com.ibm.workplace.wcm.api.query
Class Negation

java.lang.Object
  com.ibm.workplace.wcm.api.query.Negation

All Implemented Interfaces:

QueryElement, Selector, java.io.Serializable

public final class Negation
extends java.lang.Object
implements Selector

Negation inverts a selector. Note that Negation may prevent the database from efficiently using indexes and therefore may perform slowly. It should therefore only be used if necessary. Example use of Negation with Conjunction and Disjunction

  Query query = queryService.createQuery(Content.class);
  Disjunction or = new Disjunction();
  or.add(Selectors.nameLike("news%"));
  Negation not = new Negation(ProfileSelectors.keywordsContain("news"));
  Conjunction and = new Conjunction();
  and.add(Selectors.nameLike("article%"));
  and.add(not);
  or.add(and);
  query.addSelector(or);
 

Since:

8.0

See Also:

Serialized Form

Field Summary

Fields inherited from interface com.ibm.workplace.wcm.api.query.Selector

NULL_SELECTOR

Constructor Summary

Negation()
Constructor

Negation(Selector selector)
Constructor

Method Summary

java.util.List<? extends QueryElement>	getElements()
Selector	getSelector() Get the selector
boolean	hasElements()
void	set(Selector selector) Sets the selector

Methods inherited from class java.lang.Object

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

Constructor Detail

Negation

public Negation()

Constructor

Negation

public Negation(Selector selector)

Constructor

Parameters:

selector - associated selector

Method Detail

set

public void set(Selector selector)

Sets the selector

Parameters:

selector - the selector to set

getSelector

public Selector getSelector()

Get the selector

Returns:

the current selector

hasElements

public boolean hasElements()

Specified by:

hasElements in interface QueryElement

getElements

public java.util.List<? extends QueryElement> getElements()

Specified by:

getElements in interface QueryElement