import org.hibernate.Hibernate;
import org.hibernate.HibernateException;
import org.hibernate.usertype.*;

public class StringClobType implements UserType {
 public int[] sqlTypes() {
  return new int[] { Types.CLOB };
 }

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

 public boolean equals(Object x, Object y) {
  return (x == y) || (x != null && y != null && (x.equals(y)));
 }

 public Object nullSafeGet(ResultSet rs, String[] names, Object owner) throws HibernateException, SQLException {
  Reader reader = rs.getCharacterStream(names[0]);
  if (reader == null)
   return null;

  StringBuffer sb = new StringBuffer();
  try {
   char[] charbuf = new char[4096];
   for (int i = reader.read(charbuf); i > 0; i = reader.read(charbuf)) {
    sb.append(charbuf, 0, i);
   }
  } catch (IOException e) {
   throw new SQLException(e.getMessage());
  }
  return sb.toString();
 }

 public void nullSafeSet(PreparedStatement st, Object value, int index) throws HibernateException, SQLException {
  if (value != null) {
   StringReader r = new StringReader((String) value);
   st.setCharacterStream(index, r, ((String) value).length());
  } else {
   st.setNull(index, sqlTypes()[0]);
  }
 }

 public Object deepCopy(Object value) {
  if (value == null)
   return null;
  return new String((String) value);
 }

 public boolean isMutable() {
  return false;
 }

 /*
  * @see org.hibernate.usertype.UserType#hashCode(java.lang.Object)
  */
 public int hashCode(Object arg0) throws HibernateException {
  // TODO 自动生成方法存根
  return 0;
 }

 /*
  * @see org.hibernate.usertype.UserType#disassemble(java.lang.Object)
  */
 public Serializable disassemble(Object arg0) throws HibernateException {
  // TODO 自动生成方法存根
  return null;
 }

 /*
  * @see org.hibernate.usertype.UserType#assemble(java.io.Serializable, java.lang.Object)
  */
 public Object assemble(Serializable arg0, Object arg1) throws HibernateException {
  // TODO 自动生成方法存根
  return null;
 }