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56 package org.objectstyle.cayenne.dataview;
57
58 import java.util.*;
59 import java.text.*;
60
61 public class FormatFactory {
62 private Map builders = new HashMap();
63
64 public FormatFactory() {
65 registerBuilder(DecimalFormat.class, new DecimalFormatBuilder());
66 registerBuilder(NumberFormat.class, new DecimalFormatBuilder());
67 registerBuilder(SimpleDateFormat.class, new SimpleDateFormatBuilder());
68 registerBuilder(DateFormat.class, new SimpleDateFormatBuilder());
69 registerBuilder(ChoiceFormat.class, new ChoiceFormatBuilder());
70 registerBuilder(MessageFormat.class, new MessageFormatBuilder());
71 registerBuilder(MapFormat.class, new MapFormatBuilder());
72 }
73
74 public Format createFormat(
75 Class  formatClass,
76 Locale locale,
77 Map parameters) {
78 if (locale == null)
79 locale = Locale.getDefault();
80 Builder builder = getBuilder(formatClass);
81 Format format = builder.create(locale, parameters);
82 return format;
83 }
84
85 public Builder registerBuilder(Class formatClass, Builder builder) {
86 return (Builder)builders.put(formatClass, builder);
87 }
88
89 public Builder unregisterBuilder(Class formatClass) {
90 return (Builder)builders.remove(formatClass);
91 }
92
93 public Builder getBuilder(Class formatClass) {
94 return (Builder)builders.get(formatClass);
95 }
96
97 public static interface Builder {
98 Format create(Locale locale, Map parameters);
99 }
100
101 public static class DecimalFormatBuilder implements Builder {
102 public Format create(Locale locale, Map parameters) {
103 String pattern = (String )parameters.get("pattern");
104 DecimalFormatSymbols sym = new DecimalFormatSymbols(locale);
105 DecimalFormat format = new DecimalFormat();
106 format.setDecimalFormatSymbols(sym);
107 if (pattern != null)
108 format.applyPattern(pattern);
109 return format;
110 }
111 }
112
113 public static class SimpleDateFormatBuilder implements Builder {
114 public Format create(Locale locale, Map parameters) {
115 String pattern = (String )parameters.get("pattern");
116 DateFormatSymbols sym = new DateFormatSymbols(locale);
117 SimpleDateFormat format = new SimpleDateFormat();
118 format.setDateFormatSymbols(sym);
119 if (pattern != null)
120 format.applyPattern(pattern);
121 return format;
122 }
123 }
124
125 public static class ChoiceFormatBuilder implements Builder {
126 public Format create(Locale locale, Map parameters) {
127 String pattern = (String )parameters.get("pattern");
128 ChoiceFormat format = new ChoiceFormat(pattern);
129 return format;
130 }
131 }
132
133 public static class MessageFormatBuilder implements Builder {
134 public Format create(Locale locale, Map parameters) {
135 String pattern = (String )parameters.get("pattern");
136 MessageFormat format = new MessageFormat(pattern, locale);
137 return format;
138 }
139 }
140
141 public static class MapFormatBuilder implements Builder {
142 public Format create(Locale locale, Map parameters) {
143 MapFormat format = new MapFormat();
144 String pattern = (String )parameters.get("pattern");
145 String valueClassName = (String )parameters.get("value-class");
146 String nullValueDesignation = (String )parameters.get("null-value");
147 String entryDelimiter = (String )parameters.get("entry-delimiter");
148 String valueFormatDelimiter = (String )parameters.get("value-delimiter");
149 if (entryDelimiter != null && entryDelimiter.length() > 0)
150 format.setEntryDelimiter(entryDelimiter.charAt(0));
151 if (valueFormatDelimiter != null && valueFormatDelimiter.length() > 0)
152 format.setValueFormatDelimiter(valueFormatDelimiter.charAt(0));
153 if (nullValueDesignation != null)
154 format.setNullValueDesignation(nullValueDesignation);
155 Class valueClass;
156 try {
157 valueClass = Class.forName(valueClassName);
158 format.applyPattern(pattern, valueClass);
159 return format;
160 }
161 catch (ClassNotFoundException ex) {
162 throw new IllegalArgumentException ("Value class " + valueClassName + " not found");
163 }
164 }
165 }
166 } |
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