validator.java

业界著名的tomcat服务器的最新6.0的源代码。

            Node.Nodes subElems = n.getBody();
            if (subElems == null) {
                err.jspError(n, "jsp.error.params.emptyBody");
            }
            visitBody(n);
        }

        public void visit(Node.IncludeAction n) throws JasperException {
            JspUtil.checkAttributes("Include action", n, includeActionAttrs,
                    err);
            n.setPage(getJspAttribute(null, "page", null, null, n
                    .getAttributeValue("page"), java.lang.String.class, n,
                    false));
            visitBody(n);
        };

        public void visit(Node.ForwardAction n) throws JasperException {
            JspUtil.checkAttributes("Forward", n, forwardActionAttrs, err);
            n.setPage(getJspAttribute(null, "page", null, null, n
                    .getAttributeValue("page"), java.lang.String.class, n,
                    false));
            visitBody(n);
        }

        public void visit(Node.GetProperty n) throws JasperException {
            JspUtil.checkAttributes("GetProperty", n, getPropertyAttrs, err);
        }

        public void visit(Node.SetProperty n) throws JasperException {
            JspUtil.checkAttributes("SetProperty", n, setPropertyAttrs, err);
            String property = n.getTextAttribute("property");
            String param = n.getTextAttribute("param");
            String value = n.getAttributeValue("value");

            n.setValue(getJspAttribute(null, "value", null, null, value,
                    java.lang.Object.class, n, false));

            boolean valueSpecified = n.getValue() != null;

            if ("*".equals(property)) {
                if (param != null || valueSpecified)
                    err.jspError(n, "jsp.error.setProperty.invalid");

            } else if (param != null && valueSpecified) {
                err.jspError(n, "jsp.error.setProperty.invalid");
            }

            visitBody(n);
        }

        public void visit(Node.UseBean n) throws JasperException {
            JspUtil.checkAttributes("UseBean", n, useBeanAttrs, err);

            String name = n.getTextAttribute("id");
            String scope = n.getTextAttribute("scope");
            JspUtil.checkScope(scope, n, err);
            String className = n.getTextAttribute("class");
            String type = n.getTextAttribute("type");
            BeanRepository beanInfo = pageInfo.getBeanRepository();

            if (className == null && type == null)
                err.jspError(n, "jsp.error.usebean.missingType");

            if (beanInfo.checkVariable(name))
                err.jspError(n, "jsp.error.usebean.duplicate");

            if ("session".equals(scope) && !pageInfo.isSession())
                err.jspError(n, "jsp.error.usebean.noSession");

            Node.JspAttribute jattr = getJspAttribute(null, "beanName", null,
                    null, n.getAttributeValue("beanName"),
                    java.lang.String.class, n, false);
            n.setBeanName(jattr);
            if (className != null && jattr != null)
                err.jspError(n, "jsp.error.usebean.notBoth");

            if (className == null)
                className = type;

            beanInfo.addBean(n, name, className, scope);

            visitBody(n);
        }

        public void visit(Node.PlugIn n) throws JasperException {
            JspUtil.checkAttributes("Plugin", n, plugInAttrs, err);

            throwErrorIfExpression(n, "type", "jsp:plugin");
            throwErrorIfExpression(n, "code", "jsp:plugin");
            throwErrorIfExpression(n, "codebase", "jsp:plugin");
            throwErrorIfExpression(n, "align", "jsp:plugin");
            throwErrorIfExpression(n, "archive", "jsp:plugin");
            throwErrorIfExpression(n, "hspace", "jsp:plugin");
            throwErrorIfExpression(n, "jreversion", "jsp:plugin");
            throwErrorIfExpression(n, "name", "jsp:plugin");
            throwErrorIfExpression(n, "vspace", "jsp:plugin");
            throwErrorIfExpression(n, "nspluginurl", "jsp:plugin");
            throwErrorIfExpression(n, "iepluginurl", "jsp:plugin");

            String type = n.getTextAttribute("type");
            if (type == null)
                err.jspError(n, "jsp.error.plugin.notype");
            if (!type.equals("bean") && !type.equals("applet"))
                err.jspError(n, "jsp.error.plugin.badtype");
            if (n.getTextAttribute("code") == null)
                err.jspError(n, "jsp.error.plugin.nocode");

            Node.JspAttribute width = getJspAttribute(null, "width", null,
                    null, n.getAttributeValue("width"), java.lang.String.class,
                    n, false);
            n.setWidth(width);

            Node.JspAttribute height = getJspAttribute(null, "height", null,
                    null, n.getAttributeValue("height"),
                    java.lang.String.class, n, false);
            n.setHeight(height);

            visitBody(n);
        }

        public void visit(Node.NamedAttribute n) throws JasperException {
            JspUtil.checkAttributes("Attribute", n, attributeAttrs, err);
            visitBody(n);
        }

        public void visit(Node.JspBody n) throws JasperException {
            visitBody(n);
        }

        public void visit(Node.Declaration n) throws JasperException {
            if (pageInfo.isScriptingInvalid()) {
                err.jspError(n.getStart(), "jsp.error.no.scriptlets");
            }
        }

        public void visit(Node.Expression n) throws JasperException {
            if (pageInfo.isScriptingInvalid()) {
                err.jspError(n.getStart(), "jsp.error.no.scriptlets");
            }
        }

        public void visit(Node.Scriptlet n) throws JasperException {
            if (pageInfo.isScriptingInvalid()) {
                err.jspError(n.getStart(), "jsp.error.no.scriptlets");
            }
        }

        public void visit(Node.ELExpression n) throws JasperException {
            // exit if we are ignoring EL all together
            if (pageInfo.isELIgnored())
                return;

            // JSP.2.2 - '#{' not allowed in template text
            if (n.getType() == '#') {
                if (!pageInfo.isDeferredSyntaxAllowedAsLiteral()
                        && (tagInfo == null 
                                || ((tagInfo != null) && !(tagInfo.getTagLibrary().getRequiredVersion().equals("2.0")
                                        || tagInfo.getTagLibrary().getRequiredVersion().equals("1.2"))))) {
                    err.jspError(n, "jsp.error.el.template.deferred");
                } else {
                    return;
                }
            }

            // build expression
            StringBuffer expr = this.getBuffer();
            expr.append(n.getType()).append('{').append(n.getText())
                    .append('}');
            ELNode.Nodes el = ELParser.parse(expr.toString());

            // validate/prepare expression
            prepareExpression(el, n, expr.toString());

            // store it
            n.setEL(el);
        }

        public void visit(Node.UninterpretedTag n) throws JasperException {
            if (n.getNamedAttributeNodes().size() != 0) {
                err.jspError(n, "jsp.error.namedAttribute.invalidUse");
            }

            Attributes attrs = n.getAttributes();
            if (attrs != null) {
                int attrSize = attrs.getLength();
                Node.JspAttribute[] jspAttrs = new Node.JspAttribute[attrSize];
                for (int i = 0; i < attrSize; i++) {
                    jspAttrs[i] = getJspAttribute(null, attrs.getQName(i),
                            attrs.getURI(i), attrs.getLocalName(i), attrs
                                    .getValue(i), java.lang.Object.class, n,
                            false);
                }
                n.setJspAttributes(jspAttrs);
            }

            visitBody(n);
        }

        public void visit(Node.CustomTag n) throws JasperException {

            TagInfo tagInfo = n.getTagInfo();
            if (tagInfo == null) {
                err.jspError(n, "jsp.error.missing.tagInfo", n.getQName());
            }

            /*
             * The bodyconet of a SimpleTag cannot be JSP.
             */
            if (n.implementsSimpleTag()
                    && tagInfo.getBodyContent().equalsIgnoreCase(
                            TagInfo.BODY_CONTENT_JSP)) {
                err.jspError(n, "jsp.error.simpletag.badbodycontent", tagInfo
                        .getTagClassName());
            }

            /*
             * If the tag handler declares in the TLD that it supports dynamic
             * attributes, it also must implement the DynamicAttributes
             * interface.
             */
            if (tagInfo.hasDynamicAttributes()
                    && !n.implementsDynamicAttributes()) {
                err.jspError(n, "jsp.error.dynamic.attributes.not.implemented",
                        n.getQName());
            }

            /*
             * Make sure all required attributes are present, either as
             * attributes or named attributes (<jsp:attribute>). Also make sure
             * that the same attribute is not specified in both attributes or
             * named attributes.
             */
            TagAttributeInfo[] tldAttrs = tagInfo.getAttributes();
            String customActionUri = n.getURI();
            Attributes attrs = n.getAttributes();
            int attrsSize = (attrs == null) ? 0 : attrs.getLength();
            for (int i = 0; i < tldAttrs.length; i++) {
                String attr = null;
                if (attrs != null) {
                    attr = attrs.getValue(tldAttrs[i].getName());
                    if (attr == null) {
                        attr = attrs.getValue(customActionUri, tldAttrs[i]
                                .getName());
                    }
                }
                Node.NamedAttribute na = n.getNamedAttributeNode(tldAttrs[i]
                        .getName());

                if (tldAttrs[i].isRequired() && attr == null && na == null) {
                    err.jspError(n, "jsp.error.missing_attribute", tldAttrs[i]
                            .getName(), n.getLocalName());
                }
                if (attr != null && na != null) {
                    err.jspError(n, "jsp.error.duplicate.name.jspattribute",
                            tldAttrs[i].getName());
                }
            }

            Node.Nodes naNodes = n.getNamedAttributeNodes();
            int jspAttrsSize = naNodes.size() + attrsSize;
            Node.JspAttribute[] jspAttrs = null;
            if (jspAttrsSize > 0) {
                jspAttrs = new Node.JspAttribute[jspAttrsSize];
            }
            Hashtable<String, Object> tagDataAttrs = new Hashtable<String, Object>(attrsSize);

            checkXmlAttributes(n, jspAttrs, tagDataAttrs);
            checkNamedAttributes(n, jspAttrs, attrsSize, tagDataAttrs);

            TagData tagData = new TagData(tagDataAttrs);

            // JSP.C1: It is a (translation time) error for an action that
            // has one or more variable subelements to have a TagExtraInfo
            // class that returns a non-null object.
            TagExtraInfo tei = tagInfo.getTagExtraInfo();
            if (tei != null && tei.getVariableInfo(tagData) != null