Example usage for java.lang Iterable Iterable

Introduction

In this page you can find the example usage for java.lang Iterable Iterable.

Prototype

Iterable

Source Link

Usage

From source file:Main.java

public static <E> Iterable<E> asIterable(final Iterator<E> i) {
    return new Iterable<E>() {
        @Override// www.j a  v  a  2  s  . c o  m
        public Iterator<E> iterator() {
            return i;
        }
    };
}

From source file:Main.java

public static <T> Iterable<T> iterableOf(final Iterator<T> keys) {
    return new Iterable<T>() {
        public Iterator<T> iterator() {
            return keys;
        }/*from w w  w  . j ava  2s. com*/

    };
}

From source file:Main.java

public static <T> Iterable<T> makeEmptyIterable() {
    return new Iterable<T>() {
        public Iterator<T> iterator() {
            return new Iterator<T>() {
                public boolean hasNext() {
                    return false;
                }/*  w ww  .  j  a v a 2 s .  com*/

                public T next() {
                    return null;
                }

                public void remove() {
                    throw new UnsupportedOperationException("remove not allowed");
                }
            };
        }
    };
}

From source file:Main.java

public static <T> Iterable<T> asIterable(final Iterator<T> iterator) {
    return new Iterable<T>() {
        boolean called = false;

        @Override/*  ww  w.j av  a2 s  .c om*/
        public Iterator<T> iterator() {
            if (called) {
                throw new IllegalArgumentException("wrapped iterable twice iterator call");
            }
            called = true;

            return iterator;
        }
    };
}

From source file:Main.java

public static <T> Iterable<T> asIterable(final T[] a) {
    return new Iterable<T>() {
        @Override//from w  w w . jav  a  2s . co m
        public Iterator<T> iterator() {
            return new Iterator<T>() {
                int index = 0;

                @Override
                public boolean hasNext() {
                    return index < a.length;
                }

                @Override
                public T next() {
                    if (!hasNext()) {
                        throw new NoSuchElementException();
                    }
                    return a[index++];
                }

                @Override
                public void remove() {
                    throw new UnsupportedOperationException("Not supported yet.");
                }
            };
        }
    };
}

From source file:Main.java

public static <T> Iterable<T> cycle(final Iterable<T> it) {
    return new Iterable<T>() {

        public Iterator<T> iterator() {
            return new Iterator<T>() {

                private Iterator<T> nextCycle = it.iterator();

                public boolean hasNext() {
                    return true; // forever cycles
                }/*from w  ww . j a  va2 s.c  om*/

                public T next() {
                    if (!nextCycle.hasNext()) {
                        nextCycle = it.iterator(); // create the next cycle
                    }
                    return nextCycle.next();
                }
            };
        }
    };
}

From source file:Main.java

public static <T> List<T> iteratorToList(final Iterator<T> iterator) {
    List<T> list = new ArrayList<T>();
    for (T element : new Iterable<T>() {
        public Iterator<T> iterator() {
            return iterator;
        }//from w  ww . j  av  a  2s . co  m
    }) {
        list.add(element);
    }
    return list;
}

From source file:Main.java

public static <T> Iterable<T> concat(Iterable<T> first, Iterable<T> second) {

    return new Iterable<T>() {

        final Iterator<T> it1 = first.iterator();
        final Iterator<T> it2 = second.iterator();

        @Override/*  w  w  w  .j  ava 2  s .  com*/
        public Iterator<T> iterator() {

            return new Iterator<T>() {

                Iterator<T> curr;

                @Override
                public boolean hasNext() {
                    if (it1.hasNext()) {
                        curr = it1;
                        return true;
                    } else if (it2.hasNext()) {
                        curr = it2;
                        return true;
                    }
                    return false;
                }

                @Override
                public T next() {
                    return curr.next();
                }
            };
        }
    };
}

From source file:Main.java

public static <E> Iterable<E> reverse(final List<E> list) {
    return new Iterable<E>() {
        @Override//from  www . j  a  v  a 2s .c  o m
        public Iterator<E> iterator() {
            final ListIterator<E> it = list.listIterator(list.size());

            return new Iterator<E>() {
                @Override
                public boolean hasNext() {
                    return it.hasPrevious();
                }

                @Override
                public E next() {
                    return it.previous();
                }

                @Override
                public void remove() {
                    it.remove();
                }
            };
        }
    };
}

From source file:Main.java

public static <T> Iterable<T> replicate(final T value, final int count) {
    return new Iterable<T>() {
        @Override// w w  w  .java 2  s  .  co  m
        public Iterator<T> iterator() {
            return new Iterator<T>() {
                int remaining = count;

                @Override
                public boolean hasNext() {
                    return remaining > 0;
                }

                @Override
                public T next() {
                    if (remaining-- <= 0)
                        throw new NoSuchElementException();
                    return value;
                }

                @Override
                public void remove() {
                    throw new UnsupportedOperationException();
                }
            };
        }
    };
}