Helper PositionMap

Jan Burse, created Mar 16. 2019
package jekdev.model.pretty;
import jekpro.model.builtin.AbstractBranch;
import jekpro.model.inter.Predicate;
import jekpro.model.pretty.AbstractSource;
import jekpro.tools.term.PositionKey;
import matula.util.data.MapEntry;
import matula.util.data.MapHashLink;
/**
* <p>This class provides a synchronized position map.</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 PositionMap extends MapHashLink<PositionKey, PredicateSet> {
private MapEntry<PositionKey, Predicate[]>[] cachelocs;
private final static MapEntry<PositionKey, Predicate[]>[] VOID_POS = new MapEntry[0];
protected AbstractSource src;
/**
* <p>Create a locator.</p>
*
* @param s The source.
*/
public PositionMap(AbstractSource s) {
src = s;
}
/**
* <p>Add a position.</p>
*
* @param pos The position.
* @param pick The predicate.
*/
public void addPosition(PositionKey pos, Predicate pick) {
synchronized (src) {
PredicateSet loc = get(pos);
if (loc == null) {
loc = new PredicateSet();
add(pos, loc);
}
if (!loc.addPredicate(pick))
return;
cachelocs = null;
}
}
/**
* <p>Clear all positions.</p>
*/
public void clearPositions() {
synchronized (src) {
clear();
cachelocs = null;
}
}
/**
* <p>Retrieve all positions.</p>
*
* @return Snapshot of the positions.
*/
public MapEntry<PositionKey, Predicate[]>[] allPositions() {
MapEntry<PositionKey, Predicate[]>[] res = cachelocs;
if (res != null)
return res;
synchronized (src) {
res = cachelocs;
if (res != null)
return res;
if (size() != 0) {
res = new MapEntry[size()];
int k = 0;
for (MapEntry<PositionKey, PredicateSet> entry = getFirstEntry();
entry != null; entry = successor(entry)) {
PredicateSet loc = entry.value;
MapEntry<PositionKey, Predicate[]> help = new MapEntry<PositionKey, Predicate[]>();
help.key = entry.key;
help.value = loc.allPredicates();
res[k] = help;
k++;
}
} else {
res = VOID_POS;
}
cachelocs = res;
}
return res;
}
/**
* <p>Retrieve all predicates.</p>
*
* @return Snapshot of the predicates.
*/
public Predicate[] allPredicates(PositionKey pos) {
Predicate[] res;
synchronized (src) {
PredicateSet loc = get(pos);
res = (loc != null ? loc.allPredicates() :
AbstractBranch.FALSE_PREDS);
}
return res;
}
}

Comments