org.eclipse.incquery.runtime.matchers.backend

Interface IQueryBackendHintProvider

All Known Implementing Classes:

IncQueryEngineImpl

public interface IQueryBackendHintProvider

Provides query evaluation hints to evaluation backends. May override hints embedded in query itself.

Since:

0.9

Author:

Bergmann Gabor

Field Summary

Fields

Modifier and Type	Field and Description
static IQueryBackendHintProvider	DEFAULT A default implementation that just returns the hints embedded in the query, without overriding.

Method Summary

Modifier and Type	Method and Description
java.util.Map<java.lang.String,java.lang.Object>	getHints(PQuery query) Suggests query evaluation hints regarding a query.

Field Detail

DEFAULT

static final IQueryBackendHintProvider DEFAULT

A default implementation that just returns the hints embedded in the query, without overriding.

Method Detail

getHints

java.util.Map<java.lang.String,java.lang.Object> getHints(PQuery query)

Suggests query evaluation hints regarding a query.

Returns:

non-null map of option keys and values