org.eclipse.incquery.runtime.localsearch.operations.extend

Class CountOperation

java.lang.Object

org.eclipse.incquery.runtime.localsearch.operations.extend.ExtendOperation<java.lang.Integer>

org.eclipse.incquery.runtime.localsearch.operations.extend.CountOperation

All Implemented Interfaces:

IMatcherBasedOperation, ISearchOperation

public class CountOperation
extends ExtendOperation<java.lang.Integer>
implements IMatcherBasedOperation

Calculates the count of matches for a called matcher

Author:

Zoltan Ujhelyi

Constructor Summary

Constructors

Constructor and Description
CountOperation(PQuery calledQuery, java.util.Map<java.lang.Integer,java.lang.Integer> frameMapping, int position)

Method Summary

Modifier and Type	Method and Description
LocalSearchMatcher	getAndPrepareCalledMatcher(MatchingFrame frame, ISearchContext context) Gets the called matcher based on the context and the current adornment and stores it in the corresponding field of the operation
LocalSearchMatcher	getCalledMatcher() Gets the called matcher associated with the operation
java.util.List<java.lang.Integer>	getVariablePositions()
void	onInitialize(MatchingFrame frame, ISearchContext context) During the execution of the corresponding plan, the onInitialize callback is evaluated before the execution of the operation may begin.
java.lang.String	toString()

Methods inherited from class org.eclipse.incquery.runtime.localsearch.operations.extend.ExtendOperation

execute, onBacktrack

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CountOperation

public CountOperation(PQuery calledQuery,
                      java.util.Map<java.lang.Integer,java.lang.Integer> frameMapping,
                      int position)

Method Detail

getAndPrepareCalledMatcher

public LocalSearchMatcher getAndPrepareCalledMatcher(MatchingFrame frame,
                                                     ISearchContext context)

Description copied from interface: IMatcherBasedOperation

Gets the called matcher based on the context and the current adornment and stores it in the corresponding field of the operation

Specified by:

getAndPrepareCalledMatcher in interface IMatcherBasedOperation

Parameters:

frame - the current matching frame

context - the search context

Returns:

the called local search matcher

getCalledMatcher

public LocalSearchMatcher getCalledMatcher()

Description copied from interface: IMatcherBasedOperation

Gets the called matcher associated with the operation

Specified by:

getCalledMatcher in interface IMatcherBasedOperation

Returns:

the called local search matcher or null if no matcher assigned

onInitialize

public void onInitialize(MatchingFrame frame,
                         ISearchContext context)
                  throws LocalSearchException

Description copied from interface: ISearchOperation

During the execution of the corresponding plan, the onInitialize callback is evaluated before the execution of the operation may begin. Operations may use this method to initialize its internal data structures.

Specified by:

onInitialize in interface ISearchOperation

Throws:

LocalSearchException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getVariablePositions

public java.util.List<java.lang.Integer> getVariablePositions()

Specified by:

getVariablePositions in interface ISearchOperation

Returns:

the ordered list of the variable numbers that are affected by the search operation