jspdocumentparser.java

业界著名的tomcat服务器的最新6.0的源代码。

    /*
     * See org.xml.sax.ext.LexicalHandler.
     */
    public void startDTD(String name, String publicId, String systemId)
        throws SAXException {
        if (!isValidating) {
            fatalError(ENABLE_DTD_VALIDATION_EXCEPTION);
        }

        inDTD = true;
    }

    /*
     * See org.xml.sax.ext.LexicalHandler.
     */
    public void endDTD() throws SAXException {
        inDTD = false;
    }

    /*
     * Receives notification of a non-recoverable error.
     */
    public void fatalError(SAXParseException e) throws SAXException {
        throw e;
    }

    /*
     * Receives notification of a recoverable error.
     */
    public void error(SAXParseException e) throws SAXException {
        throw e;
    }

    /*
     * Receives notification of the start of a Namespace mapping. 
     */
    public void startPrefixMapping(String prefix, String uri)
        throws SAXException {
        TagLibraryInfo taglibInfo;

        if (directivesOnly && !(JSP_URI.equals(uri))) {
            return;
        }
        
        try {
            taglibInfo = getTaglibInfo(prefix, uri);
        } catch (JasperException je) {
            throw new SAXParseException(
                Localizer.getMessage("jsp.error.could.not.add.taglibraries"),
                locator,
                je);
        }

        if (taglibInfo != null) {
            if (pageInfo.getTaglib(uri) == null) {
                pageInfo.addTaglib(uri, taglibInfo);
            }
            pageInfo.pushPrefixMapping(prefix, uri);
        } else {
            pageInfo.pushPrefixMapping(prefix, null);
        }
    }

    /*
     * Receives notification of the end of a Namespace mapping. 
     */
    public void endPrefixMapping(String prefix) throws SAXException {

        if (directivesOnly) {
            String uri = pageInfo.getURI(prefix);
            if (!JSP_URI.equals(uri)) {
                return;
            }
        }

        pageInfo.popPrefixMapping(prefix);
    }

    //*********************************************************************
    // Private utility methods

    private Node parseStandardAction(
        String qName,
        String localName,
        Attributes nonTaglibAttrs,
        Attributes nonTaglibXmlnsAttrs,
        Attributes taglibAttrs,
        Mark start,
        Node parent)
        throws SAXException {

        Node node = null;

        if (localName.equals(ROOT_ACTION)) {
            if (!(current instanceof Node.Root)) {
                throw new SAXParseException(
                    Localizer.getMessage("jsp.error.nested_jsproot"),
                    locator);
            }
            node =
                new Node.JspRoot(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
            if (isTop) {
                pageInfo.setHasJspRoot(true);
            }
        } else if (localName.equals(PAGE_DIRECTIVE_ACTION)) {
            if (isTagFile) {
                throw new SAXParseException(
                    Localizer.getMessage(
                        "jsp.error.action.istagfile",
                        localName),
                    locator);
            }
            node =
                new Node.PageDirective(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
            String imports = nonTaglibAttrs.getValue("import");
            // There can only be one 'import' attribute per page directive
            if (imports != null) {
                ((Node.PageDirective)node).addImport(imports);
            }
        } else if (localName.equals(INCLUDE_DIRECTIVE_ACTION)) {
            node =
                new Node.IncludeDirective(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
            processIncludeDirective(nonTaglibAttrs.getValue("file"), node);
        } else if (localName.equals(DECLARATION_ACTION)) {
            if (scriptlessBodyNode != null) {
                // We're nested inside a node whose body is
                // declared to be scriptless
                throw new SAXParseException(
                    Localizer.getMessage(
                        "jsp.error.no.scriptlets",
                        localName),
                    locator);
            }
            node =
                new Node.Declaration(
                    qName,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(SCRIPTLET_ACTION)) {
            if (scriptlessBodyNode != null) {
                // We're nested inside a node whose body is
                // declared to be scriptless
                throw new SAXParseException(
                    Localizer.getMessage(
                        "jsp.error.no.scriptlets",
                        localName),
                    locator);
            }
            node =
                new Node.Scriptlet(
                    qName,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(EXPRESSION_ACTION)) {
            if (scriptlessBodyNode != null) {
                // We're nested inside a node whose body is
                // declared to be scriptless
                throw new SAXParseException(
                    Localizer.getMessage(
                        "jsp.error.no.scriptlets",
                        localName),
                    locator);
            }
            node =
                new Node.Expression(
                    qName,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(USE_BEAN_ACTION)) {
            node =
                new Node.UseBean(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(SET_PROPERTY_ACTION)) {
            node =
                new Node.SetProperty(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(GET_PROPERTY_ACTION)) {
            node =
                new Node.GetProperty(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(INCLUDE_ACTION)) {
            node =
                new Node.IncludeAction(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(FORWARD_ACTION)) {
            node =
                new Node.ForwardAction(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(PARAM_ACTION)) {
            node =
                new Node.ParamAction(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(PARAMS_ACTION)) {
            node =
                new Node.ParamsAction(
                    qName,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(PLUGIN_ACTION)) {
            node =
                new Node.PlugIn(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(TEXT_ACTION)) {
            node =
                new Node.JspText(
                    qName,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(BODY_ACTION)) {
            node =
                new Node.JspBody(
                    qName,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(ATTRIBUTE_ACTION)) {
            node =
                new Node.NamedAttribute(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(OUTPUT_ACTION)) {
            node =
                new Node.JspOutput(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(TAG_DIRECTIVE_ACTION)) {
            if (!isTagFile) {
                throw new SAXParseException(
                    Localizer.getMessage(
                        "jsp.error.action.isnottagfile",
                        localName),
                    locator);
            }
            node =
                new Node.TagDirective(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
            String imports = nonTaglibAttrs.getValue("import");
            // There can only be one 'import' attribute per tag directive
            if (imports != null) {
                ((Node.TagDirective)node).addImport(imports);
            }
        } else if (localName.equals(ATTRIBUTE_DIRECTIVE_ACTION)) {
            if (!isTagFile) {
                throw new SAXParseException(
                    Localizer.getMessage(
                        "jsp.error.action.isnottagfile",
                        localName),
                    locator);
            }
            node =
                new Node.AttributeDirective(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(VARIABLE_DIRECTIVE_ACTION)) {
            if (!isTagFile) {
                throw new SAXParseException(
                    Localizer.getMessage(
                        "jsp.error.action.isnottagfile",
                        localName),
                    locator);
            }
            node =
                new Node.VariableDirective(
                    qName,
                    nonTaglibAttrs,
                    nonTaglibXmlnsAttrs,
                    taglibAttrs,
                    start,
                    current);
        } else if (localName.equals(INVOKE_ACTION)) {
            if (!isTagFile) {
                throw new SAXParseException(
                    Localizer.getMessage(
                        "jsp.error.action.isnottagfile",
                        localName),
                    locator);
            }
            node =
                new Node.InvokeAction(
                    qName,