org.teiid.query.function.aggregate

Class ConstantFunction

java.lang.Object

org.teiid.query.function.aggregate.AggregateFunction

org.teiid.query.function.aggregate.SingleArgumentAggregateFunction

org.teiid.query.function.aggregate.ConstantFunction

public class ConstantFunction
extends SingleArgumentAggregateFunction

Field Summary

Fields inherited from class org.teiid.query.function.aggregate.AggregateFunction

argIndexes

Constructor Summary

Constructors

Constructor and Description
ConstantFunction()

Method Summary

Modifier and Type	Method and Description
void	addInputDirect(Object input, List<?> tuple, CommandContext commandContext)
Object	getResult(CommandContext commandContext) Called after all values have been processed to get the result.
void	reset() Called to reset the state of the function.
boolean	respectsNull()

Methods inherited from class org.teiid.query.function.aggregate.SingleArgumentAggregateFunction

addInputDirect, initialize, initialize

Methods inherited from class org.teiid.query.function.aggregate.AggregateFunction

addInput, filter, getArgIndexes, getOutputType, getState, getStateTypes, setArgIndexes, setConditionIndex, setState

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantFunction

public ConstantFunction()

Method Detail

reset

public void reset()

Description copied from class: AggregateFunction

Called to reset the state of the function.

Specified by:

reset in class AggregateFunction

respectsNull

public boolean respectsNull()

Overrides:

respectsNull in class AggregateFunction

addInputDirect

public void addInputDirect(Object input,
                           List<?> tuple,
                           CommandContext commandContext)
                    throws FunctionExecutionException,
                           ExpressionEvaluationException,
                           TeiidComponentException

Specified by:

addInputDirect in class SingleArgumentAggregateFunction

Throws:

FunctionExecutionException

ExpressionEvaluationException

TeiidComponentException

See Also:

org.teiid.query.function.aggregate.AggregateFunction#addInputDirect(List, CommandContext, CommandContext)

getResult

public Object getResult(CommandContext commandContext)
                 throws FunctionExecutionException,
                        ExpressionEvaluationException,
                        TeiidComponentException

Description copied from class: AggregateFunction

Called after all values have been processed to get the result.

Specified by:

getResult in class AggregateFunction

Returns:

Result value

Throws:

FunctionExecutionException

ExpressionEvaluationException

TeiidComponentException

See Also:

AggregateFunction.getResult(CommandContext)