Package org.apache.commons.collections

Class BoundedFifoBuffer

  • All Implemented Interfaces:
    java.lang.Iterable, java.util.Collection, BoundedCollection, Buffer
    public class BoundedFifoBuffer
extends java.util.AbstractCollection
implements Buffer, BoundedCollection
    Deprecated.
    Moved to buffer subpackage. Due to be removed in v4.0.
    The BoundedFifoBuffer is a very efficient implementation of Buffer that does not alter the size of the buffer at runtime.

    The removal order of a BoundedFifoBuffer is based on the insertion order; elements are removed in the same order in which they were added. The iteration order is the same as the removal order.

    The add(Object), remove() and get() operations all perform in constant time. All other operations perform in linear time or worse.

    Note that this implementation is not synchronized. The following can be used to provide synchronized access to your BoundedFifoBuffer: 

       Buffer fifo = BufferUtils.synchronizedBuffer(new BoundedFifoBuffer());

    This buffer prevents null objects from being added.

    Since:
    2.1

    • Constructor Summary

      Constructors 
      Constructor Description
      BoundedFifoBuffer()
      Deprecated.
      Constructs a new BoundedFifoBuffer big enough to hold 32 elements.
      BoundedFifoBuffer​(int size)
      Deprecated.
      Constructs a new BoundedFifoBuffer big enough to hold the specified number of elements.
      BoundedFifoBuffer​(java.util.Collection coll)
      Deprecated.
      Constructs a new BoundedFifoBuffer big enough to hold all of the elements in the specified collection.

    • Method Summary

      All Methods Instance Methods Concrete Methods Deprecated Methods 
      Modifier and Type Method Description
      boolean add​(java.lang.Object element)
      Deprecated.
      Adds the given element to this buffer.
      void clear()
      Deprecated.
      Clears this buffer.
      java.lang.Object get()
      Deprecated.
      Returns the least recently inserted element in this buffer.
      boolean isEmpty()
      Deprecated.
      Returns true if this buffer is empty; false otherwise.
      boolean isFull()
      Deprecated.
      Returns true if this collection is full and no new elements can be added.
      java.util.Iterator iterator()
      Deprecated.
      Returns an iterator over this buffer's elements.
      int maxSize()
      Deprecated.
      Gets the maximum size of the collection (the bound).
      java.lang.Object remove()
      Deprecated.
      Removes the least recently inserted element from this buffer.
      int size()
      Deprecated.
      Returns the number of elements stored in the buffer.

      • Methods inherited from class java.util.AbstractCollection

        addAll, contains, containsAll, remove, removeAll, retainAll, toArray, toArray, toString

      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

      • Methods inherited from interface java.util.Collection

        addAll, contains, containsAll, equals, hashCode, parallelStream, remove, removeAll, removeIf, retainAll, spliterator, stream, toArray, toArray, toArray

      • Methods inherited from interface java.lang.Iterable

        forEach

    • Constructor Detail

      • BoundedFifoBuffer

        public BoundedFifoBuffer()
        Deprecated.
        Constructs a new BoundedFifoBuffer big enough to hold 32 elements.

      • BoundedFifoBuffer

        public BoundedFifoBuffer​(int size)
        Deprecated.
        Constructs a new BoundedFifoBuffer big enough to hold the specified number of elements.
        Parameters:
        size - the maximum number of elements for this fifo
        Throws:
        java.lang.IllegalArgumentException - if the size is less than 1

      • BoundedFifoBuffer

        public BoundedFifoBuffer​(java.util.Collection coll)
        Deprecated.
        Constructs a new BoundedFifoBuffer big enough to hold all of the elements in the specified collection. That collection's elements will also be added to the buffer.
        Parameters:
        coll - the collection whose elements to add, may not be null
        Throws:
        java.lang.NullPointerException - if the collection is null

    • Method Detail

      • size

        public int size()
        Deprecated.
        Returns the number of elements stored in the buffer.
        Specified by:
        size in interface java.util.Collection
        Specified by:
        size in class java.util.AbstractCollection
        Returns:
        this buffer's size

      • isEmpty

        public boolean isEmpty()
        Deprecated.
        Returns true if this buffer is empty; false otherwise.
        Specified by:
        isEmpty in interface java.util.Collection
        Overrides:
        isEmpty in class java.util.AbstractCollection
        Returns:
        true if this buffer is empty

      • isFull

        public boolean isFull()
        Deprecated.
        Returns true if this collection is full and no new elements can be added.
        Specified by:
        isFull in interface BoundedCollection
        Returns:
        true if the collection is full

      • maxSize

        public int maxSize()
        Deprecated.
        Gets the maximum size of the collection (the bound).
        Specified by:
        maxSize in interface BoundedCollection
        Returns:
        the maximum number of elements the collection can hold

      • clear

        public void clear()
        Deprecated.
        Clears this buffer.
        Specified by:
        clear in interface java.util.Collection
        Overrides:
        clear in class java.util.AbstractCollection

      • add

        public boolean add​(java.lang.Object element)
        Deprecated.
        Adds the given element to this buffer.
        Specified by:
        add in interface java.util.Collection
        Overrides:
        add in class java.util.AbstractCollection
        Parameters:
        element - the element to add
        Returns:
        true, always
        Throws:
        java.lang.NullPointerException - if the given element is null
        BufferOverflowException - if this buffer is full

      • get

        public java.lang.Object get()
        Deprecated.
        Returns the least recently inserted element in this buffer.
        Specified by:
        get in interface Buffer
        Returns:
        the least recently inserted element
        Throws:
        BufferUnderflowException - if the buffer is empty

      • remove

        public java.lang.Object remove()
        Deprecated.
        Removes the least recently inserted element from this buffer.
        Specified by:
        remove in interface Buffer
        Returns:
        the least recently inserted element
        Throws:
        BufferUnderflowException - if the buffer is empty

      • iterator

        public java.util.Iterator iterator()
        Deprecated.
        Returns an iterator over this buffer's elements.
        Specified by:
        iterator in interface java.util.Collection
        Specified by:
        iterator in interface java.lang.Iterable
        Specified by:
        iterator in class java.util.AbstractCollection
        Returns:
        an iterator over this buffer's elements