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Ledger Sync Consumer Common Module

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package org.cardanofoundation.explorer.consumercommon.entity;

import org.cardanofoundation.explorer.consumercommon.validation.Hash32Type;
import java.util.Objects;
import jakarta.persistence.Column;
import jakarta.persistence.ConstraintMode;
import jakarta.persistence.Entity;
import jakarta.persistence.FetchType;
import jakarta.persistence.ForeignKey;
import jakarta.persistence.JoinColumn;
import jakarta.persistence.ManyToOne;
import jakarta.persistence.Table;
import jakarta.persistence.UniqueConstraint;
import lombok.AllArgsConstructor;
import lombok.EqualsAndHashCode;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import lombok.experimental.SuperBuilder;
import org.hibernate.Hibernate;

@Entity
@Table(name = "pool_metadata_ref", uniqueConstraints = {
    @UniqueConstraint(name = "unique_pool_metadata_ref",
        columnNames = {"pool_id", "url", "hash"})
})
@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@SuperBuilder(toBuilder = true)
public class PoolMetadataRef extends BaseEntity {

  @ManyToOne(fetch = FetchType.LAZY, optional = false)
  @JoinColumn(name = "pool_id", nullable = false,
      foreignKey = @ForeignKey(value = ConstraintMode.NO_CONSTRAINT, name = "none"))
  @EqualsAndHashCode.Exclude
  private PoolHash poolHash;

  @Column(name = "url", nullable = false)
  private String url;

  @Column(name = "hash", nullable = false, length = 64)
  @Hash32Type
  private String hash;

  @ManyToOne(fetch = FetchType.LAZY, optional = false)
  @JoinColumn(name = "registered_tx_id", nullable = false,
      foreignKey = @ForeignKey(value = ConstraintMode.NO_CONSTRAINT, name = "none"))
  @EqualsAndHashCode.Exclude
  private Tx registeredTx;

  @Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || Hibernate.getClass(this) != Hibernate.getClass(o)) {
      return false;
    }
    PoolMetadataRef that = (PoolMetadataRef) o;
    return id != null && Objects.equals(id, that.id);
  }

  @Override
  public int hashCode() {
    return getClass().hashCode();
  }
}