uk.ac.ed.epcc.safe.accounting.selector

Interface PropertyTargetGenerator<UR extends PropertyTarget>

Type Parameters:

UR - property target type

All Superinterfaces:

PropertyTargetFactory

All Known Subinterfaces:

AllocationManager<K,T>, ChargedAllocationManager<K,T>, ExpressionTargetFactory<T>, ExpressionTargetGenerator<T>, UsageProducer<UR>

All Known Implementing Classes:

AccountingClassificationFactory, AccountingLinkManager, AggregateUsageRecordFactory, AllocationFactory, CertificatePersonFactory, ChargedAllocationFactory, ConfigUsageManager, ConfigUsageRecordFactory, DailyAggregateUsageRecordFactory, DataObjectPropertyFactory, DefaultDataObjectPropertyFactory, DefaultUsageProducer, HourlyAggregateUsageRecordFactory, ParseAccountingClassificationFactory, ParseUsageRecordFactory, PasswordPersonFactory, PersonFactory, PropertyTargetClassificationFactory, PropertyTargetHistoryFactory, PropertyTargetLinkHistoryFactory, SequenceAllocationFactory, UsageManager, UsageRecordFactory, UsageRecordUsageManager

public interface PropertyTargetGenerator<UR extends PropertyTarget>
extends PropertyTargetFactory

A PropertyTargetFactory that can also retrieve records using a RecordSelector

Author:

spb

Method Summary

Methods

Modifier and Type	Method and Description
boolean	compatible(RecordSelector sel) Is the RecordSelector compatible with this class.
java.util.Iterator<UR>	getIterator(RecordSelector sel) Get an Iterator over selected records.
java.util.Iterator<UR>	getIterator(RecordSelector sel, int skip, int count) Get an Iterator over selected records.
long	getRecordCount(RecordSelector selector) get the number of records matching the selector
<PT> java.util.Set<PT>	getValues(PropertyTag<PT> data_tag, RecordSelector selector) Gets the distinct property values for the set of records identified by the RecordSelector

Methods inherited from interface uk.ac.ed.epcc.safe.accounting.properties.PropertyTargetFactory

getFinder, hasProperty

Method Detail

compatible

boolean compatible(RecordSelector sel)

Is the RecordSelector compatible with this class. This method will return false if it the selector is fundamentally incompatible with the properties supported by the class and no records can match the selector. It does NOT check if any matching records exist.

Parameters:

sel -

Returns:

boolean

getIterator

java.util.Iterator<UR> getIterator(RecordSelector sel,
                                 int skip,
                                 int count)
                                                          throws java.lang.Exception

Get an Iterator over selected records.

Throws:

java.lang.Exception

Parameters:

sel - RecordSelector to select data

skip - Number of initial records in sequence to skip

count - MAximum number of records to return

Returns:

Iterator over selected records

getIterator

java.util.Iterator<UR> getIterator(RecordSelector sel)
                                                          throws java.lang.Exception

Get an Iterator over selected records.

Throws:

java.lang.Exception

Parameters:

sel - RecordSelector to select data

Returns:

Iterator over selected records

getRecordCount

long getRecordCount(RecordSelector selector)
                    throws java.lang.Exception

get the number of records matching the selector

Throws:

java.lang.Exception

Parameters:

selector -

Returns:

number o matches

getValues

<PT> java.util.Set<PT> getValues(PropertyTag<PT> data_tag,
                               RecordSelector selector)
                            throws java.lang.Exception

Gets the distinct property values for the set of records identified by the RecordSelector

Throws:

java.lang.Exception

Type Parameters:

PT -

Parameters:

data_tag - the data_tag

selector - the selector

Returns:

Set of property values