xmlparser.java

jetty SERVER連接資料庫用的軟體

            if (pid != null)
                entity = (URL) _redirectMap.get(pid);
            if (entity == null)
                entity = (URL) _redirectMap.get(sid);
            if (entity == null)
            {
                String dtd = sid;
                if (dtd.lastIndexOf('/') >= 0)
                    dtd = dtd.substring(dtd.lastIndexOf('/') + 1);

                if (Log.isDebugEnabled())
                    Log.debug("Can't exact match entity in redirect map, trying " + dtd);
                entity = (URL) _redirectMap.get(dtd);
            }

            if (entity != null)
            {
                try
                {
                    InputStream in = entity.openStream();
                    if (Log.isDebugEnabled())
                        Log.debug("Redirected entity " + sid + " --> " + entity);
                    InputSource is = new InputSource(in);
                    is.setSystemId(sid);
                    return is;
                }
                catch (IOException e)
                {
                    Log.ignore(e);
                }
            }
            return null;
        }
    }

    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    /**
     * XML Attribute.
     */
    public static class Attribute
    {
        private String _name;
        private String _value;

        Attribute(String n, String v)
        {
            _name = n;
            _value = v;
        }

        public String getName()
        {
            return _name;
        }

        public String getValue()
        {
            return _value;
        }
    }

    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    /**
     * XML Node. Represents an XML element with optional attributes and ordered content.
     */
    public static class Node extends AbstractList
    {
        Node _parent;
        private ArrayList _list;
        private String _tag;
        private Attribute[] _attrs;
        private boolean _lastString = false;
        private String _path;

        /* ------------------------------------------------------------ */
        Node(Node parent, String tag, Attributes attrs)
        {
            _parent = parent;
            _tag = tag;

            if (attrs != null)
            {
                _attrs = new Attribute[attrs.getLength()];
                for (int i = 0; i < attrs.getLength(); i++)
                {
                    String name = attrs.getLocalName(i);
                    if (name == null || name.equals(""))
                        name = attrs.getQName(i);
                    _attrs[i] = new Attribute(name, attrs.getValue(i));
                }
            }
        }

        /* ------------------------------------------------------------ */
        public Node getParent()
        {
            return _parent;
        }

        /* ------------------------------------------------------------ */
        public String getTag()
        {
            return _tag;
        }

        /* ------------------------------------------------------------ */
        public String getPath()
        {
            if (_path == null)
            {
                if (getParent() != null && getParent().getTag() != null)
                    _path = getParent().getPath() + "/" + _tag;
                else
                    _path = "/" + _tag;
            }
            return _path;
        }

        /* ------------------------------------------------------------ */
        /**
         * Get an array of element attributes.
         */
        public Attribute[] getAttributes()
        {
            return _attrs;
        }

        /* ------------------------------------------------------------ */
        /**
         * Get an element attribute.
         * 
         * @return attribute or null.
         */
        public String getAttribute(String name)
        {
            return getAttribute(name, null);
        }

        /* ------------------------------------------------------------ */
        /**
         * Get an element attribute.
         * 
         * @return attribute or null.
         */
        public String getAttribute(String name, String dft)
        {
            if (_attrs == null || name == null)
                return dft;
            for (int i = 0; i < _attrs.length; i++)
                if (name.equals(_attrs[i].getName()))
                    return _attrs[i].getValue();
            return dft;
        }

        /* ------------------------------------------------------------ */
        /**
         * Get the number of children nodes.
         */
        public int size()
        {
            if (_list != null)
                return _list.size();
            return 0;
        }

        /* ------------------------------------------------------------ */
        /**
         * Get the ith child node or content.
         * 
         * @return Node or String.
         */
        public Object get(int i)
        {
            if (_list != null)
                return _list.get(i);
            return null;
        }

        /* ------------------------------------------------------------ */
        /**
         * Get the first child node with the tag.
         * 
         * @param tag
         * @return Node or null.
         */
        public Node get(String tag)
        {
            if (_list != null)
            {
                for (int i = 0; i < _list.size(); i++)
                {
                    Object o = _list.get(i);
                    if (o instanceof Node)
                    {
                        Node n = (Node) o;
                        if (tag.equals(n._tag))
                            return n;
                    }
                }
            }
            return null;
        }

        /* ------------------------------------------------------------ */
        public void add(int i, Object o)
        {
            if (_list == null)
                _list = new ArrayList();
            if (o instanceof String)
            {
                if (_lastString)
                {
                    int last = _list.size() - 1;
                    _list.set(last, (String) _list.get(last) + o);
                }
                else
                    _list.add(i, o);
                _lastString = true;
            }
            else
            {
                _lastString = false;
                _list.add(i, o);
            }
        }

        /* ------------------------------------------------------------ */
        public void clear()
        {
            if (_list != null)
                _list.clear();
            _list = null;
        }

        /* ------------------------------------------------------------ */
        /**
         * Get a tag as a string.
         * 
         * @param tag The tag to get
         * @param tags IF true, tags are included in the value.
         * @param trim If true, trim the value.
         * @return results of get(tag).toString(tags).
         */
        public String getString(String tag, boolean tags, boolean trim)
        {
            Node node = get(tag);
            if (node == null)
                return null;
            String s = node.toString(tags);
            if (s != null && trim)
                s = s.trim();
            return s;
        }

        /* ------------------------------------------------------------ */
        public synchronized String toString()
        {
            return toString(true);
        }

        /* ------------------------------------------------------------ */
        /**
         * Convert to a string.
         * 
         * @param tag If false, only _content is shown.
         */
        public synchronized String toString(boolean tag)
        {
            StringBuffer buf = new StringBuffer();
            synchronized (buf)
            {
                toString(buf, tag);
                return buf.toString();
            }
        }

        /* ------------------------------------------------------------ */
        /**
         * Convert to a string.
         * 
         * @param tag If false, only _content is shown.
         */
        public synchronized String toString(boolean tag, boolean trim)
        {
            String s = toString(tag);
            if (s != null && trim)
                s = s.trim();
            return s;
        }

        /* ------------------------------------------------------------ */
        private synchronized void toString(StringBuffer buf, boolean tag)
        {
            if (tag)
            {
                buf.append("<");
                buf.append(_tag);

                if (_attrs != null)
                {
                    for (int i = 0; i < _attrs.length; i++)
                    {
                        buf.append(' ');
                        buf.append(_attrs[i].getName());
                        buf.append("=\"");
                        buf.append(_attrs[i].getValue());
                        buf.append("\"");
                    }
                }
            }

            if (_list != null)
            {
                if (tag)
                    buf.append(">");
                for (int i = 0; i < _list.size(); i++)
                {
                    Object o = _list.get(i);
                    if (o == null)
                        continue;
                    if (o instanceof Node)
                        ((Node) o).toString(buf, tag);
                    else
                        buf.append(o.toString());
                }
                if (tag)
                {
                    buf.append("</");
                    buf.append(_tag);
                    buf.append(">");
                }
            }
            else if (tag)
                buf.append("/>");
        }

        /* ------------------------------------------------------------ */
        /**
         * Iterator over named child nodes.
         * 
         * @param tag The tag of the nodes.
         * @return Iterator over all child nodes with the specified tag.
         */
        public Iterator iterator(final String tag)
        {
            return new Iterator()
            {
                int c = 0;
                Node _node;

                /* -------------------------------------------------- */
                public boolean hasNext()
                {
                    if (_node != null)
                        return true;
                    while (_list != null && c < _list.size())
                    {
                        Object o = _list.get(c);
                        if (o instanceof Node)
                        {
                            Node n = (Node) o;
                            if (tag.equals(n._tag))
                            {
                                _node = n;
                                return true;
                            }
                        }
                        c++;
                    }
                    return false;
                }

                /* -------------------------------------------------- */
                public Object next()
                {
                    try
                    {
                        if (hasNext())
                            return _node;
                        throw new NoSuchElementException();
                    }
                    finally
                    {
                        _node = null;
                        c++;
                    }
                }

                /* -------------------------------------------------- */
                public void remove()
                {
                    throw new UnsupportedOperationException("Not supported");
                }
            };
        }
    }
}