# DynamoDB entity class skeleton

package org.example.tests.model;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.json.JsonMapper;
import software.amazon.awssdk.enhanced.dynamodb.mapper.annotations.DynamoDbAttribute;
import software.amazon.awssdk.enhanced.dynamodb.mapper.annotations.DynamoDbBean;
import software.amazon.awssdk.enhanced.dynamodb.mapper.annotations.DynamoDbPartitionKey;
import software.amazon.awssdk.enhanced.dynamodb.mapper.annotations.DynamoDbSecondaryPartitionKey;
import software.amazon.awssdk.enhanced.dynamodb.mapper.annotations.DynamoDbSecondarySortKey;
import software.amazon.awssdk.enhanced.dynamodb.mapper.annotations.DynamoDbSortKey;

import java.util.Objects;

@DynamoDbBean
public class MovieActor implements Comparable<MovieActor> {

	private String movieName;

	private String actorName;

	private String actingAward;

	private Integer actingYear;

	private String actingSchoolName;

	@DynamoDbPartitionKey
	@DynamoDbAttribute("movie")
	public String getMovieName() {
		return movieName;
	}

	public void setMovieName(String movieName) {
		this.movieName = movieName;
	}

	@DynamoDbSortKey
	@DynamoDbAttribute("actor")
	public String getActorName() {
		return actorName;
	}

	public void setActorName(String actorName) {
		this.actorName = actorName;
	}

	@DynamoDbSecondaryPartitionKey(indexNames = "acting_award_year")
	@DynamoDbAttribute("actingaward")
	public String getActingAward() {
		return actingAward;
	}

	public void setActingAward(String actingAward) {
		this.actingAward = actingAward;
	}

	@DynamoDbSecondarySortKey(
		indexNames = {
			"acting_award_year",
			"movie_year"
		}
	)
	@DynamoDbAttribute("actingyear")
	public Integer getActingYear() {
		return actingYear;
	}

	public void setActingYear(Integer actingYear) {
		this.actingYear = actingYear;
	}

	@DynamoDbAttribute("actingschoolname")
	public String getActingSchoolName() {
		return actingSchoolName;
	}

	public void setActingSchoolName(String actingSchoolName) {
		this.actingSchoolName = actingSchoolName;
	}

	@Override
	public int compareTo(MovieActor o) {
		if (this.movieName.compareTo(o.movieName) != 0){
			return this.movieName.compareTo(o.movieName);
		} else {
			return this.actorName.compareTo(o.actorName);
		}
	}

	@Override
	public boolean equals(Object o) {
		if (this == o) return true;
		if (o == null || getClass() != o.getClass()) return false;
		MovieActor that = (MovieActor) o;
		return Objects.equals(movieName, that.movieName) && Objects.equals(actorName, that.actorName) && Objects.equals(actingAward, that.actingAward) && Objects.equals(actingYear, that.actingYear) && Objects.equals(actingSchoolName, that.actingSchoolName);
	}

	@Override
	public int hashCode() {
		return Objects.hash(
			movieName,
			actorName,
			actingAward,
			actingYear,
			actingSchoolName
		);
	}

	@Override
	public String toString() {
		try {
			return new JsonMapper().writeValueAsString(this);
		} catch (JsonProcessingException ignore) {
			return "null";
		}
	}
}

Origin: https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/ddb-en-client-use-multirecord.html#id=ddb-en-client-use-multirecord-query-example