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1
14 package org.wings;
15
16 import org.apache.commons.logging.Log;
17 import org.apache.commons.logging.LogFactory;
18
19 import java.io.FilterOutputStream  ;
20 import java.io.OutputStream ;
21 import java.lang.reflect.Constructor ;
22 import java.util.HashMap ;
23
24
28 public class UploadFilterManager {
29 private final transient static Log log = LogFactory.getLog(UploadFilterManager.class);
30
31 private static HashMap filterMappings = new HashMap ();
32
33 public static void registerFilter(String name, Class filter, String errorText) {
34 if (!FilterOutputStream .class.isAssignableFrom(filter))
35 throw new IllegalArgumentException ("class is not a FilterOutputStream!");
36
37 Entry entry = new Entry(filter);
38 entry.errorText = errorText;
39 filterMappings.put(name, entry);
40 }
41
42 public static void registerFilter(String name, Class filter) {
43 registerFilter(name, filter, null);
44 }
45
46 public static Class getFilterClass(String name) {
47 int dividerIndex = name.indexOf(SConstants.UID_DIVIDER);
48 name = name.substring(dividerIndex + 1);
49
50 return (Class ) ((Entry) filterMappings.get(name)).filterClass;
51 }
52
53 public static FilterOutputStream createFilterInstance(String name, OutputStream out) {
54 FilterOutputStream filter = null;
55 try {
56 Entry entry = getFilterEntry(name);
57 if (entry == null)
58 filter = new FilterOutputStream (out);
59 else {
60 Class filterClass = entry.filterClass;
61 if (filterClass != null) {
62 log.info("using " + filterClass.getName() + " for " + name);
63 Constructor constructor = filterClass.getConstructor(new Class []{OutputStream .class});
64 filter = (FilterOutputStream ) constructor.newInstance(new Object []{out});
65 entry.filterInstance = filter;
66 }
67 }
68 } catch (Exception e) {
69 log.fatal("Exception", e);
70 }
71 return filter;
72 }
73
74 public static FilterOutputStream getFilterInstance(String name) {
75 try {
76 Entry entry = getFilterEntry(name);
77 FilterOutputStream filterInstance = entry.filterInstance;
78 return filterInstance;
79 } catch (Exception e) {
80 log.fatal(null, e);
81 return null;
82 }
83 }
84
85 private static Entry getFilterEntry(String name) {
86 int dividerIndex = name.indexOf(SConstants.UID_DIVIDER);
87 name = name.substring(dividerIndex + 1);
88
89 return (Entry) filterMappings.get(name);
90 }
91
92 private static class Entry {
93 public Class filterClass;
94 public FilterOutputStream filterInstance;
95 public String errorText;
96
97
98 public Entry(Class filterClass) {
99 this.filterClass = filterClass;
100 }
101
102
103 public void setInstance(FilterOutputStream filterInstance) {
104 this.filterInstance = filterInstance;
105 }
106 }
107 }
108
109
110 |
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