Esempio n. 1
0
 public static <U> ICollectionSequence<U> fromCollection(final Collection<U> coll) {
   if (AbstractSequence.USE_NULL_SEQUENCE) {
     if (coll == null) {
       return NullCollectionSequence.instance();
     }
   }
   if (coll instanceof ICollectionSequence<?>) {
     return (ICollectionSequence<U>) coll;
   }
   return new CollectionSequence<U>() {
     @Override
     protected Collection<U> getCollection() {
       return coll;
     }
   };
 }
Esempio n. 2
0
 public static <U> ICollectionSequence<U> fromCollectionAndArray(Collection<U> coll, U... array) {
   if (AbstractSequence.NULL_ARRAY_IS_SINGLETON) {
     if (array == null) {
       array = (U[]) Sequence.nullSingletonArray();
     }
   }
   if (AbstractSequence.USE_NULL_SEQUENCE) {
     if (coll == null && array == null) {
       return NullCollectionSequence.instance();
     } else if (coll == null) {
       coll = new ArrayList<U>();
     } else if (array == null) {
       if (coll instanceof ICollectionSequence<?>) {
         return (ICollectionSequence<U>) coll;
       }
       final Collection<U> myColl = coll;
       return new CollectionSequence<U>() {
         @Override
         protected Collection<U> getCollection() {
           return myColl;
         }
       };
     }
   }
   List<U> input = Arrays.asList(array);
   if (AbstractSequence.IGNORE_NULL_VALUES) {
     for (U u : input) {
       if (u != null) {
         coll.add(u);
       }
     }
   } else {
     coll.addAll(input);
   }
   if (coll instanceof ICollectionSequence<?>) {
     return (ICollectionSequence<U>) coll;
   }
   final Collection<U> myColl = coll;
   return new CollectionSequence<U>() {
     @Override
     protected Collection<U> getCollection() {
       return myColl;
     }
   };
 }
Esempio n. 3
0
 public static <U> ICollectionSequence<U> fromCollectionWithValues(
     Collection<U> coll, Iterable<? extends U> it) {
   Collection<U> tmp = coll;
   if (AbstractSequence.USE_NULL_SEQUENCE) {
     if (coll == null && it == null) {
       return NullCollectionSequence.instance();
     } else if (coll == null) {
       tmp = new ArrayList<U>();
     } else if (it == null) {
       return CollectionSequence.fromCollection(coll);
     }
   }
   if (AbstractSequence.IGNORE_NULL_VALUES) {
     for (U u : it) {
       if (u != null) {
         tmp.add(u);
       }
     }
   } else if (it instanceof Collection<?>) {
     tmp.addAll((Collection<? extends U>) it);
   } else {
     for (U u : it) {
       tmp.add(u);
     }
   }
   if (tmp instanceof ICollectionSequence<?>) {
     return (ICollectionSequence<U>) tmp;
   }
   final Collection<U> myColl = tmp;
   return new CollectionSequence<U>() {
     @Override
     protected Collection<U> getCollection() {
       return myColl;
     }
   };
 }