Interface OrderedIterable<T>

    • Method Detail

      • indexOf

        int indexOf​(java.lang.Object object)
        Returns the index of the first occurrence of the specified item in this iterable, or -1 if this iterable does not contain the item.
        See Also:
        List.indexOf(Object)
      • getFirst

        T getFirst()
        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.
        Specified by:
        getFirst in interface RichIterable<T>
      • getFirstOptional

        default java.util.Optional<T> getFirstOptional()
        Returns the first element of an iterable as an Optional. 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, Optional.empty() is returned.
        Throws:
        java.lang.NullPointerException - if the element is null
        Since:
        8.2
      • getLast

        T getLast()
        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.
        Specified by:
        getLast in interface RichIterable<T>
      • getLastOptional

        default java.util.Optional<T> getLastOptional()
        Returns the last element of an iterable as an Optional. 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, Optional.empty() is returned.
        Throws:
        java.lang.NullPointerException - if the element is null
        Since:
        8.2
      • tap

        OrderedIterable<T> tap​(Procedure<? super T> procedure)
        Description copied from interface: RichIterable
        Executes the Procedure for each element in the iterable and returns this.

        Example using a Java 8 lambda expression:

         RichIterable<Person> tapped =
             people.tap(person -> LOGGER.info(person.getName()));
         

        Example using an anonymous inner class:

         RichIterable<Person> tapped =
             people.tap(new Procedure<Person>()
             {
                 public void value(Person person)
                 {
                     LOGGER.info(person.getName());
                 }
             });
         
        Specified by:
        tap in interface RichIterable<T>
        See Also:
        RichIterable.each(Procedure), RichIterable.forEach(Procedure)
      • takeWhile

        OrderedIterable<T> takeWhile​(Predicate<? super T> predicate)
        Returns the initial elements that satisfy the Predicate. Short circuits at the first element which does not satisfy the Predicate.
      • dropWhile

        OrderedIterable<T> dropWhile​(Predicate<? super T> predicate)
        Returns the final elements that do not satisfy the Predicate. Short circuits at the first element which does satisfy the Predicate.
      • partitionWhile

        PartitionOrderedIterable<T> partitionWhile​(Predicate<? super T> predicate)
        Returns a Partition of the initial elements that satisfy the Predicate and the remaining elements. Short circuits at the first element which does satisfy the Predicate.
      • distinct

        OrderedIterable<T> distinct()
        Returns a new OrderedIterable containing the distinct elements in this iterable.

        Conceptually similar to RichIterable.toSet().RichIterable.toList() but retains the original order. If an element appears multiple times in this iterable, the first one will be copied into the result.

        Returns:
        OrderedIterable of distinct elements
      • corresponds

        <S> boolean corresponds​(OrderedIterable<S> other,
                                Predicate2<? super T,​? super S> predicate)
        Returns true if both OrderedIterables have the same length and predicate returns true for all corresponding elements e1 of this OrderedIterable and e2 of other. The predicate is evaluated for each element at the same position of each OrderedIterable in a forward iteration order. This is a short circuit pattern.
        Since:
        6.0
      • forEach

        void forEach​(int startIndex,
                     int endIndex,
                     Procedure<? super T> procedure)
        Iterates over the section of the iterable covered by the specified inclusive indexes. The indexes are both inclusive.
        e.g.
         OrderedIterable<People> people = FastList.newListWith(ted, mary, bob, sally)
         people.forEach(0, 1, new Procedure<Person>()
         {
             public void value(Person person)
             {
                  LOGGER.info(person.getName());
             }
         });
         

        This code would output ted and mary's names.

      • forEachWithIndex

        void forEachWithIndex​(ObjectIntProcedure<? super T> objectIntProcedure)
        Iterates over the iterable passing each element and the current relative int index to the specified instance of ObjectIntProcedure
        e.g.
         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>
      • forEachWithIndex

        void forEachWithIndex​(int fromIndex,
                              int toIndex,
                              ObjectIntProcedure<? super T> objectIntProcedure)
        Iterates over the section of the iterable covered by the specified inclusive indexes. The indexes are both inclusive.
        e.g.
         OrderedIterable<People> people = FastList.newListWith(ted, mary, bob, sally)
         people.forEachWithIndex(0, 1, new ObjectIntProcedure<Person>()
         {
             public void value(Person person, int index)
             {
                  LOGGER.info(person.getName());
             }
         });
         

        This code would output ted and mary's names.

      • toStack

        default MutableStack<T> toStack()
        Converts the OrderedIterable to a mutable MutableStack implementation.
      • min

        T min()
        Returns the minimum element out of this container based on the natural order, not the order of this container. If you want the minimum element based on the order of this container, use getFirst().
        Specified by:
        min in interface RichIterable<T>
        Throws:
        java.lang.ClassCastException - if the elements are not Comparable
        java.util.NoSuchElementException - if the OrderedIterable is empty
      • max

        T max()
        Returns the maximum element out of this container based on the natural order, not the order of this container. If you want the maximum element based on the order of this container, use getLast().
        Specified by:
        max in interface RichIterable<T>
        Throws:
        java.lang.ClassCastException - if the elements are not Comparable
        java.util.NoSuchElementException - if the OrderedIterable is empty
      • select

        OrderedIterable<T> select​(Predicate<? super T> predicate)
        Description copied from interface: RichIterable
        Returns all elements of the source collection that return true when evaluating the predicate. This method is also commonly called filter.

        Example using a Java 8 lambda expression:

         RichIterable<Person> selected =
             people.select(person -> person.getAddress().getCity().equals("London"));
         

        Example using an anonymous inner class:

         RichIterable<Person> selected =
             people.select(new Predicate<Person>()
             {
                 public boolean accept(Person person)
                 {
                     return person.getAddress().getCity().equals("London");
                 }
             });
         
        Specified by:
        select in interface RichIterable<T>
      • selectWith

        <P> OrderedIterable<T> selectWith​(Predicate2<? super T,​? super P> predicate,
                                          P parameter)
        Description copied from interface: RichIterable
        Similar to RichIterable.select(Predicate), except with an evaluation parameter for the second generic argument in Predicate2.

        E.g. return a Collection of Person elements where the person has an age greater than or equal to 18 years

        Example using a Java 8 lambda expression:

         RichIterable<Person> selected =
             people.selectWith((Person person, Integer age) -> person.getAge()>= age, Integer.valueOf(18));
         

        Example using an anonymous inner class:

         RichIterable<Person> selected =
             people.selectWith(new Predicate2<Person, Integer>()
             {
                 public boolean accept(Person person, Integer age)
                 {
                     return person.getAge()>= age;
                 }
             }, Integer.valueOf(18));
         
        Specified by:
        selectWith in interface RichIterable<T>
        Parameters:
        predicate - a Predicate2 to use as the select criteria
        parameter - a parameter to pass in for evaluation of the second argument P in predicate
        See Also:
        RichIterable.select(Predicate)
      • reject

        OrderedIterable<T> reject​(Predicate<? super T> predicate)
        Description copied from interface: RichIterable
        Returns all elements of the source collection that return false when evaluating of the predicate. This method is also sometimes called filterNot and is the equivalent of calling iterable.select(Predicates.not(predicate)).

        Example using a Java 8 lambda expression:

         RichIterable<Person> rejected =
             people.reject(person -> person.person.getLastName().equals("Smith"));
         

        Example using an anonymous inner class:

         RichIterable<Person> rejected =
             people.reject(new Predicate<Person>()
             {
                 public boolean accept(Person person)
                 {
                     return person.person.getLastName().equals("Smith");
                 }
             });
         
        Specified by:
        reject in interface RichIterable<T>
        Parameters:
        predicate - a Predicate to use as the reject criteria
        Returns:
        a RichIterable that contains elements that cause Predicate.accept(Object) method to evaluate to false
      • rejectWith

        <P> OrderedIterable<T> rejectWith​(Predicate2<? super T,​? super P> predicate,
                                          P parameter)
        Description copied from interface: RichIterable
        Similar to RichIterable.reject(Predicate), except with an evaluation parameter for the second generic argument in Predicate2.

        E.g. return a Collection of Person elements where the person has an age greater than or equal to 18 years

        Example using a Java 8 lambda expression:

         RichIterable<Person> rejected =
             people.rejectWith((Person person, Integer age) -> person.getAge() < age, Integer.valueOf(18));
         

        Example using an anonymous inner class:

         MutableList<Person> rejected =
             people.rejectWith(new Predicate2<Person, Integer>()
             {
                 public boolean accept(Person person, Integer age)
                 {
                     return person.getAge() < age;
                 }
             }, Integer.valueOf(18));
         
        Specified by:
        rejectWith in interface RichIterable<T>
        Parameters:
        predicate - a Predicate2 to use as the select criteria
        parameter - a parameter to pass in for evaluation of the second argument P in predicate
        See Also:
        RichIterable.select(Predicate)
      • partition

        PartitionOrderedIterable<T> partition​(Predicate<? super T> predicate)
        Description copied from interface: RichIterable
        Filters a collection into a PartitionedIterable based on the evaluation of the predicate.

        Example using a Java 8 lambda expression:

         PartitionIterable<Person> newYorkersAndNonNewYorkers =
             people.partition(person -> person.getAddress().getState().getName().equals("New York"));
         

        Example using an anonymous inner class:

         PartitionIterable<Person> newYorkersAndNonNewYorkers =
             people.partition(new Predicate<Person>()
             {
                 public boolean accept(Person person)
                 {
                     return person.getAddress().getState().getName().equals("New York");
                 }
             });
         
        Specified by:
        partition in interface RichIterable<T>
      • partitionWith

        <P> PartitionOrderedIterable<T> partitionWith​(Predicate2<? super T,​? super P> predicate,
                                                      P parameter)
        Description copied from interface: RichIterable
        Filters a collection into a PartitionIterable based on the evaluation of the predicate.

        Example using a Java 8 lambda expression:

         PartitionIterable<Person> newYorkersAndNonNewYorkers =
             people.partitionWith((Person person, String state) -> person.getAddress().getState().getName().equals(state), "New York");
         

        Example using an anonymous inner class:

         PartitionIterable<Person> newYorkersAndNonNewYorkers =
             people.partitionWith(new Predicate2<Person, String>()
             {
                 public boolean accept(Person person, String state)
                 {
                     return person.getAddress().getState().getName().equals(state);
                 }
             }, "New York");
         
        Specified by:
        partitionWith in interface RichIterable<T>
      • selectInstancesOf

        <S> OrderedIterable<S> selectInstancesOf​(java.lang.Class<S> clazz)
        Description copied from interface: RichIterable
        Returns all elements of the source collection that are instances of the Class clazz.
         RichIterable<Integer> integers =
             List.mutable.with(new Integer(0), new Long(0L), new Double(0.0)).selectInstancesOf(Integer.class);
         
        Specified by:
        selectInstancesOf in interface RichIterable<T>
      • collect

        <V> OrderedIterable<V> collect​(Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        Returns a new collection with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.

        Example using a Java 8 lambda expression:

         RichIterable<String> names =
             people.collect(person -> person.getFirstName() + " " + person.getLastName());
         

        Example using an anonymous inner class:

         RichIterable<String> names =
             people.collect(new Function<Person, String>()
             {
                 public String valueOf(Person person)
                 {
                     return person.getFirstName() + " " + person.getLastName();
                 }
             });
         
        Specified by:
        collect in interface RichIterable<T>
      • collectWithIndex

        default <V> OrderedIterable<V> collectWithIndex​(ObjectIntToObjectFunction<? super T,​? extends V> function)
        Returns a new OrderedIterable using results obtained by applying the specified function to each element and its corresponding index.
        Since:
        9.1.
      • collectWithIndex

        default <V,​R extends java.util.Collection<V>> R collectWithIndex​(ObjectIntToObjectFunction<? super T,​? extends V> function,
                                                                               R target)
        Adds elements to the target Collection using results obtained by applying the specified function to each element and its corresponding index.
        Since:
        9.1.
      • selectWithIndex

        default <R extends java.util.Collection<T>> R selectWithIndex​(ObjectIntPredicate<? super T> predicate,
                                                                      R target)
        Adds all elements to the target Collection that return true when evaluating the specified predicate which is supplied each element and its relative index.
        Since:
        11.0
      • rejectWithIndex

        default <R extends java.util.Collection<T>> R rejectWithIndex​(ObjectIntPredicate<? super T> predicate,
                                                                      R target)
        Adds all elements to the target Collection that return false when evaluating the specified predicate which is supplied each element and its relative index.
        Since:
        11.0
      • collectWith

        <P,​V> OrderedIterable<V> collectWith​(Function2<? super T,​? super P,​? extends V> function,
                                                   P parameter)
        Description copied from interface: RichIterable
        Same as RichIterable.collect(Function) with a Function2 and specified parameter which is passed to the block.

        Example using a Java 8 lambda expression:

         RichIterable<Integer> integers =
             Lists.mutable.with(1, 2, 3).collectWith((each, parameter) -> each + parameter, Integer.valueOf(1));
         

        Example using an anonymous inner class:

         Function2<Integer, Integer, Integer> addParameterFunction =
             new Function2<Integer, Integer, Integer>()
             {
                 public Integer value(Integer each, Integer parameter)
                 {
                     return each + parameter;
                 }
             };
         RichIterable<Integer> integers =
             Lists.mutable.with(1, 2, 3).collectWith(addParameterFunction, Integer.valueOf(1));
         
        Specified by:
        collectWith in interface RichIterable<T>
        Parameters:
        function - A Function2 to use as the collect transformation function
        parameter - A parameter to pass in for evaluation of the second argument P in function
        Returns:
        A new RichIterable that contains the transformed elements returned by Function2.value(Object, Object)
        See Also:
        RichIterable.collect(Function)
      • collectIf

        <V> OrderedIterable<V> collectIf​(Predicate<? super T> predicate,
                                         Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        Returns a new collection with the results of applying the specified function on each element of the source collection, but only for those elements which return true upon evaluation of the predicate. This is the optimized equivalent of calling iterable.select(predicate).collect(function).

        Example using a Java 8 lambda and method reference:

         RichIterable<String> strings = Lists.mutable.with(1, 2, 3).collectIf(e -> e != null, Object::toString);
         

        Example using Predicates factory:

         RichIterable<String> strings = Lists.mutable.with(1, 2, 3).collectIf(Predicates.notNull(), Functions.getToString());
         
        Specified by:
        collectIf in interface RichIterable<T>
      • flatCollect

        <V> OrderedIterable<V> flatCollect​(Function<? super T,​? extends java.lang.Iterable<V>> function)
        Description copied from interface: RichIterable
        flatCollect is a special case of RichIterable.collect(Function). With collect, when the Function returns a collection, the result is a collection of collections. flatCollect outputs a single "flattened" collection instead. This method is commonly called flatMap.

        Consider the following example where we have a Person class, and each Person has a list of Address objects. Take the following Function:

         Function<Person, List<Address>> addressFunction = Person::getAddresses;
         RichIterable<Person> people = ...;
         
        Using collect returns a collection of collections of addresses.
         RichIterable<List<Address>> addresses = people.collect(addressFunction);
         
        Using flatCollect returns a single flattened list of addresses.
         RichIterable<Address> addresses = people.flatCollect(addressFunction);
         
        Specified by:
        flatCollect in interface RichIterable<T>
        Parameters:
        function - The Function to apply
        Returns:
        a new flattened collection produced by applying the given function
      • collectBoolean

        OrderedBooleanIterable collectBoolean​(BooleanFunction<? super T> booleanFunction)
        Description copied from interface: RichIterable
        Returns a new primitive boolean iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.

        Example using a Java 8 lambda expression:

         BooleanIterable licenses =
             people.collectBoolean(person -> person.hasDrivingLicense());
         

        Example using an anonymous inner class:

         BooleanIterable licenses =
             people.collectBoolean(new BooleanFunction<Person>()
             {
                 public boolean booleanValueOf(Person person)
                 {
                     return person.hasDrivingLicense();
                 }
             });
         
        Specified by:
        collectBoolean in interface RichIterable<T>
      • collectByte

        OrderedByteIterable collectByte​(ByteFunction<? super T> byteFunction)
        Description copied from interface: RichIterable
        Returns a new primitive byte iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.

        Example using a Java 8 lambda expression:

         ByteIterable bytes =
             people.collectByte(person -> person.getCode());
         

        Example using an anonymous inner class:

         ByteIterable bytes =
             people.collectByte(new ByteFunction<Person>()
             {
                 public byte byteValueOf(Person person)
                 {
                     return person.getCode();
                 }
             });
         
        Specified by:
        collectByte in interface RichIterable<T>
      • collectChar

        OrderedCharIterable collectChar​(CharFunction<? super T> charFunction)
        Description copied from interface: RichIterable
        Returns a new primitive char iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.

        Example using a Java 8 lambda expression:

         CharIterable chars =
             people.collectChar(person -> person.getMiddleInitial());
         

        Example using an anonymous inner class:

         CharIterable chars =
             people.collectChar(new CharFunction<Person>()
             {
                 public char charValueOf(Person person)
                 {
                     return person.getMiddleInitial();
                 }
             });
         
        Specified by:
        collectChar in interface RichIterable<T>
      • collectDouble

        OrderedDoubleIterable collectDouble​(DoubleFunction<? super T> doubleFunction)
        Description copied from interface: RichIterable
        Returns a new primitive double iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.

        Example using a Java 8 lambda expression:

         DoubleIterable doubles =
             people.collectDouble(person -> person.getMilesFromNorthPole());
         

        Example using an anonymous inner class:

         DoubleIterable doubles =
             people.collectDouble(new DoubleFunction<Person>()
             {
                 public double doubleValueOf(Person person)
                 {
                     return person.getMilesFromNorthPole();
                 }
             });
         
        Specified by:
        collectDouble in interface RichIterable<T>
      • collectFloat

        OrderedFloatIterable collectFloat​(FloatFunction<? super T> floatFunction)
        Description copied from interface: RichIterable
        Returns a new primitive float iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.

        Example using a Java 8 lambda expression:

         FloatIterable floats =
             people.collectFloat(person -> person.getHeightInInches());
         

        Example using an anonymous inner class:

         FloatIterable floats =
             people.collectFloat(new FloatFunction<Person>()
             {
                 public float floatValueOf(Person person)
                 {
                     return person.getHeightInInches();
                 }
             });
         
        Specified by:
        collectFloat in interface RichIterable<T>
      • collectInt

        OrderedIntIterable collectInt​(IntFunction<? super T> intFunction)
        Description copied from interface: RichIterable
        Returns a new primitive int iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.

        Example using a Java 8 lambda expression:

         IntIterable ints =
             people.collectInt(person -> person.getAge());
         

        Example using an anonymous inner class:

         IntIterable ints =
             people.collectInt(new IntFunction<Person>()
             {
                 public int intValueOf(Person person)
                 {
                     return person.getAge();
                 }
             });
         
        Specified by:
        collectInt in interface RichIterable<T>
      • collectLong

        OrderedLongIterable collectLong​(LongFunction<? super T> longFunction)
        Description copied from interface: RichIterable
        Returns a new primitive long iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.

        Example using a Java 8 lambda expression:

         LongIterable longs =
             people.collectLong(person -> person.getGuid());
         

        Example using an anonymous inner class:

         LongIterable longs =
             people.collectLong(new LongFunction<Person>()
             {
                 public long longValueOf(Person person)
                 {
                     return person.getGuid();
                 }
             });
         
        Specified by:
        collectLong in interface RichIterable<T>
      • collectShort

        OrderedShortIterable collectShort​(ShortFunction<? super T> shortFunction)
        Description copied from interface: RichIterable
        Returns a new primitive short iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.

        Example using a Java 8 lambda expression:

         ShortIterable shorts =
             people.collectShort(person -> person.getNumberOfJunkMailItemsReceivedPerMonth());
         

        Example using an anonymous inner class:

         ShortIterable shorts =
             people.collectShort(new ShortFunction<Person>()
             {
                 public short shortValueOf(Person person)
                 {
                     return person.getNumberOfJunkMailItemsReceivedPerMonth();
                 }
             });
         
        Specified by:
        collectShort in interface RichIterable<T>
      • detectIndex

        int detectIndex​(Predicate<? super T> predicate)
        Returns the index of the first element of the OrderedIterable for which the predicate evaluates to true. Returns -1 if no element evaluates true for the predicate.
        Since:
        6.0
      • groupBy

        <V> OrderedIterableMultimap<V,​T> groupBy​(Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        For each element of the iterable, the function is evaluated and the results of these evaluations are collected into a new multimap, where the transformed value is the key and the original values are added to the same (or similar) species of collection as the source iterable.

        Example using a Java 8 method reference:

         Multimap<String, Person> peopleByLastName =
             people.groupBy(Person::getLastName);
         

        Example using an anonymous inner class:

         Multimap<String, Person> peopleByLastName =
             people.groupBy(new Function<Person, String>()
             {
                 public String valueOf(Person person)
                 {
                     return person.getLastName();
                 }
             });
         
        Specified by:
        groupBy in interface RichIterable<T>
      • zip

        <S> OrderedIterable<Pair<T,​S>> zip​(java.lang.Iterable<S> that)
        Returns a OrderedIterable formed from this OrderedIterable and another Iterable by combining corresponding elements in pairs. The second Iterable should also be ordered. If one of the two Iterables is longer than the other, its remaining elements are ignored.
        Specified by:
        zip in interface RichIterable<T>
        Type Parameters:
        S - the type of the second half of the returned pairs
        Parameters:
        that - The Iterable providing the second half of each result pair
        Returns:
        A new OrderedIterable containing pairs consisting of corresponding elements of this OrderedIterable and that. The length of the returned OrderedIterable is the minimum of the lengths of this OrderedIterable and that.
      • zip

        <S,​R extends java.util.Collection<Pair<T,​S>>> R zip​(java.lang.Iterable<S> that,
                                                                        R target)
        Same as zip(Iterable) but uses target for output.
        Specified by:
        zip in interface RichIterable<T>