public MapPlotResourceManager() {
for (PlotLineStyle plotLineStyle : PlotLineStyle.values()) {
for (PlotLineColor plotLineColor : PlotLineColor.values()) {
preparedLineDefs.add(PlotLineDef.newInstance(plotLineColor.getColor(), plotLineStyle));
}
}
}
/** User: serso Date: 1/19/13 Time: 12:48 AM */
public class MapPlotResourceManager implements PlotResourceManager {
@Nonnull
private Map<PlotLineDef, List<PlotLineDef>> registeredLineDefsMap =
new HashMap<PlotLineDef, List<PlotLineDef>>();
@Nonnull
private final List<PlotLineDef> preparedLineDefs =
new ArrayList<PlotLineDef>(PlotLineStyle.values().length * PlotLineColor.values().length);
public MapPlotResourceManager() {
for (PlotLineStyle plotLineStyle : PlotLineStyle.values()) {
for (PlotLineColor plotLineColor : PlotLineColor.values()) {
preparedLineDefs.add(PlotLineDef.newInstance(plotLineColor.getColor(), plotLineStyle));
}
}
}
@Nonnull
@Override
public PlotLineDef generateAndRegister() {
synchronized (this) {
for (PlotLineDef lineDef : preparedLineDefs) {
final List<PlotLineDef> registeredLineDefs = registeredLineDefsMap.get(lineDef);
if (registeredLineDefs == null || registeredLineDefs.isEmpty()) {
register(lineDef);
return lineDef;
}
}
return preparedLineDefs.get(0);
}
}
private void addLineDef(@Nonnull final PlotLineDef toBeAdded) {
if (!Thread.holdsLock(this)) throw new AssertionError();
List<PlotLineDef> registeredLineDefs = registeredLineDefsMap.get(toBeAdded);
if (registeredLineDefs == null) {
registeredLineDefs = new ArrayList<PlotLineDef>();
registeredLineDefsMap.put(toBeAdded, registeredLineDefs);
}
try {
Iterables.find(
registeredLineDefs,
new Predicate<PlotLineDef>() {
@Override
public boolean apply(@Nullable PlotLineDef lineDef) {
return lineDef == toBeAdded;
}
});
// already added
} catch (NoSuchElementException e) {
registeredLineDefs.add(toBeAdded);
}
}
private void removeLineDef(@Nonnull final PlotLineDef toBeRemoved) {
if (!Thread.holdsLock(this)) throw new AssertionError();
List<PlotLineDef> registeredLineDefs = registeredLineDefsMap.get(toBeRemoved);
if (registeredLineDefs != null) {
Iterables.removeIf(
registeredLineDefs,
new Predicate<PlotLineDef>() {
@Override
public boolean apply(@Nullable PlotLineDef lineDef) {
return lineDef == toBeRemoved;
}
});
if (registeredLineDefs.isEmpty()) {
registeredLineDefsMap.remove(toBeRemoved);
}
} else {
registeredLineDefsMap.remove(toBeRemoved);
}
}
@Override
public void register(@Nonnull PlotLineDef lineDef) {
synchronized (this) {
addLineDef(lineDef);
}
}
@Override
public void unregister(@Nonnull PlotLineDef lineDef) {
synchronized (this) {
removeLineDef(lineDef);
}
}
@Override
public void unregisterAll() {
synchronized (this) {
registeredLineDefsMap.clear();
}
}
}