ptdb.kernel.bl.search

Class GraphSearcher

java.lang.Object

ptdb.kernel.bl.search.AbstractSearcher

ptdb.kernel.bl.search.GraphSearcher

All Implemented Interfaces:

ResultHandler

Direct Known Subclasses:

PatternMatchGraphSearcher, XQueryGraphSearcher

public abstract class GraphSearcher
extends AbstractSearcher

Inherits from the AbstractSearcher, and contains the common functions for the searchers for graph pattern match search.

Since:

Ptolemy II 10.0

Version:

$Id$

Author:

Alek Wang

Pt.AcceptedRating:

red (wenjiaow)

Pt.ProposedRating:

red (wenjiaow)

Field Summary

Fields

Modifier and Type	Field and Description
protected DBGraphSearchCriteria	_dbGraphSearchCriteria The search criteria for graph pattern matching that are input by the user.

Fields inherited from class ptdb.kernel.bl.search.AbstractSearcher

_currentResults, _dbConnection, _errorModels, _isIndependent, _nextResultHandler, _previousResults

Constructor Summary

Constructors

Constructor and Description
GraphSearcher()

Method Summary

Modifier and Type	Method and Description
protected boolean	_isSearchCriteriaSet() Checks whether the graph search criteria has been set in this graph searcher instance.
static java.util.ArrayList<GraphSearcher>	getGraphSearcher(SearchCriteria searchCriteria) A factory which returns the concrete GraphSearcher objects according to the complexity of the search criteria from the user.

Methods inherited from class ptdb.kernel.bl.search.AbstractSearcher

_addErrorModel, _isFirstSearcher, _isIndependent, _isIntersectNeeded, _isLastSeacher, _pass, _search, handleIntermediateResults, handleResults, isPassed, isSearchCancelled, noIntersect, passErrorModels, setConnection, setFirstSearcher, setLastSearcher, setNextResultHandler, setPreviousSeacher, wholeSearchDone

Methods inherited from class java.lang.Object

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

Field Detail

_dbGraphSearchCriteria

protected DBGraphSearchCriteria _dbGraphSearchCriteria

The search criteria for graph pattern matching that are input by the user.

Constructor Detail

GraphSearcher

public GraphSearcher()

Method Detail

getGraphSearcher

public static java.util.ArrayList<GraphSearcher> getGraphSearcher(SearchCriteria searchCriteria)

A factory which returns the concrete GraphSearcher objects according to the complexity of the search criteria from the user.

Different graph searcher has different capability to perform the graph pattern match search. The original design is that this factory method will return the appropriate searchers according to the given graph pattern search criteria.

For now, due to the limitation of searching patterns in the database, this factory will anyway construct both XQueryGraphSearcher and PatternMatchGraphSearcher, and return both of them in a list. The first searcher in the list will be the instance of the XQueryGraphSearcher, and the second will be PatternMatchGraphSearcher.

Parameters:

searchCriteria - The search criteria input by the user.

Returns:

The list that contains the required graph searchers, created according to the search criteria. The searchers in the returned list should be used in their order in the list.

_isSearchCriteriaSet

protected boolean _isSearchCriteriaSet()

Checks whether the graph search criteria has been set in this graph searcher instance.

Specified by:

_isSearchCriteriaSet in class AbstractSearcher

Returns:

true - if the search criteria has been set.
false - if the search criteria has not been set.