Examples of org.apache.commons.collections.ArrayStack

org.apache.commons.collections.ArrayStack
An implementation of the {@link java.util.Stack} API that is based on anArrayList 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. @author Craig R. McClanahan @version $Revision: 1.3 $ $Date: 2001/05/04 16:33:18 $ @see java.util.Stack

     */
    public synchronized File getBaseDirRelative() {
        // Must first convert to absolute path names to ensure parents are available
        File parent = new File(DEFAULT_BASE).getAbsoluteFile();
        File f = base.getAbsoluteFile();
        ArrayStack l = new ArrayStack();
        while (f != null) { 
            if (f.equals(parent)){
                if (l.isEmpty()){
                    break;
                }
                File rel = new File((String) l.pop());
                while(!l.isEmpty()) {
                    rel = new File(rel, (String) l.pop());
                }
                return rel;
            }
            l.push(f.getName());
            f = f.getParentFile(); 
        }
        return new File(".");
    }

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        buffer.addAll(Arrays.asList(getFullElements()));
        return UnmodifiableBuffer.decorate(buffer);
    }
    
    public Collection makeConfirmedCollection() {
        ArrayStack list = new ArrayStack();
        return list;
    }

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        ArrayStack list = new ArrayStack();
        return list;
    }


    public Collection makeConfirmedFullCollection() {
        ArrayStack list = new ArrayStack();
        list.addAll(Arrays.asList(getFullElements()));
        return list;
    }

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    public void begin(String namespace, String name, Attributes attributes) throws Exception {
        
        if (ignoreCreateExceptions) {
        
            if (exceptionIgnoredStack == null) {
                exceptionIgnoredStack = new ArrayStack();
            }
            
            try {
                Object instance = getFactory(attributes).createObject(attributes);

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        if (attributeName == null && !fromStack) {
            // We must wait to set the parameter until end
            // so that we can make sure that the right set of parameters
            // is at the top of the stack
            if (bodyTextStack == null) {
                bodyTextStack = new ArrayStack();
            }
            bodyTextStack.push(bodyText.trim());
        }


    }

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     *
     * @param prefix Prefix to look up
     */
    public String findNamespaceURI(String prefix) {
        
        ArrayStack nsStack = (ArrayStack) namespaces.get(prefix);
        if (nsStack == null) {
            return null;
        }
        try {
            return ((String) nsStack.peek());
        } catch (EmptyStackException e) {
            return null;
        }


    }

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        if (saxLog.isDebugEnabled()) {
            saxLog.debug("endPrefixMapping(" + prefix + ")");
        }


        // Deregister this prefix mapping
        ArrayStack stack = (ArrayStack) namespaces.get(prefix);
        if (stack == null) {
            return;
        }
        try {
            stack.pop();
            if (stack.empty())
                namespaces.remove(prefix);
        } catch (EmptyStackException e) {
            throw createSAXException("endPrefixMapping popped too many times");
        }

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        if (saxLog.isDebugEnabled()) {
            saxLog.debug("startPrefixMapping(" + prefix + "," + namespaceURI + ")");
        }


        // Register this prefix mapping
        ArrayStack stack = (ArrayStack) namespaces.get(prefix);
        if (stack == null) {
            stack = new ArrayStack();
            namespaces.put(prefix, stack);
        }
        stack.push(namespaceURI);


    }

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    public void push(String stackName, Object value) {
        if (stackAction != null) {
            value = stackAction.onPush(this, stackName, value);
        }


        ArrayStack namedStack = (ArrayStack) stacksByName.get(stackName);
        if (namedStack == null) {
            namedStack = new ArrayStack();
            stacksByName.put(stackName, namedStack);
        }
        namedStack.push(value);
    }

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     *
     * @since 1.6
     */
    public Object pop(String stackName) {
        Object result = null;
        ArrayStack namedStack = (ArrayStack) stacksByName.get(stackName);
        if (namedStack == null) {
            if (log.isDebugEnabled()) {
                log.debug("Stack '" + stackName + "' is empty");
            }
            throw new EmptyStackException();
        }
        
        result = namedStack.pop();
        
        if (stackAction != null) {
            result = stackAction.onPop(this, stackName, result);
        }

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