1 | package com.framsticks.util.lang; |
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2 | |
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3 | import java.util.ArrayList; |
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4 | import java.util.Collection; |
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5 | import java.util.Iterator; |
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6 | import java.util.List; |
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7 | import java.util.Map; |
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8 | import java.util.TreeMap; |
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9 | |
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10 | import org.apache.commons.collections.functors.InstanceofPredicate; |
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11 | import org.apache.commons.collections.functors.NotPredicate; |
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12 | import org.apache.commons.collections.iterators.FilterIterator; |
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13 | |
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14 | import com.framsticks.util.Builder; |
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15 | import com.framsticks.util.FramsticksException; |
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16 | |
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17 | /** |
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18 | * @author Piotr Sniegowski |
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19 | */ |
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20 | public abstract class Containers { |
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21 | public static void resizeList(List<?> list, int size) { |
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22 | while (list.size() < size) { |
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23 | list.add(null); |
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24 | } |
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25 | while (list.size() > size) { |
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26 | list.remove(list.size() - 1); |
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27 | } |
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28 | } |
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29 | |
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30 | public static <T> Iterable<T> filterInstanceof(Iterator<? super T> i, Class<T> type) { |
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31 | return new IterableIterator<T>(new FilterIterator(i, new InstanceofPredicate(type))); |
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32 | } |
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33 | |
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34 | public static <T> Iterable<T> filterInstanceof(Iterable<? super T> i, Class<T> type) { |
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35 | return new IterableIterator<T>(new FilterIterator(i.iterator(), new InstanceofPredicate(type))); |
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36 | } |
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37 | |
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38 | public static <T> Iterable<T> filterInstanceof(Collection<? super T> c, Class<T> type) { |
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39 | return new IterableIterator<T>(new FilterIterator(c.iterator(), new InstanceofPredicate(type))); |
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40 | } |
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41 | |
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42 | public static <T> Iterable<T> filterNotInstanceof(Collection<T> c, Class<? extends T> type) { |
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43 | return new IterableIterator<T>(new FilterIterator(c.iterator(), new NotPredicate(new InstanceofPredicate(type)))); |
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44 | } |
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45 | |
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46 | public static <T> T getFromList(List<T> list, int number, String name, Object context) { |
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47 | if (number < 0 || number >= list.size()) { |
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48 | throw new FramsticksException().msg("invalid " + name + " number").arg("number", number).arg("in", context); |
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49 | } |
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50 | return list.get(number); |
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51 | } |
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52 | |
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53 | public static <T> List<T> build(List<? extends Builder<T>> builders) { |
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54 | List<T> result = new ArrayList<T>(); |
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55 | for (Builder<T> builder : builders) { |
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56 | result.add(builder.finish()); |
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57 | } |
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58 | return result; |
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59 | } |
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60 | |
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61 | @SafeVarargs |
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62 | public static <K> Map<K, Object> buildMap(Pair<K, ? extends Object> ... pairs) { |
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63 | Map<K, Object> map = new TreeMap<>(); |
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64 | for (Pair<K, ? extends Object> p : pairs) { |
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65 | map.put(p.first, p.second); |
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66 | } |
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67 | return map; |
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68 | } |
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69 | } |
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