|
1
9 package org.jboss.portal.common.value;
10
11
12 import java.util.Arrays  ;
13 import java.util.List ;
14
15
19 public abstract class AbstractValues implements Value
20 {
21
22
23 private int hashCode = 0;
24
25
28 protected abstract Object [] getObjects();
29
30 public int asInt() throws NullConversionException, FormatConversionException
31 {
32 int[] tmp = asIntArray();
33 if (tmp.length == 0)
34 {
35 throw new NullConversionException();
36 }
37 return tmp[0];
38 }
39
40 public boolean asBoolean() throws NullConversionException, FormatConversionException
41 {
42 boolean[] tmp = asBooleanArray();
43 if (tmp.length == 0)
44 {
45 throw new NullConversionException();
46 }
47 return tmp[0];
48 }
49
50 public boolean isNull()
51 {
52 return getObjects().length == 0 || getObjects()[0] == null;
53 }
54
55 public boolean isMultiValued()
56 {
57 return getObjects().length > 1;
58 }
59
60
63 public int[] asIntArray() throws NullConversionException, FormatConversionException
64 {
65 throw new FormatConversionException();
66 }
67
68
71 public boolean[] asBooleanArray() throws NullConversionException, FormatConversionException
72 {
73 throw new FormatConversionException();
74 }
75
76 public int hashCode()
77 {
78 if (isNull())
79 {
80 return 0;
81 }
82 else
83 {
84 if (hashCode == 0)
85 {
86 Object [] objects = getObjects();
87 for (int i = 0;i < objects.length;i++)
88 {
89 Object o = objects[i];
90 if (o != null)
91 {
92 hashCode *= 43 + o.hashCode();
93 }
94 }
95 }
96 else
97 {
98 return hashCode;
99 }
100 }
101 return hashCode;
102 }
103
104 public boolean equals(Object obj)
105 {
106 if (obj == this)
107 {
108 return true;
109 }
110 if (obj.getClass().equals(getClass()))
111 {
112 AbstractValues other = (AbstractValues)obj;
113 switch ((other.isNull() ? 2 : 0) + (isNull() ? 1 : 0))
114 {
115 case 1:
116 case 2:
117 return false;
118 case 3:
119 return true;
120 }
121 return Arrays.equals(getObjects(), other.getObjects());
122 }
123 return false;
124 }
125
126 public Object [] asObjectArray()
127 {
128 if (isNull())
129 {
130 return Helper.EMPTY_OBJECT_ARRAY;
131 }
132 return getObjects();
133 }
134
135 public Object asObject()
136 {
137 if (isNull())
138 {
139 return null;
140 }
141 return getObjects()[0];
142 }
143
144 public List asObjectList()
145 {
146 Object [] values = asObjectArray();
147 return Arrays.asList(values);
148 }
149
150 public String toString()
151 {
152 StringBuffer buffer = new StringBuffer ("[");
153 String [] strings = asStringArray();
154 for (int i = 0;i < strings.length;i++)
155 {
156 String s = strings[i];
157 buffer.append(i > 0 ? "," : "").
158 append(String.valueOf(s));
159 }
160 buffer.append("]");
161 return buffer.toString();
162 }
163 }
164 |
Popular Tags |
Java API By Example, From Geeks To Geeks.