org.eclipse.viatra.cep.core.engine.compiler.util

Class FollowsPatternQuerySpecification

java.lang.Object

org.eclipse.viatra.query.runtime.api.impl.BaseQuerySpecification<Matcher>

org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification<FollowsPatternMatcher>

org.eclipse.viatra.cep.core.engine.compiler.util.FollowsPatternQuerySpecification

All Implemented Interfaces:

IQuerySpecification<FollowsPatternMatcher>, PQueryHeader

public final class FollowsPatternQuerySpecification
extends BaseGeneratedEMFQuerySpecification<FollowsPatternMatcher>

A pattern-specific query specification that can instantiate FollowsPatternMatcher in a type-safe way.

See Also:

FollowsPatternMatcher, FollowsPatternMatch

Field Summary

Fields inherited from class org.eclipse.viatra.query.runtime.api.impl.BaseQuerySpecification

wrappedPQuery

Method Summary

Modifier and Type	Method and Description
static FollowsPatternQuerySpecification	instance()
FollowsPatternMatcher	instantiate() For backward compatibility of code generated with previous versions of viatra query, this method has a default implementation returning null, indicating that a matcher can only be created using the old method, which ignores the hints provided by the user.
protected FollowsPatternMatcher	instantiate(ViatraQueryEngine engine)
FollowsPatternMatch	newEmptyMatch() Returns an empty, mutable Match compatible with matchers of this query.
FollowsPatternMatch	newMatch(java.lang.Object... parameters) Returns a new (partial) Match object compatible with matchers of this query.

Methods inherited from class org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification

getPreferredScopeClass

Methods inherited from class org.eclipse.viatra.query.runtime.api.impl.BaseQuerySpecification

ensureInitializedInternal, ensureInitializedInternalSneaky, getAllAnnotations, getAnnotationsByName, getFirstAnnotationByName, getFullyQualifiedName, getInternalQueryRepresentation, getMatcher, getParameterNames, getParameters, getPositionOfParameter, processInitializerError

Methods inherited from class java.lang.Object

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

Method Detail

instance

public static FollowsPatternQuerySpecification instance()
                                                 throws ViatraQueryException

Returns:

the singleton instance of the query specification

Throws:

ViatraQueryException - if the pattern definition could not be loaded

instantiate

protected FollowsPatternMatcher instantiate(ViatraQueryEngine engine)
                                     throws ViatraQueryException

Specified by:

instantiate in class BaseQuerySpecification<FollowsPatternMatcher>

Throws:

ViatraQueryException

instantiate

public FollowsPatternMatcher instantiate()
                                  throws ViatraQueryException

Description copied from class: BaseQuerySpecification

For backward compatibility of code generated with previous versions of viatra query, this method has a default implementation returning null, indicating that a matcher can only be created using the old method, which ignores the hints provided by the user.

Specified by:

instantiate in interface IQuerySpecification<FollowsPatternMatcher>

Overrides:

instantiate in class BaseQuerySpecification<FollowsPatternMatcher>

Throws:

ViatraQueryException

newEmptyMatch

public FollowsPatternMatch newEmptyMatch()

Description copied from interface: IQuerySpecification

Returns an empty, mutable Match compatible with matchers of this query. Fields of the mutable match can be filled to create a partial match, usable as matcher input. This can be used to call the matcher with a partial match even if the specific class of the matcher or the match is unknown.

Returns:

the empty match

newMatch

public FollowsPatternMatch newMatch(java.lang.Object... parameters)

Description copied from interface: IQuerySpecification

Returns a new (partial) Match object compatible with matchers of this query. This can be used e.g. to call the matcher with a partial match.

The returned match will be immutable. Use IQuerySpecification.newEmptyMatch() to obtain a mutable match object.

Parameters:

parameters - the fixed value of pattern parameters, or null if not bound.

Returns:

the (partial) match object.