de.fuberlin.wiwiss.semmf.descr.impl
Class NodeMatchingDescriptionImpl

java.lang.Object
  de.fuberlin.wiwiss.semmf.descr.impl.NodeMatchingDescriptionImpl

All Implemented Interfaces:

NodeMatchingDescription

public class NodeMatchingDescriptionImpl
extends java.lang.Object
implements NodeMatchingDescription

Version:

1.0 last modified 29.11.2006

Author:

Radoslaw Oldakowski

Field Summary

private boolean	isReversed flags if the matching of this node should be reversed (=> switch query and resource nodes)
private java.lang.String	label Label of this node
Matcher	matcher A Matcher which will be used to calculate the similarity of the query and resource nodes.
private java.util.List	propertyMatchingDescriptionList List of objects implementing the PropertyMatchingDescription interface.
java.lang.String	queryNodePath RDQL path expression leading to the query node
java.lang.String	resNodePath RDQL path expression leading to the resource node of a ceartain resource graph
private float	weight Weight of this node

Constructor Summary

NodeMatchingDescriptionImpl(java.lang.String label, float weight)
Constructor.

NodeMatchingDescriptionImpl(java.lang.String label, float weight, boolean reversedMatching)
Constructor.

Method Summary

void	addPropertyMatchingDescription(PropertyMatchingDescription pmd) Adds a new PropertyMatchingDescription to the class interanal List of pmd's
java.lang.String	getLabel()
Matcher	getMatcher()
java.util.List	getPropertyMatchingDescriptionList()
java.lang.String	getQueryNodePath()
java.lang.String	getResourceNodePath()
float	getWeight()
boolean	hasProperties()
boolean	reverseMatching() In most cases the matching engine compares a value from a resource graph with the semantically corresponding value from a query graph (= the "required" value).
void	setReversed(boolean reversed) Specifies if the matching of this node should be reversed

Methods inherited from class java.lang.Object

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

Field Detail

label

private java.lang.String label

Label of this node

weight

private float weight

Weight of this node

queryNodePath

public java.lang.String queryNodePath

RDQL path expression leading to the query node

resNodePath

public java.lang.String resNodePath

RDQL path expression leading to the resource node of a ceartain resource graph

matcher

public Matcher matcher

A Matcher which will be used to calculate the similarity of the query and resource nodes.

isReversed

private boolean isReversed

flags if the matching of this node should be reversed (=> switch query and resource nodes)

propertyMatchingDescriptionList

private java.util.List propertyMatchingDescriptionList

List of objects implementing the PropertyMatchingDescription interface. These objects hold information about the matching of Property hanging from blank nodes in resource and query graphs

Constructor Detail

NodeMatchingDescriptionImpl

public NodeMatchingDescriptionImpl(java.lang.String label,
                                   float weight)

Constructor. In a vast majority of cases the node matching is not reversed if otherwise use the other constructor.

Parameters:

label - label of this node

weight - weight of this node

NodeMatchingDescriptionImpl

public NodeMatchingDescriptionImpl(java.lang.String label,
                                   float weight,
                                   boolean reversedMatching)

Constructor.

Parameters:

label - label of this node

weight - weight of this node

reversedMatching - flags whether the matching of this node should be reversed

Method Detail

addPropertyMatchingDescription

public void addPropertyMatchingDescription(PropertyMatchingDescription pmd)

Adds a new PropertyMatchingDescription to the class interanal List of pmd's

setReversed

public void setReversed(boolean reversed)

Specifies if the matching of this node should be reversed

Parameters:

reversed - true if the matching of this node should be reversed

getLabel

public java.lang.String getLabel()

Specified by:

getLabel in interface NodeMatchingDescription

Returns:

label of this node.

getWeight

public float getWeight()

Specified by:

getWeight in interface NodeMatchingDescription

Returns:

the weight which represents the importance of this node among other nodes in a particular ClusterMatchingDescription The weight is a float number [0..1]. The sum of all node weights equals 1.

getQueryNodePath

public java.lang.String getQueryNodePath()

Specified by:

getQueryNodePath in interface NodeMatchingDescription

Returns:

RDQL path expression which will be evaluated by the matching engine in order to find the queryNode.

getResourceNodePath

public java.lang.String getResourceNodePath()

Specified by:

getResourceNodePath in interface NodeMatchingDescription

Returns:

RDQL path expression which will be evaluated by the matching engine in order to find a particualr resourceNode.

getMatcher

public Matcher getMatcher()

Specified by:

getMatcher in interface NodeMatchingDescription

Returns:

a Matcher which is associated with this NodeMatchingDescriptionImpl and which will be used to calcualte the similarity between the query and resource nodes.

reverseMatching

public boolean reverseMatching()

In most cases the matching engine compares a value from a resource graph with the semantically corresponding value from a query graph (= the "required" value). But for some nodes it is reasonable to reverse the matching. A good example is comparing job requirements with applicant's profile. If a person (query graph) looks for a job (resource graph) then while comparing his skills with skills required for a certain position the required skills from a resource graph (job description) become the "should be" values, thus the matching has to be reversed.

Specified by:

reverseMatching in interface NodeMatchingDescription

Returns:

true if the matching should be reversed

hasProperties

public boolean hasProperties()

Specified by:

hasProperties in interface NodeMatchingDescription

Returns:

true if this node has properties which should be matched

getPropertyMatchingDescriptionList

public java.util.List getPropertyMatchingDescriptionList()

Specified by:

getPropertyMatchingDescriptionList in interface NodeMatchingDescription

Returns:

list of objects implementing the PropertyMatchingDescription interface. These objects hold information about the matching of Property values hanging from a blank node.