UnitUserType.java

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package cedar.hepdata.db;

import cedar.hepdata.util.*;

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;

import org.apache.log4j.*;


public class UnitUserType implements UserType {
    static Logger log = Logger.getLogger(UnitUserType.class);

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

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

    public Class returnedClass() {
        return Unit.class;
    }

    public Object nullSafeGet(ResultSet resultSet, String[] names, Object owner)
        throws HibernateException, SQLException {
        String unitstr = resultSet.getString(names[0]);
        Unit result = new Unit();
        log.debug("Unit string: " + unitstr);
        if (!resultSet.wasNull()) {
            try {
                result.fromString(unitstr);
            } catch (HDUnitException e) {
                log.error("Problem converting stored string to Unit: " + e);
            }
        }
        return result;
    }

    public void nullSafeSet(PreparedStatement preparedStatement, Object value, int index)
        throws HibernateException, SQLException {
        if (null == value) {
            preparedStatement.setNull(index, Types.VARCHAR);
        } else {
            Unit theunit = (Unit) value;
            preparedStatement.setString(index, theunit.toString());
        }
    }

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

    public boolean isMutable() {
        return false;
    }

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

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

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

    public int hashCode(Object x) throws HibernateException {
        return x.hashCode();
    }

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

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