Package org.yamcs.yarch

Class WindowProcessor

java.lang.Object

org.yamcs.yarch.WindowProcessor

public abstract class WindowProcessor
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
TupleDefinition	aggInputDef
protected List<CompiledAggregateExpression>	aggList
protected static List<Tuple>	EMPTY_RETURN

Constructor Summary

Constructors

Constructor	Description
WindowProcessor()

Method Summary

Modifier and Type	Method	Description
static WindowProcessor	getInstance(WindowSpecification spec, TupleDefinition aggInputDef, List<CompiledAggregateExpression> aggList, TupleDefinition aggregateOutputDef)
abstract List<Tuple>	newData(Tuple tuple)
protected abstract List<Tuple>	streamClosed()	Called when the input stream closes, the window has the opportunity to emit some tuples before closure

Methods inherited from class java.lang.Object

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

Field Detail

aggList

protected List<CompiledAggregateExpression> aggList

EMPTY_RETURN

protected static final List<Tuple> EMPTY_RETURN

aggInputDef

public TupleDefinition aggInputDef

Constructor Detail

WindowProcessor

public WindowProcessor()

Method Detail

getInstance

public static WindowProcessor getInstance(WindowSpecification spec,
                                          TupleDefinition aggInputDef,
                                          List<CompiledAggregateExpression> aggList,
                                          TupleDefinition aggregateOutputDef)

newData

public abstract List<Tuple> newData(Tuple tuple)

streamClosed

protected abstract List<Tuple> streamClosed()

Called when the input stream closes, the window has the opportunity to emit some tuples before closure