/**
* Populate the geometry data from the bytes
*
* @param bytes
*/
public void fromBytes(byte[] bytes) {
this.bytes = bytes;
ByteReader reader = new ByteReader(bytes);
// Get 2 bytes as the magic number and validate
String magic = null;
try {
magic = reader.readString(2);
} catch (UnsupportedEncodingException e) {
throw new GeoPackageException(
"Unexpected GeoPackage Geometry magic number character encoding: Expected: "
+ GeoPackageConstants.GEO_PACKAGE_GEOMETRY_MAGIC_NUMBER);
}
if (!magic.equals(GeoPackageConstants.GEO_PACKAGE_GEOMETRY_MAGIC_NUMBER)) {
throw new GeoPackageException(
"Unexpected GeoPackage Geometry magic number: "
+ magic
+ ", Expected: "
+ GeoPackageConstants.GEO_PACKAGE_GEOMETRY_MAGIC_NUMBER);
}
// Get a byte as the version and validate, value of 0 = version 1
byte version = reader.readByte();
if (version != GeoPackageConstants.GEO_PACKAGE_GEOMETRY_VERSION_1) {
throw new GeoPackageException(
"Unexpected GeoPackage Geometry version: "
+ version
+ ", Expected: "
+ GeoPackageConstants.GEO_PACKAGE_GEOMETRY_VERSION_1);
}
// Get a flags byte and then read the flag values
byte flags = reader.readByte();
int envelopeIndicator = readFlags(flags);
reader.setByteOrder(byteOrder);
// Read the 5th - 8th bytes as the srs id
srsId = reader.readInt();
// Read the envelope
envelope = readEnvelope(envelopeIndicator, reader);
// Save off where the WKB bytes start
wkbGeometryIndex = reader.getNextByte();
// Read the Well-Known Binary Geometry if not marked as empty
if (!empty) {
geometry = WkbGeometryReader.readGeometry(reader);
}
}
