CoalescePredicate (Ontopia)

java.lang.Object
- net.ontopia.topicmaps.query.impl.basic.CoalescePredicate
- - net.ontopia.topicmaps.query.impl.rdbms.CoalescePredicate

All Implemented Interfaces:

BasicPredicateIF, JDOPredicateIF, PredicateIF
```
public class CoalescePredicate
extends CoalescePredicate
implements JDOPredicateIF
```
INTERNAL: Implements the coalesce predicate.

Constructor Summary

Constructors
Constructor Description

CoalescePredicate()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`buildQuery(QueryBuilder builder, List expressions, List arguments)`	INTERNAL: Registers JDOExpressionsIF for this predicate with the query builder.
`boolean`	`isRecursive()`	INTERNAL:
`void`	`prescan(QueryBuilder builder, List arguments)`	INTERNAL: This method will be called before building the query.

Methods inherited from class net.ontopia.topicmaps.query.impl.basic.CoalescePredicate
getCost, getName, getSignature, satisfy

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface net.ontopia.topicmaps.query.impl.basic.BasicPredicateIF
satisfy

Methods inherited from interface net.ontopia.topicmaps.query.parser.PredicateIF
getCost, getName, getSignature

- Constructor Detail
  - CoalescePredicate
```
public CoalescePredicate()
```
- Method Detail
  - 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
  - isRecursive
```
public boolean isRecursive()
```
    Description copied from interface: JDOPredicateIF
    
    INTERNAL:
    
    Specified by:
    
    isRecursive 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