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1 /**
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2 * Copyright (c) Rich Hickey. All rights reserved.
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3 * The use and distribution terms for this software are covered by the
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4 * Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
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5 * which can be found in the file epl-v10.html at the root of this distribution.
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6 * By using this software in any fashion, you are agreeing to be bound by
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7 * the terms of this license.
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8 * You must not remove this notice, or any other, from this software.
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9 **/
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10
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11 package clojure.lang;
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12
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13 import java.util.Map;
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14
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15 import clojure.lang.PersistentHashMap.INode;
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16
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17 abstract class ATransientMap extends AFn implements ITransientMap {
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18 abstract void ensureEditable();
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19 abstract ITransientMap doAssoc(Object key, Object val);
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20 abstract ITransientMap doWithout(Object key);
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21 abstract Object doValAt(Object key, Object notFound);
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22 abstract int doCount();
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23 abstract IPersistentMap doPersistent();
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24
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25 public ITransientMap conj(Object o) {
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26 ensureEditable();
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27 if(o instanceof Map.Entry)
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28 {
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29 Map.Entry e = (Map.Entry) o;
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30
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31 return assoc(e.getKey(), e.getValue());
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32 }
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33 else if(o instanceof IPersistentVector)
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34 {
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35 IPersistentVector v = (IPersistentVector) o;
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36 if(v.count() != 2)
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37 throw new IllegalArgumentException("Vector arg to map conj must be a pair");
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38 return assoc(v.nth(0), v.nth(1));
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39 }
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40
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41 ITransientMap ret = this;
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42 for(ISeq es = RT.seq(o); es != null; es = es.next())
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43 {
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44 Map.Entry e = (Map.Entry) es.first();
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45 ret = ret.assoc(e.getKey(), e.getValue());
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46 }
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47 return ret;
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48 }
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49
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50 public final Object invoke(Object arg1) throws Exception{
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51 return valAt(arg1);
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52 }
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53
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54 public final Object invoke(Object arg1, Object notFound) throws Exception{
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55 return valAt(arg1, notFound);
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56 }
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57
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58 public final Object valAt(Object key) {
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59 return valAt(key, null);
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60 }
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61
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62 public final ITransientMap assoc(Object key, Object val) {
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63 ensureEditable();
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64 return doAssoc(key, val);
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65 }
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66
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67 public final ITransientMap without(Object key) {
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68 ensureEditable();
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69 return doWithout(key);
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70 }
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71
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72 public final IPersistentMap persistent() {
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73 ensureEditable();
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74 return doPersistent();
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75 }
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76
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77 public final Object valAt(Object key, Object notFound) {
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78 ensureEditable();
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79 return doValAt(key, notFound);
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80 }
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81
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82 public final int count() {
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83 ensureEditable();
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84 return doCount();
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85 }
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86 }
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