Helfer PredicateSet

Jan Burse, erstellt 18. Mär 2019
package jekdev.model.pretty;
import jekpro.model.builtin.AbstractBranch;
import jekpro.model.inter.Predicate;
import matula.util.data.ListArray;
/**
* <p>This class provides a unsynchronized predicate set.</p>
* <p/>
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
* <p/>
* Rights & License
* All industrial property rights regarding the information - copyright
* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
* <p/>
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
* <p/>
* Restrictions
* Only to be distributed with programs that add sgnificant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
* <p/>
* Trademarks
* Jekejeke is a registered trademark of XLOG Technologies GmbH.
*/
public final class PredicateSet extends ListArray<Predicate> {
private Predicate[] cachepreds;
/**
* <p>Add a predicate.</p>
*
* @param pick The predicate.
* @return True if cache was cleared, otherwise false.
*/
public boolean addPredicate(Predicate pick) {
if (contains(pick))
return false;
add(pick);
cachepreds = null;
return true;
}
/**
* <p>Retrieve all predicates.</p>
*
* @return The predicates.
*/
public Predicate[] allPredicates() {
Predicate[] res = cachepreds;
if (res != null)
return res;
if (size() != 0) {
res = new Predicate[size()];
toArray(res);
} else {
res = AbstractBranch.FALSE_PREDS;
}
cachepreds = res;
return res;
}
}

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