|
1
56
57 package org.jdom.contrib.beans;
58
59 import java.lang.reflect.*;
60 import java.util.*;
61
62
67
68 public class StringConverter {
69
70 public static interface Factory {
71 public Object  instantiate(String string);
72 }
73
74 public static class DateFactory implements StringConverter.Factory
75 {
76 public Object instantiate(String string) {
77 return DateUtils.parseDate(string);
78 }
79 }
80
81 protected Map factories = new HashMap();
82
83 public StringConverter() {
84 try {
85 factories.put( Class.forName("java.util.Date"),
86 new DateFactory() );
87 }
88 catch (ClassNotFoundException e) {}
89 }
90
91 public void setFactory(Class type, Factory factory) {
92 factories.put(type, factory);
93 }
94
95 protected static Class [] argString = new Class [] { String .class };
96
97 public Object parse(String string, Class type)
98 {
99 if (type == String .class) {
101 return string;
102 }
103
104 Factory factory = (Factory)factories.get(type);
106 if (factory != null) {
107 return factory.instantiate(string);
108 }
109
110 if (type == short.class) type = Short .class;
112 if (type == int.class) type = Integer .class;
113 if (type == long.class) type = Long .class;
114 if (type == boolean.class) type = Boolean .class;
115 if (type == char.class) type = Character .class;
116 if (type == byte.class) type = Byte .class;
117
118 try {
120 Constructor c = type.getConstructor(argString);
121 if (c != null) {
122 return c.newInstance( new Object [] { string } );
123 }
124 }
125 catch (NoSuchMethodException e) {
126 }
128 catch (Exception e) {
129 System.err.println("Couldn't instantiate " + type + "(" + string + ")");
130 e.printStackTrace();
131 }
132
133 return null;
134 }
135 }
136 |
Popular Tags |
Java API By Example, From Geeks To Geeks.