| // Copyright 2004 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry.util.io; |
| |
| import java.io.IOException; |
| |
| import org.apache.commons.lang.enum.Enum; |
| import org.apache.commons.lang.enum.EnumUtils; |
| |
| /** |
| * Adaptor for {@link Enum} classes. |
| * |
| * @author Howard Lewis Ship |
| * @version $Id$ |
| * @since 3.0 |
| * |
| **/ |
| public class EnumAdaptor implements ISqueezeAdaptor |
| { |
| private static final String PREFIX = "E"; |
| private static final char SEPARATOR = '@'; |
| |
| public String squeeze(DataSqueezer squeezer, Object o) throws IOException |
| { |
| Enum e = (Enum) o; |
| return PREFIX + e.getClass().getName() + SEPARATOR + e.getName(); |
| } |
| |
| public Object unsqueeze(DataSqueezer squeezer, String str) throws IOException |
| { |
| int pos = str.indexOf(SEPARATOR); |
| |
| String className = str.substring(1, pos); |
| String name = str.substring(pos + 1, str.length()); |
| |
| Class enumClass = squeezer.getResolver().findClass(className); |
| |
| try |
| { |
| return EnumUtils.getEnum(enumClass, name); |
| } |
| catch (IllegalArgumentException ex) |
| { |
| throw new IOException(ex.getMessage()); |
| } |
| } |
| |
| public void register(DataSqueezer squeezer) |
| { |
| squeezer.register(PREFIX, Enum.class, this); |
| } |
| |
| } |