private int[][] readZoomTable(SubFileParameter subFileParameter) {
int rows = subFileParameter.zoomLevelMax - subFileParameter.zoomLevelMin + 1;
int[][] zoomTable = new int[rows][2];
int cumulatedNumberOfPois = 0;
int cumulatedNumberOfWays = 0;
for (int row = 0; row < rows; ++row) {
cumulatedNumberOfPois += mReadBuffer.readUnsignedInt();
cumulatedNumberOfWays += mReadBuffer.readUnsignedInt();
if (cumulatedNumberOfPois < 0 || cumulatedNumberOfPois > MAXIMUM_ZOOM_TABLE_OBJECTS) {
LOG.warning("invalid cumulated number of POIs in row " + row + ' ' + cumulatedNumberOfPois);
if (mDebugFile) {
LOG.warning(DEBUG_SIGNATURE_BLOCK + mSignatureBlock);
}
return null;
} else if (cumulatedNumberOfWays < 0 || cumulatedNumberOfWays > MAXIMUM_ZOOM_TABLE_OBJECTS) {
LOG.warning("invalid cumulated number of ways in row " + row + ' ' + cumulatedNumberOfWays);
if (sMapFileHeader.getMapFileInfo().debugFile) {
LOG.warning(DEBUG_SIGNATURE_BLOCK + mSignatureBlock);
}
return null;
}
zoomTable[row][0] = cumulatedNumberOfPois;
zoomTable[row][1] = cumulatedNumberOfWays;
}
return zoomTable;
}
/*
* (non-Javadoc)
* @see org.oscim.map.reader.IMapDatabase#getMapFileInfo()
*/
@Override
public MapFileInfo getMapInfo() {
if (sMapFileHeader == null) {
throw new IllegalStateException("no map file is currently opened");
}
return sMapFileHeader.getMapFileInfo();
}
/**
* Processes the given number of ways.
*
* @param queryParameters the parameters of the current query.
* @param mapDatabaseCallback the callback which handles the extracted ways.
* @param numberOfWays how many ways should be processed.
* @return true if the ways could be processed successfully, false otherwise.
*/
private boolean processWays(
QueryParameters queryParameters, IMapDatabaseCallback mapDatabaseCallback, int numberOfWays) {
Tag[] tags = null;
Tag[] wayTags = sMapFileHeader.getMapFileInfo().wayTags;
int[] textPos = new int[3];
// float[] labelPosition;
boolean skippedWays = false;
int wayDataBlocks;
// skip string block
int stringsSize = mReadBuffer.readUnsignedInt();
stringOffset = mReadBuffer.getBufferPosition();
mReadBuffer.skipBytes(stringsSize);
for (int elementCounter = numberOfWays; elementCounter != 0; --elementCounter) {
if (mDebugFile) {
// get and check the way signature
mSignatureWay = mReadBuffer.readUTF8EncodedString(SIGNATURE_LENGTH_WAY);
if (!mSignatureWay.startsWith("---WayStart")) {
LOG.warning("invalid way signature: " + mSignatureWay);
LOG.warning(DEBUG_SIGNATURE_BLOCK + mSignatureBlock);
return false;
}
}
if (queryParameters.useTileBitmask) {
elementCounter = mReadBuffer.skipWays(queryParameters.queryTileBitmask, elementCounter);
if (elementCounter == 0) return true;
if (elementCounter < 0) return false;
if (mReadBuffer.lastTagPosition > 0) {
int pos = mReadBuffer.getBufferPosition();
mReadBuffer.setBufferPosition(mReadBuffer.lastTagPosition);
byte numberOfTags = (byte) (mReadBuffer.readByte() & WAY_NUMBER_OF_TAGS_BITMASK);
tags = mReadBuffer.readTags(wayTags, numberOfTags);
if (tags == null) return false;
skippedWays = true;
mReadBuffer.setBufferPosition(pos);
}
} else {
int wayDataSize = mReadBuffer.readUnsignedInt();
if (wayDataSize < 0) {
LOG.warning("invalid way data size: " + wayDataSize);
if (mDebugFile) {
LOG.warning(DEBUG_SIGNATURE_BLOCK + mSignatureBlock);
}
LOG.warning("EEEEEK way... 2");
return false;
}
// ignore the way tile bitmask (2 bytes)
mReadBuffer.skipBytes(2);
}
// get the special byte which encodes multiple flags
byte specialByte = mReadBuffer.readByte();
// bit 1-4 represent the layer
byte layer = (byte) ((specialByte & WAY_LAYER_BITMASK) >>> WAY_LAYER_SHIFT);
// bit 5-8 represent the number of tag IDs
byte numberOfTags = (byte) (specialByte & WAY_NUMBER_OF_TAGS_BITMASK);
boolean changed = skippedWays;
skippedWays = false;
if (numberOfTags != 0) {
tags = mReadBuffer.readTags(wayTags, numberOfTags);
changed = true;
}
if (tags == null) return false;
// get the feature bitmask (1 byte)
byte featureByte = mReadBuffer.readByte();
// bit 1-6 enable optional features
boolean featureWayDoubleDeltaEncoding =
(featureByte & WAY_FEATURE_DOUBLE_DELTA_ENCODING) != 0;
// check if the way has a name
if ((featureByte & WAY_FEATURE_NAME) != 0) {
textPos[0] = mReadBuffer.readUnsignedInt();
String str = mReadBuffer.readUTF8EncodedStringAt(stringOffset + textPos[0]);
// if (changed) {
// Tag[] tmp = tags;
// tags = new Tag[tmp.length + 1];
// System.arraycopy(tmp, 0, tags, 0, tmp.length);
// }
// tags[tags.length - 1] = new Tag(Tag.TAG_KEY_NAME, str,
// false);
} else textPos[0] = -1;
// check if the way has a house number
if ((featureByte & WAY_FEATURE_HOUSE_NUMBER) != 0) {
textPos[1] = mReadBuffer.readUnsignedInt();
} else textPos[1] = -1;
// check if the way has a reference
if ((featureByte & WAY_FEATURE_REF) != 0) textPos[2] = mReadBuffer.readUnsignedInt();
else textPos[2] = -1;
if ((featureByte & WAY_FEATURE_LABEL_POSITION) != 0)
// labelPosition =
readOptionalLabelPosition();
// else
// labelPosition = null;
if ((featureByte & WAY_FEATURE_DATA_BLOCKS_BYTE) != 0) {
wayDataBlocks = mReadBuffer.readUnsignedInt();
if (wayDataBlocks < 1) {
LOG.warning("invalid number of way data blocks: " + wayDataBlocks);
logDebugSignatures();
return false;
}
} else {
wayDataBlocks = 1;
}
for (int wayDataBlock = 0; wayDataBlock < wayDataBlocks; ++wayDataBlock) {
short[] wayLengths = processWayDataBlock(featureWayDoubleDeltaEncoding);
if (wayLengths == null) return false;
// wayDataContainer.textPos = textPos;
int l = wayLengths[0];
boolean closed = mWayNodes[0] == mWayNodes[l - 2] && mWayNodes[1] == mWayNodes[l - 1];
mapDatabaseCallback.renderWay(layer, tags, mWayNodes, wayLengths, closed);
}
}
return true;
}
/**
* Processes the given number of POIs.
*
* @param mapDatabaseCallback 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(IMapDatabaseCallback mapDatabaseCallback, int numberOfPois) {
Tag[] poiTags = sMapFileHeader.getMapFileInfo().poiTags;
Tag[] tags = null;
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.warning("invalid POI signature: " + mSignaturePoi);
LOG.warning(DEBUG_SIGNATURE_BLOCK + mSignatureBlock);
return false;
}
}
// Log.d("MapDatabase", "read POI");
// 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);
// boolean changed = false;
if (numberOfTags != 0) {
tags = mReadBuffer.readTags(poiTags, numberOfTags);
// changed = true;
}
if (tags == null) return false;
// 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) {
// int pos = mReadBuffer.getPositionAndSkip();
String str = mReadBuffer.readUTF8EncodedString();
Tag[] tmp = tags;
tags = new Tag[tmp.length + 1];
System.arraycopy(tmp, 0, tags, 0, tmp.length);
tags[tags.length - 1] = new Tag("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())));
}
mapDatabaseCallback.renderPointOfInterest(layer, tags, latitude, longitude);
}
return true;
}