/**
* Processes the given number of POIs.
*
* @param mapDataSink the callback which handles the extracted POIs.
* @param numberOfPois how many POIs should be processed.
* @return true if the POIs could be processed successfully, false otherwise.
*/
private boolean processPOIs(ITileDataSink mapDataSink, int numberOfPois) {
Tag[] poiTags = mTileSource.fileInfo.poiTags;
MapElement e = mElem;
int numTags = 0;
for (int elementCounter = numberOfPois; elementCounter != 0; --elementCounter) {
if (mDebugFile) {
/* get and check the POI signature */
mSignaturePoi = mReadBuffer.readUTF8EncodedString(SIGNATURE_LENGTH_POI);
if (!mSignaturePoi.startsWith("***POIStart")) {
log.warn("invalid POI signature: " + mSignaturePoi);
log.warn(DEBUG_SIGNATURE_BLOCK + mSignatureBlock);
return false;
}
}
/* get the POI latitude offset (VBE-S) */
int latitude = mTileLatitude + mReadBuffer.readSignedInt();
/* get the POI longitude offset (VBE-S) */
int longitude = mTileLongitude + mReadBuffer.readSignedInt();
/* get the special byte which encodes multiple flags */
byte specialByte = mReadBuffer.readByte();
/* bit 1-4 represent the layer */
byte layer = (byte) ((specialByte & POI_LAYER_BITMASK) >>> POI_LAYER_SHIFT);
/* bit 5-8 represent the number of tag IDs */
byte numberOfTags = (byte) (specialByte & POI_NUMBER_OF_TAGS_BITMASK);
if (numberOfTags != 0) {
if (!mReadBuffer.readTags(e.tags, poiTags, numberOfTags)) return false;
numTags = numberOfTags;
}
/* reset to common tag position */
e.tags.numTags = numTags;
/* get the feature bitmask (1 byte) */
byte featureByte = mReadBuffer.readByte();
/* bit 1-3 enable optional features
* check if the POI has a name */
if ((featureByte & POI_FEATURE_NAME) != 0) {
String str = mReadBuffer.readUTF8EncodedString();
e.tags.add(new Tag(Tag.KEY_NAME, str, false));
}
/* check if the POI has a house number */
if ((featureByte & POI_FEATURE_HOUSE_NUMBER) != 0) {
// mReadBuffer.getPositionAndSkip();
// String str =
mReadBuffer.readUTF8EncodedString();
}
/* check if the POI has an elevation */
if ((featureByte & POI_FEATURE_ELEVATION) != 0) {
mReadBuffer.readSignedInt();
// mReadBuffer.getPositionAndSkip();// tags.add(new
// Tag(Tag.TAG_KEY_ELE,
// Integer.toString(mReadBuffer.readSignedInt())));
}
mTileProjection.projectPoint(latitude, longitude, e);
e.setLayer(layer);
mapDataSink.process(e);
}
return true;
}
