package com.vci.server.base.persistence.history;

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

import org.hibernate.HibernateException;
import org.hibernate.usertype.UserType;

public class EnumOperationType<E extends Enum<E>> implements UserType {

	private Class<E> clazz = null;
	private static final int[] sqlTypes = {Types.VARCHAR};
	
	public EnumOperationType(Class<E> c) {
		clazz = c;
	}
	
	public int[] sqlTypes() {
		return sqlTypes;
	}
	
	public Class returnedClass() {
		return clazz;
	}
	
	public boolean equals(Object x, Object y) throws HibernateException {
		if (x == y) {
			return true;
		}
		if (x == null || y == null) {
			return false;
		} else {
			return x.equals(y);
		}
	}
	
	public int hashCode(Object x) throws HibernateException {
		return x.hashCode();
	}

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

	public Object deepCopy(Object value) throws HibernateException {
		return value;
	}

	public Serializable disassemble(Object value) throws HibernateException {
		// TODO Auto-generated method stub
		return (Serializable)value;
	}

	public boolean isMutable() {
		return false;
	}

	public Object nullSafeGet(ResultSet rs, String[] names, Object owner)
			throws HibernateException, SQLException {
		String value = rs.getString(names[0]);
		Object result = null;
		if (!rs.wasNull()) {
			result = Enum.valueOf(clazz, value);
		}
		return result;
	}

	public void nullSafeSet(PreparedStatement st, Object value, int index)
			throws HibernateException, SQLException {
		if (null == value) {
			st.setNull(index, Types.VARCHAR);
		} else {
			st.setString(index, ((Enum)value).name());
		}
	}

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