com.pervasive.datarush.operators.group

Class SortedGroupHandler

java.lang.Object

com.pervasive.datarush.operators.AbstractLogicalOperator

com.pervasive.datarush.operators.StreamingOperator

com.pervasive.datarush.operators.ExecutableOperator

com.pervasive.datarush.operators.group.SortedGroupHandler

All Implemented Interfaces:

LogicalOperator, PipelineOperator<RecordPort>, RecordPipelineOperator

public abstract class SortedGroupHandler
extends ExecutableOperator
implements RecordPipelineOperator

Common base class for all processes that need to detect group boundaries

Field Summary

Fields

Modifier and Type	Field and Description
protected RecordPort	inputPort
protected RecordPort	outputPort

Constructor Summary

Constructors

Constructor and Description
SortedGroupHandler() Default constructor.

Method Summary

Modifier and Type	Method and Description
protected RecordInput	current(ExecutionContext ctx) Returns the current copy of the input port
protected void	execute(ExecutionContext ctx) Final execute method, subclasses should override the various abstract methods of this class to receive events.
RecordPort	getInput() Returns the input port
String[]	getKeys() Returns the keys to be used for detecting group boundaries
protected int	getNumInputCopies(LogicalPort port) Overridden to declare that we require 2 copies of input
RecordPort	getOutput() Returns the output port
protected RecordInput	lookahead(ExecutionContext ctx) Returns the lookahead copy of the input port
void	setKeys(String[] keys) Sets the keys to be used for detecting group boundaries

Methods inherited from class com.pervasive.datarush.operators.ExecutableOperator

cloneForExecution, getPortSettings, handleInactiveOutput

Methods inherited from class com.pervasive.datarush.operators.StreamingOperator

computeMetadata

Methods inherited from class com.pervasive.datarush.operators.AbstractLogicalOperator

disableParallelism, getInputPorts, getOutputPorts, newInput, newInput, newOutput, newRecordInput, newRecordInput, newRecordOutput, notifyError

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.pervasive.datarush.operators.LogicalOperator

disableParallelism, getInputPorts, getOutputPorts

Field Detail

inputPort

protected final RecordPort inputPort

outputPort

protected final RecordPort outputPort

Constructor Detail

SortedGroupHandler

public SortedGroupHandler()

Default constructor.

Method Detail

getKeys

public final String[] getKeys()

Returns the keys to be used for detecting group boundaries

Returns:

the key fields on which data is grouped

setKeys

public final void setKeys(String[] keys)

Sets the keys to be used for detecting group boundaries

Parameters:

keys - key fields on which data is grouped

getInput

public final RecordPort getInput()

Description copied from interface: PipelineOperator

Returns the input port

Specified by:

getInput in interface PipelineOperator<RecordPort>

Returns:

the input port

getOutput

public final RecordPort getOutput()

Description copied from interface: PipelineOperator

Returns the output port

Specified by:

getOutput in interface PipelineOperator<RecordPort>

Returns:

the output port

execute

protected final void execute(ExecutionContext ctx)

Final execute method, subclasses should override the various abstract methods of this class to receive events.

Specified by:

execute in class ExecutableOperator

Parameters:

ctx - the execution context

getNumInputCopies

protected int getNumInputCopies(LogicalPort port)

Overridden to declare that we require 2 copies of input

Overrides:

getNumInputCopies in class ExecutableOperator

Parameters:

port - the port

Returns:

the number of input copies for the port

current

protected final RecordInput current(ExecutionContext ctx)

Returns the current copy of the input port

Parameters:

ctx - the execution context

Returns:

the current copy of the input port

lookahead

protected final RecordInput lookahead(ExecutionContext ctx)

Returns the lookahead copy of the input port

Parameters:

ctx - the execution context

Returns:

the current copy of the input port