Examples of java.util.Stack.peek()

java.util.Stack.peek()
Looks at the object at the top of this stack without removing it from the stack. @return the object at the top of this stack (the last itemof the Vector object). @exception EmptyStackException if this stack is empty.


    if (txs != null)
    {
      try
      {
        return (BasicAction) txs.peek();
      }
      catch (EmptyStackException e)
      {
      }
    }

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     */
    public String lookupNamespace(String prefix)
    {
        final Stack stack = (Stack) m_namespaces.get(prefix);
        return stack != null && !stack.isEmpty() ? 
            ((MappingRecord) stack.peek()).m_uri : null;
    }
    
    MappingRecord getMappingFromPrefix(String prefix) {
        final Stack stack = (Stack) m_namespaces.get(prefix);
        return stack != null && !stack.isEmpty() ?

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    }
    
    MappingRecord getMappingFromPrefix(String prefix) {
        final Stack stack = (Stack) m_namespaces.get(prefix);
        return stack != null && !stack.isEmpty() ? 
            ((MappingRecord) stack.peek()) : null;
    }


    /**
     * Given a namespace uri, and the namespaces mappings for the 
     * current element, return the current prefix for that uri.

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        if ((stack = (Stack) m_namespaces.get(prefix)) == null)
        {
            m_namespaces.put(prefix, stack = new Stack());
        }


        if (!stack.empty() && uri.equals(((MappingRecord)stack.peek()).m_uri))
        {
            return false;
        }
        MappingRecord map = new MappingRecord(prefix,uri,elemDepth);
        stack.push(map);

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   */
  public static JbpmContext getCurrentJbpmContext() {
    JbpmContext currentJbpmContext = null;
    Stack stack = getStack();
    if (! stack.isEmpty()) {
      currentJbpmContext = (JbpmContext) stack.peek();
    }
    return currentJbpmContext;
  }


  // convenience methods //////////////////////////////////////////////////////

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  }
  public static ExecutionContext currentExecutionContext() {
    ExecutionContext executionContext = null;
    Stack stack = getContextStack();
    if (! stack.isEmpty()) {
      executionContext = (ExecutionContext) stack.peek();
    }
    return executionContext;
  }
}

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                // if we pushed an error handler, pop it from the fault stack
                // before we exit normally without an exception
                if (errorHandlerMediator != null) {
                    Stack faultStack = synCtx.getFaultStack();
                    if (faultStack != null && !faultStack.isEmpty()) {
                        Object o = faultStack.peek();


                        if (o instanceof MediatorFaultHandler &&
                                errorHandlerMediator.equals(
                                        ((MediatorFaultHandler) o).getFaultMediator())) {
                            faultStack.pop();

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     * @return a call frame
     */
    public static CallFrame getCurrentFrame() {
        final Stack stack = (Stack) callStack.get();
        if (stack != null && !stack.isEmpty()) {
            return (CallFrame) stack.peek();
        }


        return null;
    }

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        }


        // -------------------------
        // Make the menu path string
        // -------------------------
        SimpleParser.Record menu = (SimpleParser.Record) menus.peek();
        String pathString = "";
        String helpId = null;


        // The title of the main menu
        String label = ((SimpleParser.Record) menus.get(0)).getString(TITLE, false);

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            namespaces.push(namespace);
            contentHandler.startPrefixMapping(prefix, namespace);
            mapped = true;
        } else {
            if (namespaces.isEmpty() ||
                    !namespace.equals(namespaces.peek().toString())) {
                // The prefix is mapped to a different namespace or nothing is
                // mapped to it - start the mapping
                namespaces.push(namespace);
                contentHandler.startPrefixMapping(prefix, namespace);
                mapped = true;

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