Package groovy.lang

Class EmptyRange<T extends java.lang.Comparable>

java.lang.Object
java.util.AbstractCollection<E>
java.util.AbstractList<T>
groovy.lang.EmptyRange<T>
All Implemented Interfaces:
Range<T>, java.lang.Iterable<T>, java.util.Collection<T>, java.util.List<T>
public class EmptyRange<T extends java.lang.Comparable>
extends java.util.AbstractList<T>
implements Range<T>
Constructing Ranges like 0..<0

  • Field Summary

    Fields
    Modifier and Type Field Description
    protected T at
    The value at which the range originates (may be null).

    Fields inherited from class java.util.AbstractList

    modCount

  • Constructor Summary

    Constructors
    Constructor Description
    EmptyRange​(T at)
    Creates a new EmptyRange.

  • Method Summary

    Modifier and Type Method Description
    boolean add​(T o)
    Always throws UnsupportedOperationException for an empty range.
    boolean addAll​(int index, java.util.Collection<? extends T> c)
    Always throws UnsupportedOperationException for an empty range.
    boolean addAll​(java.util.Collection<? extends T> c)
    Always throws UnsupportedOperationException for an empty range.
    boolean containsWithinBounds​(java.lang.Object o)
    Never true for an empty range.
    T get​(int index)
    Always throws IndexOutOfBoundsException for an empty range.
    T getFrom()
    The lower value in the range.
    T getTo()
    The upper value in the range.
    java.lang.String inspect()
    boolean isReverse()
    Never true for an empty range.
    T remove​(int index)
    Always throws UnsupportedOperationException for an empty range.
    boolean remove​(java.lang.Object o)
    Always throws UnsupportedOperationException for an empty range.
    boolean removeAll​(java.util.Collection<?> c)
    Always throws UnsupportedOperationException for an empty range.
    boolean retainAll​(java.util.Collection<?> c)
    Always throws UnsupportedOperationException for an empty range.
    T set​(int index, T element)
    Always throws UnsupportedOperationException for an empty range.
    int size()
    Always 0 for an empty range.
    java.util.List<T> step​(int step)
    Always returns an empty list for an empty range.
    void step​(int step, Closure closure)
    Always does nothing for an empty range.
    java.lang.String toString()

    Methods inherited from class java.util.AbstractList

    add, clear, equals, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, removeRange, subList

    Methods inherited from class java.util.AbstractCollection

    contains, containsAll, isEmpty, toArray, toArray

    Methods inherited from class java.lang.Object

    clone, finalize, getClass, notify, notifyAll, wait, wait, wait

    Methods inherited from interface java.util.Collection

    parallelStream, removeIf, stream, toArray

    Methods inherited from interface java.lang.Iterable

    forEach

    Methods inherited from interface java.util.List

    add, clear, contains, containsAll, equals, hashCode, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, replaceAll, sort, spliterator, subList, toArray, toArray

  • Field Details

    • at

      protected T extends java.lang.Comparable at
      The value at which the range originates (may be null).

  • Constructor Details

    • EmptyRange

      public EmptyRange​(T at)
      Creates a new EmptyRange.
      Parameters:
      at - the value at which the range starts (may be null).

  • Method Details

    • getFrom

      public T getFrom()
      The lower value in the range.
      Specified by:
      getFrom in interface Range<T extends java.lang.Comparable>
      Returns:
      the lower value in the range.

    • getTo

      public T getTo()
      The upper value in the range.
      Specified by:
      getTo in interface Range<T extends java.lang.Comparable>
      Returns:
      the upper value in the range

    • isReverse

      public boolean isReverse()
      Never true for an empty range.
      Specified by:
      isReverse in interface Range<T extends java.lang.Comparable>
      Returns:
      false

    • containsWithinBounds

      public boolean containsWithinBounds​(java.lang.Object o)
      Never true for an empty range.
      Specified by:
      containsWithinBounds in interface Range<T extends java.lang.Comparable>
      Parameters:
      o - the object to check against the boundaries of the range
      Returns:
      false

    • inspect

      public java.lang.String inspect()
      Specified by:
      inspect in interface Range<T extends java.lang.Comparable>
      Returns:
      the verbose String representation of this Range as would be typed into a console to create the Range instance

    • toString

      public java.lang.String toString()
      Overrides:
      toString in class java.util.AbstractCollection<T extends java.lang.Comparable>

    • size

      public int size()
      Always 0 for an empty range.
      Specified by:
      size in interface java.util.Collection<T extends java.lang.Comparable>
      Specified by:
      size in interface java.util.List<T extends java.lang.Comparable>
      Specified by:
      size in class java.util.AbstractCollection<T extends java.lang.Comparable>
      Returns:
      0

    • get

      public T get​(int index)
      Always throws IndexOutOfBoundsException for an empty range.
      Specified by:
      get in interface java.util.List<T extends java.lang.Comparable>
      Specified by:
      get in class java.util.AbstractList<T extends java.lang.Comparable>
      Throws:
      java.lang.IndexOutOfBoundsException - always

    • add

      public boolean add​(T o)
      Always throws UnsupportedOperationException for an empty range.
      Specified by:
      add in interface java.util.Collection<T extends java.lang.Comparable>
      Specified by:
      add in interface java.util.List<T extends java.lang.Comparable>
      Overrides:
      add in class java.util.AbstractList<T extends java.lang.Comparable>
      Throws:
      java.lang.UnsupportedOperationException - always

    • addAll

      public boolean addAll​(int index, java.util.Collection<? extends T> c)
      Always throws UnsupportedOperationException for an empty range.
      Specified by:
      addAll in interface java.util.List<T extends java.lang.Comparable>
      Overrides:
      addAll in class java.util.AbstractList<T extends java.lang.Comparable>
      Throws:
      java.lang.UnsupportedOperationException

    • addAll

      public boolean addAll​(java.util.Collection<? extends T> c)
      Always throws UnsupportedOperationException for an empty range.
      Specified by:
      addAll in interface java.util.Collection<T extends java.lang.Comparable>
      Specified by:
      addAll in interface java.util.List<T extends java.lang.Comparable>
      Overrides:
      addAll in class java.util.AbstractCollection<T extends java.lang.Comparable>
      Throws:
      java.lang.UnsupportedOperationException

    • remove

      public boolean remove​(java.lang.Object o)
      Always throws UnsupportedOperationException for an empty range.
      Specified by:
      remove in interface java.util.Collection<T extends java.lang.Comparable>
      Specified by:
      remove in interface java.util.List<T extends java.lang.Comparable>
      Overrides:
      remove in class java.util.AbstractCollection<T extends java.lang.Comparable>
      Throws:
      java.lang.UnsupportedOperationException

    • remove

      public T remove​(int index)
      Always throws UnsupportedOperationException for an empty range.
      Specified by:
      remove in interface java.util.List<T extends java.lang.Comparable>
      Overrides:
      remove in class java.util.AbstractList<T extends java.lang.Comparable>
      Throws:
      java.lang.UnsupportedOperationException

    • removeAll

      public boolean removeAll​(java.util.Collection<?> c)
      Always throws UnsupportedOperationException for an empty range.
      Specified by:
      removeAll in interface java.util.Collection<T extends java.lang.Comparable>
      Specified by:
      removeAll in interface java.util.List<T extends java.lang.Comparable>
      Overrides:
      removeAll in class java.util.AbstractCollection<T extends java.lang.Comparable>
      Throws:
      java.lang.UnsupportedOperationException

    • retainAll

      public boolean retainAll​(java.util.Collection<?> c)
      Always throws UnsupportedOperationException for an empty range.
      Specified by:
      retainAll in interface java.util.Collection<T extends java.lang.Comparable>
      Specified by:
      retainAll in interface java.util.List<T extends java.lang.Comparable>
      Overrides:
      retainAll in class java.util.AbstractCollection<T extends java.lang.Comparable>
      Throws:
      java.lang.UnsupportedOperationException

    • set

      public T set​(int index, T element)
      Always throws UnsupportedOperationException for an empty range.
      Specified by:
      set in interface java.util.List<T extends java.lang.Comparable>
      Overrides:
      set in class java.util.AbstractList<T extends java.lang.Comparable>
      Throws:
      java.lang.UnsupportedOperationException

    • step

      public void step​(int step, Closure closure)
      Always does nothing for an empty range.
      Specified by:
      step in interface Range<T extends java.lang.Comparable>
      Parameters:
      step - the amount by which to step. If negative, steps through the range backwards.
      closure - the Closure to call

    • step

      public java.util.List<T> step​(int step)
      Always returns an empty list for an empty range.
      Specified by:
      step in interface Range<T extends java.lang.Comparable>
      Parameters:
      step - the amount by which to step. If negative, steps through the range backwards.
      Returns:
      the list formed by stepping through the range by the indicated interval.