Examples of org.apache.commons.digester.Digester

org.apache.commons.digester.Digester

A Digester processes an XML input stream by matching a series of element nesting patterns to execute Rules that have been added prior to the start of parsing. This package was inspired by the XmlMapper class that was part of Tomcat 3.0 and 3.1, but is organized somewhat differently.

See the Digester Developer Guide for more information.

IMPLEMENTATION NOTE - A single Digester instance may only be used within the context of a single thread at a time, and a call to parse() must be completed before another can be initiated even from the same thread.

IMPLEMENTATION NOTE - A bug in Xerces 2.0.2 prevents the support of XML schema. You need Xerces 2.1/2.3 and up to make this class working with XML schema

   * @throws ParseException 
   */
  private static Channel fetchChannelViaHTTP(String url) 
    throws HttpException, IOException, SAXException
  {
    Digester parser = new XMLDigester();
    GetMethod get = new GetMethod(url);
    //get.setRequestHeader("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; zh-cn) Opera 8.52");
        try {
          http_client.executeMethod(get);
          if(get.getStatusCode()==HttpServletResponse.SC_OK){
            Charset cs = null;
            Header header_cs = getResponseHeader(get,"Content-Type");
            if(header_cs==null){
              cs = Charset.forName(get.getResponseCharSet());
            }
            else{
              String content_type = header_cs.getValue().toLowerCase();
              try {
            Object[] values = content_type_parser.parse(content_type);
            cs = Charset.forName((String)values[1]);
          } catch (ParseException e) {
            URL o_url = new URL(url);
            String host = o_url.getHost();
            Iterator hosts = charsets.keySet().iterator();
            while(hosts.hasNext()){
              String t_host = (String)hosts.next();
              if(host.toLowerCase().endsWith(t_host)){
                cs = Charset.forName((String)charsets.get(t_host));
                break;
              }
            }
            if(cs==null)
              cs = default_charset;
            
          }
            }            
            
            BufferedReader rd = new BufferedReader(new InputStreamReader(
            get.getResponseBodyAsStream(), cs));
            
            char[] cbuf = new char[1];
            int read_idx = 1;
            do{
              rd.mark(read_idx++);
              if(rd.read(cbuf)==-1)
                break;
              if(cbuf[0]!='<')
                continue;
              rd.reset();
              break;
            }while(true);
            return (Channel)parser.parse(rd);
          }
          else{
            log.error("Fetch RSS from " + url + " failed, code="+get.getStatusCode());
          }
        }finally{

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     * @see net.sf.jportlet.portlet.descriptor.ApplicationDescriptorLoader#load(java.io.InputStream)
     */
    public ApplicationDescriptor load( InputStream in )
        throws PortletException
    {
        Digester digester = new Digester(  );


        /* portlet-app */
        digester.addObjectCreate( "portlet-app", ApplicationDescriptor.class );
        digester.addBeanPropertySetter( "portlet-app/portlet-app-name", "name" );


        /* portlet-app/context-param */
        digester.addCallMethod( "portlet-app/context-param", "addContextParameter", 2 );
        digester.addCallParam( "portlet-app/context-param/param-name", 0 );
        digester.addCallParam( "portlet-app/context-param/param-value", 1 );


        /* portlet-app/portlet */
        digester.addObjectCreate( "portlet-app/portlet", PortletDescriptor.class );
        digester.addBeanPropertySetter( "portlet-app/portlet/portlet-name", "name" );
        digester.addBeanPropertySetter( "portlet-app/portlet/portlet-class", "portletClass" );
        digester.addBeanPropertySetter( "portlet-app/portlet/default-locale", "defaultLocale" );
        digester.addBeanPropertySetter( "portlet-app/portlet/action-listener", "actionListenerClass" );
        digester.addBeanPropertySetter( "portlet-app/portlet/message-listener", "messageListenerClass" );


        /* portlet-app/portlet/cache */
        digester.addObjectCreate( "portlet-app/portlet/cache", CacheDescriptor.class );
        digester.addSetProperties( "portlet-app/portlet/cache", "mode", "mode" );
        digester.addBeanPropertySetter( "portlet-app/portlet/cache/expires", "expires" );
        digester.addBeanPropertySetter( "portlet-app/portlet/cache/shared", "shared" );
        digester.addSetNext( "portlet-app/portlet/cache", "addCacheDescriptor" );


        /* portlet-app/portlet/language */
        digester.addObjectCreate( "portlet-app/portlet/language", LanguageDescriptor.class );
        digester.addSetProperties( "portlet-app/portlet/language", "locale", "locale" );
        digester.addBeanPropertySetter( "portlet-app/portlet/language/title", "title" );
        digester.addBeanPropertySetter( "portlet-app/portlet/language/title-short", "titleShort" );
        digester.addBeanPropertySetter( "portlet-app/portlet/language/description", "description" );
        digester.addBeanPropertySetter( "portlet-app/portlet/language/keywords", "keywords" );
        digester.addSetNext( "portlet-app/portlet/language", "addLanguageDescriptor" );


        /* portlet-app/portlet/supports/markup */
        digester.addObjectCreate( "portlet-app/portlet/supports/markup", MarkupDescriptor.class );
        digester.addSetProperties( "portlet-app/portlet/supports/markup", "name", "markup" );
        digester.addCallMethod( "portlet-app/portlet/supports/markup/view", "supportView" );
        digester.addCallMethod( "portlet-app/portlet/supports/markup/edit", "supportEdit" );
        digester.addCallMethod( "portlet-app/portlet/supports/markup/configure", "supportConfigure" );
        digester.addCallMethod( "portlet-app/portlet/supports/markup/help", "supportHelp" );
        digester.addSetNext( "portlet-app/portlet/supports/markup", "addMarkupDescriptor" );


        /* portlet-app/portlet/init-param */
        digester.addCallMethod( "portlet-app/portlet/init-param", "addInitParameter", 2 );
        digester.addCallParam( "portlet-app/portlet/init-param/param-name", 0 );
        digester.addCallParam( "portlet-app/portlet/init-param/param-value", 1 );


        /* portlet-app/portlet/security-contraint/auth-contraint */
        digester.addObjectCreate( "portlet-app/portlet/security-constraint/auth-constraint", AuthConstraintDescriptor.class );
        digester.addSetProperties( "portlet-app/portlet/security-constraint/auth-constraint", "mode", "mode" );
        digester.addBeanPropertySetter( "portlet-app/portlet/security-constraint/auth-constraint/allow-anonymous", "allowAnonymous" );
        digester.addCallMethod( "portlet-app/portlet/security-constraint/auth-constraint/role-name", "addRole", 1 );
        digester.addCallParam( "portlet-app/portlet/security-constraint/auth-constraint/role-name", 0 );
        digester.addSetNext( "portlet-app/portlet/security-constraint/auth-constraint", "addAuthConstraintDescriptor" );


        /* portlet-app/portlet/webflow/action */
        digester.addObjectCreate( "portlet-app/portlet/webflow/action", WebflowActionDescriptor.class );
        digester.addSetProperties( "portlet-app/portlet/webflow/action", "name", "name" );
        
        digester.addCallMethod( "portlet-app/portlet/webflow/action/return", "addReturnUri", 2 );
        digester.addCallParam( "portlet-app/portlet/webflow/action/return", 0, "code" );
        digester.addCallParam( "portlet-app/portlet/webflow/action/return", 1 );
        
        digester.addSetNext( "portlet-app/portlet/webflow/action", "addWebflowActionDescriptor" );


        digester.addSetNext( "portlet-app/portlet", "addPortletDescriptor" );


        try
        {
            digester.setValidating( true );
            return ( ApplicationDescriptor ) digester.parse( in );
        }
        catch ( Exception e )
        {
            __log.error( "Unexpected error", e );

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     * @param input
     * @throws ServletException
     */
    private void parseMappings(InputStream input) throws ServletException {
      // Prepare a Digester to scan the web application deployment descriptor
      Digester digester = new Digester();
      digester.setNamespaceAware(true);
      digester.setValidating(false);


      // Configure the processing rules that we need
      digester.addCallMethod("web-app/servlet-mapping", "add", 2);
      digester.addCallParam("web-app/servlet-mapping/servlet-name", 0);
      digester.addCallParam("web-app/servlet-mapping/url-pattern", 1);


      digester.push(this);
      try {
        digester.parse(input);
      } catch (Exception e) {
        throw new ServletException("Could not parse /WEB-INF/web.xml", e);
      }
    }

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        return tests;
    }


    static HttpTestContainer generateTests(String path) throws IOException {
        try {
            Digester digester = new Digester();
            digester.setValidating(false);


            digester.addObjectCreate(MATCH_TESTS, HttpTestContainer.class);
            digester.addSetProperties(MATCH_TESTS, "rootUrl", "rootUrl");
            digester.addSetProperties(MATCH_TESTS, "port", "port");
            digester.addSetProperties(MATCH_TESTS, "defaultUsername", "defaultUsername");
            digester.addSetProperties(MATCH_TESTS, "defaultPassword", "defaultPassword");


            digester.addObjectCreate(MATCH_TEST, HttpTestEntry.class);
            digester.addSetProperties(MATCH_TEST, "name", "name");
            digester.addSetProperties(MATCH_TEST, "authenticated", "authenticated");
            digester.addSetProperties(MATCH_TEST, "username", "username");
            digester.addSetProperties(MATCH_TEST, "password", "password");


            digester.addObjectCreate(MATCH_TEST_STEP, HttpTestEntryStep.class);
            digester.addSetProperties(MATCH_TEST_STEP, "name", "name");
            digester.addSetProperties(MATCH_TEST_STEP, "method", "method");
            digester.addSetProperties(MATCH_TEST_STEP, "url", "url");
            digester.addSetProperties(MATCH_TEST_STEP, "expectedCode", "expectedCode");
            digester.addSetProperties(MATCH_TEST_STEP, "redirectUrl", "redirectUrl");


            digester.addObjectCreate(MATCH_PARAMETER, HttpTestEntryStep.Parameter.class);
            digester.addSetProperties(MATCH_PARAMETER, "key", "key");
            digester.addSetProperties(MATCH_PARAMETER, "value", "value");
            digester.addSetNext(MATCH_PARAMETER, "addParameter");


            digester.addObjectCreate(MATCH_MESSAGE, HttpTestEntryStep.Value.class);
            digester.addSetProperties(MATCH_MESSAGE, "value", "value");
            digester.addSetNext(MATCH_MESSAGE, "addMessage");


            digester.addObjectCreate(MATCH_ERROR, HttpTestEntryStep.Value.class);
            digester.addSetProperties(MATCH_ERROR, "value", "value");
            digester.addSetNext(MATCH_ERROR, "addError");


            digester.addSetNext(MATCH_TEST_STEP, "addStep");
            digester.addSetNext(MATCH_TEST, "addEntry");


            InputStream input = new FileInputStream(path);
            return (HttpTestContainer) digester.parse(input);
        } catch (SAXException e) {
            throw new IOException(e.getMessage());
        }
    }

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      } catch (Exception e) {
        log.info("Parser doesn't support XML Schema validation, using DTD...");
        log.debug(e);
      }
    }
    final Digester digester = new Digester(parser);
    digester.setLogger(getLog());
    digester.setClassLoader(context.getClassLoader());
    digester.setErrorHandler(new DefaultHandler() {
      public void error(SAXParseException e) throws SAXException {
        throw e;
      }
      public void warning(SAXParseException e) throws SAXException {
        getLog().warn(e.getMessage());
      }
    });
    digester.setEntityResolver(new EntityResolver() {
      public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
        InputSource result = null;
        if (schemaResolver != null) {
          result = schemaResolver.resolveEntity(publicId, systemId);
        }
        if (result == null && dtdResolver != null) {
          result = dtdResolver.resolveEntity(publicId, systemId);
        }
        if (result != null) {
          return result;
        }
        return digester.resolveEntity(publicId, systemId);
      }
    });


    addBaseRuleInstances(digester);
    addRuleInstances(digester);

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  protected Log getLog() {
    return log;
  }


  private RootConfigImpl parse(URL url) throws ConfigException {
    Digester digester = createDigester();    
    RootConfigImpl root = createRoot();
    digester.push(root);
    log.debug("Parsing: " + url);
    try {
      InputSource input = new InputSource(url.openStream());
      input.setSystemId(url.toString());
      digester.parse(input);
    } catch (Exception e) {
      throw new ConfigException("Error parsing " + url, e);
    }


    // Parse imported files

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  {
  if( digester != null )
    return;


    // initialize the digester
  digester = new Digester();
  digester.setUseContextClassLoader(useContextClassLoader);


  //digester.setSchema( registeredUri[1] );
    // Register local schema and DTD
  for(int i=0;i<registeredUri.length; i+=2 )

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  {
    if( this.digester != null )
      return;


    // initialize the digester
  Digester digester = new Digester();
  digester.setUseContextClassLoader(true);


  //digester.setSchema( registeredUri[1] );
  // Register local uri
  registerLocalUri( digester, registeredUri);


    // set validation
  log.info("Set rule validation to '" + validateParsing  + "'" );
  digester.setValidating(validateParsing);


  addDigesterRuleSet(digester);


  this.digester = digester;
  }

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    public void setServletConfigFile(String pathname) {
        confirmSetup();


        // pull in the appropriate parts of the
        // web.xml file -- first the init-parameters
        Digester digester = new Digester();
        digester.push(this.config);
        digester.setValidating(false);
        digester.addCallMethod("web-app/servlet/init-param", //$NON-NLS-1$
                "setInitParameter", 2); //$NON-NLS-1$
        digester.addCallParam("web-app/servlet/init-param/param-name", 0); //$NON-NLS-1$
        digester.addCallParam("web-app/servlet/init-param/param-value", 1); //$NON-NLS-1$
        try {
            InputStream input = this.context.getResourceAsStream(pathname);
            if (input == null)
                throw new AssertionFailedError("Invalid pathname: " + pathname); //$NON-NLS-1$
            digester.parse(input);
            input.close();
        } catch (Exception e) {
            throw new AssertionFailedError(
                    "Received an exception while loading web.xml - " //$NON-NLS-1$
                            + e.getClass() + " : " + e.getMessage()); //$NON-NLS-1$
        }


        // now the context parameters..
        digester = new Digester();
        digester.setValidating(false);
        digester.push(this.context);
        digester.addCallMethod("web-app/context-param", "setInitParameter", 2); //$NON-NLS-1$ //$NON-NLS-2$
        digester.addCallParam("web-app/context-param/param-name", 0); //$NON-NLS-1$
        digester.addCallParam("web-app/context-param/param-value", 1); //$NON-NLS-1$
        try {
            InputStream input = this.context.getResourceAsStream(pathname);
            if (input == null)
                throw new AssertionFailedError("Invalid pathname: " + pathname); //$NON-NLS-1$
            digester.parse(input);
            input.close();
        } catch (Exception e) {
            throw new AssertionFailedError(
                    "Received an exception while loading web.xml - " //$NON-NLS-1$
                            + e.getClass() + " : " + e.getMessage()); //$NON-NLS-1$

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      * Constructor.
      * Creates a digester parser and initializes syntax rules.
      */
  public XmlParser()
  {
  digester = new Digester();
  digester.setValidating(validating);
  digester.setNamespaceAware(true);
  digester.setUseContextClassLoader(true);
  // Register our local copy of the DTDs that we can find
  for (int i = 0; i < registrations.length; i += 2) {

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