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## org.pentaho.di.trans.steps.ifnull
Class IfNull

    java.lang.Object
      java.lang.Thread
          org.pentaho.di.trans.step.BaseStep
              org.pentaho.di.trans.steps.ifnull.IfNull

All Implemented Interfaces:
  Runnable, org.pentaho.di.core.variables.VariableSpace, StepInterface

    public class IfNull

extends BaseStep
implements StepInterface

Sets a field value to a constant if it is null

Since:
  30-06-2008
Author:
  Samatar

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread
`Thread.State, Thread.UncaughtExceptionHandler`

Field Summary

Fields inherited from class org.pentaho.di.trans.step.BaseStep
`category_order, errorRowSet, first, init, inputRowSets, linesInput, linesOutput, linesRead, linesRejected, linesSkipped, linesUpdated, linesWritten, outputRowSets, paused, remoteInputSteps, remoteOutputSteps, statusDesc, steps, stopped, terminator, terminator_rows, thr, waiting`

Fields inherited from class java.lang.Thread
`MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY`

Constructor Summary
`IfNull(StepMeta stepMeta, StepDataInterface stepDataInterface, int copyNr, TransMeta transMeta, Trans trans)`

Method Summary
`boolean` | `init(StepMetaInterface smi, StepDataInterface sdi)` Initialise and do work where other steps need to wait for...
`boolean` | `processRow(StepMetaInterface smi, StepDataInterface sdi)` Process one row.
`void` | `replaceNull(Object[] row, int i)`
`void` | `run()` Run is where the action happens in a step...

Methods inherited from class org.pentaho.di.trans.step.BaseStep
`addResultFile, addRowListener, addStepListener, buildLog, cleanup, copyVariablesFrom, decrementLinesRead, decrementLinesWritten, dispatch, dispose, environmentSubstitute, environmentSubstitute, findInputRowSet, findInputRowSet, findOutputRowSet, findOutputRowSet, getBooleanValueOfVariable, getClusterSize, getCopy, getDispatcher, getErrorRowMeta, getErrors, getIconFilename, getInputRowMeta, getInputRowSets, getLinesInput, getLinesOutput, getLinesRead, getLinesRejected, getLinesSkipped, getLinesUpdated, getLinesWritten, getLogFields, getNextClassNr, getOutputRowSets, getParentVariableSpace, getPartitionID, getPartitionTargets, getPreviewRowMeta, getProcessed, getRepartitioning, getResultFiles, getRow, getRowFrom, getRowListeners, getRuntime, getServerSockets, getSlaveNr, getSocketRepository, getStatus, getStatusDescription, getStepDataInterface, getStepID, getStepInfo, getStepListeners, getStepMeta, getStepMetaInterface, getStepname, getThread, getTrans, getTransMeta, getTypeId, getUniqueStepCountAcrossSlaves, getUniqueStepNrAcrossSlaves, getVariable, getVariable, incrementLinesInput, incrementLinesOutput, incrementLinesRead, incrementLinesRejected, incrementLinesSkipped, incrementLinesUpdated, incrementLinesWritten, initBeforeStart, initializeVariablesFrom, injectVariables, isDistributed, isInitialising, isMapping, isPartitioned, isPaused, isSafeModeEnabled, isStopped, isUsingThreadPriorityManagment, listVariables, logBasic, logDebug, logDetailed, logError, logError, logMinimal, logRowlevel, logSummary, markStart, markStop, outputIsDone, pauseRunning, putError, putRow, putRowTo, removeRowListener, resumeRunning, rowsetInputSize, rowsetOutputSize, runStepThread, safeModeChecking, setCopy, setDistributed, setErrorRowMeta, setErrors, setInputRowMeta, setInputRowSets, setInternalVariables, setLinesInput, setLinesOutput, setLinesRead, setLinesRejected, setLinesSkipped, setLinesUpdated, setLinesWritten, setOutputDone, setOutputRowSets, setParentVariableSpace, setPartitioned, setPartitionID, setPartitionTargets, setPaused, setPaused, setPreviewRowMeta, setRepartitioning, setSafeModeEnabled, setServerSockets, setSocketRepository, setStepDataInterface, setStepListeners, setStepMeta, setStepMetaInterface, setStepname, setStopped, setStopped, setTransMeta, setUsingThreadPriorityManagment, setVariable, shareVariablesWith, stopAll, stopRunning, stopRunning, toString`

Methods inherited from class java.lang.Thread
`activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, yield`

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, cleanup, dispose, getCopy, getErrors, getInputRowSets, getLinesInput, getLinesOutput, getLinesRead, getLinesRejected, getLinesUpdated, getLinesWritten, getOutputRowSets, getPartitionID, getRow, getRowListeners, getStepID, getStepMeta, getStepname, initBeforeStart, isAlive, isMapping, isPartitioned, isStopped, markStart, markStop, pauseRunning, putRow, removeRowListener, resumeRunning, setErrors, setLinesRejected, setOutputDone, setPartitionID, start, stopAll, stopRunning`

Constructor Detail

### IfNull

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

Method Detail

### processRow

    public boolean processRow(StepMetaInterface smi,
                              StepDataInterface sdi)
                       throws org.pentaho.di.core.exception.KettleException

  Description copied from interface: `StepInterface`
  Process one row.

  Specified by:
    `processRow` in interface `StepInterface`
  Overrides:
    `processRow` in class `BaseStep`
  Parameters:
    `smi` - The metadata to work with
    `sdi` - The temporary working data to work with (database connections, resultsets, caches, temporary variables, etc.)
  Returns:
    false if no more rows can be processed or an error occurred.
  Throws:
    `org.pentaho.di.core.exception.KettleException`

### replaceNull

    public void replaceNull(Object[] row,
                            int i)
                     throws Exception

  Throws:
    `Exception`

### init

    public boolean init(StepMetaInterface smi,
                        StepDataInterface sdi)

  Description copied from interface: `StepInterface`
  Initialise and do work where other steps need to wait for...

  Specified by:
    `init` in interface `StepInterface`
  Overrides:
    `init` in class `BaseStep`
  Parameters:
    `smi` - The metadata to work with
    `sdi` - The data to initialize

### run

    public void run()

  Description copied from interface: `StepInterface`
  Run is where the action happens in a step...

  Specified by:
    `run` in interface `Runnable`
  Specified by:
    `run` in interface `StepInterface`
  Overrides:
    `run` in class `Thread`

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