Tomcat example source code file (Validator.java)
The Tomcat Validator.java source code/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jasper.compiler;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import javax.el.ELException;
import javax.el.ExpressionFactory;
import javax.el.FunctionMapper;
import javax.servlet.jsp.tagext.FunctionInfo;
import javax.servlet.jsp.tagext.JspFragment;
import javax.servlet.jsp.tagext.PageData;
import javax.servlet.jsp.tagext.TagAttributeInfo;
import javax.servlet.jsp.tagext.TagData;
import javax.servlet.jsp.tagext.TagExtraInfo;
import javax.servlet.jsp.tagext.TagInfo;
import javax.servlet.jsp.tagext.TagLibraryInfo;
import javax.servlet.jsp.tagext.ValidationMessage;
import org.apache.el.lang.ELSupport;
import org.apache.jasper.Constants;
import org.apache.jasper.JasperException;
import org.apache.jasper.el.ELContextImpl;
import org.xml.sax.Attributes;
/**
* Performs validation on the page elements. Attributes are checked for
* mandatory presence, entry value validity, and consistency. As a side effect,
* some page global value (such as those from page direcitves) are stored, for
* later use.
*
* @author Kin-man Chung
* @author Jan Luehe
* @author Shawn Bayern
* @author Mark Roth
*/
class Validator {
/**
* A visitor to validate and extract page directive info
*/
static class DirectiveVisitor extends Node.Visitor {
private PageInfo pageInfo;
private ErrorDispatcher err;
private static final JspUtil.ValidAttribute[] pageDirectiveAttrs = {
new JspUtil.ValidAttribute("language"),
new JspUtil.ValidAttribute("extends"),
new JspUtil.ValidAttribute("import"),
new JspUtil.ValidAttribute("session"),
new JspUtil.ValidAttribute("buffer"),
new JspUtil.ValidAttribute("autoFlush"),
new JspUtil.ValidAttribute("isThreadSafe"),
new JspUtil.ValidAttribute("info"),
new JspUtil.ValidAttribute("errorPage"),
new JspUtil.ValidAttribute("isErrorPage"),
new JspUtil.ValidAttribute("contentType"),
new JspUtil.ValidAttribute("pageEncoding"),
new JspUtil.ValidAttribute("isELIgnored"),
new JspUtil.ValidAttribute("deferredSyntaxAllowedAsLiteral"),
new JspUtil.ValidAttribute("trimDirectiveWhitespaces")
};
private boolean pageEncodingSeen = false;
/*
* Constructor
*/
DirectiveVisitor(Compiler compiler) throws JasperException {
this.pageInfo = compiler.getPageInfo();
this.err = compiler.getErrorDispatcher();
}
public void visit(Node.IncludeDirective n) throws JasperException {
// Since pageDirectiveSeen flag only applies to the Current page
// save it here and restore it after the file is included.
boolean pageEncodingSeenSave = pageEncodingSeen;
pageEncodingSeen = false;
visitBody(n);
pageEncodingSeen = pageEncodingSeenSave;
}
public void visit(Node.PageDirective n) throws JasperException {
JspUtil.checkAttributes("Page directive", n, pageDirectiveAttrs,
err);
// JSP.2.10.1
Attributes attrs = n.getAttributes();
for (int i = 0; attrs != null && i < attrs.getLength(); i++) {
String attr = attrs.getQName(i);
String value = attrs.getValue(i);
if ("language".equals(attr)) {
if (pageInfo.getLanguage(false) == null) {
pageInfo.setLanguage(value, n, err, true);
} else if (!pageInfo.getLanguage(false).equals(value)) {
err.jspError(n, "jsp.error.page.conflict.language",
pageInfo.getLanguage(false), value);
}
} else if ("extends".equals(attr)) {
if (pageInfo.getExtends(false) == null) {
pageInfo.setExtends(value, n);
} else if (!pageInfo.getExtends(false).equals(value)) {
err.jspError(n, "jsp.error.page.conflict.extends",
pageInfo.getExtends(false), value);
}
} else if ("contentType".equals(attr)) {
if (pageInfo.getContentType() == null) {
pageInfo.setContentType(value);
} else if (!pageInfo.getContentType().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.contenttype",
pageInfo.getContentType(), value);
}
} else if ("session".equals(attr)) {
if (pageInfo.getSession() == null) {
pageInfo.setSession(value, n, err);
} else if (!pageInfo.getSession().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.session",
pageInfo.getSession(), value);
}
} else if ("buffer".equals(attr)) {
if (pageInfo.getBufferValue() == null) {
pageInfo.setBufferValue(value, n, err);
} else if (!pageInfo.getBufferValue().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.buffer",
pageInfo.getBufferValue(), value);
}
} else if ("autoFlush".equals(attr)) {
if (pageInfo.getAutoFlush() == null) {
pageInfo.setAutoFlush(value, n, err);
} else if (!pageInfo.getAutoFlush().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.autoflush",
pageInfo.getAutoFlush(), value);
}
} else if ("isThreadSafe".equals(attr)) {
if (pageInfo.getIsThreadSafe() == null) {
pageInfo.setIsThreadSafe(value, n, err);
} else if (!pageInfo.getIsThreadSafe().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.isthreadsafe",
pageInfo.getIsThreadSafe(), value);
}
} else if ("isELIgnored".equals(attr)) {
if (pageInfo.getIsELIgnored() == null) {
pageInfo.setIsELIgnored(value, n, err, true);
} else if (!pageInfo.getIsELIgnored().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.iselignored",
pageInfo.getIsELIgnored(), value);
}
} else if ("isErrorPage".equals(attr)) {
if (pageInfo.getIsErrorPage() == null) {
pageInfo.setIsErrorPage(value, n, err);
} else if (!pageInfo.getIsErrorPage().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.iserrorpage",
pageInfo.getIsErrorPage(), value);
}
} else if ("errorPage".equals(attr)) {
if (pageInfo.getErrorPage() == null) {
pageInfo.setErrorPage(value);
} else if (!pageInfo.getErrorPage().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.errorpage",
pageInfo.getErrorPage(), value);
}
} else if ("info".equals(attr)) {
if (pageInfo.getInfo() == null) {
pageInfo.setInfo(value);
} else if (!pageInfo.getInfo().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.info",
pageInfo.getInfo(), value);
}
} else if ("pageEncoding".equals(attr)) {
if (pageEncodingSeen)
err.jspError(n, "jsp.error.page.multi.pageencoding");
// 'pageEncoding' can occur at most once per file
pageEncodingSeen = true;
String actual = comparePageEncodings(value, n);
n.getRoot().setPageEncoding(actual);
} else if ("deferredSyntaxAllowedAsLiteral".equals(attr)) {
if (pageInfo.getDeferredSyntaxAllowedAsLiteral() == null) {
pageInfo.setDeferredSyntaxAllowedAsLiteral(value, n,
err, true);
} else if (!pageInfo.getDeferredSyntaxAllowedAsLiteral()
.equals(value)) {
err
.jspError(
n,
"jsp.error.page.conflict.deferredsyntaxallowedasliteral",
pageInfo
.getDeferredSyntaxAllowedAsLiteral(),
value);
}
} else if ("trimDirectiveWhitespaces".equals(attr)) {
if (pageInfo.getTrimDirectiveWhitespaces() == null) {
pageInfo.setTrimDirectiveWhitespaces(value, n, err,
true);
} else if (!pageInfo.getTrimDirectiveWhitespaces().equals(
value)) {
err
.jspError(
n,
"jsp.error.page.conflict.trimdirectivewhitespaces",
pageInfo.getTrimDirectiveWhitespaces(),
value);
}
}
}
// Check for bad combinations
if (pageInfo.getBuffer() == 0 && !pageInfo.isAutoFlush())
err.jspError(n, "jsp.error.page.badCombo");
// Attributes for imports for this node have been processed by
// the parsers, just add them to pageInfo.
pageInfo.addImports(n.getImports());
}
public void visit(Node.TagDirective n) throws JasperException {
// Note: Most of the validation is done in TagFileProcessor
// when it created a TagInfo object from the
// tag file in which the directive appeared.
// This method does additional processing to collect page info
Attributes attrs = n.getAttributes();
for (int i = 0; attrs != null && i < attrs.getLength(); i++) {
String attr = attrs.getQName(i);
String value = attrs.getValue(i);
if ("language".equals(attr)) {
if (pageInfo.getLanguage(false) == null) {
pageInfo.setLanguage(value, n, err, false);
} else if (!pageInfo.getLanguage(false).equals(value)) {
err.jspError(n, "jsp.error.tag.conflict.language",
pageInfo.getLanguage(false), value);
}
} else if ("isELIgnored".equals(attr)) {
if (pageInfo.getIsELIgnored() == null) {
pageInfo.setIsELIgnored(value, n, err, false);
} else if (!pageInfo.getIsELIgnored().equals(value)) {
err.jspError(n, "jsp.error.tag.conflict.iselignored",
pageInfo.getIsELIgnored(), value);
}
} else if ("pageEncoding".equals(attr)) {
if (pageEncodingSeen)
err.jspError(n, "jsp.error.tag.multi.pageencoding");
pageEncodingSeen = true;
compareTagEncodings(value, n);
n.getRoot().setPageEncoding(value);
} else if ("deferredSyntaxAllowedAsLiteral".equals(attr)) {
if (pageInfo.getDeferredSyntaxAllowedAsLiteral() == null) {
pageInfo.setDeferredSyntaxAllowedAsLiteral(value, n,
err, false);
} else if (!pageInfo.getDeferredSyntaxAllowedAsLiteral()
.equals(value)) {
err
.jspError(
n,
"jsp.error.tag.conflict.deferredsyntaxallowedasliteral",
pageInfo
.getDeferredSyntaxAllowedAsLiteral(),
value);
}
} else if ("trimDirectiveWhitespaces".equals(attr)) {
if (pageInfo.getTrimDirectiveWhitespaces() == null) {
pageInfo.setTrimDirectiveWhitespaces(value, n, err,
false);
} else if (!pageInfo.getTrimDirectiveWhitespaces().equals(
value)) {
err
.jspError(
n,
"jsp.error.tag.conflict.trimdirectivewhitespaces",
pageInfo.getTrimDirectiveWhitespaces(),
value);
}
}
}
// Attributes for imports for this node have been processed by
// the parsers, just add them to pageInfo.
pageInfo.addImports(n.getImports());
}
public void visit(Node.AttributeDirective n) throws JasperException {
// Do nothing, since this attribute directive has already been
// validated by TagFileProcessor when it created a TagInfo object
// from the tag file in which the directive appeared
}
public void visit(Node.VariableDirective n) throws JasperException {
// Do nothing, since this variable directive has already been
// validated by TagFileProcessor when it created a TagInfo object
// from the tag file in which the directive appeared
}
/*
* Compares page encodings specified in various places, and throws
* exception in case of page encoding mismatch.
*
* @param pageDirEnc The value of the pageEncoding attribute of the page
* directive @param pageDir The page directive node
*
* @throws JasperException in case of page encoding mismatch
*/
private String comparePageEncodings(String pageDirEnc,
Node.PageDirective pageDir) throws JasperException {
Node.Root root = pageDir.getRoot();
String configEnc = root.getJspConfigPageEncoding();
/*
* Compare the 'pageEncoding' attribute of the page directive with
* the encoding specified in the JSP config element whose URL
* pattern matches this page. Treat "UTF-16", "UTF-16BE", and
* "UTF-16LE" as identical.
*/
if (configEnc != null) {
if (!pageDirEnc.equals(configEnc)
&& (!pageDirEnc.startsWith("UTF-16") || !configEnc
.startsWith("UTF-16"))) {
err.jspError(pageDir,
"jsp.error.config_pagedir_encoding_mismatch",
configEnc, pageDirEnc);
} else {
return configEnc;
}
}
/*
* Compare the 'pageEncoding' attribute of the page directive with
* the encoding specified in the XML prolog (only for XML syntax,
* and only if JSP document contains XML prolog with encoding
* declaration). Treat "UTF-16", "UTF-16BE", and "UTF-16LE" as
* identical.
*/
if ((root.isXmlSyntax() && root.isEncodingSpecifiedInProlog()) || root.isBomPresent()) {
String pageEnc = root.getPageEncoding();
if (!pageDirEnc.equals(pageEnc)
&& (!pageDirEnc.startsWith("UTF-16") || !pageEnc
.startsWith("UTF-16"))) {
err.jspError(pageDir,
"jsp.error.prolog_pagedir_encoding_mismatch",
pageEnc, pageDirEnc);
} else {
return pageEnc;
}
}
return pageDirEnc;
}
/*
* Compares page encodings specified in various places, and throws
* exception in case of page encoding mismatch.
*
* @param pageDirEnc The value of the pageEncoding attribute of the page
* directive @param pageDir The page directive node
*
* @throws JasperException in case of page encoding mismatch
*/
private void compareTagEncodings(String pageDirEnc,
Node.TagDirective pageDir) throws JasperException {
Node.Root root = pageDir.getRoot();
/*
* Compare the 'pageEncoding' attribute of the page directive with
* the encoding specified in the XML prolog (only for XML syntax,
* and only if JSP document contains XML prolog with encoding
* declaration). Treat "UTF-16", "UTF-16BE", and "UTF-16LE" as
* identical.
*/
if ((root.isXmlSyntax() && root.isEncodingSpecifiedInProlog()) || root.isBomPresent()) {
String pageEnc = root.getPageEncoding();
if (!pageDirEnc.equals(pageEnc)
&& (!pageDirEnc.startsWith("UTF-16") || !pageEnc
.startsWith("UTF-16"))) {
err.jspError(pageDir,
"jsp.error.prolog_pagedir_encoding_mismatch",
pageEnc, pageDirEnc);
}
}
}
}
/**
* A visitor for validating nodes other than page directives
*/
static class ValidateVisitor extends Node.Visitor {
private PageInfo pageInfo;
private ErrorDispatcher err;
private TagInfo tagInfo;
private ClassLoader loader;
private final StringBuffer buf = new StringBuffer(32);
private static final JspUtil.ValidAttribute[] jspRootAttrs = {
new JspUtil.ValidAttribute("xsi:schemaLocation"),
new JspUtil.ValidAttribute("version", true) };
private static final JspUtil.ValidAttribute[] includeDirectiveAttrs = { new JspUtil.ValidAttribute(
"file", true) };
private static final JspUtil.ValidAttribute[] taglibDirectiveAttrs = {
new JspUtil.ValidAttribute("uri"),
new JspUtil.ValidAttribute("tagdir"),
new JspUtil.ValidAttribute("prefix", true) };
private static final JspUtil.ValidAttribute[] includeActionAttrs = {
new JspUtil.ValidAttribute("page", true, true),
new JspUtil.ValidAttribute("flush") };
private static final JspUtil.ValidAttribute[] paramActionAttrs = {
new JspUtil.ValidAttribute("name", true),
new JspUtil.ValidAttribute("value", true, true) };
private static final JspUtil.ValidAttribute[] forwardActionAttrs = { new JspUtil.ValidAttribute(
"page", true, true) };
private static final JspUtil.ValidAttribute[] getPropertyAttrs = {
new JspUtil.ValidAttribute("name", true),
new JspUtil.ValidAttribute("property", true) };
private static final JspUtil.ValidAttribute[] setPropertyAttrs = {
new JspUtil.ValidAttribute("name", true),
new JspUtil.ValidAttribute("property", true),
new JspUtil.ValidAttribute("value", false, true),
new JspUtil.ValidAttribute("param") };
private static final JspUtil.ValidAttribute[] useBeanAttrs = {
new JspUtil.ValidAttribute("id", true),
new JspUtil.ValidAttribute("scope"),
new JspUtil.ValidAttribute("class"),
new JspUtil.ValidAttribute("type"),
new JspUtil.ValidAttribute("beanName", false, true) };
private static final JspUtil.ValidAttribute[] plugInAttrs = {
new JspUtil.ValidAttribute("type", true),
new JspUtil.ValidAttribute("code", true),
new JspUtil.ValidAttribute("codebase"),
new JspUtil.ValidAttribute("align"),
new JspUtil.ValidAttribute("archive"),
new JspUtil.ValidAttribute("height", false, true),
new JspUtil.ValidAttribute("hspace"),
new JspUtil.ValidAttribute("jreversion"),
new JspUtil.ValidAttribute("name"),
new JspUtil.ValidAttribute("vspace"),
new JspUtil.ValidAttribute("width", false, true),
new JspUtil.ValidAttribute("nspluginurl"),
new JspUtil.ValidAttribute("iepluginurl") };
private static final JspUtil.ValidAttribute[] attributeAttrs = {
new JspUtil.ValidAttribute("name", true),
new JspUtil.ValidAttribute("trim") };
private static final JspUtil.ValidAttribute[] invokeAttrs = {
new JspUtil.ValidAttribute("fragment", true),
new JspUtil.ValidAttribute("var"),
new JspUtil.ValidAttribute("varReader"),
new JspUtil.ValidAttribute("scope") };
private static final JspUtil.ValidAttribute[] doBodyAttrs = {
new JspUtil.ValidAttribute("var"),
new JspUtil.ValidAttribute("varReader"),
new JspUtil.ValidAttribute("scope") };
private static final JspUtil.ValidAttribute[] jspOutputAttrs = {
new JspUtil.ValidAttribute("omit-xml-declaration"),
new JspUtil.ValidAttribute("doctype-root-element"),
new JspUtil.ValidAttribute("doctype-public"),
new JspUtil.ValidAttribute("doctype-system") };
/*
* Constructor
*/
ValidateVisitor(Compiler compiler) {
this.pageInfo = compiler.getPageInfo();
this.err = compiler.getErrorDispatcher();
this.tagInfo = compiler.getCompilationContext().getTagInfo();
this.loader = compiler.getCompilationContext().getClassLoader();
}
public void visit(Node.JspRoot n) throws JasperException {
JspUtil.checkAttributes("Jsp:root", n, jspRootAttrs, err);
String version = n.getTextAttribute("version");
if (!version.equals("1.2") && !version.equals("2.0") && !version.equals("2.1")) {
err.jspError(n, "jsp.error.jsproot.version.invalid", version);
}
visitBody(n);
}
public void visit(Node.IncludeDirective n) throws JasperException {
JspUtil.checkAttributes("Include directive", n,
includeDirectiveAttrs, err);
visitBody(n);
}
public void visit(Node.TaglibDirective n) throws JasperException {
JspUtil.checkAttributes("Taglib directive", n,
taglibDirectiveAttrs, err);
// Either 'uri' or 'tagdir' attribute must be specified
String uri = n.getAttributeValue("uri");
String tagdir = n.getAttributeValue("tagdir");
if (uri == null && tagdir == null) {
err.jspError(n, "jsp.error.taglibDirective.missing.location");
}
if (uri != null && tagdir != null) {
err
.jspError(n,
"jsp.error.taglibDirective.both_uri_and_tagdir");
}
}
public void visit(Node.ParamAction n) throws JasperException {
JspUtil.checkAttributes("Param action", n, paramActionAttrs, err);
// make sure the value of the 'name' attribute is not a
// request-time expression
throwErrorIfExpression(n, "name", "jsp:param");
n.setValue(getJspAttribute(null, "value", null, null, n
.getAttributeValue("value"), java.lang.String.class, n,
false));
visitBody(n);
}
public void visit(Node.ParamsAction n) throws JasperException {
// Make sure we've got at least one nested jsp:param
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
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