Added pbf-parser + mapcreation-scripts

misc/pbfparser/BPbfFieldDecoder.java

@@ -0,0 +1,85 @@
+package btools.mapcreator;
+
+import java.util.Date;
+
+import org.openstreetmap.osmosis.osmbinary.Osmformat;
+
+/**
+ * Manages decoding of the lower level PBF data structures.
+ * <p/>
+ * @author Brett Henderson
+ * <p/>
+ */
+public class BPbfFieldDecoder
+{
+    private static final double COORDINATE_SCALING_FACTOR = 0.000000001;
+    private String[] strings;
+    private int coordGranularity;
+    private long coordLatitudeOffset;
+    private long coordLongitudeOffset;
+    private int dateGranularity;
+
+    /**
+     * Creates a new instance.
+     * <p/>
+     * @param primitiveBlock The primitive block containing the fields to be decoded.
+     */
+    public BPbfFieldDecoder( Osmformat.PrimitiveBlock primitiveBlock )
+    {
+        this.coordGranularity = primitiveBlock.getGranularity();
+        this.coordLatitudeOffset = primitiveBlock.getLatOffset();
+        this.coordLongitudeOffset = primitiveBlock.getLonOffset();
+        this.dateGranularity = primitiveBlock.getDateGranularity();
+
+        Osmformat.StringTable stringTable = primitiveBlock.getStringtable();
+        strings = new String[stringTable.getSCount()];
+        for (int i = 0; i < strings.length; i++)
+        {
+            strings[i] = stringTable.getS(i).toStringUtf8();
+        }
+    }
+
+    /**
+     * Decodes a raw latitude value into degrees.
+     * <p/>
+     * @param rawLatitude The PBF encoded value.
+     * @return The latitude in degrees.
+     */
+    public double decodeLatitude( long rawLatitude )
+    {
+        return COORDINATE_SCALING_FACTOR * (coordLatitudeOffset + (coordGranularity * rawLatitude));
+    }
+
+    /**
+     * Decodes a raw longitude value into degrees.
+     * <p/>
+     * @param rawLongitude The PBF encoded value.
+     * @return The longitude in degrees.
+     */
+    public double decodeLongitude( long rawLongitude )
+    {
+        return COORDINATE_SCALING_FACTOR * (coordLongitudeOffset + (coordGranularity * rawLongitude));
+    }
+
+    /**
+     * Decodes a raw timestamp value into a Date.
+     * <p/>
+     * @param rawTimestamp The PBF encoded timestamp.
+     * @return The timestamp as a Date.
+     */
+    public Date decodeTimestamp( long rawTimestamp )
+    {
+        return new Date(dateGranularity * rawTimestamp);
+    }
+
+    /**
+     * Decodes a raw string into a String.
+     * <p/>
+     * @param rawString The PBF encoding string.
+     * @return The string as a String.
+     */
+    public String decodeString( int rawString )
+    {
+        return strings[rawString];
+    }
+}