Class EmptyList<T>

    • Constructor Detail

      • EmptyList

        EmptyList()
    • Method Detail

      • readResolve

        private java.lang.Object readResolve()
      • with

        public SingletonList<T> with​(T value)
        Description copied from interface: MutableCollection
        This method allows mutable and fixed size collections the ability to add elements to their existing elements. In order to support fixed size a new instance of a collection would have to be returned taking the elements of the original collection and appending the new element to form the new collection. In the case of mutable collections, the original collection is modified, and is returned. In order to use this method properly with mutable and fixed size collections the following approach must be taken:
         MutableCollection<String> list = list.with("1");
         list = list.with("2");
         return list;
         
        In the case of FixedSizeCollection a new instance of MutableCollection will be returned by with, and any variables that previously referenced the original collection will need to be redirected to reference the new instance. For other MutableCollection types you will replace the reference to collection with the same collection, since the instance will return "this" after calling add on itself.
        Specified by:
        with in interface FixedSizeCollection<T>
        Specified by:
        with in interface FixedSizeList<T>
        Specified by:
        with in interface MutableCollection<T>
        Specified by:
        with in interface MutableList<T>
        See Also:
        Collection.add(Object)
      • size

        public int size()
        Description copied from interface: RichIterable
        Returns the number of items in this iterable.
        Specified by:
        size in interface java.util.Collection<T>
        Specified by:
        size in interface java.util.List<T>
        Specified by:
        size in interface RichIterable<T>
      • contains

        public boolean contains​(java.lang.Object obj)
        Description copied from interface: RichIterable
        Returns true if the iterable has an element which responds true to element.equals(object).
        Specified by:
        contains in interface java.util.Collection<T>
        Specified by:
        contains in interface java.util.List<T>
        Specified by:
        contains in interface RichIterable<T>
        Overrides:
        contains in class AbstractMutableList<T>
      • get

        public T get​(int index)
        Description copied from interface: ListIterable
        Returns the item at the specified position in this list iterable.
        Specified by:
        get in interface java.util.List<T>
        Specified by:
        get in interface ListIterable<T>
      • set

        public T set​(int index,
                     T element)
        Specified by:
        set in interface java.util.List<T>
      • replaceAll

        public void replaceAll​(java.util.function.UnaryOperator<T> operator)
        Specified by:
        replaceAll in interface java.util.List<T>
        Since:
        10.0 - Overridden for efficiency
      • sort

        public void sort​(java.util.Comparator<? super T> comparator)
        Description copied from class: AbstractMemoryEfficientMutableList
        This method checks if comparator is null and use a ComparableComparator if it is.
        Specified by:
        sort in interface java.util.List<T>
        Overrides:
        sort in class AbstractMemoryEfficientMutableList<T>
        Since:
        10.0 - Overridden for efficiency
      • sortThis

        public EmptyList<T> sortThis​(java.util.Comparator<? super T> comparator)
        Description copied from interface: MutableList
        Sorts the internal data structure of this list and returns the list itself as a convenience.
        Specified by:
        sortThis in interface FixedSizeList<T>
        Specified by:
        sortThis in interface MutableList<T>
      • sortThisBy

        public <V extends java.lang.Comparable<? super V>> MutableList<T> sortThisBy​(Function<? super T,​? extends V> function)
        Description copied from interface: MutableList
        Sorts the internal data structure of this list based on the natural order of the attribute returned by function.
        Specified by:
        sortThisBy in interface MutableList<T>
      • getFirst

        public T getFirst()
        Description copied from interface: RichIterable
        Returns the first element of an iterable. In the case of a List it is the element at the first index. In the case of any other Collection, it is the first element that would be returned during an iteration. If the iterable is empty, null is returned. If null is a valid element of the container, then a developer would need to check to see if the iterable is empty to validate that a null result was not due to the container being empty.

        The order of Sets are not guaranteed (except for TreeSets and other Ordered Set implementations), so if you use this method, the first element could be any element from the Set.

        Specified by:
        getFirst in interface ListIterable<T>
        Specified by:
        getFirst in interface OrderedIterable<T>
        Specified by:
        getFirst in interface RichIterable<T>
        Overrides:
        getFirst in class AbstractMutableList<T>
      • getLast

        public T getLast()
        Description copied from interface: RichIterable
        Returns the last element of an iterable. In the case of a List it is the element at the last index. In the case of any other Collection, it is the last element that would be returned during an iteration. If the iterable is empty, null is returned. If null is a valid element of the container, then a developer would need to check to see if the iterable is empty to validate that a null result was not due to the container being empty.

        The order of Sets are not guaranteed (except for TreeSets and other Ordered Set implementations), so if you use this method, the last element could be any element from the Set.

        Specified by:
        getLast in interface ListIterable<T>
        Specified by:
        getLast in interface OrderedIterable<T>
        Specified by:
        getLast in interface RichIterable<T>
        Overrides:
        getLast in class AbstractMutableList<T>
      • getOnly

        public T getOnly()
        Description copied from interface: RichIterable
        Returns the element if the iterable has exactly one element. Otherwise, throw IllegalStateException.
        Specified by:
        getOnly in interface RichIterable<T>
        Returns:
        an element of an iterable.
      • each

        public void each​(Procedure<? super T> procedure)
        Description copied from interface: RichIterable
        The procedure is executed for each element in the iterable.

        Example using a Java 8 lambda expression:

         people.each(person -> LOGGER.info(person.getName()));
         

        Example using an anonymous inner class:

         people.each(new Procedure<Person>()
         {
             public void value(Person person)
             {
                 LOGGER.info(person.getName());
             }
         });
         
        This method is a variant of InternalIterable.forEach(Procedure) that has a signature conflict with Iterable.forEach(java.util.function.Consumer).
        Specified by:
        each in interface RichIterable<T>
        Overrides:
        each in class AbstractMutableList<T>
        See Also:
        InternalIterable.forEach(Procedure), Iterable.forEach(java.util.function.Consumer)
      • forEachWithIndex

        public void forEachWithIndex​(ObjectIntProcedure<? super T> objectIntProcedure)
        Description copied from interface: InternalIterable
        Iterates over the iterable passing each element and the current relative int index to the specified instance of ObjectIntProcedure.

        Example using a Java 8 lambda:

         people.forEachWithIndex((Person person, int index) -> LOGGER.info("Index: " + index + " person: " + person.getName()));
         

        Example using an anonymous inner class:

         people.forEachWithIndex(new ObjectIntProcedure<Person>()
         {
             public void value(Person person, int index)
             {
                 LOGGER.info("Index: " + index + " person: " + person.getName());
             }
         });
         
        Specified by:
        forEachWithIndex in interface InternalIterable<T>
        Specified by:
        forEachWithIndex in interface OrderedIterable<T>
        Overrides:
        forEachWithIndex in class AbstractMutableList<T>
      • forEachWith

        public <P> void forEachWith​(Procedure2<? super T,​? super P> procedure,
                                    P parameter)
        Description copied from interface: InternalIterable
        The procedure2 is evaluated for each element in the iterable with the specified parameter provided as the second argument.

        Example using a Java 8 lambda:

         people.forEachWith((Person person, Person other) ->
             {
                 if (person.isRelatedTo(other))
                 {
                      LOGGER.info(person.getName());
                 }
             }, fred);
         

        Example using an anonymous inner class:

         people.forEachWith(new Procedure2<Person, Person>()
         {
             public void value(Person person, Person other)
             {
                 if (person.isRelatedTo(other))
                 {
                      LOGGER.info(person.getName());
                 }
             }
         }, fred);
         
        Specified by:
        forEachWith in interface InternalIterable<T>
        Overrides:
        forEachWith in class AbstractMutableList<T>
      • iterator

        public java.util.Iterator<T> iterator()
        Specified by:
        iterator in interface java.util.Collection<T>
        Specified by:
        iterator in interface java.lang.Iterable<T>
        Specified by:
        iterator in interface java.util.List<T>
        Overrides:
        iterator in class AbstractMutableList<T>
      • min

        public T min​(java.util.Comparator<? super T> comparator)
        Description copied from interface: RichIterable
        Returns the minimum element out of this container based on the comparator.
        Specified by:
        min in interface RichIterable<T>
        Overrides:
        min in class AbstractMutableList<T>
      • max

        public T max​(java.util.Comparator<? super T> comparator)
        Description copied from interface: RichIterable
        Returns the maximum element out of this container based on the comparator.
        Specified by:
        max in interface RichIterable<T>
        Overrides:
        max in class AbstractMutableList<T>
      • minBy

        public <V extends java.lang.Comparable<? super V>> T minBy​(Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        Returns the minimum elements out of this container based on the natural order of the attribute returned by Function.
        Specified by:
        minBy in interface RichIterable<T>
        Overrides:
        minBy in class AbstractMutableList<T>
      • maxBy

        public <V extends java.lang.Comparable<? super V>> T maxBy​(Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        Returns the maximum elements out of this container based on the natural order of the attribute returned by Function.
        Specified by:
        maxBy in interface RichIterable<T>
        Overrides:
        maxBy in class AbstractMutableList<T>
      • zip

        public <S> MutableList<Pair<T,​S>> zip​(java.lang.Iterable<S> that)
        Description copied from interface: RichIterable
        Returns a RichIterable formed from this RichIterable and another RichIterable by combining corresponding elements in pairs. If one of the two RichIterables is longer than the other, its remaining elements are ignored.
        Specified by:
        zip in interface ListIterable<T>
        Specified by:
        zip in interface MutableCollection<T>
        Specified by:
        zip in interface MutableList<T>
        Specified by:
        zip in interface OrderedIterable<T>
        Specified by:
        zip in interface ReversibleIterable<T>
        Specified by:
        zip in interface RichIterable<T>
        Overrides:
        zip in class AbstractMutableList<T>
        Type Parameters:
        S - the type of the second half of the returned pairs
        Parameters:
        that - The RichIterable providing the second half of each result pair
        Returns:
        A new RichIterable containing pairs consisting of corresponding elements of this RichIterable and that. The length of the returned RichIterable is the minimum of the lengths of this RichIterable and that.