com.datastax.driver.dse.geometry.WkbSerializationProxy Maven / Gradle / Ivy
/*
* Copyright DataStax, Inc.
*
* This software can be used solely with DataStax Enterprise. Please consult the license at
* http://www.datastax.com/terms/datastax-dse-driver-license-terms
*/
package com.datastax.driver.dse.geometry;
import com.datastax.driver.core.utils.Bytes;
import java.io.Serializable;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
/**
* A thin wrapper around a Well-Known Binary byte sequence, that gets substituted for {@link
* Geometry} instances during the serialization / deserialization process. This allows immutable
* geometry classes.
*/
class WkbSerializationProxy implements Serializable {
private static final long serialVersionUID = 1L;
private final byte[] wkb;
WkbSerializationProxy(ByteBuffer wkb) {
this.wkb = Bytes.getArray(wkb);
}
private Object readResolve() {
ByteBuffer buffer = ByteBuffer.wrap(wkb).order(ByteOrder.nativeOrder());
int type = buffer.getInt(1);
if (type == 1) return Point.fromWellKnownBinary(buffer);
else if (type == 2) return LineString.fromWellKnownBinary(buffer);
else if (type == 3) return Polygon.fromWellKnownBinary(buffer);
else
throw new IllegalArgumentException(
"Unknown geospatial type code in serialized form: " + type);
}
}