/**
* Matches a way with the given parameters against this RenderTheme.
*
* @param renderCallback the callback implementation which will be executed on each match.
* @param tags the tags of the way.
* @param zoomLevel the zoom level at which the way should be matched.
* @param closed way is Closed
* @param render ...
* @return currently processed render instructions
*/
public RenderInstruction[] matchWay(
IRenderCallback renderCallback, Tag[] tags, byte zoomLevel, boolean closed, boolean render) {
// list of renderinsctruction items in cache
RenderInstructionItem ris = null;
RenderInstructionItem prevInstructions = null;
// the item matching tags and zoomlevel
RenderInstructionItem ri = null;
// temporary matching instructions list
List<RenderInstruction> matches;
LRUCache<MatchingCacheKey, RenderInstructionItem> matchingCache;
MatchingCacheKey cacheKey;
if (closed) matchingCache = mAreaCache;
else matchingCache = mWayCache;
int zoomMask = 1 << zoomLevel;
synchronized (matchingCache) {
if (closed) {
cacheKey = mAreaCacheKey;
matches = mAreaInstructionList;
prevInstructions = mPrevAreaItem;
} else {
cacheKey = mWayCacheKey;
matches = mWayInstructionList;
prevInstructions = mPrevWayItem;
}
if (prevInstructions == null || (prevInstructions.zoom & zoomMask) == 0) {
// previous instructions zoom does not match
cacheKey.set(tags, null);
} else {
// compare if tags match previous instructions
if (cacheKey.set(tags, prevInstructions.key)) {
// Log.d(TAG, "same as previous " +
// Arrays.deepToString(tags));
ri = prevInstructions;
}
}
if (ri == null) {
ris = matchingCache.get(cacheKey);
for (ri = ris; ri != null; ri = ri.next)
if ((ri.zoom & zoomMask) != 0)
// cache hit
break;
}
if (ri == null) {
// cache miss
// Log.d(TAG, missCnt++ + " / " + hitCnt + " Cache Miss");
int c = (closed ? Closed.YES : Closed.NO);
// List<RenderInstruction> matches = mMatchingList;
matches.clear();
for (int i = 0, n = mRulesList.size(); i < n; ++i)
mRulesList.get(i).matchWay(renderCallback, tags, zoomLevel, c, matches);
int size = matches.size();
// check if same instructions are used in another level
for (ri = ris; ri != null; ri = ri.next) {
if (size == 0) {
if (ri.list != null) continue;
// both matchinglists are empty
break;
}
if (ri.list == null) continue;
if (ri.list.length != size) continue;
int i = 0;
for (RenderInstruction r : ri.list) {
if (r != matches.get(i)) break;
i++;
}
if (i == size)
// both matching lists contain the same items
break;
}
if (ri != null) {
// we found a same matchting list on another zoomlevel
ri.zoom |= zoomMask;
// Log.d(TAG,
// zoomLevel + " same instructions " + size + " "
// + Arrays.deepToString(tags));
} else {
// Log.d(TAG,
// zoomLevel + " new instructions " + size + " "
// + Arrays.deepToString(tags));
ri = new RenderInstructionItem();
ri.zoom = zoomMask;
if (size > 0) {
ri.list = new RenderInstruction[size];
matches.toArray(ri.list);
}
// attach this list to the one found for MatchingKey
if (ris != null) {
ri.next = ris.next;
ri.key = ris.key;
ris.next = ri;
} else {
ri.key = new MatchingCacheKey(cacheKey);
matchingCache.put(ri.key, ri);
}
}
}
if (closed) mPrevAreaItem = ri;
else mPrevWayItem = ri;
}
if (render && ri.list != null) {
for (int i = 0, n = ri.list.length; i < n; i++) ri.list[i].renderWay(renderCallback, tags);
}
return ri.list;
}
/**
* @param renderCallback ...
* @param tags ...
* @param zoomLevel ...
* @return ...
*/
public RenderInstruction[] matchNode(IRenderCallback renderCallback, Tag[] tags, byte zoomLevel) {
// list of renderinsctruction items in cache
RenderInstructionItem ris = null;
// the item matching tags and zoomlevel
RenderInstructionItem ri = null;
synchronized (mNodesCache) {
int zoomMask = 1 << zoomLevel;
MatchingCacheKey cacheKey = mNodeCacheKey;
if (mPrevNodeItem == null || (mPrevNodeItem.zoom & zoomMask) == 0) {
// previous instructions zoom does not match
cacheKey.set(tags, null);
} else {
// compare if tags match previous instructions
if (cacheKey.set(tags, mPrevNodeItem.key)) ri = mPrevNodeItem;
}
if (ri == null) {
boolean found = mNodesCache.containsKey(cacheKey);
if (found) {
ris = mNodesCache.get(cacheKey);
for (ri = ris; ri != null; ri = ri.next)
if ((ri.zoom & zoomMask) != 0)
// cache hit
break;
}
}
if (ri == null) {
// cache miss
List<RenderInstruction> matches = mNodeInstructionList;
matches.clear();
for (int i = 0, n = mRulesList.size(); i < n; ++i)
mRulesList.get(i).matchNode(renderCallback, tags, zoomLevel, matches);
int size = matches.size();
// check if same instructions are used in another level
for (ri = ris; ri != null; ri = ri.next) {
if (size == 0) {
if (ri.list != null) continue;
// both matchinglists are empty
break;
}
if (ri.list == null) continue;
if (ri.list.length != size) continue;
int i = 0;
for (RenderInstruction r : ri.list) {
if (r != matches.get(i)) break;
i++;
}
if (i == size)
// both matching lists contain the same items
break;
}
if (ri != null) {
// we found a same matchting list on another zoomlevel
ri.zoom |= zoomMask;
} else {
ri = new RenderInstructionItem();
ri.zoom = zoomMask;
if (size > 0) {
ri.list = new RenderInstruction[size];
matches.toArray(ri.list);
}
// attach this list to the one found for MatchingKey
if (ris != null) {
ri.next = ris.next;
ri.key = ris.key;
ris.next = ri;
} else {
ri.key = new MatchingCacheKey(cacheKey);
mNodesCache.put(ri.key, ri);
}
}
}
}
if (ri.list != null) render(renderCallback, ri.list, tags);
mPrevNodeItem = ri;
return ri.list;
}
