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1 package jp.ac.u_ryukyu.ie.cr.bbs.local.bbs;
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1
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2
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3 import java.util.Iterator;
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4
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5 public class IterableConverter<A,B> implements Iterable<A>
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6 {
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7 private final Iterable<B> iterable;
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8 private final Converter<A,B> converter;
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9
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10 public IterableConverter(Iterable<B> _iterable,Converter<A,B> _converter)
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11 {
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12 iterable = _iterable;
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13 converter = _converter;
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14 }
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15
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16 public Iterator<A> iterator()
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17 {
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18 return new IteratorConverter<A,B>(iterable.iterator(),converter);
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19 }
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20
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21 private static final class IteratorConverter<A,B> implements Iterator<A>
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22 {
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23 private final Iterator<B> iterator;
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24 private final Converter<A,B> converter;
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25
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26 public IteratorConverter(Iterator<B> _iterator,Converter<A,B> _converter)
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27 {
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28 iterator = _iterator;
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29 converter = _converter;
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30 }
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31
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32 public boolean hasNext()
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33 {
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34 return iterator.hasNext();
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35 }
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36
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37 public A next()
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38 {
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39 return converter.conv(iterator.next());
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40 }
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41
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42 public void remove()
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43 {
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44 iterator.remove();
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45 }
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46 }
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47
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48 public static interface Converter<A,B>
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49 {
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50 public A conv(B _b);
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51 }
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52 }
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