EDIT

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.hibernate;

import java.io.Serializable;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Types;

import org.apache.log4j.Logger;

import org.hibernate.HibernateException;

import org.hibernate.engine.spi.SessionImplementor;

import org.hibernate.type.StandardBasicTypes;

import org.hibernate.usertype.UserType;

import org.jadira.usertype.dateandtime.shared.spi.AbstractUserType;

import eu.etaxonomy.cdm.model.molecular.SingleReadAlignment.Shift;

/**

 * Hibernate user type for arrays of int(eger).

 * @author a.mueller

 * @since 03.12.2014

 */

public class ShiftUserType  extends AbstractUserType implements UserType {

	private static final long serialVersionUID = -2507496252811101383L;

	@SuppressWarnings("unused")

	private static final Logger logger = Logger.getLogger(ShiftUserType.class);

	private static final String SHIFT_SEPARATOR = ";";

	private static final String ATTR_SEPARATOR = ",";

	private static final int[] SQL_TYPES = { Types.CLOB };

	@Override

	public Object deepCopy(Object o) throws HibernateException {

		return o;  //do we need more?

	}

	@Override

	public Serializable disassemble(Object value) throws HibernateException {

		if(value == null) {

			return null;

		} else {

			Shift[] ints = (Shift[]) value;

		    String result = "";

		    for (Shift shift : ints){

		    	if (shift != null){  //null should never happen, but to be on the safe side

		    	    result += SHIFT_SEPARATOR + String.valueOf(shift.position);

		    	    result += ATTR_SEPARATOR + String.valueOf(shift.shift);

		    	}

		    }

		    if (result.length() > 0){

		    	result = result.substring(1);

		    }

		    return result;

		}

	}

	@Override

	public Shift[] nullSafeGet(ResultSet rs, String[] names, SessionImplementor session, Object owner)

			throws HibernateException, SQLException {

        String val = (String) StandardBasicTypes.STRING.nullSafeGet(rs, names, session, owner);

		if(val == null) {

			return null;

		} else {

            try {

            	Shift[] result = nullSafeGet(val);

			    return result;

		    } catch (IllegalArgumentException e) {

			    throw new HibernateException(e);

		    }

		}

	}

	protected Shift[] nullSafeGet(String val) {

		if (val.length() == 0){

			return new Shift[0];

		}else{

			String[] splits = val.split(SHIFT_SEPARATOR);

			Shift[] result = new Shift[splits.length];

			for (int i = 0; i< splits.length ; i++){

				result[i] = new Shift();

				String[] split = splits[i].split(ATTR_SEPARATOR);

				result[i].position = Integer.valueOf(split[0]);

				result[i].shift = Integer.valueOf(split[1]);

			}

			return result;

		}

	}

	@Override

	public void nullSafeSet(PreparedStatement statement, Object value, int index, SessionImplementor session)

			throws HibernateException, SQLException {

		if (value == null) {

            StandardBasicTypes.STRING.nullSafeSet(statement, value, index, session);

        } else {

        	String str = (String)disassemble(value);

            StandardBasicTypes.STRING.nullSafeSet(statement, str, index, session);

        }

	}

	@Override

	public Class<?> returnedClass() {

		return Shift[].class;

	}

	@Override

	public int[] sqlTypes() {

		return SQL_TYPES;

	}

}