Package org.apache.commons.collections

Class CursorableLinkedList

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Iterable, java.util.Collection, java.util.List
    @Deprecated(since="2021-04-30")
public class CursorableLinkedList
extends java.lang.Object
implements java.util.List, java.io.Serializable
    Deprecated.
    Use new version in list subpackage, which has been rewritten and now returns the cursor from the listIterator method. Will be removed in v4.0
    A doubly-linked list implementation of the List interface, supporting a ListIterator that allows concurrent modifications to the underlying list.

    Implements all of the optional List operations, the stack/queue/dequeue operations available in LinkedList and supports a ListIterator that allows concurrent modifications to the underlying list (see cursor()).

    Note that this implementation is not synchronized.

    Since:
    Commons Collections 1.0
    See Also:
    LinkedList, Serialized Form

    • Method Summary

      All Methods Instance Methods Concrete Methods Deprecated Methods 
      Modifier and Type Method Description
      void add​(int index, java.lang.Object element)
      Deprecated.
      Inserts the specified element at the specified position in this list.
      boolean add​(java.lang.Object o)
      Deprecated.
      Appends the specified element to the end of this list.
      boolean addAll​(int index, java.util.Collection c)
      Deprecated.
      Inserts all of the elements in the specified collection into this list at the specified position.
      boolean addAll​(java.util.Collection c)
      Deprecated.
      Appends all of the elements in the specified collection to the end of this list, in the order that they are returned by the specified Collection's Iterator.
      boolean addFirst​(java.lang.Object o)
      Deprecated.
      Inserts the specified element at the beginning of this list.
      boolean addLast​(java.lang.Object o)
      Deprecated.
      Inserts the specified element at the end of this list.
      void clear()
      Deprecated.
      Removes all of the elements from this list.
      boolean contains​(java.lang.Object o)
      Deprecated.
      Returns true if this list contains the specified element.
      boolean containsAll​(java.util.Collection c)
      Deprecated.
      Returns true if this list contains all of the elements of the specified collection.
      CursorableLinkedList.Cursor cursor()
      Deprecated.
      Returns a ListIterator for iterating through the elements of this list.
      CursorableLinkedList.Cursor cursor​(int i)
      Deprecated.
      Returns a ListIterator for iterating through the elements of this list, initialized such that ListIterator.next() will return the element at the specified index (if any) and ListIterator.previous() will return the element immediately preceding it (if any).
      boolean equals​(java.lang.Object o)
      Deprecated.
      Compares the specified object with this list for equality.
      java.lang.Object get​(int index)
      Deprecated.
      Returns the element at the specified position in this list.
      java.lang.Object getFirst()
      Deprecated.
      Returns the element at the beginning of this list.
      java.lang.Object getLast()
      Deprecated.
      Returns the element at the end of this list.
      int hashCode()
      Deprecated.
      Returns the hash code value for this list.
      int indexOf​(java.lang.Object o)
      Deprecated.
      Returns the index in this list of the first occurrence of the specified element, or -1 if this list does not contain this element.
      boolean isEmpty()
      Deprecated.
      Returns true if this list contains no elements.
      java.util.Iterator iterator()
      Deprecated.
      Returns a fail-fast iterator.
      int lastIndexOf​(java.lang.Object o)
      Deprecated.
      Returns the index in this list of the last occurrence of the specified element, or -1 if this list does not contain this element.
      java.util.ListIterator listIterator()
      Deprecated.
      Returns a fail-fast ListIterator.
      java.util.ListIterator listIterator​(int index)
      Deprecated.
      Returns a fail-fast ListIterator.
      java.lang.Object remove​(int index)
      Deprecated.
      Removes the element at the specified position in this list (optional operation).
      boolean remove​(java.lang.Object o)
      Deprecated.
      Removes the first occurrence in this list of the specified element.
      boolean removeAll​(java.util.Collection c)
      Deprecated.
      Removes from this list all the elements that are contained in the specified collection.
      java.lang.Object removeFirst()
      Deprecated.
      Removes the first element of this list, if any.
      java.lang.Object removeLast()
      Deprecated.
      Removes the last element of this list, if any.
      boolean retainAll​(java.util.Collection c)
      Deprecated.
      Retains only the elements in this list that are contained in the specified collection.
      java.lang.Object set​(int index, java.lang.Object element)
      Deprecated.
      Replaces the element at the specified position in this list with the specified element.
      int size()
      Deprecated.
      Returns the number of elements in this list.
      java.util.List subList​(int i, int j)
      Deprecated.
      Returns a fail-fast sublist.
      java.lang.Object[] toArray()
      Deprecated.
      Returns an array containing all of the elements in this list in proper sequence.
      java.lang.Object[] toArray​(java.lang.Object[] a)
      Deprecated.
      Returns an array containing all of the elements in this list in proper sequence; the runtime type of the returned array is that of the specified array.
      java.lang.String toString()
      Deprecated.
      Returns a String representation of this list, suitable for debugging.

      • Methods inherited from class java.lang.Object

        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

        replaceAll, sort, spliterator

    • Constructor Detail

      • CursorableLinkedList

        public CursorableLinkedList()
        Deprecated.

    • Method Detail

      • add

        public boolean add​(java.lang.Object o)
        Deprecated.
        Appends the specified element to the end of this list.
        Specified by:
        add in interface java.util.Collection
        Specified by:
        add in interface java.util.List
        Parameters:
        o - element to be appended to this list.
        Returns:
        true

      • add

        public void add​(int index,
                java.lang.Object element)
        Deprecated.
        Inserts the specified element at the specified position in this list. Shifts the element currently at that position (if any) and any subsequent elements to the right (adds one to their indices).
        Specified by:
        add in interface java.util.List
        Parameters:
        index - index at which the specified element is to be inserted.
        element - element to be inserted.
        Throws:
        java.lang.ClassCastException - if the class of the specified element prevents it from being added to this list.
        java.lang.IllegalArgumentException - if some aspect of the specified element prevents it from being added to this list.
        java.lang.IndexOutOfBoundsException - if the index is out of range (index < 0 || index > size()).

      • addAll

        public boolean addAll​(java.util.Collection c)
        Deprecated.
        Appends all of the elements in the specified collection to the end of this list, in the order that they are returned by the specified Collection's Iterator. The behavior of this operation is unspecified if the specified collection is modified while the operation is in progress. (Note that this will occur if the specified collection is this list, and it's nonempty.)
        Specified by:
        addAll in interface java.util.Collection
        Specified by:
        addAll in interface java.util.List
        Parameters:
        c - collection whose elements are to be added to this list.
        Returns:
        true if this list changed as a result of the call.
        Throws:
        java.lang.ClassCastException - if the class of an element in the specified collection prevents it from being added to this list.
        java.lang.IllegalArgumentException - if some aspect of an element in the specified collection prevents it from being added to this list.

      • addAll

        public boolean addAll​(int index,
                      java.util.Collection c)
        Deprecated.
        Inserts all of the elements in the specified collection into this list at the specified position. Shifts the element currently at that position (if any) and any subsequent elements to the right (increases their indices). The new elements will appear in this list in the order that they are returned by the specified Collection's Iterator. The behavior of this operation is unspecified if the specified collection is modified while the operation is in progress. (Note that this will occur if the specified collection is this list, and it's nonempty.)
        Specified by:
        addAll in interface java.util.List
        Parameters:
        index - index at which to insert first element from the specified collection.
        c - elements to be inserted into this list.
        Returns:
        true if this list changed as a result of the call.
        Throws:
        java.lang.ClassCastException - if the class of one of elements of the specified collection prevents it from being added to this list.
        java.lang.IllegalArgumentException - if some aspect of one of elements of the specified collection prevents it from being added to this list.
        java.lang.IndexOutOfBoundsException - if the index is out of range (index < 0 || index > size()).

      • addFirst

        public boolean addFirst​(java.lang.Object o)
        Deprecated.
        Inserts the specified element at the beginning of this list. (Equivalent to add(0,o)).
        Parameters:
        o - element to be prepended to this list.
        Returns:
        true

      • addLast

        public boolean addLast​(java.lang.Object o)
        Deprecated.
        Inserts the specified element at the end of this list. (Equivalent to add(java.lang.Object)).
        Parameters:
        o - element to be appended to this list.
        Returns:
        true

      • clear

        public void clear()
        Deprecated.
        Removes all of the elements from this list. This list will be empty after this call returns (unless it throws an exception).
        Specified by:
        clear in interface java.util.Collection
        Specified by:
        clear in interface java.util.List

      • contains

        public boolean contains​(java.lang.Object o)
        Deprecated.
        Returns true if this list contains the specified element. More formally, returns true if and only if this list contains at least one element e such that (o==null ? e==null : o.equals(e)).
        Specified by:
        contains in interface java.util.Collection
        Specified by:
        contains in interface java.util.List
        Parameters:
        o - element whose presence in this list is to be tested.
        Returns:
        true if this list contains the specified element.

      • containsAll

        public boolean containsAll​(java.util.Collection c)
        Deprecated.
        Returns true if this list contains all of the elements of the specified collection.
        Specified by:
        containsAll in interface java.util.Collection
        Specified by:
        containsAll in interface java.util.List
        Parameters:
        c - collection to be checked for containment in this list.
        Returns:
        true if this list contains all of the elements of the specified collection.

      • cursor

        public CursorableLinkedList.Cursor cursor()
        Deprecated.
        Returns a ListIterator for iterating through the elements of this list. Unlike iterator(), a cursor is not bothered by concurrent modifications to the underlying list.

        Specifically, when elements are added to the list before or after the cursor, the cursor simply picks them up automatically. When the "current" (i.e., last returned by ListIterator.next() or ListIterator.previous()) element of the list is removed, the cursor automatically adjusts to the change (invalidating the last returned value--i.e., it cannot be removed).

        Note that the returned ListIterator does not support the ListIterator.nextIndex() and ListIterator.previousIndex() methods (they throw UnsupportedOperationException when invoked.

        Historical Note: In previous versions of this class, the object returned from this method was required to be explicitly closed. This is no longer necessary.

        See Also:
        cursor(int), listIterator(), CursorableLinkedList.Cursor

      • cursor

        public CursorableLinkedList.Cursor cursor​(int i)
        Deprecated.
        Returns a ListIterator for iterating through the elements of this list, initialized such that ListIterator.next() will return the element at the specified index (if any) and ListIterator.previous() will return the element immediately preceding it (if any). Unlike iterator(), a cursor is not bothered by concurrent modifications to the underlying list.
        Throws:
        java.lang.IndexOutOfBoundsException - if the index is out of range (index < 0 || index > size()).
        See Also:
        cursor(), listIterator(int), CursorableLinkedList.Cursor

      • equals

        public boolean equals​(java.lang.Object o)
        Deprecated.
        Compares the specified object with this list for equality. Returns true if and only if the specified object is also a list, both lists have the same size, and all corresponding pairs of elements in the two lists are equal. (Two elements e1 and e2 are equal if (e1==null ? e2==null : e1.equals(e2)).) In other words, two lists are defined to be equal if they contain the same elements in the same order. This definition ensures that the equals method works properly across different implementations of the List interface.
        Specified by:
        equals in interface java.util.Collection
        Specified by:
        equals in interface java.util.List
        Overrides:
        equals in class java.lang.Object
        Parameters:
        o - the object to be compared for equality with this list.
        Returns:
        true if the specified object is equal to this list.

      • get

        public java.lang.Object get​(int index)
        Deprecated.
        Returns the element at the specified position in this list.
        Specified by:
        get in interface java.util.List
        Parameters:
        index - index of element to return.
        Returns:
        the element at the specified position in this list.
        Throws:
        java.lang.IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size()).

      • getFirst

        public java.lang.Object getFirst()
        Deprecated.
        Returns the element at the beginning of this list.

      • getLast

        public java.lang.Object getLast()
        Deprecated.
        Returns the element at the end of this list.

      • hashCode

        public int hashCode()
        Deprecated.
        Returns the hash code value for this list. The hash code of a list is defined to be the result of the following calculation: 
          hashCode = 1;
  Iterator i = list.iterator();
  while (i.hasNext()) {
      Object obj = i.next();
      hashCode = 31*hashCode + (obj==null ? 0 : obj.hashCode());
  }
        This ensures that list1.equals(list2) implies that list1.hashCode()==list2.hashCode() for any two lists, list1 and list2, as required by the general contract of Object.hashCode.
        Specified by:
        hashCode in interface java.util.Collection
        Specified by:
        hashCode in interface java.util.List
        Overrides:
        hashCode in class java.lang.Object
        Returns:
        the hash code value for this list.
        See Also:
        Object.hashCode(), Object.equals(Object), equals(Object)

      • indexOf

        public int indexOf​(java.lang.Object o)
        Deprecated.
        Returns the index in this list of the first occurrence of the specified element, or -1 if this list does not contain this element. More formally, returns the lowest index i such that (o==null ? get(i)==null : o.equals(get(i))), or -1 if there is no such index.
        Specified by:
        indexOf in interface java.util.List
        Parameters:
        o - element to search for.
        Returns:
        the index in this list of the first occurrence of the specified element, or -1 if this list does not contain this element.

      • isEmpty

        public boolean isEmpty()
        Deprecated.
        Returns true if this list contains no elements.
        Specified by:
        isEmpty in interface java.util.Collection
        Specified by:
        isEmpty in interface java.util.List
        Returns:
        true if this list contains no elements.

      • iterator

        public java.util.Iterator iterator()
        Deprecated.
        Returns a fail-fast iterator.
        Specified by:
        iterator in interface java.util.Collection
        Specified by:
        iterator in interface java.lang.Iterable
        Specified by:
        iterator in interface java.util.List
        See Also:
        List.iterator()

      • lastIndexOf

        public int lastIndexOf​(java.lang.Object o)
        Deprecated.
        Returns the index in this list of the last occurrence of the specified element, or -1 if this list does not contain this element. More formally, returns the highest index i such that (o==null ? get(i)==null : o.equals(get(i))), or -1 if there is no such index.
        Specified by:
        lastIndexOf in interface java.util.List
        Parameters:
        o - element to search for.
        Returns:
        the index in this list of the last occurrence of the specified element, or -1 if this list does not contain this element.

      • listIterator

        public java.util.ListIterator listIterator()
        Deprecated.
        Returns a fail-fast ListIterator.
        Specified by:
        listIterator in interface java.util.List
        See Also:
        List.listIterator()

      • listIterator

        public java.util.ListIterator listIterator​(int index)
        Deprecated.
        Returns a fail-fast ListIterator.
        Specified by:
        listIterator in interface java.util.List
        See Also:
        List.listIterator(int)

      • remove

        public boolean remove​(java.lang.Object o)
        Deprecated.
        Removes the first occurrence in this list of the specified element. If this list does not contain the element, it is unchanged. More formally, removes the element with the lowest index i such that (o==null ? get(i)==null : o.equals(get(i))) (if such an element exists).
        Specified by:
        remove in interface java.util.Collection
        Specified by:
        remove in interface java.util.List
        Parameters:
        o - element to be removed from this list, if present.
        Returns:
        true if this list contained the specified element.

      • remove

        public java.lang.Object remove​(int index)
        Deprecated.
        Removes the element at the specified position in this list (optional operation). Shifts any subsequent elements to the left (subtracts one from their indices). Returns the element that was removed from the list.
        Specified by:
        remove in interface java.util.List
        Parameters:
        index - the index of the element to removed.
        Returns:
        the element previously at the specified position.
        Throws:
        java.lang.IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size()).

      • removeAll

        public boolean removeAll​(java.util.Collection c)
        Deprecated.
        Removes from this list all the elements that are contained in the specified collection.
        Specified by:
        removeAll in interface java.util.Collection
        Specified by:
        removeAll in interface java.util.List
        Parameters:
        c - collection that defines which elements will be removed from this list.
        Returns:
        true if this list changed as a result of the call.

      • removeFirst

        public java.lang.Object removeFirst()
        Deprecated.
        Removes the first element of this list, if any.

      • removeLast

        public java.lang.Object removeLast()
        Deprecated.
        Removes the last element of this list, if any.

      • retainAll

        public boolean retainAll​(java.util.Collection c)
        Deprecated.
        Retains only the elements in this list that are contained in the specified collection. In other words, removes from this list all the elements that are not contained in the specified collection.
        Specified by:
        retainAll in interface java.util.Collection
        Specified by:
        retainAll in interface java.util.List
        Parameters:
        c - collection that defines which elements this set will retain.
        Returns:
        true if this list changed as a result of the call.

      • set

        public java.lang.Object set​(int index,
                            java.lang.Object element)
        Deprecated.
        Replaces the element at the specified position in this list with the specified element.
        Specified by:
        set in interface java.util.List
        Parameters:
        index - index of element to replace.
        element - element to be stored at the specified position.
        Returns:
        the element previously at the specified position.
        Throws:
        java.lang.ClassCastException - if the class of the specified element prevents it from being added to this list.
        java.lang.IllegalArgumentException - if some aspect of the specified element prevents it from being added to this list.
        java.lang.IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size()).

      • size

        public int size()
        Deprecated.
        Returns the number of elements in this list.
        Specified by:
        size in interface java.util.Collection
        Specified by:
        size in interface java.util.List
        Returns:
        the number of elements in this list.

      • toArray

        public java.lang.Object[] toArray()
        Deprecated.
        Returns an array containing all of the elements in this list in proper sequence. Obeys the general contract of the Collection.toArray() method.
        Specified by:
        toArray in interface java.util.Collection
        Specified by:
        toArray in interface java.util.List
        Returns:
        an array containing all of the elements in this list in proper sequence.

      • toArray

        public java.lang.Object[] toArray​(java.lang.Object[] a)
        Deprecated.
        Returns an array containing all of the elements in this list in proper sequence; the runtime type of the returned array is that of the specified array. Obeys the general contract of the Collection.toArray() method.
        Specified by:
        toArray in interface java.util.Collection
        Specified by:
        toArray in interface java.util.List
        Parameters:
        a - the array into which the elements of this list are to be stored, if it is big enough; otherwise, a new array of the same runtime type is allocated for this purpose.
        Returns:
        an array containing the elements of this list.
        Throws:
        java.lang.ArrayStoreException - if the runtime type of the specified array is not a supertype of the runtime type of every element in this list.

      • toString

        public java.lang.String toString()
        Deprecated.
        Returns a String representation of this list, suitable for debugging.
        Overrides:
        toString in class java.lang.Object
        Returns:
        a String representation of this list, suitable for debugging.

      • subList

        public java.util.List subList​(int i,
                              int j)
        Deprecated.
        Returns a fail-fast sublist.
        Specified by:
        subList in interface java.util.List
        See Also:
        List.subList(int,int)