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/**
 * Copyright 2015 Smoke Turner, LLC.
 *
 * 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.smoketurner.notification.application.core;

import io.dropwizard.util.Duration;
import java.util.Objects;
import javax.annotation.concurrent.Immutable;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.MoreObjects;
import com.google.common.base.Optional;

@Immutable
public final class Rule {

  private final Integer maxSize;
  private final Duration maxDuration;
  private final String matchOn;

  /**
   * Constructor
   *
   * @param maxSize Maximum number of notifications to include in a roll-up
   * @param maxDuration Maximum time duration between the first and last notifications in a roll-up
   * @param matchOn Group notifications by a specific category
   */
  @JsonCreator
  public Rule(@JsonProperty("max-size") final Optional maxSize,
      @JsonProperty("max-duration") final Optional maxDuration,
      @JsonProperty("match-on") final Optional matchOn) {
    this.maxSize = maxSize.orNull();
    this.maxDuration = maxDuration.orNull();
    this.matchOn = matchOn.orNull();
  }

  @JsonProperty("max-size")
  public Optional getMaxSize() {
    return Optional.fromNullable(maxSize);
  }

  @JsonProperty("max-duration")
  public Optional getMaxDuration() {
    return Optional.fromNullable(maxDuration);
  }

  @JsonProperty("match-on")
  public Optional getMatchOn() {
    return Optional.fromNullable(matchOn);
  }

  @Override
  public boolean equals(final Object obj) {
    if (this == obj) {
      return true;
    }
    if ((obj == null) || (getClass() != obj.getClass())) {
      return false;
    }

    final Rule other = (Rule) obj;
    return Objects.equals(maxSize, other.maxSize) && Objects.equals(maxDuration, other.maxDuration)
        && Objects.equals(matchOn, other.matchOn);
  }

  @Override
  public int hashCode() {
    return Objects.hash(maxSize, maxDuration, matchOn);
  }

  @Override
  public String toString() {
    return MoreObjects.toStringHelper(this).add("maxSize", maxSize).add("maxDuration", maxDuration)
        .add("matchOn", matchOn).toString();
  }
}