org.pentaho.di.trans.steps.reservoirsampling

类 ReservoirSamplingMeta

java.lang.Object

org.pentaho.di.trans.step.BaseStepMeta

org.pentaho.di.trans.steps.reservoirsampling.ReservoirSamplingMeta

所有已实现的接口:

Cloneable, StepAttributesInterface, StepMetaInterface

public class ReservoirSamplingMeta
extends BaseStepMeta
implements StepMetaInterface

Contains the meta data for the ReservoirSampling step.

版本:

1.0

作者:

Mark Hall (mhall{[at]}pentaho.org)

字段概要

字段

限定符和类型	字段和说明
protected String	m_randomSeed
protected String	m_sampleSize
static String	XML_TAG

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

attributes, databases, log, loggingObject, parentStepMeta, repository, STEP_ATTRIBUTES_FILE

构造器概要

构造器

构造器和说明
ReservoirSamplingMeta() Creates a new ReservoirMeta instance.

方法概要

限定符和类型	方法和说明
void	check(List<org.pentaho.di.core.CheckResultInterface> remarks, TransMeta transmeta, StepMeta stepMeta, org.pentaho.di.core.row.RowMetaInterface prev, String[] input, String[] output, org.pentaho.di.core.row.RowMetaInterface info, org.pentaho.di.core.variables.VariableSpace space, Repository repository, org.pentaho.metastore.api.IMetaStore metaStore) Checks the settings of this step and puts the findings in a remarks List.
Object	clone() Clone this step's meta data
boolean	equals(Object obj) Check for equality
void	getFields(org.pentaho.di.core.row.RowMetaInterface row, String origin, org.pentaho.di.core.row.RowMetaInterface[] info, StepMeta nextStep, org.pentaho.di.core.variables.VariableSpace space, Repository repository, org.pentaho.metastore.api.IMetaStore metaStore) Gets the fields.
String	getSampleSize() Get the sample size to generate.
String	getSeed() Get the random seed
StepInterface	getStep(StepMeta stepMeta, StepDataInterface stepDataInterface, int cnr, TransMeta tr, Trans trans) Get the executing step, needed by Trans to launch a step.
StepDataInterface	getStepData() Get a new instance of the appropriate data class.
String	getXML() Return the XML describing this (configured) step
int	hashCode()
void	loadXML(Node stepnode, List<org.pentaho.di.core.database.DatabaseMeta> databases, org.pentaho.metastore.api.IMetaStore metaStore) Loads the meta data for this (configured) step from XML.
void	readRep(Repository rep, org.pentaho.metastore.api.IMetaStore metaStore, org.pentaho.di.repository.ObjectId id_step, List<org.pentaho.di.core.database.DatabaseMeta> databases) Read this step's configuration from a repository
void	saveRep(Repository rep, org.pentaho.metastore.api.IMetaStore metaStore, org.pentaho.di.repository.ObjectId id_transformation, org.pentaho.di.repository.ObjectId id_step) Save this step's meta data to a repository
void	setDefault() Set the defaults for this step.
void	setSampleSize(String sampleS) Set the size of the sample to generate
void	setSeed(String seed) Set the seed value for the random number generator

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

analyseImpact, analyseImpact, cancelQueries, check, check, createEntry, excludeFromCopyDistributeVerification, excludeFromRowLayoutVerification, exportResources, exportResources, extractStepMetadataEntries, findAttribute, findParent, findParentEntry, getActiveReferencedObjectDescription, getDescription, getDialogClassName, getFields, getLog, getLogChannelId, getName, getObjectCopy, getObjectId, getObjectRevision, getObjectType, getOptionalStreams, getParent, getParentStepMeta, getReferencedObjectDescriptions, getRepCode, getRepositoryDirectory, getRequiredFields, getRequiredFields, getResourceDependencies, getSQLStatements, getSQLStatements, getStepInjectionMetadataEntries, getStepIOMeta, getStepIOMeta, getStepMetaInjectionInterface, getSupportedTransformationTypes, getTableFields, getTooltip, getUsedArguments, getUsedDatabaseConnections, getUsedLibraries, getXmlCode, handleStreamSelection, hasChanged, hasRepositoryReferences, isBasic, isDebug, isDetailed, isReferencedObjectEnabled, isRowLevel, loadReferencedObject, loadReferencedObject, loadStepAttributes, loadXML, loadXML, logBasic, logBasic, logDebug, logDebug, logDetailed, logDetailed, logError, logError, logError, logMinimal, logMinimal, logRowlevel, logRowlevel, lookupRepositoryReferences, readRep, readRep, resetStepIoMeta, saveRep, searchInfoAndTargetSteps, setChanged, setChanged, setParentStepMeta, setStepIOMeta, supportsErrorHandling

从类继承的方法 java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

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

analyseImpact, analyseImpact, cancelQueries, check, cleanAfterHopFromRemove, cleanAfterHopFromRemove, cleanAfterHopToRemove, excludeFromCopyDistributeVerification, excludeFromRowLayoutVerification, exportResources, exportResources, extractStepMetadataEntries, fetchTransMeta, getActiveReferencedObjectDescription, getDialogClassName, getFields, getOptionalStreams, getParentStepMeta, getReferencedObjectDescriptions, getRequiredFields, getResourceDependencies, getSQLStatements, getSQLStatements, getStepIOMeta, getStepMetaInjectionInterface, getSupportedTransformationTypes, getTableFields, getUsedArguments, getUsedDatabaseConnections, getUsedLibraries, handleStreamSelection, hasChanged, hasRepositoryReferences, isReferencedObjectEnabled, loadReferencedObject, loadXML, lookupRepositoryReferences, passDataToServletOutput, readRep, resetStepIoMeta, saveRep, searchInfoAndTargetSteps, setChanged, setParentStepMeta, supportsErrorHandling

字段详细资料

XML_TAG

public static final String XML_TAG

另请参阅:

常量字段值

m_sampleSize

protected String m_sampleSize

m_randomSeed

protected String m_randomSeed

构造器详细资料

ReservoirSamplingMeta

public ReservoirSamplingMeta()

Creates a new ReservoirMeta instance.

方法详细资料

getSampleSize

public String getSampleSize()

Get the sample size to generate.

返回:

the sample size

setSampleSize

public void setSampleSize(String sampleS)

Set the size of the sample to generate

参数:

sampleS - the size of the sample

getSeed

public String getSeed()

Get the random seed

返回:

the random seed

setSeed

public void setSeed(String seed)

Set the seed value for the random number generator

参数:

seed - the seed value

getXML

public String getXML()

Return the XML describing this (configured) step

指定者:

getXML 在接口中 StepMetaInterface

覆盖:

getXML 在类中 BaseStepMeta

返回:

a String containing the XML

equals

public boolean equals(Object obj)

Check for equality

覆盖:

equals 在类中 Object

参数:

obj - an Object to compare with

返回:

true if equal to the supplied object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

setDefault

public void setDefault()

Set the defaults for this step.

指定者:

setDefault 在接口中 StepMetaInterface

clone

public Object clone()

Clone this step's meta data

指定者:

clone 在接口中 StepMetaInterface

覆盖:

clone 在类中 BaseStepMeta

返回:

the cloned meta data

loadXML

public void loadXML(Node stepnode,
                    List<org.pentaho.di.core.database.DatabaseMeta> databases,
                    org.pentaho.metastore.api.IMetaStore metaStore)
             throws org.pentaho.di.core.exception.KettleXMLException

Loads the meta data for this (configured) step from XML.

指定者:

loadXML 在接口中 StepMetaInterface

覆盖:

loadXML 在类中 BaseStepMeta

参数:

stepnode - the step to load

databases - The available list of databases to reference to

metaStore - the metastore to optionally load external reference metadata from

抛出:

org.pentaho.di.core.exception.KettleXMLException - if an error occurs

readRep

public void readRep(Repository rep,
                    org.pentaho.metastore.api.IMetaStore metaStore,
                    org.pentaho.di.repository.ObjectId id_step,
                    List<org.pentaho.di.core.database.DatabaseMeta> databases)
             throws org.pentaho.di.core.exception.KettleException

Read this step's configuration from a repository

指定者:

readRep 在接口中 StepMetaInterface

覆盖:

readRep 在类中 BaseStepMeta

参数:

rep - the repository to access

metaStore - the MetaStore to read from

id_step - the id for this step

databases - The databases to reference

抛出:

org.pentaho.di.core.exception.KettleException - if an error occurs

saveRep

public void saveRep(Repository rep,
                    org.pentaho.metastore.api.IMetaStore metaStore,
                    org.pentaho.di.repository.ObjectId id_transformation,
                    org.pentaho.di.repository.ObjectId id_step)
             throws org.pentaho.di.core.exception.KettleException

Save this step's meta data to a repository

指定者:

saveRep 在接口中 StepMetaInterface

覆盖:

saveRep 在类中 BaseStepMeta

参数:

rep - the repository to save to

id_transformation - transformation id

id_step - step id

metaStore - the metaStore to optionally write to

抛出:

org.pentaho.di.core.exception.KettleException - if an error occurs

getFields

public void getFields(org.pentaho.di.core.row.RowMetaInterface row,
                      String origin,
                      org.pentaho.di.core.row.RowMetaInterface[] info,
                      StepMeta nextStep,
                      org.pentaho.di.core.variables.VariableSpace space,
                      Repository repository,
                      org.pentaho.metastore.api.IMetaStore metaStore)
               throws org.pentaho.di.core.exception.KettleStepException

从类复制的说明: BaseStepMeta

Gets the fields.

指定者:

getFields 在接口中 StepMetaInterface

覆盖:

getFields 在类中 BaseStepMeta

参数:

row - the input row meta that is modified in this method to reflect the output row metadata of the step

origin - Name of the step to use as input for the origin field in the values

info - Fields used as extra lookup information

nextStep - the next step that is targeted

space - the space The variable space to use to replace variables

repository - the repository to use to load Kettle metadata objects impacting the output fields

metaStore - the MetaStore to use to load additional external data or metadata impacting the output fields

抛出:

org.pentaho.di.core.exception.KettleStepException - the kettle step exception

check

public void check(List<org.pentaho.di.core.CheckResultInterface> remarks,
                  TransMeta transmeta,
                  StepMeta stepMeta,
                  org.pentaho.di.core.row.RowMetaInterface prev,
                  String[] input,
                  String[] output,
                  org.pentaho.di.core.row.RowMetaInterface info,
                  org.pentaho.di.core.variables.VariableSpace space,
                  Repository repository,
                  org.pentaho.metastore.api.IMetaStore metaStore)

从接口复制的说明: StepMetaInterface

Checks the settings of this step and puts the findings in a remarks List.

指定者:

check 在接口中 StepMetaInterface

覆盖:

check 在类中 BaseStepMeta

参数:

remarks - The list to put the remarks in @see org.pentaho.di.core.CheckResult

stepMeta - The stepMeta to help checking

prev - The fields coming from the previous step

input - The input step names

output - The output step names

info - The fields that are used as information by the step

space - the variable space to resolve variable expressions with

repository - the repository to use to load Kettle metadata objects impacting the output fields

metaStore - the MetaStore to use to load additional external data or metadata impacting the output fields

getStep

public StepInterface getStep(StepMeta stepMeta,
                             StepDataInterface stepDataInterface,
                             int cnr,
                             TransMeta tr,
                             Trans trans)

Get the executing step, needed by Trans to launch a step.

指定者:

getStep 在接口中 StepMetaInterface

参数:

stepMeta - the step info

stepDataInterface - the step data interface linked to this step. Here the step can store temporary data, database connections, etc.

cnr - the copy number to get.

tr - the transformation info.

trans - the launching transformation

返回:

a StepInterface value

getStepData

public StepDataInterface getStepData()

Get a new instance of the appropriate data class. This data class implements the StepDataInterface. It basically contains the persisting data that needs to live on, even if a worker thread is terminated.

指定者:

getStepData 在接口中 StepMetaInterface

返回:

a StepDataInterface value