Package net.ontopia.topicmaps.query.impl.rdbms

Class JDOBasicPredicate

java.lang.Object

net.ontopia.topicmaps.query.impl.rdbms.JDOBasicPredicate

All Implemented Interfaces:

BasicPredicateIF, JDOPredicateIF, PredicateIF

public class JDOBasicPredicate
extends Object
implements JDOPredicateIF

INTERNAL: A predicate wrapper that delegates all it's method calls to the nested basic predicate.

Field Summary

Fields

Modifier and Type	Field	Description
protected BasicPredicateIF	pred

Constructor Summary

Constructors

Constructor	Description
JDOBasicPredicate(BasicPredicateIF pred)

Method Summary

Modifier and Type	Method	Description
boolean	buildQuery(QueryBuilder builder, List expressions, List arguments)	INTERNAL: Registers JDOExpressionsIF for this predicate with the query builder.
int	getCost(boolean[] boundparams)	INTERNAL.
String	getName()	INTERNAL: Returns the name of the predicate.
String	getSignature()	INTERNAL: Returns a string representing the signature of the predicate.
boolean	isRecursive()	INTERNAL:
void	prescan(QueryBuilder builder, List arguments)	INTERNAL: This method will be called before building the query.
QueryMatches	satisfy(QueryMatches result, Object[] arguments)

Methods inherited from class java.lang.Object

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

Field Detail

pred

protected BasicPredicateIF pred

Constructor Detail

JDOBasicPredicate

public JDOBasicPredicate(BasicPredicateIF pred)

Method Detail

getName

public String getName()

Description copied from interface: PredicateIF

INTERNAL: Returns the name of the predicate. This will usually be the name of the predicate within its module ('instance-of', '/=', 'starts-with'), but some virtual predicates cannot be reached from the syntax and may return names that will not parse.

Specified by:

getName in interface PredicateIF

getSignature

public String getSignature()
                    throws InvalidQueryException

Description copied from interface: PredicateIF

INTERNAL: Returns a string representing the signature of the predicate. The string consists of a whitespace-separated list of arguments, where each argument is made up of tokens representing the type or cardinality of that argument.

The instance-of predicate would have a signature of "t t", while /= would have ". .", and in would have ". .+". For full details, see topicmaps.impl.utils.ArgumentValidator.

Specified by:

getSignature in interface PredicateIF

Throws:

InvalidQueryException

getCost

public int getCost(boolean[] boundparams)

Description copied from interface: PredicateIF

INTERNAL.

Specified by:

getCost in interface PredicateIF

satisfy

public QueryMatches satisfy(QueryMatches result,
                            Object[] arguments)
                     throws InvalidQueryException

Specified by:

satisfy in interface BasicPredicateIF

Throws:

InvalidQueryException

isRecursive

public boolean isRecursive()

Description copied from interface: JDOPredicateIF

INTERNAL:

Specified by:

isRecursive in interface JDOPredicateIF

prescan

public void prescan(QueryBuilder builder,
                    List arguments)

Description copied from interface: JDOPredicateIF

INTERNAL: This method will be called before building the query. It is used mainly for analyzing the predicate.

Specified by:

prescan in interface JDOPredicateIF

buildQuery

public boolean buildQuery(QueryBuilder builder,
                          List expressions,
                          List arguments)
                   throws InvalidQueryException

Description copied from interface: JDOPredicateIF

INTERNAL: Registers JDOExpressionsIF for this predicate with the query builder.

Specified by:

buildQuery in interface JDOPredicateIF

Returns:

true if predicate was mapped to JDO expression; false if the predicate could not be mapped to an JDO expression.

Throws:

InvalidQueryException