org.immutables.criteria.geode.OqlLiterals Maven / Gradle / Ivy

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/*
 * Copyright 2020 Immutables Authors and Contributors
 *
 * 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 org.immutables.criteria.geode;

import com.google.common.collect.ImmutableSet;

import java.text.SimpleDateFormat;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.Date;
import java.util.Objects;
import java.util.Set;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

/**
 * Helper class to convert java objects to
 * Geode OQL literals like dates, iterables, numbers etc.
 * Using bind variables is preferred however in some circumstances like
 * Continuous Querying
 * it is not possible.
 *
 * @see Implementing Continuous Querying
 */
final class OqlLiterals {

  private OqlLiterals() {}

  /**
   * Convert java object to Geode OQL literal
   */
  static String fromObject(Object value) {
    if (value == null) {
      return Objects.toString(null);
    } else if (value instanceof CharSequence) {
      return charSequence((CharSequence) value);
    } else if (value instanceof Pattern) {
      return pattern((Pattern) value);
    } else if (value instanceof Iterable) {
      return iterable((Iterable) value);
    } else if (value.getClass().isEnum()) {
      return fromEnum((Enum) value);
    } else if (value instanceof LocalDate) {
      return localDate((LocalDate) value);
    } else if (value instanceof LocalDateTime) {
      return localDateTime((LocalDateTime) value);
    } else if (value instanceof Instant) {
      return instant((Instant) value);
    } else if (value instanceof Date) {
      return date((Date) value);
    } else if (value instanceof Long) {
      return longValue((Long) value);
    }

    // probably string is best representation in OQL (without bind variables)
    return Objects.toString(value);
  }

  private static String iterable(Iterable value) {
    Set