org.apache.tomcat.util.digester
public class ArrayStack extends java.util.ArrayList
Imported copy of the ArrayStack class from
Commons Collections, which was the only direct dependency from Digester.
WARNNG - This class is public solely to allow it to be
used from subpackages of org.apache.commons.digester.
It should not be considered part of the public API of Commons Digester.
If you want to use such a class yourself, you should use the one from
Commons Collections directly.
An implementation of the Stack API that is based on an
ArrayList instead of a Vector, so it is not
synchronized to protect against multi-threaded access. The implementation
is therefore operates faster in environments where you do not need to
worry about multiple thread contention.
Unlike Stack, ArrayStack accepts null entries.
Stack,
Serialized Form| Constructor and Description |
|---|
ArrayStack()
Constructs a new empty
ArrayStack. |
ArrayStack(int initialSize)
Constructs a new empty
ArrayStack with an initial size. |
| Modifier and Type | Method and Description |
|---|---|
boolean |
empty()
Return
true if this stack is currently empty. |
java.lang.Object |
peek()
Returns the top item off of this stack without removing it.
|
java.lang.Object |
peek(int n)
Returns the n'th item down (zero-relative) from the top of this
stack without removing it.
|
java.lang.Object |
pop()
Pops the top item off of this stack and return it.
|
java.lang.Object |
push(java.lang.Object item)
Pushes a new item onto the top of this stack.
|
int |
search(java.lang.Object object)
Returns the one-based position of the distance from the top that the
specified object exists on this stack, where the top-most element is
considered to be at distance
1. |
add, add, addAll, addAll, clear, clone, contains, ensureCapacity, get, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, removeRange, retainAll, set, size, subList, toArray, toArray, trimToSizepublic ArrayStack()
ArrayStack. The initial size
is controlled by ArrayList and is currently 10.public ArrayStack(int initialSize)
ArrayStack with an initial size.initialSize - the initial size to usejava.lang.IllegalArgumentException - if the specified initial size
is negativepublic boolean empty()
true if this stack is currently empty.
This method exists for compatibility with java.util.Stack.
New users of this class should use isEmpty instead.
public java.lang.Object peek()
throws java.util.EmptyStackException
java.util.EmptyStackException - if the stack is emptypublic java.lang.Object peek(int n)
throws java.util.EmptyStackException
n - the number of items down to gojava.util.EmptyStackException - if there are not enough items on the
stack to satisfy this requestpublic java.lang.Object pop()
throws java.util.EmptyStackException
java.util.EmptyStackException - if the stack is emptypublic java.lang.Object push(java.lang.Object item)
add.item - the item to be addedpublic int search(java.lang.Object object)
1. If the object is not
present on the stack, return -1 instead. The
equals() method is used to compare to the items
in this stack.object - the object to be searched forCopyright © 2000-2013 Apache Software Foundation. All Rights Reserved.