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1
9 package org.jboss.portal.common.value;
10
11
12
16 public class Helper
17 {
18
19 public static final int[] EMPTY_INT_ARRAY = new int[0];
20 public static final boolean[] EMPTY_BOOLEAN_ARRAY = new boolean[0];
21 public static final Object  [] EMPTY_OBJECT_ARRAY = new Object [0];
22 public static final String [] EMPTY_STRING_ARRAY = new String [0];
23
24 public static final Converter INTEGER_CONVERTER = new Converter()
25 {
26 public boolean accept(Class clazz)
27 {
28 return Integer .class.equals(clazz);
29 }
30 public Object toObject(String value) throws NullConversionException, FormatConversionException
31 {
32 if (value == null)
33 {
34 return null;
35 }
36 try
37 {
38 return Integer.decode(value);
39 }
40 catch (NumberFormatException e)
41 {
42 throw new FormatConversionException();
43 }
44 }
45 public String toString(Object value) throws NullConversionException, FormatConversionException
46 {
47 if (value == null)
48 {
49 return null;
50 }
51 if (!(value instanceof Integer ))
52 {
53 throw new FormatConversionException();
54 }
55 return value.toString();
56 }
57 };
58
59 public static final Converter BOOLEAN_CONVERTER = new Converter()
60 {
61 public boolean accept(Class clazz)
62 {
63 return Boolean .class.equals(clazz);
64 }
65 public Object toObject(String value) throws NullConversionException, FormatConversionException
66 {
67 if (value == null)
68 {
69 return null;
70 }
71 return Boolean.valueOf(Helper.toBoolean(value));
72 }
73 public String toString(Object value) throws NullConversionException, FormatConversionException
74 {
75 if (value == null)
76 {
77 return null;
78 }
79 if (!(value instanceof Boolean ))
80 {
81 throw new FormatConversionException();
82 }
83 return value.toString();
84 }
85 };
86
87 public static int toInt(String value) throws NullConversionException, FormatConversionException
88 {
89 try
90 {
91 if (value == null)
92 {
93 throw new NullConversionException();
94 }
95 return Integer.parseInt(value);
96 }
97 catch (NumberFormatException e)
98 {
99 throw new FormatConversionException();
100 }
101 }
102
103 public static boolean toBoolean(String value) throws NullConversionException, FormatConversionException
104 {
105 if ("true".equals(value))
106 {
107 return true;
108 }
109 else if ("false".equals(value))
110 {
111 return false;
112 }
113 else if (value == null)
114 {
115 throw new NullConversionException();
116 }
117 else
118 {
119 throw new FormatConversionException();
120 }
121 }
122
123 public static String toString(int value)
124 {
125 return Integer.toString(value);
126 }
127
128 public static String toString(boolean value)
129 {
130 return Boolean.toString(value);
131 }
132
133 public static String toString(Object value, Converter converter) throws NullConversionException, FormatConversionException, IllegalArgumentException
134 {
135 if (converter == null)
136 {
137 throw new IllegalArgumentException ();
138 }
139 return converter.toString(value);
140 }
141
142 public static String [] toStringArray(int[] values) throws IllegalArgumentException
143 {
144 if (values == null)
145 {
146 throw new IllegalArgumentException ();
147 }
148 String [] strings = new String [values.length];
149 for (int i = 0;i < strings.length;i++)
150 {
151 strings[i] = Integer.toString(values[i]);
152 }
153 return strings;
154 }
155
156 public static String [] toStringArray(boolean[] values) throws IllegalArgumentException
157 {
158 if (values == null)
159 {
160 throw new IllegalArgumentException ();
161 }
162 String [] strings = new String [values.length];
163 for (int i = 0;i < strings.length;i++)
164 {
165 strings[i] = Boolean.toString(values[i]);
166 }
167 return strings;
168 }
169
170 public static String [] toStringArray(Object [] values, Converter converter) throws NullConversionException, FormatConversionException, IllegalArgumentException
171 {
172 if (values == null)
173 {
174 throw new IllegalArgumentException ();
175 }
176 if (converter == null)
177 {
178 throw new IllegalArgumentException ();
179 }
180 String [] strings = new String [values.length];
181 for (int i = 0;i < strings.length;i++)
182 {
183 Object value = values[i];
184 if (value != null)
185 {
186 strings[i] = converter.toString(values[i]);
187 }
188 }
189 return strings;
190 }
191 }
192 |
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