ResultSet
to trim strings returned by the
* getString()
and getObject()
methods.
*
*
* Usage Example:
* This example shows how to decorate ResultSets so processing continues as
* normal but all Strings are trimmed before being returned from the
* ResultSet
.
*
* ResultSet rs = // somehow get a ResultSet; * * // Substitute wrapped ResultSet with additional behavior for real ResultSet * rs = StringTrimmedResultSet.wrap(rs); * * // Pass wrapped ResultSet to processor * List list = new BasicRowProcessor().toBeanList(rs); **/ public class StringTrimmedResultSet implements InvocationHandler { /** * The wrapped result. */ private final ResultSet rs; /** * Constructs a new instance of
StringTrimmedResultSet
* to wrap the specified ResultSet
.
* @param rs ResultSet to wrap
*/
public StringTrimmedResultSet(ResultSet rs) {
super();
this.rs = rs;
}
/**
* Intercept calls to the getString()
and
* getObject()
methods and trim any Strings before they're
* returned.
*
* @throws Throwable
* @see java.lang.reflect.InvocationHandler#invoke(java.lang.Object, java.lang.reflect.Method, java.lang.Object[])
*/
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
Object result = method.invoke(this.rs, args);
if (method.getName().equals("getObject")
|| method.getName().equals("getString")) {
if (result instanceof String) {
result = ((String) result).trim();
}
}
return result;
}
}