001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.geronimo.common.propertyeditor; 018 019 import java.beans.PropertyEditorSupport; 020 import java.util.Collection; 021 import java.util.StringTokenizer; 022 023 /** 024 * An abstract collection editor. Subclasses should provide the correct type of collection from 025 * the createCollection method and should override setValue to check the type of the value. 026 * 027 * @version $Rev: 476049 $ $Date: 2006-11-16 23:35:17 -0500 (Thu, 16 Nov 2006) $ 028 */ 029 public abstract class AbstractCollectionEditor extends PropertyEditorSupport { 030 031 /** 032 * Concrete subclasses should implement this method to create the correct type of collection. 033 * 034 * @return an empty instance of the type of collection the subclass edits. 035 */ 036 protected abstract Collection createCollection(); 037 038 public void setAsText(String text) { 039 if (text == null) { 040 setValue(null); 041 } else { 042 if (text.startsWith("[")) { 043 text = text.substring(1); 044 } 045 if (text.endsWith("]")) { 046 text = text.substring(0, text.length() - 1); 047 } 048 Collection collection = createCollection(); 049 StringTokenizer stok = new StringTokenizer(text, ","); 050 051 while (stok.hasMoreTokens()) { 052 collection.add(stok.nextToken().trim()); 053 } 054 055 setValue(collection); 056 } 057 } 058 }