org.eclipse.viatra.query.runtime.api.impl

Class BaseQueryGroup

java.lang.Object

org.eclipse.viatra.query.runtime.api.impl.BaseQueryGroup

All Implemented Interfaces:

IQueryGroup

Direct Known Subclasses:

BaseGeneratedPatternGroup, GenericQueryGroup, LazyLoadingQueryGroup, PackageBasedQueryGroup

public abstract class BaseQueryGroup
extends java.lang.Object
implements IQueryGroup

Base implementation of IQueryGroup.

Constructor Summary

Constructors

Constructor and Description
BaseQueryGroup()

Method Summary

Modifier and Type	Method and Description
protected void	prepare(AdvancedViatraQueryEngine engine)
void	prepare(ViatraQueryEngine engine) Initializes matchers for the group of patterns within an ViatraQueryEngine.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.viatra.query.runtime.api.IQueryGroup

getSpecifications

Constructor Detail

BaseQueryGroup

public BaseQueryGroup()

Method Detail

prepare

public void prepare(ViatraQueryEngine engine)
             throws ViatraQueryException

Description copied from interface: IQueryGroup

Initializes matchers for the group of patterns within an ViatraQueryEngine. If some of the pattern matchers are already constructed in the engine, no task is performed for them.

This preparation step has the advantage that it prepares pattern matchers for an arbitrary number of patterns in a single-pass traversal of the model. This is typically more efficient than traversing the model each time an individual pattern matcher is initialized on demand. The performance benefit only manifests itself if the engine is not in wildcard mode.

Specified by:

prepare in interface IQueryGroup

Parameters:

engine - the existing VIATRA Query engine in which the matchers will be created.

Throws:

ViatraQueryException - if there was an error in preparing the engine

prepare

protected void prepare(AdvancedViatraQueryEngine engine)
                throws ViatraQueryException

Throws:

ViatraQueryException