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19
20 package org.apache.cayenne.dataview;
21
22 import java.util.*;
23 import java.text.*;
24
25 public class FormatFactory {
26 private Map builders = new HashMap();
27
28 public FormatFactory() {
29 registerBuilder(DecimalFormat.class, new DecimalFormatBuilder());
30 registerBuilder(NumberFormat.class, new DecimalFormatBuilder());
31 registerBuilder(SimpleDateFormat.class, new SimpleDateFormatBuilder());
32 registerBuilder(DateFormat.class, new SimpleDateFormatBuilder());
33 registerBuilder(ChoiceFormat.class, new ChoiceFormatBuilder());
34 registerBuilder(MessageFormat.class, new MessageFormatBuilder());
35 registerBuilder(MapFormat.class, new MapFormatBuilder());
36 }
37
38 public Format createFormat(
39 Class  formatClass,
40 Locale locale,
41 Map parameters) {
42 if (locale == null)
43 locale = Locale.getDefault();
44 Builder builder = getBuilder(formatClass);
45 Format format = builder.create(locale, parameters);
46 return format;
47 }
48
49 public Builder registerBuilder(Class formatClass, Builder builder) {
50 return (Builder)builders.put(formatClass, builder);
51 }
52
53 public Builder unregisterBuilder(Class formatClass) {
54 return (Builder)builders.remove(formatClass);
55 }
56
57 public Builder getBuilder(Class formatClass) {
58 return (Builder)builders.get(formatClass);
59 }
60
61 public static interface Builder {
62 Format create(Locale locale, Map parameters);
63 }
64
65 public static class DecimalFormatBuilder implements Builder {
66 public Format create(Locale locale, Map parameters) {
67 String pattern = (String )parameters.get("pattern");
68 DecimalFormatSymbols sym = new DecimalFormatSymbols(locale);
69 DecimalFormat format = new DecimalFormat();
70 format.setDecimalFormatSymbols(sym);
71 if (pattern != null)
72 format.applyPattern(pattern);
73 return format;
74 }
75 }
76
77 public static class SimpleDateFormatBuilder implements Builder {
78 public Format create(Locale locale, Map parameters) {
79 String pattern = (String )parameters.get("pattern");
80 DateFormatSymbols sym = new DateFormatSymbols(locale);
81 SimpleDateFormat format = new SimpleDateFormat();
82 format.setDateFormatSymbols(sym);
83 if (pattern != null)
84 format.applyPattern(pattern);
85 return format;
86 }
87 }
88
89 public static class ChoiceFormatBuilder implements Builder {
90 public Format create(Locale locale, Map parameters) {
91 String pattern = (String )parameters.get("pattern");
92 ChoiceFormat format = new ChoiceFormat(pattern);
93 return format;
94 }
95 }
96
97 public static class MessageFormatBuilder implements Builder {
98 public Format create(Locale locale, Map parameters) {
99 String pattern = (String )parameters.get("pattern");
100 MessageFormat format = new MessageFormat(pattern, locale);
101 return format;
102 }
103 }
104
105 public static class MapFormatBuilder implements Builder {
106 public Format create(Locale locale, Map parameters) {
107 MapFormat format = new MapFormat();
108 String pattern = (String )parameters.get("pattern");
109 String valueClassName = (String )parameters.get("value-class");
110 String nullValueDesignation = (String )parameters.get("null-value");
111 String entryDelimiter = (String )parameters.get("entry-delimiter");
112 String valueFormatDelimiter = (String )parameters.get("value-delimiter");
113 if (entryDelimiter != null && entryDelimiter.length() > 0)
114 format.setEntryDelimiter(entryDelimiter.charAt(0));
115 if (valueFormatDelimiter != null && valueFormatDelimiter.length() > 0)
116 format.setValueFormatDelimiter(valueFormatDelimiter.charAt(0));
117 if (nullValueDesignation != null)
118 format.setNullValueDesignation(nullValueDesignation);
119 Class valueClass;
120 try {
121 valueClass = Class.forName(valueClassName);
122 format.applyPattern(pattern, valueClass);
123 return format;
124 }
125 catch (ClassNotFoundException ex) {
126 throw new IllegalArgumentException ("Value class " + valueClassName + " not found");
127 }
128 }
129 }
130 }
131 |
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