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1
58 package org.apache.ecs.storage;
59
60 import java.io.Serializable  ;
61
62 public class Array implements java.util.Enumeration ,java.io.Serializable
63 {
64 private int current = 0;
65 private int size = 10;
66 private int grow = 2;
67 private int place = 0;
68 private Object [] elements = null;
69 private Object [] tmpElements = null;
70
71 public Array()
72 {
73 init();
74 }
75
76 public Array(int size)
77 {
78 setSize(size);
79 init();
80 }
81
82 public Array(int size,int grow)
83 {
84 setSize(size);
85 setGrow(grow);
86 init();
87 }
88
89 private void init()
90 {
91 elements = new Object [size];
92 }
93
94 public Object nextElement() throws java.util.NoSuchElementException
95 {
96 if ( elements[place] != null && place != current)
97 {
98 place++;
99 return elements[place - 1];
100 }
101 else
102 {
103 place = 0;
104 throw new java.util.NoSuchElementException ();
105 }
106 }
107
108 public boolean hasMoreElements()
109 {
110 if( place < elements.length && current != place )
111 return true;
112 return false;
113 }
114
115 public void setSize(int size)
116 {
117 this.size = size;
118 }
119
120 public int getCurrentSize()
121 {
122 return current;
123 }
124
125 public void rehash()
126 {
127 tmpElements = new Object [size];
128 int count = 0;
129 for ( int x = 0; x < elements.length; x++ )
130 {
131 if( elements[x] != null )
132 {
133 tmpElements[count] = elements[x];
134 count++;
135 }
136 }
137 elements = (Object [])tmpElements.clone();
138 tmpElements = null;
139 current = count;
140 }
141
142 public void setGrow(int grow)
143 {
144 this.grow = grow;
145 }
146
147 public void grow()
148 {
149 size = size+=(size/grow);
150 rehash();
151 }
152
153 public void add(Object o)
154 {
155 if( current == elements.length )
156 grow();
157
158 try
159 {
160 elements[current] = o;
161 current++;
162 }
163 catch(java.lang.ArrayStoreException ase)
164 {
165 }
166 }
167
168 public void add(int location,Object o)
169 {
170 try
171 {
172 elements[location] = o;
173 }
174 catch(java.lang.ArrayStoreException ase)
175 {
176 }
177 }
178
179 public void remove(int location)
180 {
181 elements[location] = null;
182 }
183
184 public int location(Object o) throws NoSuchObjectException
185 {
186 int loc = -1;
187 for ( int x = 0; x < elements.length; x++ )
188 {
189 if((elements[x] != null && elements[x] == o )||
190 (elements[x] != null && elements[x].equals(o)))
191 {
192 loc = x;
193 break;
194 }
195 }
196 if( loc == -1 )
197 throw new NoSuchObjectException();
198 return(loc);
199 }
200
201 public Object get(int location)
202 {
203 return elements[location];
204 }
205
206 public java.util.Enumeration elements()
207 {
208 return this;
209 }
210 }
211 |
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