Package com.espertech.esper.common.internal.epl.join.queryplan

Class CoercionUtil

java.lang.Object

com.espertech.esper.common.internal.epl.join.queryplan.CoercionUtil

public class CoercionUtil
extends Object

Constructor Summary

Constructors

Constructor	Description
CoercionUtil()

Method Summary

Modifier and Type	Method	Description
static EPTypeClass	getCoercionTypeRangeIn(EPType valuePropType, ExprNode exprStart, ExprNode exprEnd)
static EPTypeClass[]	getCoercionTypes(EPType[] propTypes)
static CoercionDesc	getCoercionTypesHash(EventType[] typesPerStream, int lookupStream, int indexedStream, List<QueryGraphValueEntryHashKeyedForge> keyProps, String[] indexProps)	Returns null if no coercion is required, or an array of classes for use in coercing the lookup keys and index keys into a common type.
static CoercionDesc	getCoercionTypesHash(EventType viewableEventType, String[] indexProps, List<SubordPropHashKeyForge> hashKeys)
static CoercionDesc	getCoercionTypesRange(EventType[] typesPerStream, int indexedStream, String[] indexedProp, List<QueryGraphValueEntryRangeForge> rangeEntries)
static CoercionDesc	getCoercionTypesRange(EventType viewableEventType, Map<String,SubordPropRangeKeyForge> rangeProps, EventType[] typesPerStream)

Methods inherited from class java.lang.Object

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

Constructor Details

CoercionUtil

public CoercionUtil()

Method Details

getCoercionTypesRange

public static CoercionDesc getCoercionTypesRange(EventType[] typesPerStream,
 int indexedStream,
 String[] indexedProp,
 List<QueryGraphValueEntryRangeForge> rangeEntries)

getCoercionTypesHash

public static CoercionDesc getCoercionTypesHash(EventType[] typesPerStream,
 int lookupStream,
 int indexedStream,
 List<QueryGraphValueEntryHashKeyedForge> keyProps,
 String[] indexProps)

Returns null if no coercion is required, or an array of classes for use in coercing the lookup keys and index keys into a common type.

Parameters:

typesPerStream - is the event types for each stream

lookupStream - is the stream looked up from

indexedStream - is the indexed stream

keyProps - is the properties to use to look up

indexProps - is the properties to index on

Returns:

coercion types, or null if none required

getCoercionTypesRange

public static CoercionDesc getCoercionTypesRange(EventType viewableEventType,
 Map<String,SubordPropRangeKeyForge> rangeProps,
 EventType[] typesPerStream)

getCoercionTypesHash

public static CoercionDesc getCoercionTypesHash(EventType viewableEventType,
 String[] indexProps,
 List<SubordPropHashKeyForge> hashKeys)

getCoercionTypeRangeIn

public static EPTypeClass getCoercionTypeRangeIn(EPType valuePropType,
 ExprNode exprStart,
 ExprNode exprEnd)

getCoercionTypes

public static EPTypeClass[] getCoercionTypes(EPType[] propTypes)