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Tooling for reactive Domain-Driven Design projects that are highly concurrent. Includes compute grid, actor caching, spaces, cross-node cluster messaging, CQRS, and Event Sourcing support.

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// Copyright © 2012-2020 VLINGO LABS. All rights reserved.
//
// This Source Code Form is subject to the terms of the
// Mozilla Public License, v. 2.0. If a copy of the MPL
// was not distributed with this file, You can obtain
// one at https://mozilla.org/MPL/2.0/.

package io.vlingo.lattice.query;

import io.vlingo.lattice.model.CompletionTranslator;
import io.vlingo.symbio.store.object.QueryExpression;

/**
 * The elements used in the attempted {@code queryAll()} or {@code queryObject()}.
   * @param  the type of the StateObject being queried
   * @param  the type of the outcome of the query
   * @param  the final result, being a {@code S} or {@code List}
 */
public class QueryAttempt {
  public enum Cardinality { All, Object };

  public final Cardinality cardinality;
  public final CompletionTranslator completionTranslator;
  public final QueryExpression query;
  public final Class stateObjectType;

  @SuppressWarnings({ "rawtypes", "unchecked" })
  public static  QueryAttempt from(final Object attempt) {
    final QueryAttempt typed = (QueryAttempt) attempt;
    return typed;
  }

  public static  QueryAttempt with(final Cardinality cardinality, final Class stateObjectType, final QueryExpression query, final CompletionTranslator completionTranslator) {
    return new QueryAttempt<>(cardinality, stateObjectType, query, completionTranslator);
  }

  public QueryAttempt(final Cardinality cardinality, final Class stateObjectType, final QueryExpression query, final CompletionTranslator completionTranslator) {
    this.cardinality = cardinality;
    this.stateObjectType = stateObjectType;
    this.query = query;
    this.completionTranslator = completionTranslator;
  }
}