securityhelper.java

一些公用的Java函数

    {
        if( pattern.equals( "*" ) )
        {
            return true;
        }
        
        if( pattern.equals("?" ) )
        {
            return org != null && org.trim().length() > 0;
        }
        
        return org.matches( pattern );
    }
    
    public void addExceptionConfig( String exception, String page )
    {
        this.exceptions.put(exception, page);
    }

    public void addExceptionConfig( Element element )
    {
            String exception = element.getAttribute("name");
            String redirect = element.getAttribute("redirect");
            if( redirect == null || redirect.trim().length() == 0 )
            {
                NodeList nls = element.getElementsByTagName("redirect");
                if( nls != null && nls.getLength() > 0 )
                {
                    Element redirectElement = (Element) nls.item(0);
                    redirect = redirectElement.getAttribute("to");
                    if( redirect == null || redirect.trim().length() == 0 )
                    {
                        redirect = redirectElement.getTextContent();
                    }
                }
            }
            this.addExceptionConfig(exception, redirect);           
    }
    
    public void addAuthenticationConfig( Element element )
    {
        NodeList nl = element.getElementsByTagName( "provider" );
        if( nl.getLength() > 0 )
        {
            try
            {
                Element providerElement = ((Element) nl.item(0));
                String className= providerElement.getAttribute("class");
                securityProvider = (SecurityProvider) Class.forName( className ).newInstance();
                securityProvider.setProviderConfig( providerElement );
                //securityProvider.setPublicTokenKey(text);
            }
            catch (Exception ex)
            {
                logger.error("Thrown the Exception %s\n", ex);
                //logger.fatal(ex.getMessage(), ex);
                throw new RuntimeException( ex.getMessage(), ex );
            }
        }
    }
    
    public void init( Element element )
    {
        if( "page".equals(  element.getTagName() ) )
        {
            ///this is page;
            addPageSecurityConfig( element );
            return;
        }
        
        if( "exception".equals(element.getTagName() ) )
        {
            addExceptionConfig( element );
            return;
        }
        
        if( "authentication".equals(element.getTagName()))
        {
            addAuthenticationConfig( element );
            return;
        }
        
        if( "contentProvider".equals(element.getTagName() ) ) 
        {
            configContentProvider( element );
            return;
        }
    }
    
    public String getEditTemplate(String viewId, String contentPath)
    {
        Iterator<Map.Entry<String, String>> patterns = editContentTemplate.entrySet().iterator();
        while( patterns.hasNext() )
        {
            Map.Entry<String, String> entry = patterns.next();
            
            if( this.matchPattern(viewId, entry.getKey() ) )
            {
                
                String template = entry.getValue();
                if( template.startsWith( "~/" ) )
                {
                    template = template.substring(1); 
                }
                
                return template;
            }
        }
        
        return null;
        //return false;
    }
            
    
    public String getContentTemplate( String viewId, String contentPath )
    {
        Iterator<Map.Entry<String, String>> patterns = contentPattern.entrySet().iterator();
        while( patterns.hasNext() )
        {
            Map.Entry<String, String> entry = patterns.next();
            if( this.matchPattern(viewId, entry.getKey() ) )
            {
                
                String template = entry.getValue();
                if( template.startsWith( "~/" ) )
                {
                    template = template.substring(1); 
                }
                
                return template;
            }
        }
        
        return null;
        //return false;
    }
    
    public ContentFactory getContentProviderFactory()
    {
        return factory;
        //return ContentFactory.createFactory();
    }
    
    private void configContentProvider(Element element)
    {
        try
        {
            ///providerFactory
            String factoryClass = element.getAttribute("factory");
            String pattern = element.getAttribute("pattern");
            
            NodeList children = element.getChildNodes();
            for( int i  = 0; i < children.getLength(); i ++ )
            {
                Node nd = children.item(i);
                if( nd instanceof Element )
                {
                    Element elm = (Element) nd;
                    if( "factory".equals(elm.getTagName() ) )
                    {                        
                        factoryClass = elm.getTextContent();
                    }
                    else if( "template".equals(elm.getTagName() ) )
                    {
                        String viewPattern = elm.getAttribute("pattern");
                        
                        if( viewPattern == null || viewPattern.trim().length() == 0 )
                        {
                            viewPattern = pattern;
                        }
                        
                        if( viewPattern != null && viewPattern.trim().length() > 0 )
                        {
                            String template  = elm.getTextContent();
                            if( template != null && template.trim().length() > 0 )
                            {
                                this.contentPattern.put( viewPattern, template );
                            }
                            
                            String editTemplate = elm.getAttribute("editTemplate");
                            if( editTemplate != null && editTemplate.trim().length() > 0 )
                            {
                                editContentTemplate.put( viewPattern, editTemplate );
                            }
                            
                        }
                        
                    }
                }
            }
            
            if( factoryClass != null && factoryClass.trim().length() > 0 )
            {
                System.setProperty( ContentFactory.CONTENT_FACTORY, factoryClass);
                
            }
            
            ///we assume that was setup by Sytem.Property.
            factory = ContentFactory.createFactory();
            
        }
        catch (ContentException ex)
        {
            logger.warn("Thrown the Exception %s\n", ex);
            //Logger.getLogger(SecurityHelper.class.getName()).log(Level.SEVERE, null, ex);
        }
        ///pattern
        ///parameters
    }
    
    public void init(FilterConfig config) 
    {
        try
        {
            System.out.println(config.getInitParameter("nible.securityConfig"));
            InputStream configInputStream = config.getServletContext().getResourceAsStream(config.getInitParameter("nible.securityConfig"));
            DocumentBuilder builder = null;
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            builder = factory.newDocumentBuilder();
            Document doc = builder.parse(configInputStream);
            NodeList elms = doc.getElementsByTagName("security");
            if( elms != null && elms.getLength() == 1 )
            {
                ////successed parse file
                Element securityElement = (Element) elms.item(0);
                NodeList children = securityElement.getChildNodes();
                for( int i = 0; i < children.getLength(); i ++ )
                {
                    Node nd = children.item(i);
                    if( nd.getNodeType() == Node.ELEMENT_NODE )
                    {
                        init( (Element) nd );
                    }
                }
            }
        }
        catch (SAXException ex)
        {
            logger.info("Thrown the Exception %s\n", ex);
            //Logger.getLogger(SecurityHelper.class.getName()).log(Level.SEVERE, null, ex);
        }
        catch (IOException ex)
        {
            logger.info("Thrown the Exception %s\n", ex);
        }
        catch (ParserConfigurationException ex)
        {
            logger.info("Thrown the Exception %s\n", ex);
        }
    }
}