com.espertech.esper.epl.join.plan

Class CoercionUtil

java.lang.Object

com.espertech.esper.epl.join.plan.CoercionUtil

public class CoercionUtil
extends Object

Constructor Summary

Constructors

Constructor and Description
CoercionUtil()

Method Summary

Modifier and Type	Method and Description
static Class	getCoercionTypeRange(EventType indexedType, String indexedProp, SubordPropRangeKey rangeKey)
static Class	getCoercionTypeRangeIn(Class valuePropType, ExprNode exprStart, ExprNode exprEnd)
static CoercionDesc	getCoercionTypesHash(EventType[] typesPerStream, int lookupStream, int indexedStream, List<QueryGraphValueEntryHashKeyed> 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<SubordPropHashKey> hashKeys)
static CoercionDesc	getCoercionTypesRange(EventType[] typesPerStream, int indexedStream, String[] indexedProp, List<QueryGraphValueEntryRange> rangeEntries)
static CoercionDesc	getCoercionTypesRange(EventType viewableEventType, Map<String,SubordPropRangeKey> rangeProps, EventType[] typesPerStream)

Methods inherited from class java.lang.Object

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

Constructor Detail

CoercionUtil

public CoercionUtil()

Method Detail

getCoercionTypesRange

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

getCoercionTypesHash

public static CoercionDesc getCoercionTypesHash(EventType[] typesPerStream,
                                                int lookupStream,
                                                int indexedStream,
                                                List<QueryGraphValueEntryHashKeyed> 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

getCoercionTypeRange

public static Class getCoercionTypeRange(EventType indexedType,
                                         String indexedProp,
                                         SubordPropRangeKey rangeKey)

getCoercionTypesRange

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

getCoercionTypesHash

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

getCoercionTypeRangeIn

public static Class getCoercionTypeRangeIn(Class valuePropType,
                                           ExprNode exprStart,
                                           ExprNode exprEnd)