import java.util.HashSet;
import java.util.Set;

import javax.persistence.Access;
import javax.persistence.AccessType;
import javax.persistence.CollectionTable;
import javax.persistence.Column;
import javax.persistence.ElementCollection;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;


@Entity
@Access(AccessType.FIELD)
@Table(name = "PCY_M_PARENT_CHILD_CD")

public class ParentChildCd {

	@Id
	@Column(name = "CODE", nullable = false, length = 50)
	@Size(max = 50)
	private String code;

	public String getCode() {
		return code;
	}

	public void setCode(String __value) { // NOSONAR
		this.code = __value;
	}

	@Column(name = "ACTIVE", nullable = false)
	@NotNull
	private boolean active;

	public boolean isActive() {
		return active;
	}

	public void setActive(boolean __value) { // NOSONAR
		this.active = __value;
	}

	@Column(name = "PARENT", nullable = true)
	private String parent;

	public String getParent() {
		return parent;
	}

	public void setParent(String __value) {
		this.parent = __value;
	}

	@Column(name = "code", nullable = true)
	@ElementCollection(fetch = FetchType.EAGER)
	@CollectionTable(name = "PCY_M_PARENT_CHILD_CD", joinColumns = { @JoinColumn(name = "PARENT", referencedColumnName = "code") })
	private Set<String> children = new HashSet<String>();

	public Set<String> getChildren() {
		return children;
	}

	public void setChildren(Set<String> __value) {
		this.children = __value;
	}

	public boolean equals(Object obj) {
		return obj == this || (obj instanceof ParentChildCd && getCode() != null && getCode().equals(((ParentChildCd) obj).getCode()));
	}

	public int hashCode() {
		if (getCode() == null)
			return super.hashCode();
		return getCode().hashCode();
	}

}

@Test
	public void testParentChild() {
		ParentChildCd m = new ParentChildCd();
		m.setCode("a");
		m.setParent(null);
		em.persist(m);
		em.flush();
	}