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Mongodb support for Querydsl

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/*
 * Copyright 2020 the original author or authors.
 *
 * Licensed 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.querydsl.mongodb.document;

import com.querydsl.core.types.ConstantImpl;
import com.querydsl.core.types.Expression;
import com.querydsl.core.types.dsl.BooleanExpression;
import com.querydsl.core.types.dsl.Expressions;
import com.querydsl.mongodb.MongodbOps;
import java.util.Arrays;

/**
 * Mongodb Document-API-specific operations.
 *
 * @author tiwe
 * @author Mark Paluch
 */
public final class MongodbExpressions {

  private MongodbExpressions() {}

  /**
   * Finds the closest points relative to the given location and orders the results with decreasing
   * proximity
   *
   * @param expr location
   * @param latVal latitude
   * @param longVal longitude
   * @return predicate
   */
  public static BooleanExpression near(Expression expr, double latVal, double longVal) {
    return Expressions.booleanOperation(
        MongodbOps.NEAR, expr, ConstantImpl.create(Arrays.asList(latVal, longVal)));
  }

  /**
   * Finds the closest points relative to the given location on a sphere and orders the results with
   * decreasing proximity
   *
   * @param expr location
   * @param latVal latitude
   * @param longVal longitude
   * @return predicate
   */
  public static BooleanExpression nearSphere(
      Expression expr, double latVal, double longVal) {
    return Expressions.booleanOperation(
        MongodbOps.NEAR_SPHERE, expr, ConstantImpl.create(Arrays.asList(latVal, longVal)));
  }
}