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A driver for DataStax Enterprise (DSE) and Apache Cassandra 1.2+ clusters that works exclusively with the Cassandra Query Language version 3 (CQL3) and Cassandra's binary protocol, supporting DSE-specific features such as geospatial types, DSE Graph and DSE authentication.

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/*
 * 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.graph;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import java.io.IOException;
import java.util.Map;

/**
 * Base class for creating deserializers which parses JSON to a {@code Map} to more easily
 * reconstruct an object.
 */
abstract class AbstractObjectDeserializer extends StdDeserializer {

  protected AbstractObjectDeserializer(final Class clazz) {
    super(clazz);
  }

  @Override
  public T deserialize(
      final JsonParser jsonParser, final DeserializationContext deserializationContext)
      throws IOException, JsonProcessingException {
    jsonParser.nextToken();

    // This will automatically parse all typed stuff.
    @SuppressWarnings("unchecked")
    final Map mapData = deserializationContext.readValue(jsonParser, Map.class);

    return createObject(mapData);
  }

  public abstract T createObject(final Map data);
}