SimNaoType para hibernate

SimNaoType.java

import java.io.Serializable;
import org.hibernate.annotations.TypeDef;
import org.hibernate.annotations.TypeDefs;
import org.hibernate.dialect.Dialect;
import org.hibernate.type.AbstractSingleColumnStandardBasicType;
import org.hibernate.type.DiscriminatorType;
import org.hibernate.type.PrimitiveType;
import org.hibernate.type.StringType;
import org.hibernate.type.descriptor.java.BooleanTypeDescriptor;
import org.hibernate.type.descriptor.sql.CharTypeDescriptor;

// Para usar colocar essa anotacao na entity
//@TypeDefs({@TypeDef(name = "sim_nao", typeClass = SimNaoType.class) })
public class SimNaoType extends AbstractSingleColumnStandardBasicType<Boolean> implements
    PrimitiveType<Boolean>, DiscriminatorType<Boolean> {
  public static final SimNaoType INSTANCE = new SimNaoType();

  public SimNaoType() {
    super(CharTypeDescriptor.INSTANCE, new BooleanTypeDescriptor('S', 'N'));
  }

  public String getName() {
    return "sim_nao";
  }

  public Class getPrimitiveClass() {
    return Boolean.TYPE;
  }

  public Boolean stringToObject(String xml) throws Exception {
    return (Boolean)this.fromString(xml);
  }

  public Serializable getDefaultValue() {
    return Boolean.FALSE;
  }

  public String objectToSQLString(Boolean value, Dialect dialect) throws Exception {
    return StringType.INSTANCE.objectToSQLString(value ? "S" : "N", dialect);
  }
}