- /*
- * $Header: /home/cvs/jakarta-commons/dbutils/src/java/org/apache/commons/dbutils/wrappers/StringTrimmedResultSet.java,v 1.1 2003/11/02 19:15:23 dgraham Exp $
- * $Revision: 1.1 $
- * $Date: 2003/11/02 19:15:23 $
- *
- * ====================================================================
- *
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2003 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution, if
- * any, must include the following acknowledgement:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgement may appear in the software itself,
- * if and wherever such third-party acknowledgements normally appear.
- *
- * 4. The names "The Jakarta Project", "Commons", and "Apache Software
- * Foundation" must not be used to endorse or promote products derived
- * from this software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
-
- package org.apache.commons.dbutils.wrappers;
-
- import java.lang.reflect.InvocationHandler;
- import java.lang.reflect.Method;
- import java.sql.ResultSet;
-
- import org.apache.commons.dbutils.ProxyFactory;
-
- /**
- * Wraps a <code>ResultSet</code> to trim strings returned by the
- * <code>getString()</code> and <code>getObject()</code> methods.
- *
- * <p>
- * Usage Example:
- * This example shows how to decorate ResultSets so processing continues as
- * normal but all Strings are trimmed before being returned from the
- * <code>ResultSet</code>.
- * </p>
- *
- * <pre>
- * 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 = BasicRowProcessor.instance().toBeanList(rs);
- * </pre>
- *
- * @author <a href="stevencaswell@apache.org">Steven Caswell</a>
- * @author David Graham
- * @version $Id: StringTrimmedResultSet.java,v 1.1 2003/11/02 19:15:23 dgraham Exp $
- */
- public class StringTrimmedResultSet implements InvocationHandler {
-
- /**
- * The factory to create proxies with.
- */
- private static final ProxyFactory factory = ProxyFactory.instance();
-
- /**
- * Wraps the <code>ResultSet</code> in an instance of this class. This is
- * equivalent to:
- * <pre>
- * ProxyFactory.instance().createResultSet(new StringTrimmedResultSet(rs));
- * </pre>
- *
- * @param rs The <code>ResultSet</code> to wrap.
- */
- public static ResultSet wrap(ResultSet rs) {
- return factory.createResultSet(new StringTrimmedResultSet(rs));
- }
-
- /**
- * The wrapped result.
- */
- private final ResultSet rs;
-
- /**
- * Constructs a new instance of <code>StringTrimmedResultSet</code>
- * to wrap the specified <code>ResultSet</code>.
- */
- public StringTrimmedResultSet(ResultSet rs) {
- super();
- this.rs = rs;
- }
-
- /**
- * Intercept calls to the <code>getString()</code> and
- * <code>getObject()</code> 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;
- }
-
- }