com.vmware.ovsdb.protocol.operation.notation.deserializer.SetDeserializer Maven / Gradle / Ivy

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/*
 * Copyright (c) 2018 VMware, Inc. All Rights Reserved.
 *
 * This product is licensed to you under the BSD-2 license (the "License").
 * You may not use this product except in compliance with the BSD-2 License.
 *
 * This product may include a number of subcomponents with separate copyright
 * notices and license terms. Your use of these subcomponents is subject to the
 * terms and conditions of the subcomponent's license, as noted in the LICENSE
 * file.
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

package com.vmware.ovsdb.protocol.operation.notation.deserializer;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.vmware.ovsdb.jsonrpc.v1.util.JsonUtil;
import com.vmware.ovsdb.protocol.operation.notation.Atom;
import com.vmware.ovsdb.protocol.operation.notation.Set;
import com.vmware.ovsdb.protocol.util.OvsdbConstant;

import java.io.IOException;

public class SetDeserializer extends StdDeserializer {

  protected SetDeserializer() {
    this(null);
  }

  protected SetDeserializer(Class vc) {
    super(vc);
  }

  @Override
  public Set deserialize(
      JsonParser jp, DeserializationContext ctxt
  ) throws IOException {
    JsonNode jsonNode = jp.getCodec().readTree(jp);
    // An  that represents a set with exactly one element
    if (jsonNode.isValueNode()) {
      JsonUtil.treeToValue(jsonNode, Atom.class);
      return Set.of(JsonUtil.treeToValue(jsonNode, Atom.class));
    }
    ArrayNode arrayNode = (ArrayNode) jsonNode;
    if (arrayNode.size() != 2) {
      throw new IOException(
          " should be a 2-element JSON array. Found "
              + arrayNode.size() + " elements");
    }

    if (!OvsdbConstant.SET.equals(arrayNode.get(0).asText())) {
      // This may be a 
      if (OvsdbConstant.UUID.equals(arrayNode.get(0).asText())) {
        return Set.of(JsonUtil.treeToValue(jsonNode, Atom.class));
      }
      throw new IOException(
          "First element of  should be \"" + OvsdbConstant.SET
              + "\"");
    }

    java.util.Set atoms = JsonUtil.treeToValueNoException(
        arrayNode.get(1),
        new TypeReference>() {}
    );
    return new Set(atoms);
  }
}