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1
9 package org.jboss.portal.common;
10
11 import java.io.IOException  ;
12 import java.io.ObjectInputStream ;
13 import java.io.ObjectOutputStream ;
14 import java.io.Serializable ;
15
16
22 public class FQN implements Serializable
23 {
24
25 private static final String [] EMPTY_ARRAY = new String [0];
26
27
28 protected String [] names;
30
31 private int hashCode;
32
33 public FQN()
34 {
35 names = EMPTY_ARRAY;
36 hashCode = 0;
37 }
38
39 public FQN(String name) throws IllegalArgumentException
40 {
41 if (name == null)
42 {
43 throw new IllegalArgumentException ("Name cannot be null");
44 }
45 names = new String []{name};
46 hashCode = 0;
47 }
48
49 public FQN(String [] names) throws IllegalArgumentException
50 {
51 if (names == null)
52 {
53 throw new IllegalArgumentException ("Names array must not be null");
54 }
55 this.names = new String [names.length];
56 this.hashCode = 0;
57 for (int i = 0;i < names.length;i++)
58 {
59 String name = names[i];
60 if (name == null)
61 {
62 throw new IllegalArgumentException ("One of the names is null");
63 }
64 this.names[i] = name;
65 }
66 }
67
68 public FQN(FQN base, String name) throws IllegalArgumentException
69 {
70 if (base == null)
71 {
72 throw new IllegalArgumentException ("Base cannot be null");
73 }
74 if (name == null)
75 {
76 throw new IllegalArgumentException ("Name cannot be null");
77 }
78 names = new String [base.names.length + 1];
79 hashCode = 0;
80 System.arraycopy(base.names, 0, names, 0, base.names.length);
81 names[base.names.length] = name;
82 }
83
84 public FQN(FQN base, String [] relative) throws IllegalArgumentException
85 {
86 if (base == null)
87 {
88 throw new IllegalArgumentException ("Base cannot be null");
89 }
90 if (relative == null)
91 {
92 throw new IllegalArgumentException ("Relative cannot be null");
93 }
94 names = new String [base.names.length + relative.length];
95 hashCode = 0;
96 System.arraycopy(base.names, 0, names, 0, base.names.length);
97 System.arraycopy(relative, 0, names, base.names.length, relative.length);
98 }
99
100 public FQN(FQN base, FQN relative) throws IllegalArgumentException
101 {
102 if (base == null)
103 {
104 throw new IllegalArgumentException ("Base cannot be null");
105 }
106 if (relative == null)
107 {
108 throw new IllegalArgumentException ("Relative cannot be null");
109 }
110 names = new String [base.names.length + relative.names.length];
111 hashCode = 0;
112 System.arraycopy(base.names, 0, names, 0, base.names.length);
113 System.arraycopy(relative.names, 0, names, base.names.length, relative.names.length);
114 }
115
116 public int size()
117 {
118 return names.length;
119 }
120
121 public String getName(int index) throws ArrayIndexOutOfBoundsException
122 {
123 return names[index];
124 }
125
126 public String [] toArray()
127 {
128 String [] copy = new String [names.length];
129 System.arraycopy(names, 0, copy, 0, copy.length);
130 return copy;
131 }
132
133 public boolean isChildOf(FQN parent) throws IllegalArgumentException
134 {
135 if (parent == null)
136 {
137 throw new IllegalArgumentException ("Cannot compare to null");
138 }
139 if (names.length != parent.names.length + 1)
140 {
141 return false;
142 }
143 for (int i = 0;i < parent.names.length;i++)
144 {
145 Object name = parent.names[i];
146 if (!name.equals(names[i]))
147 {
148 return false;
149 }
150 }
151 return true;
152 }
153
154 public boolean equals(Object obj)
155 {
156 if (obj == this)
157 {
158 return true;
159 }
160 if (!(obj instanceof FQN))
161 {
162 return false;
163 }
164 FQN other = (FQN)obj;
165 if (other.names.length != names.length)
166 {
167 return false;
168 }
169 for (int i = 0;i < names.length;i++)
170 {
171 if (!names[i].equals(other.names[i]))
172 {
173 return false;
174 }
175 }
176 return true;
177 }
178
179 public int hashCode()
180 {
181 if (names.length == 0)
182 {
183 return 0;
184 }
185 if (hashCode == 0)
186 {
187 int tmp = 0;
188 for (int i = 0;i < names.length;i++)
189 {
190 tmp = tmp * 29 + names[i].hashCode();
191 }
192 hashCode = tmp;
193 }
194 return hashCode;
195 }
196
197 public String toString()
198 {
199 StringBuffer buffer = new StringBuffer ();
200 for (int i = 0;i < names.length;i++)
201 {
202 buffer.append('/').append(names[i]);
203 }
204 return buffer.toString();
205 }
206
207 private void writeObject(ObjectOutputStream out) throws IOException
208 {
209 out.writeInt(names.length);
210 for (int i = 0; i < names.length; i++)
211 {
212 out.writeObject(names[i]);
213 }
214 }
215
216 private void readObject(ObjectInputStream in) throws IOException , ClassNotFoundException
217 {
218 names = new String [in.readInt()];
219 for (int i = 0; i < names.length; i++)
220 {
221 names[i] = (String )in.readObject();
222 }
223 }
224 }
225 |
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