org.ejen
Class EjenContextsStack
java.lang.Object
|
+--java.util.AbstractCollection
|
+--java.util.AbstractList
|
+--java.util.Vector
|
+--java.util.Stack
|
+--org.ejen.EjenContextsStack
- All Implemented Interfaces:
- Cloneable, Collection, List, RandomAccess, Serializable
- public class EjenContextsStack
- extends Stack
Ejen context stack class. Defines a global context (an Hashtable)
and a stack of local contexts.
- Version:
- 1.0
- Author:
- F. Wolff
- See Also:
- Serialized Form
Method Summary |
Object |
globalGet(String name)
Returns the value to which the specified name is mapped in the
global context of this EjenContextsStack. |
Object |
globalPut(String name,
Object value)
Maps the specified name to the specified value in the global context of this
EjenContextsStack. |
EjenContext |
peekContext()
Looks at the EjenContext at the top of this EjenContextsStack without
removing it from the stack. |
EjenContext |
peekContext(int index)
Returns the EjenContext at the specified position in this EjenContextsStack. |
EjenContext |
popContext()
Removes the EjenContext at the top of this EjenContextsStack and returns
that EjenContext as the value of this function. |
EjenContext |
pushContext(EjenContext ctx)
Pushes an EjenContext onto the top of this EjenContextsStack. |
Methods inherited from class java.util.Vector |
add, add, addAll, addAll, addElement, capacity, clear, clone, contains, containsAll, copyInto, elementAt, elements, ensureCapacity, equals, firstElement, get, hashCode, indexOf, indexOf, insertElementAt, isEmpty, lastElement, lastIndexOf, lastIndexOf, remove, remove, removeAll, removeAllElements, removeElement, removeElementAt, removeRange, retainAll, set, setElementAt, setSize, size, subList, toArray, toArray, toString, trimToSize |
EjenContextsStack
public EjenContextsStack()
peekContext
public EjenContext peekContext()
- Looks at the EjenContext at the top of this EjenContextsStack without
removing it from the stack.
- Returns:
- the EjenContext at the top of this EjenContextsStack.
- Throws:
EmptyStackException
- if this EjenContextsStack is empty.
peekContext
public EjenContext peekContext(int index)
- Returns the EjenContext at the specified position in this EjenContextsStack.
- Parameters:
index
- index of EjenContext to return.
- Returns:
- the EjenContext at the top of this EjenContextsStack.
- Throws:
ArrayIndexOutOfBoundsException
- index is out of range
(index < 0 || index >= size()).
popContext
public EjenContext popContext()
- Removes the EjenContext at the top of this EjenContextsStack and returns
that EjenContext as the value of this function.
- Returns:
- the EjenContext at the top of this EjenContextsStack.
- Throws:
EmptyStackException
- if this EjenContextsStack is empty.
pushContext
public EjenContext pushContext(EjenContext ctx)
- Pushes an EjenContext onto the top of this EjenContextsStack.
- Parameters:
ctx
- the EjenContext to be pushed onto this EjenContextsStack.
- Returns:
- the ctx argument.
globalGet
public Object globalGet(String name)
- Returns the value to which the specified name is mapped in the
global context of this EjenContextsStack.
- Parameters:
name
- a name (key) in the global context (which is an Hashtable).
- Returns:
- the value to which the name is mapped in this global context; null
if the name is not mapped to any value in this global context.
globalPut
public Object globalPut(String name,
Object value)
- Maps the specified name to the specified value in the global context of this
EjenContextsStack. Neither the name nor the value can be null.
- Parameters:
name
- a name (key) in the global context.value
- the value.
- Returns:
- the previous value of the specified name in this global context, or
null if it did not have one.