Class NonNullElementWrapperList<E>

  • All Implemented Interfaces:
    java.lang.Iterable<E>, java.util.Collection<E>, java.util.List<E>, java.util.RandomAccess

    public class NonNullElementWrapperList<E>
    extends java.util.AbstractList<E>
    implements java.util.RandomAccess
    List which wraps another List but prevents insertion of null elements. Methods which only perform checks with the element argument (e.g. contains(Object)) do not throw exceptions for null arguments.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      private java.util.ArrayList<E> delegate  
      • Fields inherited from class java.util.AbstractList

        modCount
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void add​(int index, E element)  
      void clear()  
      boolean contains​(java.lang.Object o)  
      boolean equals​(java.lang.Object o)  
      E get​(int index)  
      int hashCode()  
      int indexOf​(java.lang.Object o)  
      int lastIndexOf​(java.lang.Object o)  
      private E nonNull​(E element)  
      E remove​(int index)  
      boolean remove​(java.lang.Object o)  
      boolean removeAll​(java.util.Collection<?> c)  
      boolean retainAll​(java.util.Collection<?> c)  
      E set​(int index, E element)  
      int size()  
      java.lang.Object[] toArray()  
      <T> T[] toArray​(T[] a)  
      • Methods inherited from class java.util.AbstractList

        add, addAll, iterator, listIterator, listIterator, removeRange, subList
      • Methods inherited from class java.util.AbstractCollection

        addAll, containsAll, isEmpty, toString
      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait
      • Methods inherited from interface java.util.List

        addAll, containsAll, isEmpty
    • Field Detail

      • delegate

        private final java.util.ArrayList<E> delegate
    • Constructor Detail

      • NonNullElementWrapperList

        public NonNullElementWrapperList​(java.util.ArrayList<E> delegate)
    • Method Detail

      • get

        public E get​(int index)
        Specified by:
        get in interface java.util.List<E>
        Specified by:
        get in class java.util.AbstractList<E>
      • size

        public int size()
        Specified by:
        size in interface java.util.Collection<E>
        Specified by:
        size in interface java.util.List<E>
        Specified by:
        size in class java.util.AbstractCollection<E>
      • nonNull

        private E nonNull​(E element)
      • set

        public E set​(int index,
                     E element)
        Specified by:
        set in interface java.util.List<E>
        Overrides:
        set in class java.util.AbstractList<E>
      • add

        public void add​(int index,
                        E element)
        Specified by:
        add in interface java.util.List<E>
        Overrides:
        add in class java.util.AbstractList<E>
      • remove

        public E remove​(int index)
        Specified by:
        remove in interface java.util.List<E>
        Overrides:
        remove in class java.util.AbstractList<E>
      • clear

        public void clear()
        Specified by:
        clear in interface java.util.Collection<E>
        Specified by:
        clear in interface java.util.List<E>
        Overrides:
        clear in class java.util.AbstractList<E>
      • remove

        public boolean remove​(java.lang.Object o)
        Specified by:
        remove in interface java.util.Collection<E>
        Specified by:
        remove in interface java.util.List<E>
        Overrides:
        remove in class java.util.AbstractCollection<E>
      • removeAll

        public boolean removeAll​(java.util.Collection<?> c)
        Specified by:
        removeAll in interface java.util.Collection<E>
        Specified by:
        removeAll in interface java.util.List<E>
        Overrides:
        removeAll in class java.util.AbstractCollection<E>
      • retainAll

        public boolean retainAll​(java.util.Collection<?> c)
        Specified by:
        retainAll in interface java.util.Collection<E>
        Specified by:
        retainAll in interface java.util.List<E>
        Overrides:
        retainAll in class java.util.AbstractCollection<E>
      • contains

        public boolean contains​(java.lang.Object o)
        Specified by:
        contains in interface java.util.Collection<E>
        Specified by:
        contains in interface java.util.List<E>
        Overrides:
        contains in class java.util.AbstractCollection<E>
      • indexOf

        public int indexOf​(java.lang.Object o)
        Specified by:
        indexOf in interface java.util.List<E>
        Overrides:
        indexOf in class java.util.AbstractList<E>
      • lastIndexOf

        public int lastIndexOf​(java.lang.Object o)
        Specified by:
        lastIndexOf in interface java.util.List<E>
        Overrides:
        lastIndexOf in class java.util.AbstractList<E>
      • toArray

        public java.lang.Object[] toArray()
        Specified by:
        toArray in interface java.util.Collection<E>
        Specified by:
        toArray in interface java.util.List<E>
        Overrides:
        toArray in class java.util.AbstractCollection<E>
      • toArray

        public <T> T[] toArray​(T[] a)
        Specified by:
        toArray in interface java.util.Collection<E>
        Specified by:
        toArray in interface java.util.List<E>
        Overrides:
        toArray in class java.util.AbstractCollection<E>
      • equals

        public boolean equals​(java.lang.Object o)
        Specified by:
        equals in interface java.util.Collection<E>
        Specified by:
        equals in interface java.util.List<E>
        Overrides:
        equals in class java.util.AbstractList<E>
      • hashCode

        public int hashCode()
        Specified by:
        hashCode in interface java.util.Collection<E>
        Specified by:
        hashCode in interface java.util.List<E>
        Overrides:
        hashCode in class java.util.AbstractList<E>