org.gcube.accounting.analytics.persistence

Class AccountingPersistenceQuery

java.lang.Object

org.gcube.accounting.analytics.persistence.AccountingPersistenceQuery

public class AccountingPersistenceQuery
extends Object

Author:

Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Close the connection to persistence
protected static AccountingPersistenceQuery	getInstance()
Set<String>	getKeys(Class<? extends org.gcube.accounting.datamodel.AggregatedUsageRecord> usageRecordType) Return the list of key valid for queries a certain usage record type
Set<String>	getPossibleValuesForKey(Class<? extends org.gcube.accounting.datamodel.AggregatedUsageRecord> usageRecordType, String key) Return the list of possible values for a key for a certain usage record type
Map<Calendar,Info>	query(Class<? extends org.gcube.accounting.datamodel.AggregatedUsageRecord> usageRecordType, TemporalConstraint temporalConstraint, List<Filter> filters) Query the persistence obtaining a Map where the date is the key and the #Info is the value.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

protected static AccountingPersistenceQuery getInstance()

query

public Map<Calendar,Info> query(Class<? extends org.gcube.accounting.datamodel.AggregatedUsageRecord> usageRecordType,
                       TemporalConstraint temporalConstraint,
                       List<Filter> filters)
                         throws Exception

Query the persistence obtaining a Map where the date is the key and the #Info is the value. The result is relative to an Usage Record Type, respect a TemporalConstraint and can be applied one or more filters.

Parameters:

usageRecordType - the Usage Record Type of interest

temporalConstraint - the TemporalConstraint (interval and aggregation)

filters - the filter for the query. If null or empty string get all data. The filters are evaluated in the order the are presented and are considered in AND

Returns:

the Map containing for each date in the required interval the requested data

Throws:

Exception - if fails

getKeys

public Set<String> getKeys(Class<? extends org.gcube.accounting.datamodel.AggregatedUsageRecord> usageRecordType)
                    throws Exception

Return the list of key valid for queries a certain usage record type

Parameters:

usageRecordType - the usage record type

Returns:

a set containing the list of key

Throws:

Exception - if fails

getPossibleValuesForKey

public Set<String> getPossibleValuesForKey(Class<? extends org.gcube.accounting.datamodel.AggregatedUsageRecord> usageRecordType,
                                  String key)
                                    throws Exception

Return the list of possible values for a key for a certain usage record type

Parameters:

usageRecordType - the usage record type

key - the key

Returns:

a set containing the list of possible values

Throws:

Exception - if fails

close

public void close()
           throws Exception

Close the connection to persistence

Throws:

Exception - if the close fails