org.pentaho.di.trans.steps.joinrows
Class JoinRows

java.lang.Object
  org.pentaho.di.trans.step.BaseStep
      org.pentaho.di.trans.steps.joinrows.JoinRows

All Implemented Interfaces:

HasLogChannelInterface, LoggingObjectInterface, VariableSpace, StepInterface

public class JoinRows
extends BaseStep
implements StepInterface

Performs a cartesian product between 2 or more input streams.

Since:

29-apr-2003

Author:

Matt

Field Summary

Fields inherited from class org.pentaho.di.trans.step.BaseStep

first, linesInput, linesOutput, linesRead, linesRejected, linesSkipped, linesUpdated, linesWritten, terminator, terminator_rows

Constructor Summary

JoinRows(StepMeta stepMeta, StepDataInterface stepDataInterface, int copyNr, TransMeta transMeta, Trans trans)

Method Summary

void	batchComplete() Calling this method will alert the step that we finished passing a batch of records to the step.
void	dispose(StepMetaInterface smi, StepDataInterface sdi) Dispose of this step: close files, empty logs, etc.
Object[]	getRowData(int filenr) Get a row of data from the indicated rowset or buffer (memory/disk)
void	initialize()
boolean	processRow(StepMetaInterface smi, StepDataInterface sdi) Perform the equivalent of processing one row.

Methods inherited from class org.pentaho.di.trans.step.BaseStep

addResultFile, addRowListener, addStepListener, buildLog, canProcessOneRow, cleanup, closeQuietly, copyVariablesFrom, decrementLinesRead, decrementLinesWritten, dispatch, environmentSubstitute, environmentSubstitute, findInputRowSet, findInputRowSet, findOutputRowSet, findOutputRowSet, getBooleanValueOfVariable, getClusterSize, getContainerObjectId, getCopy, getDispatcher, getErrorRowMeta, getErrors, getFilename, getInputRowMeta, getInputRowSets, getLinesInput, getLinesOutput, getLinesRead, getLinesRejected, getLinesSkipped, getLinesUpdated, getLinesWritten, getLogChannel, getLogChannelId, getLogFields, getLogLevel, getNextClassNr, getObjectCopy, getObjectId, getObjectName, getObjectRevision, getObjectType, getOutputRowSets, getParent, getParentVariableSpace, getPartitionID, getPartitionTargets, getPreviewRowMeta, getProcessed, getRegistrationDate, getRemoteInputSteps, getRemoteOutputSteps, getRepartitioning, getRepositoryDirectory, getResultFiles, getRow, getRowFrom, getRowListeners, getRuntime, getServerSockets, getSlaveNr, getSocketRepository, getStatus, getStatusDescription, getStepDataInterface, getStepID, getStepListeners, getStepMeta, getStepMetaInterface, getStepname, getTrans, getTransMeta, getTypeId, getUniqueStepCountAcrossSlaves, getUniqueStepNrAcrossSlaves, getVariable, getVariable, identifyErrorOutput, incrementLinesInput, incrementLinesOutput, incrementLinesRead, incrementLinesRejected, incrementLinesSkipped, incrementLinesUpdated, incrementLinesWritten, init, initBeforeStart, initializeVariablesFrom, injectVariables, isBasic, isDebug, isDetailed, isDistributed, isInitialising, isMapping, isPartitioned, isPaused, isRowLevel, isRunning, isStopped, isUsingThreadPriorityManagment, listVariables, logBasic, logBasic, logDebug, logDebug, logDetailed, logDetailed, logError, logError, logError, logMinimal, logMinimal, logRowlevel, logRowlevel, logSummary, markStart, markStop, outputIsDone, pauseRunning, putError, putRow, putRowTo, removeRowListener, resumeRunning, rowsetInputSize, rowsetOutputSize, safeModeChecking, setCarteObjectId, setCopy, setDistributed, setErrorRowMeta, setErrors, setInputRowMeta, setInputRowSets, setInternalVariables, setLinesInput, setLinesOutput, setLinesRead, setLinesRejected, setLinesSkipped, setLinesUpdated, setLinesWritten, setLogLevel, setOutputDone, setOutputRowSets, setParentVariableSpace, setPartitioned, setPartitionID, setPartitionTargets, setPaused, setPaused, setPreviewRowMeta, setRepartitioning, setRunning, setServerSockets, setSocketRepository, setStepDataInterface, setStepListeners, setStepMeta, setStepMetaInterface, setStepname, setStopped, setTransMeta, setUsingThreadPriorityManagment, setVariable, shareVariablesWith, stopAll, stopRunning, stopRunning, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.pentaho.di.trans.step.StepInterface

addRowListener, addStepListener, canProcessOneRow, cleanup, getCopy, getErrors, getInputRowSets, getLinesInput, getLinesOutput, getLinesRead, getLinesRejected, getLinesUpdated, getLinesWritten, getLogChannel, getOutputRowSets, getPartitionID, getProcessed, getResultFiles, getRow, getRowListeners, getRuntime, getStatus, getStepID, getStepMeta, getStepname, getTrans, identifyErrorOutput, init, initBeforeStart, isMapping, isPartitioned, isPaused, isRunning, isStopped, isUsingThreadPriorityManagment, markStart, markStop, pauseRunning, putRow, removeRowListener, resumeRunning, rowsetInputSize, rowsetOutputSize, setErrors, setLinesRejected, setOutputDone, setPartitioned, setPartitionID, setRepartitioning, setRunning, setStopped, setUsingThreadPriorityManagment, stopAll, stopRunning

Methods inherited from interface org.pentaho.di.core.variables.VariableSpace

copyVariablesFrom, environmentSubstitute, environmentSubstitute, getBooleanValueOfVariable, getParentVariableSpace, getVariable, getVariable, initializeVariablesFrom, injectVariables, listVariables, setParentVariableSpace, setVariable, shareVariablesWith

Constructor Detail

JoinRows

public JoinRows(StepMeta stepMeta,
                StepDataInterface stepDataInterface,
                int copyNr,
                TransMeta transMeta,
                Trans trans)

Method Detail

initialize

public void initialize()
                throws KettleException

Throws:

KettleException

getRowData

public Object[] getRowData(int filenr)
                    throws KettleException

Get a row of data from the indicated rowset or buffer (memory/disk)

Parameters:

filenr - The rowset or buffer to read a row from

Returns:

a row of data

Throws:

KettleException - in case something goes wrong

processRow

public boolean processRow(StepMetaInterface smi,
                          StepDataInterface sdi)
                   throws KettleException

Description copied from interface: StepInterface

Perform the equivalent of processing one row. Typically this means reading a row from input (getRow()) and passing a row to output (putRow)).

Specified by:

processRow in interface StepInterface

Overrides:

processRow in class BaseStep

Parameters:

smi - The steps metadata to work with

sdi - The steps temporary working data to work with (database connections, result sets, caches, temporary variables, etc.)

Returns:

false if no more rows can be processed or an error occurred.

Throws:

KettleException

dispose

public void dispose(StepMetaInterface smi,
                    StepDataInterface sdi)

Description copied from interface: StepInterface

Dispose of this step: close files, empty logs, etc.

Specified by:

dispose in interface StepInterface

Overrides:

dispose in class BaseStep

Parameters:

smi - The metadata to work with

sdi - The data to dispose of

batchComplete

public void batchComplete()
                   throws KettleException

Description copied from interface: StepInterface

Calling this method will alert the step that we finished passing a batch of records to the step. Specifically for steps like "Sort Rows" it means that the buffered rows can be sorted and passed on.

Specified by:

batchComplete in interface StepInterface

Overrides:

batchComplete in class BaseStep

Throws:

KettleException - In case an error occurs during the processing of the batch of rows.