org.pentaho.di.trans.steps.mapping

类 Mapping

java.lang.Object

org.pentaho.di.trans.step.BaseStep

org.pentaho.di.trans.steps.mapping.Mapping

所有已实现的接口:

org.pentaho.di.core.ExtensionDataInterface, HasLogChannelInterface, org.pentaho.di.core.logging.LoggingObjectInterface, org.pentaho.di.core.variables.VariableSpace, StepInterface

public class Mapping
extends BaseStep
implements StepInterface

Execute a mapping: a re-usuable transformation

从以下版本开始:

22-nov-2005

作者:

Matt

字段概要

从类继承的字段 org.pentaho.di.trans.step.BaseStep

deadLockCounter, extensionDataMap, first, linesInput, linesOutput, linesRead, linesRejected, linesSkipped, linesUpdated, linesWritten, log, metaStore, repository, rowListeners, safeStopped, terminator, terminator_rows, variables

构造器概要

构造器

构造器和说明
Mapping(StepMeta stepMeta, StepDataInterface stepDataInterface, int copyNr, TransMeta transMeta, Trans trans)

方法概要

限定符和类型	方法和说明
static void	addInputRenames(List<MappingValueRename> renameList, List<MappingValueRename> addRenameList)
void	addRowListener(RowListener rowListener) For preview of the main data path, make sure we pass the row listener down to the Mapping Output step...
void	dispose(StepMetaInterface smi, StepDataInterface sdi) Dispose of this step: close files, empty logs, etc.
long	getLinesInput()
long	getLinesOutput()
long	getLinesRead()
long	getLinesRejected()
long	getLinesUpdated()
long	getLinesWritten()
Trans	getMappingTrans()
boolean	init(StepMetaInterface smi, StepDataInterface sdi) Initialize and do work where other steps need to wait for...
void	prepareMappingExecution()
boolean	processRow(StepMetaInterface smi, StepDataInterface sdi) Process a single row.
int	rowsetInputSize()
int	rowsetOutputSize()
void	stopAll() Flags all rowsets as stopped/completed/finished.
void	stopRunning(StepMetaInterface stepMetaInterface, StepDataInterface stepDataInterface) Perform actions to stop a running step.

从类继承的方法 org.pentaho.di.trans.step.BaseStep

addResultFile, addRowSetToInputRowSets, addRowSetToOutputRowSets, addStepListener, batchComplete, buildLog, canProcessOneRow, checkFeedback, cleanup, clearInputRowSets, clearOutputRowSets, closeQuietly, copyVariablesFrom, decrementLinesRead, decrementLinesWritten, dispatch, environmentSubstitute, environmentSubstitute, fieldSubstitute, findInputRowSet, findInputRowSet, findOutputRowSet, findOutputRowSet, getBooleanValueOfVariable, getClusterSize, getContainerObjectId, getCopy, getCurrentInputRowSetNr, getCurrentOutputRowSetNr, getDispatcher, getErrorRowMeta, getErrors, getExtensionDataMap, getFilename, getFirstInputRowSet, getInputRowMeta, getInputRowSets, getLinesSkipped, getLogChannel, getLogChannelId, getLogFields, getLogLevel, getMetaStore, getNextClassNr, getObjectCopy, getObjectId, getObjectName, getObjectRevision, getObjectType, getOutputRowSets, getParent, getParentVariableSpace, getPartitionID, getPartitionTargets, getPreviewRowMeta, getProcessed, getRegistrationDate, getRemoteInputSteps, getRemoteOutputSteps, getRepartitioning, getRepository, getRepositoryDirectory, getResultFiles, getRow, getRowFrom, getRowHandler, getRowListeners, getRuntime, getServerSockets, getSlaveNr, getSocketRepository, getStatus, getStatusDescription, getStepDataInterface, getStepID, getStepListeners, getStepMeta, getStepMetaInterface, getStepname, getTrans, getTransMeta, getTypeId, getUniqueStepCountAcrossSlaves, getUniqueStepNrAcrossSlaves, getVariable, getVariable, handleGetRowFrom, handlePutRowTo, identifyErrorOutput, incrementLinesInput, incrementLinesOutput, incrementLinesRead, incrementLinesRejected, incrementLinesSkipped, incrementLinesUpdated, incrementLinesWritten, initBeforeStart, initializeVariablesFrom, injectVariables, isBasic, isDebug, isDetailed, isDistributed, isForcingSeparateLogging, isGatheringMetrics, isInitialising, isMapping, isPartitioned, isPaused, isRowLevel, isRunning, isSafeStopped, isStopped, isUsingThreadPriorityManagment, listVariables, logBasic, logBasic, logDebug, logDebug, logDetailed, logDetailed, logError, logError, logError, logMinimal, logMinimal, logRowlevel, logRowlevel, logSummary, markStart, markStop, openRemoteInputStepSocketsOnce, openRemoteOutputStepSocketsOnce, outputIsDone, pauseRunning, putError, putRow, putRowTo, removeRowListener, resumeRunning, safeModeChecking, safeModeChecking, setCarteObjectId, setCopy, setCurrentInputRowSetNr, setCurrentOutputRowSetNr, setDistributed, setErrorRowMeta, setErrors, setForcingSeparateLogging, setGatheringMetrics, setInputRowMeta, setInputRowSets, setInternalVariables, setLinesInput, setLinesOutput, setLinesRead, setLinesRejected, setLinesSkipped, setLinesUpdated, setLinesWritten, setLogLevel, setMetaStore, setOutputDone, setOutputRowSets, setParentVariableSpace, setPartitioned, setPartitionID, setPartitionTargets, setPaused, setPaused, setPreviewRowMeta, setRepartitioning, setRepository, setRowHandler, setRunning, setSafeStopped, setServerSockets, setSocketRepository, setStepDataInterface, setStepListeners, setStepMeta, setStepMetaInterface, setStepname, setStopped, setTransMeta, setUsingThreadPriorityManagment, setVariable, shareVariablesWith, stopRunning, swapFirstInputRowSetIfExists, toString, verifyInputDeadLock, waitUntilTransformationIsStarted

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.pentaho.di.trans.step.StepInterface

addRowSetToInputRowSets, addRowSetToOutputRowSets, addStepListener, batchComplete, canProcessOneRow, cleanup, getCopy, getCurrentInputRowSetNr, getCurrentOutputRowSetNr, getErrors, getInputRowSets, getLogChannel, getMetaStore, getOutputRowSets, getPartitionID, getProcessed, getRepository, getResultFiles, getRow, getRowListeners, getRuntime, getStatus, getStepID, getStepMeta, getStepname, getTrans, identifyErrorOutput, initBeforeStart, isMapping, isPartitioned, isPaused, isRunning, isSafeStopped, isStopped, isUsingThreadPriorityManagment, markStart, markStop, pauseRunning, putRow, removeRowListener, resumeRunning, setCurrentInputRowSetNr, setCurrentOutputRowSetNr, setErrors, setLinesRejected, setMetaStore, setOutputDone, setPartitioned, setPartitionID, setRepartitioning, setRepository, setRunning, setSafeStopped, setStopped, setUsingThreadPriorityManagment, subStatuses

从接口继承的方法 org.pentaho.di.core.variables.VariableSpace

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

构造器详细资料

Mapping

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

方法详细资料

processRow

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

Process a single row. In our case, we send one row of data to a piece of transformation. In the transformation, we look up the MappingInput step to send our rows to it. As a consequence, for the time being, there can only be one MappingInput and one MappingOutput step in the Mapping.

指定者:

processRow 在接口中 StepInterface

覆盖:

processRow 在类中 BaseStep

参数:

smi - The steps metadata to work with

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

返回:

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

抛出:

org.pentaho.di.core.exception.KettleException

prepareMappingExecution

public void prepareMappingExecution()
                             throws org.pentaho.di.core.exception.KettleException

抛出:

org.pentaho.di.core.exception.KettleException

addInputRenames

public static void addInputRenames(List<MappingValueRename> renameList,
                                   List<MappingValueRename> addRenameList)

init

public boolean init(StepMetaInterface smi,
                    StepDataInterface sdi)

从接口复制的说明: StepInterface

Initialize and do work where other steps need to wait for...

指定者:

init 在接口中 StepInterface

覆盖:

init 在类中 BaseStep

参数:

smi - The metadata to work with

sdi - The data to initialize

dispose

public void dispose(StepMetaInterface smi,
                    StepDataInterface sdi)

从接口复制的说明: StepInterface

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

指定者:

dispose 在接口中 StepInterface

覆盖:

dispose 在类中 BaseStep

参数:

smi - The metadata to work with

sdi - The data to dispose of

stopRunning

public void stopRunning(StepMetaInterface stepMetaInterface,
                        StepDataInterface stepDataInterface)
                 throws org.pentaho.di.core.exception.KettleException

从类复制的说明: BaseStep

Perform actions to stop a running step. This can be stopping running SQL queries (cancel), etc. Default it doesn't do anything.

指定者:

stopRunning 在接口中 StepInterface

覆盖:

stopRunning 在类中 BaseStep

参数:

stepMetaInterface - The metadata that might be needed by the step to stop running.

stepDataInterface - The interface to the step data containing the connections, resultsets, open files, etc.

抛出:

org.pentaho.di.core.exception.KettleException - in case something goes wrong

stopAll

public void stopAll()

从接口复制的说明: StepInterface

Flags all rowsets as stopped/completed/finished.

指定者:

stopAll 在接口中 StepInterface

覆盖:

stopAll 在类中 BaseStep

getLinesInput

public long getLinesInput()

指定者:

getLinesInput 在接口中 StepInterface

覆盖:

getLinesInput 在类中 BaseStep

返回:

Returns the number of lines read from an input source: database, file, socket, etc.

getLinesOutput

public long getLinesOutput()

指定者:

getLinesOutput 在接口中 StepInterface

覆盖:

getLinesOutput 在类中 BaseStep

返回:

Returns the number of lines written to an output target: database, file, socket, etc.

getLinesRead

public long getLinesRead()

指定者:

getLinesRead 在接口中 StepInterface

覆盖:

getLinesRead 在类中 BaseStep

返回:

Returns the number of lines read from previous steps

getLinesRejected

public long getLinesRejected()

指定者:

getLinesRejected 在接口中 StepInterface

覆盖:

getLinesRejected 在类中 BaseStep

返回:

the number of lines rejected to an error handling step

getLinesUpdated

public long getLinesUpdated()

指定者:

getLinesUpdated 在接口中 StepInterface

覆盖:

getLinesUpdated 在类中 BaseStep

返回:

Returns the number of lines updated in an output target: database, file, socket, etc.

getLinesWritten

public long getLinesWritten()

指定者:

getLinesWritten 在接口中 StepInterface

覆盖:

getLinesWritten 在类中 BaseStep

返回:

Returns the linesWritten.

rowsetInputSize

public int rowsetInputSize()

指定者:

rowsetInputSize 在接口中 StepInterface

覆盖:

rowsetInputSize 在类中 BaseStep

返回:

The total amount of rows in the input buffers

rowsetOutputSize

public int rowsetOutputSize()

指定者:

rowsetOutputSize 在接口中 StepInterface

覆盖:

rowsetOutputSize 在类中 BaseStep

返回:

The total amount of rows in the output buffers

getMappingTrans

public Trans getMappingTrans()

addRowListener

public void addRowListener(RowListener rowListener)

For preview of the main data path, make sure we pass the row listener down to the Mapping Output step...

指定者:

addRowListener 在接口中 StepInterface

覆盖:

addRowListener 在类中 BaseStep

参数:

rowListener - the rowlistener to add