOrEqualFunction, NotEqualFunction
public abstract class ComparisonFunction
- extends BaseFunction
- implements ScalarFunction
- Version:
- $Revision: 1.5 $ $Date: 2003/08/25 23:41:10 $
- See Also:
- Serialized Form
Methods inherited from class org.axiondb.functions.BaseFunction |
addArgument, getAlias, getArgument, getArgumentCount, getLabel, getName, setAlias, setArgument, setName, setVariableContext, toString |
ComparisonFunction
public ComparisonFunction(String name)
getDataType
public final DataType getDataType()
- Specified by:
getDataType
in interface Selectable
- Specified by:
getDataType
in class BaseFunction
isValid
public final boolean isValid()
- Specified by:
isValid
in interface ConcreteFunction
- Specified by:
isValid
in class BaseFunction
evaluate
public final Object evaluate(RowDecorator row)
throws AxionException
- Specified by:
evaluate
in interface ScalarFunction
- Specified by:
evaluate
in interface Selectable
- Throws:
AxionException
compare
protected abstract boolean compare(int value)
flip
public ComparisonFunction flip()
isColumnColumn
public boolean isColumnColumn()
isColumnLiteral
public boolean isColumnLiteral()