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Java > Open Source Codes > org > lateralnz > common > util > EnumIterWrapper


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55 package org.lateralnz.common.util;
56
57 import java.util.Enumeration JavaDoc;
58 import java.util.Iterator JavaDoc;
59
60 /**
61  * an enumeration wrapper for an iterator and vice versa
62  *
63  * @author J R Briggs
64  */

65 public class EnumIterWrapper implements Enumeration JavaDoc, Iterator JavaDoc {
66   Iterator JavaDoc iter = null;
67   Enumeration JavaDoc en = null;
68   
69   boolean it = false;
70   
71   public EnumIterWrapper(Iterator JavaDoc iter) {
72     this.iter = iter;
73     this.it = true;
74   }
75   
76   public EnumIterWrapper(Enumeration JavaDoc en) {
77     this.en = en;
78     this.it = false;
79   }
80
81   public boolean hasMoreElements() {
82     if (it) {
83       return iter.hasNext();
84     }
85     else {
86       return en.hasMoreElements();
87     }
88   }
89   
90   public boolean hasNext() {
91     if (it) {
92       return iter.hasNext();
93     }
94     else {
95       return en.hasMoreElements();
96     }
97   }
98
99   public Object JavaDoc nextElement() {
100     if (it) {
101       return iter.next();
102     }
103     else {
104       return en.nextElement();
105     }
106   }
107   
108   public Object JavaDoc next() {
109     if (it) {
110       return iter.next();
111     }
112     else {
113       return en.nextElement();
114     }
115   }
116   
117   public void remove() {
118     if (it) {
119       iter.remove();
120     }
121     else {
122       throw new UnsupportedOperationException JavaDoc();
123     }
124   }
125 }
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