141 lines
3.8 KiB
Java
141 lines
3.8 KiB
Java
/**
|
|
* Container for link between two Osm nodes
|
|
*
|
|
* @author ab
|
|
*/
|
|
package btools.mapaccess;
|
|
|
|
|
|
|
|
public final class OsmTransferNode
|
|
{
|
|
/**
|
|
* The description bitmap is mainly the way description
|
|
* used to calculate the costfactor
|
|
*/
|
|
public long descriptionBitmap;
|
|
|
|
public OsmTransferNode next;
|
|
|
|
public int ilon;
|
|
public int ilat;
|
|
public short selev;
|
|
|
|
private static final int BIT_DESC = 1;
|
|
private static final int BIT_ILONHIGH = 2;
|
|
private static final int BIT_ILATHIGH = 4;
|
|
private static final int BIT_STOP = 8;
|
|
|
|
// encode this transfer-node into a byte array
|
|
public static byte[] encode( OsmTransferNode tn )
|
|
{
|
|
long currentDesc = 0;
|
|
int currentILonHigh = 0;
|
|
int currentILatHigh = 0;
|
|
OsmTransferNode n = tn;
|
|
|
|
// first loop to calc size
|
|
int size = 1; // stop-bit
|
|
|
|
while( n != null )
|
|
{
|
|
if( n.descriptionBitmap != currentDesc )
|
|
{
|
|
size += 8;
|
|
currentDesc = n.descriptionBitmap;
|
|
}
|
|
if( ( n.ilon >> 16 ) != currentILonHigh )
|
|
{
|
|
size += 2;
|
|
currentILonHigh = n.ilon >> 16;
|
|
}
|
|
if( (n.ilat >> 16) != currentILatHigh )
|
|
{
|
|
size += 2;
|
|
currentILatHigh = n.ilat >> 16;
|
|
}
|
|
size += 7;
|
|
n = n.next;
|
|
}
|
|
|
|
byte[] ab = new byte[size];
|
|
ByteDataWriter os = new ByteDataWriter( ab );
|
|
|
|
currentDesc = 0;
|
|
currentILonHigh = 0;
|
|
currentILatHigh = 0;
|
|
n = tn;
|
|
while( n != null )
|
|
{
|
|
int mode = 0;
|
|
if( n.descriptionBitmap != currentDesc )
|
|
{
|
|
mode |= BIT_DESC;
|
|
currentDesc = n.descriptionBitmap;
|
|
}
|
|
if( ( n.ilon >> 16 ) != currentILonHigh )
|
|
{
|
|
mode |= BIT_ILONHIGH;
|
|
currentILonHigh = n.ilon >> 16;
|
|
}
|
|
if( (n.ilat >> 16) != currentILatHigh )
|
|
{
|
|
mode |= BIT_ILATHIGH;
|
|
currentILatHigh = n.ilat >> 16;
|
|
}
|
|
os.writeByte( mode);
|
|
if ( (mode & BIT_DESC) != 0 ) os.writeLong( currentDesc );
|
|
if ( (mode & BIT_ILONHIGH) != 0 ) os.writeShort( currentILonHigh );
|
|
if ( (mode & BIT_ILATHIGH) != 0 ) os.writeShort( currentILatHigh );
|
|
os.writeShort( n.ilon );
|
|
os.writeShort( n.ilat );
|
|
os.writeShort( n.selev );
|
|
n = n.next;
|
|
}
|
|
os.writeByte( BIT_STOP );
|
|
return ab;
|
|
}
|
|
|
|
// decode a transfer-node from a byte array
|
|
public static OsmTransferNode decode( byte[] ab )
|
|
{
|
|
ByteDataReader is = new ByteDataReader( ab );
|
|
|
|
OsmTransferNode firstNode = null;
|
|
OsmTransferNode lastNode = null;
|
|
long currentDesc = 0;
|
|
int currentILonHigh = 0;
|
|
int currentILatHigh = 0;
|
|
for(;;)
|
|
{
|
|
byte mode = is.readByte();
|
|
if ( (mode & BIT_STOP ) != 0 ) break;
|
|
|
|
OsmTransferNode n = new OsmTransferNode();
|
|
if ( (mode & BIT_DESC) != 0 ) currentDesc = is.readLong();
|
|
if ( (mode & BIT_ILONHIGH) != 0 ) currentILonHigh = is.readShort();
|
|
if ( (mode & BIT_ILATHIGH) != 0 ) currentILatHigh = is.readShort();
|
|
n.descriptionBitmap = currentDesc;
|
|
int ilon = is.readShort() & 0xffff; ilon |= currentILonHigh << 16;
|
|
int ilat = is.readShort() & 0xffff; ilat |= currentILatHigh << 16;
|
|
n.ilon = ilon;
|
|
n.ilat = ilat;
|
|
n.selev = is.readShort();
|
|
|
|
if ( ilon != n.ilon ) System.out.println( "ilon=" + ilon + " n.ilon=" + n.ilon );
|
|
if ( ilat != n.ilat ) System.out.println( "ilat=" + ilat + " n.ilat=" + n.ilat );
|
|
|
|
if ( lastNode != null )
|
|
{
|
|
lastNode.next = n;
|
|
}
|
|
else
|
|
{
|
|
firstNode = n;
|
|
}
|
|
lastNode = n;
|
|
}
|
|
return firstNode;
|
|
}
|
|
|
|
}
|