|
1
5 package com.opensymphony.webwork.util;
6
7 import com.opensymphony.webwork.ServletActionContext;
8
9 import javax.servlet.jsp.PageContext  ;
10 import java.util.Collection ;
11 import java.util.Map ;
12 import java.util.Set ;
13
14
15
20 public class AttributeMap implements Map {
21
23 protected static final String UNSUPPORTED = "method makes no sense for a simplified map";
24
25
27 Map context;
28
29
31 public AttributeMap(Map context) {
32 this.context = context;
33 }
34
35
37 public boolean isEmpty() {
38 throw new UnsupportedOperationException (UNSUPPORTED);
39 }
40
41 public void clear() {
42 throw new UnsupportedOperationException (UNSUPPORTED);
43 }
44
45 public boolean containsKey(Object key) {
46 return (get(key) != null);
47 }
48
49 public boolean containsValue(Object value) {
50 throw new UnsupportedOperationException (UNSUPPORTED);
51 }
52
53 public Set entrySet() {
54 throw new UnsupportedOperationException (UNSUPPORTED);
55 }
56
57 public Object get(Object key) {
58 PageContext pc = getPageContext();
59
60 if (pc == null) {
61 Map request = (Map ) context.get("request");
62 Map session = (Map ) context.get("session");
63 Map application = (Map ) context.get("application");
64
65 if ((request != null) && (request.get(key) != null)) {
66 return request.get(key);
67 } else if ((session != null) && (session.get(key) != null)) {
68 return session.get(key);
69 } else if ((application != null) && (application.get(key) != null)) {
70 return application.get(key);
71 }
72 } else {
73 return pc.findAttribute(key.toString());
74 }
75
76 return null;
77 }
78
79 public Set keySet() {
80 throw new UnsupportedOperationException (UNSUPPORTED);
81 }
82
83 public Object put(Object key, Object value) {
84 throw new UnsupportedOperationException (UNSUPPORTED);
85 }
86
87 public void putAll(Map t) {
88 throw new UnsupportedOperationException (UNSUPPORTED);
89 }
90
91 public Object remove(Object key) {
92 throw new UnsupportedOperationException (UNSUPPORTED);
93 }
94
95 public int size() {
96 throw new UnsupportedOperationException (UNSUPPORTED);
97 }
98
99 public Collection values() {
100 throw new UnsupportedOperationException (UNSUPPORTED);
101 }
102
103 private PageContext getPageContext() {
104 return (PageContext ) context.get(ServletActionContext.PAGE_CONTEXT);
105 }
106 }
107 |
Popular Tags |
Java API By Example, From Geeks To Geeks.