package eu.eudat.configurations.typedefinition;

import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SharedSessionContractImplementor;
import org.hibernate.usertype.UserType;

import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.UUID;

/**
 * Currently not used
 */
public class UUIDType implements UserType {
    private final int[] sqlTypesSupported = new int[]{Types.NUMERIC};
    private final String CAST_EXCEPTION_TEXT = " cannot be cast to a java.util.UUID";

    public int[] sqlTypes() {
        return sqlTypesSupported;
    }

    @SuppressWarnings("rawtypes")
    public Class returnedClass() {
        return UUID.class;
    }

    public boolean equals(Object x, Object y) throws HibernateException {
        if (x == null) return y == null;
        else return x.equals(y);
    }

    public int hashCode(Object x) throws HibernateException {
        return x == null ? null : x.hashCode();
    }

    public Object nullSafeGet(ResultSet rs, String[] names, Object owner) throws HibernateException, SQLException {
        assert (names.length == 1);
        Object value = rs.getObject(names[0]);
        if (value == null) return null;

        UUID uuid = UUID.fromString(rs.getString(names[0]));
        return rs.wasNull() ? null : uuid;
    }

    public void nullSafeSet(PreparedStatement st, Object value, int index) throws HibernateException, SQLException {
        if (value == null) {
            st.setNull(index, Types.NULL);
            return;
        }

        if (!UUID.class.isAssignableFrom(value.getClass()))
            throw new HibernateException(value.getClass().toString() + CAST_EXCEPTION_TEXT);

        UUID uuid = (UUID) value;
        st.setObject(index, uuid, Types.OTHER);
    }

    public Object deepCopy(Object value) throws HibernateException {
        if (value == null) return null;
        UUID uuid = (UUID) value;
        return new UUID(uuid.getMostSignificantBits(), uuid.getLeastSignificantBits());
    }

    public boolean isMutable() {
        return false;
    }

    public Serializable disassemble(Object value) throws HibernateException {
        return (Serializable) value;
    }

    public Object assemble(Serializable cached, Object owner) throws HibernateException {
        return cached;
    }

    public Object replace(Object original, Object target, Object owner) throws HibernateException {
        return original;
    }

//	public Object nullSafeGet(ResultSet rs, String[] names, SessionImplementor session, Object owner) 
//			throws HibernateException, SQLException 
//	{
//		return nullSafeGet(rs, names, owner);
//	}
//
//	public void nullSafeSet(PreparedStatement st, Object value, int index, SessionImplementor session) 
//			throws HibernateException, SQLException 
//	{
//		nullSafeSet(st, value, index);
//		
//	}

    public Object nullSafeGet(ResultSet rs, String[] names, SharedSessionContractImplementor session, Object owner)
            throws HibernateException, SQLException {
        return nullSafeGet(rs, names, owner);
    }

    public void nullSafeSet(PreparedStatement st, Object value, int index, SharedSessionContractImplementor session)
            throws HibernateException, SQLException {
        nullSafeSet(st, value, index);
    }
}