/**
* Read the envelope based upon the indicator value
*
* @param envelopeIndicator
* @param reader
* @return
*/
private GeometryEnvelope readEnvelope(int envelopeIndicator, ByteReader reader) {
GeometryEnvelope envelope = null;
if (envelopeIndicator > 0) {
// Read x and y values and create envelope
double minX = reader.readDouble();
double maxX = reader.readDouble();
double minY = reader.readDouble();
double maxY = reader.readDouble();
boolean hasZ = false;
Double minZ = null;
Double maxZ = null;
boolean hasM = false;
Double minM = null;
Double maxM = null;
// Read z values
if (envelopeIndicator == 2 || envelopeIndicator == 4) {
hasZ = true;
minZ = reader.readDouble();
maxZ = reader.readDouble();
}
// Read m values
if (envelopeIndicator == 3 || envelopeIndicator == 4) {
hasM = true;
minM = reader.readDouble();
maxM = reader.readDouble();
}
envelope = new GeometryEnvelope(hasZ, hasM);
envelope.setMinX(minX);
envelope.setMaxX(maxX);
envelope.setMinY(minY);
envelope.setMaxY(maxY);
if (hasZ) {
envelope.setMinZ(minZ);
envelope.setMaxZ(maxZ);
}
if (hasM) {
envelope.setMinM(minM);
envelope.setMaxM(maxM);
}
}
return envelope;
}
