org.pentaho.di.trans.steps.memgroupby

Class MemoryGroupByMeta

java.lang.Object

org.pentaho.di.trans.step.BaseStepMeta

org.pentaho.di.trans.steps.memgroupby.MemoryGroupByMeta

All Implemented Interfaces:

Cloneable, StepAttributesInterface, StepMetaInterface

public class MemoryGroupByMeta
extends BaseStepMeta
implements StepMetaInterface

Created on 02-jun-2003

Field Summary

Fields

Modifier and Type	Field and Description
static int	TYPE_GROUP_AVERAGE
static int	TYPE_GROUP_CONCAT_COMMA
static int	TYPE_GROUP_CONCAT_STRING
static int	TYPE_GROUP_COUNT_ALL
static int	TYPE_GROUP_COUNT_ANY
static int	TYPE_GROUP_COUNT_DISTINCT
static int	TYPE_GROUP_FIRST
static int	TYPE_GROUP_FIRST_INCL_NULL
static int	TYPE_GROUP_LAST
static int	TYPE_GROUP_LAST_INCL_NULL
static int	TYPE_GROUP_MAX
static int	TYPE_GROUP_MEDIAN
static int	TYPE_GROUP_MIN
static int	TYPE_GROUP_NONE
static int	TYPE_GROUP_PERCENTILE
static int	TYPE_GROUP_STANDARD_DEVIATION
static int	TYPE_GROUP_SUM
static String[]	typeGroupCode
static String[]	typeGroupLongDesc

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

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

Constructor Summary

Constructors

Constructor and Description
MemoryGroupByMeta()

Method Summary

Modifier and Type	Method and Description
void	afterInjectionSynchronization() If we use injection we can have different arrays lengths.
void	allocate(int sizegroup, int nrfields)
void	check(List<CheckResultInterface> remarks, TransMeta transMeta, StepMeta stepMeta, RowMetaInterface prev, String[] input, String[] output, RowMetaInterface info, 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() Make an exact copy of this step, make sure to explicitly copy Collections etc.
String[]	getAggregateField()
int[]	getAggregateType()
void	getFields(RowMetaInterface r, String origin, RowMetaInterface[] info, StepMeta nextStep, VariableSpace space, Repository repository, org.pentaho.metastore.api.IMetaStore metaStore) Gets the fields.
String[]	getGroupField()
StepInterface	getStep(StepMeta stepMeta, StepDataInterface stepDataInterface, int cnr, TransMeta transMeta, 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[]	getSubjectField()
static int	getType(String desc)
static String	getTypeDesc(int i)
static String	getTypeDescLong(int i)
String[]	getValueField()
String	getXML() Produces the XML string that describes this step's information.
boolean	isAlwaysGivingBackOneRow()
void	loadXML(Node stepnode, List<DatabaseMeta> databases, org.pentaho.metastore.api.IMetaStore metaStore) Load the values for this step from an XML Node
void	readRep(Repository rep, org.pentaho.metastore.api.IMetaStore metaStore, ObjectId id_step, List<DatabaseMeta> databases) Read the steps information from a Kettle repository
void	saveRep(Repository rep, org.pentaho.metastore.api.IMetaStore metaStore, ObjectId id_transformation, ObjectId id_step) Save the steps data into a Kettle repository
void	setAggregateField(String[] aggregateField)
void	setAggregateType(int[] aggregateType)
void	setAlwaysGivingBackOneRow(boolean alwaysGivingBackOneRow)
void	setDefault() Set default values
void	setGroupField(String[] groupField)
void	setSubjectField(String[] subjectField)
void	setValueField(String[] valueField)

Methods inherited from class 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, 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, supportsErrorHandling

Methods inherited from class java.lang.Object

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

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

analyseImpact, analyseImpact, cancelQueries, check, cleanAfterHopFromRemove, excludeFromCopyDistributeVerification, excludeFromRowLayoutVerification, exportResources, exportResources, extractStepMetadataEntries, 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

Field Detail

TYPE_GROUP_NONE

public static final int TYPE_GROUP_NONE

See Also:

Constant Field Values

TYPE_GROUP_SUM

public static final int TYPE_GROUP_SUM

See Also:

Constant Field Values

TYPE_GROUP_AVERAGE

public static final int TYPE_GROUP_AVERAGE

See Also:

Constant Field Values

TYPE_GROUP_MEDIAN

public static final int TYPE_GROUP_MEDIAN

See Also:

Constant Field Values

TYPE_GROUP_PERCENTILE

public static final int TYPE_GROUP_PERCENTILE

See Also:

Constant Field Values

TYPE_GROUP_MIN

public static final int TYPE_GROUP_MIN

See Also:

Constant Field Values

TYPE_GROUP_MAX

public static final int TYPE_GROUP_MAX

See Also:

Constant Field Values

TYPE_GROUP_COUNT_ALL

public static final int TYPE_GROUP_COUNT_ALL

See Also:

Constant Field Values

TYPE_GROUP_CONCAT_COMMA

public static final int TYPE_GROUP_CONCAT_COMMA

See Also:

Constant Field Values

TYPE_GROUP_FIRST

public static final int TYPE_GROUP_FIRST

See Also:

Constant Field Values

TYPE_GROUP_LAST

public static final int TYPE_GROUP_LAST

See Also:

Constant Field Values

TYPE_GROUP_FIRST_INCL_NULL

public static final int TYPE_GROUP_FIRST_INCL_NULL

See Also:

Constant Field Values

TYPE_GROUP_LAST_INCL_NULL

public static final int TYPE_GROUP_LAST_INCL_NULL

See Also:

Constant Field Values

TYPE_GROUP_STANDARD_DEVIATION

public static final int TYPE_GROUP_STANDARD_DEVIATION

See Also:

Constant Field Values

TYPE_GROUP_CONCAT_STRING

public static final int TYPE_GROUP_CONCAT_STRING

See Also:

Constant Field Values

TYPE_GROUP_COUNT_DISTINCT

public static final int TYPE_GROUP_COUNT_DISTINCT

See Also:

Constant Field Values

TYPE_GROUP_COUNT_ANY

public static final int TYPE_GROUP_COUNT_ANY

See Also:

Constant Field Values

typeGroupCode

public static final String[] typeGroupCode

typeGroupLongDesc

public static final String[] typeGroupLongDesc

Constructor Detail

MemoryGroupByMeta

public MemoryGroupByMeta()

Method Detail

getAggregateField

public String[] getAggregateField()

Returns:

Returns the aggregateField.

setAggregateField

public void setAggregateField(String[] aggregateField)

Parameters:

aggregateField - The aggregateField to set.

getAggregateType

public int[] getAggregateType()

Returns:

Returns the aggregateType.

setAggregateType

public void setAggregateType(int[] aggregateType)

Parameters:

aggregateType - The aggregateType to set.

getGroupField

public String[] getGroupField()

Returns:

Returns the groupField.

setGroupField

public void setGroupField(String[] groupField)

Parameters:

groupField - The groupField to set.

getSubjectField

public String[] getSubjectField()

Returns:

Returns the subjectField.

setSubjectField

public void setSubjectField(String[] subjectField)

Parameters:

subjectField - The subjectField to set.

getValueField

public String[] getValueField()

Returns:

Returns the valueField.

setValueField

public void setValueField(String[] valueField)

Parameters:

valueField - The valueField to set.

loadXML

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

Description copied from interface: StepMetaInterface

Load the values for this step from an XML Node

Specified by:

loadXML in interface StepMetaInterface

Overrides:

loadXML in class BaseStepMeta

Parameters:

stepnode - the Node to get the info from

databases - The available list of databases to reference to

metaStore - the metastore to optionally load external reference metadata from

Throws:

KettleXMLException - When an unexpected XML error occurred. (malformed etc.)

allocate

public void allocate(int sizegroup,
                     int nrfields)

clone

public Object clone()

Description copied from interface: StepMetaInterface

Make an exact copy of this step, make sure to explicitly copy Collections etc.

Specified by:

clone in interface StepMetaInterface

Overrides:

clone in class BaseStepMeta

Returns:

an exact copy of this step

getType

public static final int getType(String desc)

getTypeDesc

public static final String getTypeDesc(int i)

getTypeDescLong

public static final String getTypeDescLong(int i)

setDefault

public void setDefault()

Description copied from interface: StepMetaInterface

Set default values

Specified by:

setDefault in interface StepMetaInterface

getFields

public void getFields(RowMetaInterface r,
                      String origin,
                      RowMetaInterface[] info,
                      StepMeta nextStep,
                      VariableSpace space,
                      Repository repository,
                      org.pentaho.metastore.api.IMetaStore metaStore)

Description copied from class: BaseStepMeta

Gets the fields.

Specified by:

getFields in interface StepMetaInterface

Overrides:

getFields in class BaseStepMeta

Parameters:

r - 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

getXML

public String getXML()

Description copied from class: BaseStepMeta

Produces the XML string that describes this step's information.

Specified by:

getXML in interface StepMetaInterface

Overrides:

getXML in class BaseStepMeta

Returns:

String containing the XML describing this step.

readRep

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

Description copied from interface: StepMetaInterface

Read the steps information from a Kettle repository

Specified by:

readRep in interface StepMetaInterface

Overrides:

readRep in class BaseStepMeta

Parameters:

rep - The repository to read from

metaStore - The MetaStore to read external information from

id_step - The step ID

databases - The databases to reference

Throws:

KettleException - When an unexpected error occurred (database, network, etc)

saveRep

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

Description copied from interface: StepMetaInterface

Save the steps data into a Kettle repository

Specified by:

saveRep in interface StepMetaInterface

Overrides:

saveRep in class BaseStepMeta

Parameters:

rep - The Kettle repository to save to

metaStore - the metaStore to optionally write to

id_transformation - The transformation ID

id_step - The step ID

Throws:

KettleException - When an unexpected error occurred (database, network, etc)

check

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

Description copied from interface: StepMetaInterface

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

Specified by:

check in interface StepMetaInterface

Overrides:

check in class BaseStepMeta

Parameters:

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 transMeta,
                             Trans trans)

Description copied from interface: StepMetaInterface

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

Specified by:

getStep in interface StepMetaInterface

Parameters:

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 nr to get

transMeta - The transformation info

trans - The launching transformation

getStepData

public StepDataInterface getStepData()

Description copied from interface: StepMetaInterface

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.

Specified by:

getStepData in interface StepMetaInterface

Returns:

The appropriate StepDataInterface class.

isAlwaysGivingBackOneRow

public boolean isAlwaysGivingBackOneRow()

Returns:

the alwaysGivingBackOneRow

setAlwaysGivingBackOneRow

public void setAlwaysGivingBackOneRow(boolean alwaysGivingBackOneRow)

Parameters:

alwaysGivingBackOneRow - the alwaysGivingBackOneRow to set

afterInjectionSynchronization

public void afterInjectionSynchronization()

If we use injection we can have different arrays lengths. We need synchronize them for consistency behavior with UI