| /******************************************************************************* |
| * Copyright (c) 2008, 2010 VMware Inc. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * VMware Inc. - initial contribution |
| *******************************************************************************/ |
| |
| package org.eclipse.virgo.bundlor.support.propertysubstitution; |
| |
| |
| |
| /** |
| |
| * The sum transformer perhaps a numeric computation (for example adding 3 or subtracting 4) on the input value. |
| |
| * |
| |
| * @author Andy Clement |
| |
| */ |
| |
| final class SumTransformer implements Transformer { |
| |
| |
| |
| private int modifier; |
| |
| |
| |
| SumTransformer(int modifier) { |
| |
| this.modifier = modifier; |
| |
| } |
| |
| |
| |
| @SuppressWarnings("unchecked") |
| |
| public <T> T transform(T input) { |
| |
| Integer n = (Integer) input; |
| |
| return (T) Integer.valueOf(n.intValue() + modifier); |
| |
| } |
| |
| |
| |
| public String toString() { |
| |
| StringBuffer sb = new StringBuffer(); |
| |
| sb.append(modifier > 0 ? "+" : ""); |
| |
| sb.append(Integer.toString(modifier)); |
| |
| return sb.toString(); |
| |
| } |
| |
| |
| |
| } |
