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

java.lang.Object
  extended by org.pentaho.di.trans.step.BaseStep
      extended by 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.