1 /*
2 * Copyright 2004-2006 the Seasar Foundation and the Others.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13 * either express or implied. See the License for the specific language
14 * governing permissions and limitations under the License.
15 */
16 package org.seasar.tuigwaa.util.functor;
17
18 import com.isenshi.util.functor.UnaryFunction;
19
20 public class SubstringFunction implements UnaryFunction {
21
22 private int limit;
23
24 public SubstringFunction(int limit){
25 this.limit = limit;
26 }
27
28 public Object evaluate(Object obj) {
29 if(obj == null){
30 return "";
31 }
32 String str = (String)obj;
33 if(str.length()<limit){
34 return str;
35 }
36 return str.subSequence(0, limit) + "...";
37 }
38 }