com.datastax.dse.driver.internal.core.data.geometry.WkbSerializationProxy Maven / Gradle / Ivy

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.datastax.dse.driver.internal.core.data.geometry;

import com.datastax.dse.driver.api.core.data.geometry.LineString;
import com.datastax.dse.driver.api.core.data.geometry.Point;
import com.datastax.dse.driver.api.core.data.geometry.Polygon;
import com.datastax.oss.protocol.internal.util.Bytes;
import java.io.Serializable;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import net.jcip.annotations.Immutable;

/**
 * A thin wrapper around a Well-Known Binary byte sequence, that gets substituted for {@link
 * DefaultGeometry} instances during the serialization / deserialization process. This allows
 * immutable geometry classes.
 */
@Immutable
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);
    }
  }
}