AbstractUrlBasedView


1   /*
2    * Copyright 2002-2006 the original author or authors.
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, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.springframework.web.servlet.view;
18  
19  import org.springframework.beans.factory.InitializingBean;
20  
21  /**
22   * Abstract base class for URL-based views. Provides a consistent way of
23   * holding the URL that a View wraps, in the form of a "url" bean property.
24   *
25   * @author Juergen Hoeller
26   * @since 13.12.2003
27   */
28  public abstract class AbstractUrlBasedView extends AbstractView implements InitializingBean {
29  
30      private String   url;
31  
32  
33      /**
34       * Constructor for use as a bean.
35       */
36      protected AbstractUrlBasedView() {
37      }
38  
39      /**
40       * Create a new AbstractUrlBasedView with the given URL.
41       * @param url the URL to forward to
42       */
43      protected AbstractUrlBasedView(String   url) {
44          this.url = url;
45      }
46  
47  
48      /**
49       * Set the URL of the resource that this view wraps.
50       * The URL must be appropriate for the concrete View implementation.
51       */
52      public void setUrl(String   url) {
53          this.url = url;
54      }
55  
56      /**
57       * Return the URL of the resource that this view wraps.
58       */
59      public String   getUrl() {
60          return this.url;
61      }
62  
63      public void afterPropertiesSet() throws Exception   {
64          if (getUrl() == null) {
65              throw new IllegalArgumentException  ("Property 'url' is required");
66          }
67      }
68  
69  
70      public String   toString() {
71          StringBuffer   sb = new StringBuffer  (super.toString());
72          sb.append("; URL [").append(getUrl()).append("]");
73          return sb.toString();
74      }
75  
76  }
77
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