com.vmware.ovsdb.protocol.operation.result.deserializer.OperationResultDeserializer 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.result.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.vmware.ovsdb.jsonrpc.v1.util.JsonUtil;
import com.vmware.ovsdb.protocol.operation.notation.Row;
import com.vmware.ovsdb.protocol.operation.notation.Uuid;
import com.vmware.ovsdb.protocol.operation.result.EmptyResult;
import com.vmware.ovsdb.protocol.operation.result.ErrorResult;
import com.vmware.ovsdb.protocol.operation.result.InsertResult;
import com.vmware.ovsdb.protocol.operation.result.OperationResult;
import com.vmware.ovsdb.protocol.operation.result.SelectResult;
import com.vmware.ovsdb.protocol.operation.result.UpdateResult;

import java.io.IOException;
import java.util.List;

public class OperationResultDeserializer extends StdDeserializer {

  protected OperationResultDeserializer() {
    this(null);
  }

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

  @Override
  public OperationResult deserialize(JsonParser jp, DeserializationContext ctxt)
      throws IOException {
    JsonNode jsonNode = jp.getCodec().readTree(jp);
    if (jsonNode.size() == 0) {
      return new EmptyResult();
    } else if (jsonNode.size() == 1) {
      // insert result
      JsonNode result = jsonNode.get("uuid");
      if (result != null) {
        return new InsertResult(JsonUtil.treeToValueNoException(result, Uuid.class));
      }
      // select result
      result = jsonNode.get("rows");
      if (result != null) {
        return new SelectResult(
            JsonUtil.treeToValueNoException(result, new TypeReference>() {
            }));
      }
      // update/mutate/delete result
      result = jsonNode.get("count");
      if (result != null) {
        return new UpdateResult(result.asLong());
      }
      // error
      result = jsonNode.get("error");
      if (result != null) {
        return new ErrorResult(result.asText(), null);
      }
    } else if (jsonNode.size() == 2) {
      JsonNode errorNode = jsonNode.get("error");
      JsonNode detailsNode = jsonNode.get("details");
      if (errorNode != null && detailsNode != null) {
        return new ErrorResult(errorNode.asText(), detailsNode.asText());
      }
    }
    throw new IOException(jsonNode + " is not a valid operation result");
  }
}