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| package edu.rice.cs.plt.collect; |
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| import java.util.Iterator; |
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| import java.io.Serializable; |
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| import edu.rice.cs.plt.tuple.Pair; |
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| import edu.rice.cs.plt.lambda.Runnable1; |
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| import edu.rice.cs.plt.iter.EmptyIterator; |
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| import edu.rice.cs.plt.iter.MutableSingletonIterator; |
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| public abstract class AbstractOneToOneRelation<T1, T2> extends AbstractFunctionalRelation<T1, T2> |
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| implements OneToOneRelation<T1, T2> { |
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| public abstract boolean isStatic(); |
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| public abstract LambdaMap<T1, T2> functionMap(); |
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| public abstract LambdaMap<T2, T1> injectionMap(); |
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0
| public PredicateSet<T2> secondSet() { return injectionMap().keySet(); }
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| @Override public boolean containsSecond(T2 second) { return injectionMap().containsKey(second); }
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| public PredicateSet<T1> matchSecond(T2 second) { return new MatchSecondSet(second); }
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| public T1 antecedent(T2 second) { return injectionMap().get(second); }
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| @Override public OneToOneRelation<T2, T1> inverse() { return new InverseOneToOneRelation(); }
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| private final class MatchSecondSet extends AbstractPredicateSet<T1> implements Serializable { |
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| private final T2 _key; |
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| public MatchSecondSet(T2 second) { _key = second; }
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| @Override public boolean isEmpty() { return !injectionMap().containsKey(_key); }
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| @Override public int size() { return injectionMap().containsKey(_key) ? 1 : 0; }
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| @Override public int size(int bound) { return (bound == 0) ? 0 : size(); }
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| public boolean isInfinite() { return false; }
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| public boolean hasFixedSize() { return AbstractOneToOneRelation.this.isStatic(); }
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| public boolean isStatic() { return AbstractOneToOneRelation.this.isStatic(); }
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0
| public boolean contains(Object val) {
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| return AbstractOneToOneRelation.this.contains(Pair.make(val, _key));
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| } |
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| public Iterator<T1> iterator() {
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| final LambdaMap<T2, T1> map = injectionMap();
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| if (map.containsKey(_key)) {
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| return new MutableSingletonIterator<T1>(map.get(_key), new Runnable1<T1>() {
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| public void run(T1 val) { map.remove(_key); }
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| }); |
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| } |
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| else { return EmptyIterator.make(); }
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| } |
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| @Override public boolean add(T1 val) {
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| boolean result = !AbstractOneToOneRelation.this.contains(val, _key);
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| if (result) { injectionMap().put(_key, val); }
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| return result;
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| } |
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0
| @Override public boolean remove(Object val) {
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| boolean result = AbstractOneToOneRelation.this.contains(Pair.make(val, _key));
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| if (result) { injectionMap().remove(_key); }
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| return result;
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| } |
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| @Override public void clear() { injectionMap().remove(_key); }
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| } |
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| protected class InverseOneToOneRelation extends InverseFunctionalRelation implements OneToOneRelation<T2, T1> { |
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0
| public T1 value(T2 first) { return AbstractOneToOneRelation.this.antecedent(first); }
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0
| public LambdaMap<T2, T1> functionMap() { return AbstractOneToOneRelation.this.injectionMap(); }
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0
| @Override public OneToOneRelation<T1, T2> inverse() { return AbstractOneToOneRelation.this; }
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| } |
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| } |