org.aksw.limes.core.execution.planning.planner

Class CanonicalPlanner

java.lang.Object

org.aksw.limes.core.execution.planning.planner.Planner

org.aksw.limes.core.execution.planning.planner.CanonicalPlanner

All Implemented Interfaces:

IPlanner

public class CanonicalPlanner
extends Planner

Implements the Canonical planner class. It receives a link specification as input and generates an immutable NestedPlan.

Version:

1.0

Author:

Axel-C. Ngonga Ngomo (ngonga@informatik.uni-leipzig.de), Kleanthi Georgala (georgala@informatik.uni-leipzig.de)

Constructor Summary

Constructors

Constructor and Description
CanonicalPlanner() Constructor of the CanonicalPlanner class.

Method Summary

Modifier and Type	Method and Description
boolean	isStatic() Returns the status of the planner.
LinkSpecification	normalize(LinkSpecification spec) Normalization of input link specification.
NestedPlan	plan(LinkSpecification spec) Generates a NestedPlan for a link specification.

Methods inherited from class java.lang.Object

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

Constructor Detail

CanonicalPlanner

public CanonicalPlanner()

Constructor of the CanonicalPlanner class.

Method Detail

plan

public NestedPlan plan(LinkSpecification spec)

Generates a NestedPlan for a link specification. If the link specification is null or empty it returns an empty plan. If the link specification is atomic, the planner generates a simple plan that consists of one RUN instruction. If the link specification is complex, firstly it generates a plan for each of the children specifications and sets them as subPlans. Then, it assigns to the plan the corresponding command based on the link specification operator and finally creates a filtering instruction using the filtering expression and threshold of the input link specification.

Parameters:

spec - Input link specification

Returns:

a NestedPlan of the input link specification

isStatic

public boolean isStatic()

Returns the status of the planner.

Returns:

true

normalize

public LinkSpecification normalize(LinkSpecification spec)

Normalization of input link specification.

Parameters:

spec - The input link specification

Returns:

the normalized link specification