org.apache.jasper.compiler.Generator Maven / Gradle / Ivy
/*
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*
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*
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* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
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* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
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* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.HashSet;
import javax.el.ValueExpression;
import javax.el.MethodExpression;
import javax.servlet.jsp.tagext.TagAttributeInfo;
import javax.servlet.jsp.tagext.TagInfo;
import javax.servlet.jsp.tagext.TagVariableInfo;
import javax.servlet.jsp.tagext.VariableInfo;
import javax.servlet.jsp.tagext.JspIdConsumer;
import org.apache.jasper.Constants;
import org.apache.jasper.JasperException;
import org.apache.jasper.JspCompilationContext;
import org.apache.jasper.runtime.JspRuntimeLibrary;
import org.xml.sax.Attributes;
/**
* Generate Java source from Nodes
*
* @author Anil K. Vijendran
* @author Danno Ferrin
* @author Mandar Raje
* @author Rajiv Mordani
* @author Pierre Delisle
*
* Tomcat 4.1.x and Tomcat 5:
* @author Kin-man Chung
* @author Jan Luehe
* @author Shawn Bayern
* @author Mark Roth
* @author Denis Benoit
*/
class Generator {
private static final Class[] OBJECT_CLASS = { Object.class };
private ServletWriter out;
private ArrayList methodsBuffered;
private FragmentHelperClass fragmentHelperClass;
private ErrorDispatcher err;
private BeanRepository beanInfo;
private JspCompilationContext ctxt;
private boolean isPoolingEnabled;
private boolean breakAtLF;
private boolean genBytes;
private PageInfo pageInfo;
private Set tagHandlerPoolNames;
private GenBuffer arrayBuffer;
/**
* @param s the input string
* @return quoted and escaped string, per Java rule
*/
static String quote(String s) {
if (s == null)
return "null";
return '"' + escape(s) + '"';
}
/**
* @param s the input string
* @return escaped string, per Java rule
*/
static String escape(String s) {
if (s == null)
return "";
StringBuilder b = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
if (c == '"')
b.append('\\').append('"');
else if (c == '\\')
b.append('\\').append('\\');
else if (c == '\n')
b.append('\\').append('n');
else if (c == '\r')
b.append('\\').append('r');
else
b.append(c);
}
return b.toString();
}
/**
* Single quote and escape a character
*/
static String quote(char c) {
StringBuilder b = new StringBuilder();
b.append('\'');
if (c == '\'')
b.append('\\').append('\'');
else if (c == '\\')
b.append('\\').append('\\');
else if (c == '\n')
b.append('\\').append('n');
else if (c == '\r')
b.append('\\').append('r');
else
b.append(c);
b.append('\'');
return b.toString();
}
/**
* Generates declarations. This includes "info" of the page directive,
* and scriptlet declarations.
*/
private void generateDeclarations(Node.Nodes page) throws JasperException {
class DeclarationVisitor extends Node.Visitor {
private boolean getServletInfoGenerated = false;
/*
* Generates getServletInfo() method that returns the value of the
* page directive's 'info' attribute, if present.
*
* The Validator has already ensured that if the translation unit
* contains more than one page directive with an 'info' attribute,
* their values match.
*/
public void visit(Node.PageDirective n) throws JasperException {
if (getServletInfoGenerated) {
return;
}
String info = n.getAttributeValue("info");
if (info == null)
return;
getServletInfoGenerated = true;
out.printil("public String getServletInfo() {");
out.pushIndent();
out.printin("return ");
out.print(quote(info));
out.println(";");
out.popIndent();
out.printil("}");
out.println();
}
public void visit(Node.Declaration n) throws JasperException {
n.setBeginJavaLine(out.getJavaLine());
out.printMultiLn(n.getText());
out.println();
n.setEndJavaLine(out.getJavaLine());
}
// Custom Tags may contain declarations from tag plugins.
public void visit(Node.CustomTag n) throws JasperException {
if (n.useTagPlugin()) {
if (n.getAtSTag() != null) {
n.getAtSTag().visit(this);
}
visitBody(n);
if (n.getAtETag() != null) {
n.getAtETag().visit(this);
}
} else {
visitBody(n);
}
}
}
out.println();
page.visit(new DeclarationVisitor());
}
/**
* Compiles list of tag handler pool names.
*/
private void compileTagHandlerPoolList(Node.Nodes page)
throws JasperException {
class TagHandlerPoolVisitor extends Node.Visitor {
private Set names = new HashSet();
/*
* Constructor
*
* @param v Set of tag handler pool names to populate
*/
TagHandlerPoolVisitor(Set v) {
names = v;
}
/*
* Gets the name of the tag handler pool for the given custom tag
* and adds it to the list of tag handler pool names unless it is
* already contained in it.
*/
public void visit(Node.CustomTag n) throws JasperException {
if (!n.implementsSimpleTag()) {
String name =
createTagHandlerPoolName(
n.getPrefix(),
n.getLocalName(),
n.getAttributes(),
n.hasEmptyBody());
n.setTagHandlerPoolName(name);
if (!names.contains(name)) {
names.add(name);
}
}
visitBody(n);
}
/*
* Creates the name of the tag handler pool whose tag handlers may
* be (re)used to service this action.
*
* @return The name of the tag handler pool
*/
private String createTagHandlerPoolName(
String prefix,
String shortName,
Attributes attrs,
boolean hasEmptyBody) {
String poolName = null;
poolName = "_jspx_tagPool_" + prefix + "_" + shortName;
if (attrs != null) {
String[] attrNames = new String[attrs.getLength()];
for (int i = 0; i < attrNames.length; i++) {
attrNames[i] = attrs.getQName(i);
}
Arrays.sort(attrNames, Collections.reverseOrder());
for (int i = 0; i < attrNames.length; i++) {
poolName = poolName + "_" + attrNames[i];
}
}
if (hasEmptyBody) {
poolName = poolName + "_nobody";
}
return JspUtil.makeXmlJavaIdentifier(poolName);
}
}
page.visit(new TagHandlerPoolVisitor(tagHandlerPoolNames));
}
/**
* Generates the _jspInit() method for instantiating the tag handler pools.
* For tag file, _jspInit has to be invoked manually, and the ServletConfig
* object explicitly passed.
*/
private void generateTagHandlerInit() {
if (!isPoolingEnabled || tagHandlerPoolNames.isEmpty()) {
return;
}
if (ctxt.isTagFile()) {
out.printil("private void _jspInit(ServletConfig config) {");
} else {
out.printil("public void _jspInit() {");
}
out.pushIndent();
for (String tagHandlerPoolName: tagHandlerPoolNames) {
out.printin(tagHandlerPoolName);
out.print(
" = org.apache.jasper.runtime.TagHandlerPool.getTagHandlerPool(");
if (ctxt.isTagFile()) {
out.print("config");
} else {
out.print("getServletConfig()");
}
out.println(");");
}
out.popIndent();
out.printil("}");
out.println();
}
/**
* Generates the _jspDestroy() method which is responsible for calling the
* release() method on every tag handler in any of the tag handler pools.
*/
private void generateTagHandlerDestroy() {
if (!isPoolingEnabled || tagHandlerPoolNames.isEmpty()) {
return;
}
out.printil("public void _jspDestroy() {");
out.pushIndent();
for (String tagHandlerPoolName: tagHandlerPoolNames) {
out.printin(tagHandlerPoolName);
out.println(".release();");
}
out.popIndent();
out.printil("}");
out.println();
}
/**
* Generate preamble package name
* (shared by servlet and tag handler preamble generation)
*/
private void genPreamblePackage(String packageName)
throws JasperException {
if (!"".equals(packageName) && packageName != null) {
out.printil("package " + packageName + ";");
out.println();
}
}
/**
* Generate preamble imports
* (shared by servlet and tag handler preamble generation)
*/
private void genPreambleImports() throws JasperException {
Iterator iter = pageInfo.getImports().iterator();
while (iter.hasNext()) {
out.printin("import ");
out.print(iter.next());
out.println(";");
}
out.println();
}
/**
* Generation of static initializers in preamble.
* For example, dependant list, el function map, prefix map.
* (shared by servlet and tag handler preamble generation)
*/
private void genPreambleStaticInitializers() throws JasperException {
out.printil("private static final JspFactory _jspxFactory = JspFactory.getDefaultFactory();");
out.println();
// Static data for getDependants()
out.printil("private static java.util.List _jspx_dependants;");
out.println();
List dependants = pageInfo.getDependants();
Iterator iter = dependants.iterator();
if (!dependants.isEmpty()) {
out.printil("static {");
out.pushIndent();
out.printin("_jspx_dependants = new java.util.ArrayList(");
out.print("" + dependants.size());
out.println(");");
while (iter.hasNext()) {
out.printin("_jspx_dependants.add(\"");
out.print(iter.next());
out.println("\");");
}
out.popIndent();
out.printil("}");
out.println();
}
// Codes to support genStringAsByteArray option
// Generate a static variable for the initial response encoding
if (genBytes) {
// first get the respons encoding
String contentType = pageInfo.getContentType();
String encoding = "ISO-8859-1";
int i = contentType.indexOf("charset=");
if (i > 0)
encoding = contentType.substring(i+8);
// Make sure the encoding is supported
// Assume that this can be determined at compile time
try {
"testing".getBytes(encoding);
out.printin("private static final String _jspx_encoding = ");
out.print(quote(encoding));
out.println(";");
out.printil("private boolean _jspx_gen_bytes = true;");
out.printil("private boolean _jspx_encoding_tested;");
} catch (java.io.UnsupportedEncodingException ex) {
genBytes = false;
}
}
}
/**
* Declare tag handler pools (tags of the same type and with the same
* attribute set share the same tag handler pool)
* (shared by servlet and tag handler preamble generation)
*/
private void genPreambleClassVariableDeclarations(String className)
throws JasperException {
if (isPoolingEnabled) {
if (!tagHandlerPoolNames.isEmpty()) {
for (String tagHandlerPoolName: tagHandlerPoolNames) {
out.printil(
"private org.apache.jasper.runtime.TagHandlerPool "
+ tagHandlerPoolName + ";");
}
out.println();
}
}
out.printil("private org.glassfish.jsp.api.ResourceInjector "
+ "_jspx_resourceInjector;");
out.println();
}
/**
* Declare general-purpose methods
* (shared by servlet and tag handler preamble generation)
*/
private void genPreambleMethods() throws JasperException {
// Method used to get compile time file dependencies
out.printil("public java.util.List getDependants() {");
out.pushIndent();
out.printil("return _jspx_dependants;");
out.popIndent();
out.printil("}");
out.println();
// Method to get bytes from String
if (genBytes) {
out.printil("private static byte[] _jspx_getBytes(String s) {");
out.pushIndent();
out.printil("try {");
out.pushIndent();
out.printil("return s.getBytes(_jspx_encoding);");
out.popIndent();
out.printil("} catch (java.io.UnsupportedEncodingException ex) {");
out.printil("}");
out.printil("return null;");
out.popIndent();
out.printil("}");
out.println();
// Generate code to see if the response encoding has been set
// differently from the encoding declared in the page directive.
// Note that we only need to do the test once. The assumption
// is that the encoding cannot be changed once some data has been
// written.
out.printil("private boolean _jspx_same_encoding(String encoding) {");
out.pushIndent();
out.printil("if (! _jspx_encoding_tested) {");
out.pushIndent();
out.printil("_jspx_gen_bytes = _jspx_encoding.equals(encoding);");
out.printil("_jspx_encoding_tested = true;");
out.popIndent();
out.printil("}");
out.printil("return _jspx_gen_bytes;");
out.popIndent();
out.printil("}");
out.println();
}
generateTagHandlerInit();
generateTagHandlerDestroy();
}
/**
* Generates the beginning of the static portion of the servlet.
*/
private void generatePreamble(Node.Nodes page) throws JasperException {
String servletPackageName = ctxt.getServletPackageName();
String servletClassName = ctxt.getServletClassName();
String serviceMethodName = Constants.SERVICE_METHOD_NAME;
// First the package name:
genPreamblePackage(servletPackageName);
// Generate imports
genPreambleImports();
// Generate class declaration
out.printin("public final class ");
out.print(servletClassName);
out.print(" extends ");
out.println(pageInfo.getExtends());
out.printin(
" implements org.apache.jasper.runtime.JspSourceDependent");
if (!pageInfo.isThreadSafe()) {
out.println(",");
out.printin(" SingleThreadModel");
}
out.println(" {");
out.pushIndent();
// Class body begins here
generateDeclarations(page);
// Static initializations here
genPreambleStaticInitializers();
// Class variable declarations
genPreambleClassVariableDeclarations(servletClassName);
// Constructor
// generateConstructor(className);
// Methods here
genPreambleMethods();
// Now the service method
out.printin("public void ");
out.print(serviceMethodName);
out.println(
"(HttpServletRequest request, HttpServletResponse response)");
out.println(" throws java.io.IOException, ServletException {");
out.pushIndent();
out.println();
// Local variable declarations
out.printil("PageContext pageContext = null;");
if (pageInfo.isSession())
out.printil("HttpSession session = null;");
if (pageInfo.isErrorPage()) {
out.printil(
"Throwable exception = org.apache.jasper.runtime.JspRuntimeLibrary.getThrowable(request);");
out.printil("if (exception != null) {");
out.pushIndent();
out.printil(
"response.setStatus((Integer)request.getAttribute(\"javax.servlet.error.status_code\"));");
out.popIndent();
out.printil("}");
}
out.printil("ServletContext application = null;");
out.printil("ServletConfig config = null;");
out.printil("JspWriter out = null;");
out.printil("Object page = this;");
out.printil("JspWriter _jspx_out = null;");
out.printil("PageContext _jspx_page_context = null;");
out.println();
out.printil("try {");
out.pushIndent();
out.printin("response.setContentType(");
out.print(quote(pageInfo.getContentType()));
out.println(");");
if (ctxt.getOptions().isXpoweredBy()) {
out.printil("response.setHeader(\"X-Powered-By\", \"" +
Constants.JSP_NAME + "\");");
}
out.printil(
"pageContext = _jspxFactory.getPageContext(this, request, response,");
out.printin("\t\t\t");
out.print(quote(pageInfo.getErrorPage()));
out.print(", " + pageInfo.isSession());
out.print(", " + pageInfo.getBuffer());
out.print(", " + pageInfo.isAutoFlush());
out.println(");");
out.printil("_jspx_page_context = pageContext;");
out.printil("application = pageContext.getServletContext();");
out.printil("config = pageContext.getServletConfig();");
if (pageInfo.isSession())
out.printil("session = pageContext.getSession();");
out.printil("out = pageContext.getOut();");
out.printil("_jspx_out = out;");
out.printil("_jspx_resourceInjector = (org.glassfish.jsp.api.ResourceInjector) application.getAttribute(\"com.sun.appserv.jsp.resource.injector\");");
out.println();
}
/**
* Generates an XML Prolog, which includes an XML declaration and
* an XML doctype declaration.
*/
private void generateXmlProlog(Node.Nodes page) {
/*
* An XML declaration is generated under the following conditions:
*
* - 'omit-xml-declaration' attribute of action is set to
* "no" or "false"
* - JSP document without a
*/
String omitXmlDecl = pageInfo.getOmitXmlDecl();
if ((omitXmlDecl != null && !JspUtil.booleanValue(omitXmlDecl))
|| (omitXmlDecl == null
&& page.getRoot().isXmlSyntax()
&& !pageInfo.hasJspRoot()
&& !ctxt.isTagFile())) {
String cType = pageInfo.getContentType();
String charSet = cType.substring(cType.indexOf("charset=") + 8);
out.printil(
"out.write(\"\\n\");");
}
/*
* Output a DOCTYPE declaration if the doctype-root-element appears.
* If doctype-public appears:
*
* else
*
*/
String doctypeName = pageInfo.getDoctypeName();
if (doctypeName != null) {
String doctypePublic = pageInfo.getDoctypePublic();
String doctypeSystem = pageInfo.getDoctypeSystem();
out.printin("out.write(\"\\n\");");
}
}
/*
* Generates the constructor.
* (shared by servlet and tag handler preamble generation)
*/
private void generateConstructor(String className) {
out.printil("public " + className + "() {");
out.printil("}");
out.println();
}
/**
* A visitor that generates codes for the elements in the page.
*/
class GenerateVisitor extends Node.Visitor {
/*
* HashMap containing introspection information on tag handlers:
* : tag prefix
* : hashtable containing introspection on tag handlers:
* : tag short name
* : introspection info of tag handler for
* tag
*/
private HashMap> handlerInfos;
private HashMap tagVarNumbers;
private String parent;
private boolean isSimpleTagParent; // Is parent a SimpleTag?
private String pushBodyCountVar;
private String simpleTagHandlerVar;
private boolean isSimpleTagHandler;
private boolean isFragment;
private boolean isTagFile;
private ServletWriter out;
private ArrayList methodsBuffered;
private FragmentHelperClass fragmentHelperClass;
private int methodNesting;
private int arrayCount;
private HashMap textMap;
/**
* Constructor.
*/
public GenerateVisitor(
boolean isTagFile,
ServletWriter out,
ArrayList methodsBuffered,
FragmentHelperClass fragmentHelperClass) {
this.isTagFile = isTagFile;
this.out = out;
this.methodsBuffered = methodsBuffered;
this.fragmentHelperClass = fragmentHelperClass;
methodNesting = 0;
handlerInfos = new HashMap>();
tagVarNumbers = new HashMap();
textMap = new HashMap();
}
/**
* Returns an attribute value, optionally URL encoded. If
* the value is a runtime expression, the result is the expression
* itself, as a string. If the result is an EL expression, we insert
* a call to the interpreter. If the result is a Named Attribute
* we insert the generated variable name. Otherwise the result is a
* string literal, quoted and escaped.
*
* @param attr An JspAttribute object
* @param encode true if to be URL encoded
* @param expectedType the expected type for an EL evaluation
* (ignored for attributes that aren't EL expressions)
*/
private String attributeValue(
Node.JspAttribute attr,
boolean encode,
Class expectedType) {
String v = attr.getValue();
if (!attr.isNamedAttribute() && (v == null))
return "";
if (attr.isExpression()) {
if (encode) {
return "org.apache.jasper.runtime.JspRuntimeLibrary.URLEncode(String.valueOf("
+ v
+ "), request.getCharacterEncoding())";
}
return v;
} else if (attr.isELInterpreterInput()) {
v = JspUtil.interpreterCall(
this.isTagFile,
v,
expectedType,
attr.getEL().getMapName(),
null, null, null);
if (encode) {
return "org.apache.jasper.runtime.JspRuntimeLibrary.URLEncode("
+ v
+ ", request.getCharacterEncoding())";
}
return v;
} else if (attr.isNamedAttribute()) {
return attr.getNamedAttributeNode().getTemporaryVariableName();
} else {
if (encode) {
return "org.apache.jasper.runtime.JspRuntimeLibrary.URLEncode("
+ quote(v)
+ ", request.getCharacterEncoding())";
}
return quote(v);
}
}
/**
* Prints the attribute value specified in the param action, in the
* form of name=value string.
*
* @param n the parent node for the param action nodes.
*/
private void printParams(Node n, String pageParam, boolean literal)
throws JasperException {
class ParamVisitor extends Node.Visitor {
String separator;
ParamVisitor(String separator) {
this.separator = separator;
}
public void visit(Node.ParamAction n) throws JasperException {
out.print(" + ");
out.print(separator);
out.print(" + ");
out.print(
"org.apache.jasper.runtime.JspRuntimeLibrary.URLEncode("
+ quote(n.getTextAttribute("name"))
+ ", request.getCharacterEncoding())");
out.print("+ \"=\" + ");
out.print(attributeValue(n.getValue(), true, String.class));
// The separator is '&' after the second use
separator = "\"&\"";
}
}
String sep;
if (literal) {
sep = pageParam.indexOf('?') > 0 ? "\"&\"" : "\"?\"";
} else {
sep = "((" + pageParam + ").indexOf('?')>0? '&': '?')";
}
if (n.getBody() != null) {
n.getBody().visit(new ParamVisitor(sep));
}
}
public void visit(Node.Expression n) throws JasperException {
n.setBeginJavaLine(out.getJavaLine());
out.printil("out.print(" + n.getText() + ");");
n.setEndJavaLine(out.getJavaLine());
}
public void visit(Node.Scriptlet n) throws JasperException {
n.setBeginJavaLine(out.getJavaLine());
out.printMultiLn(n.getText());
out.println();
n.setEndJavaLine(out.getJavaLine());
}
public void visit(Node.ELExpression n) throws JasperException {
n.setBeginJavaLine(out.getJavaLine());
if (n.getEL() != null) {
out.printil(
"out.write("
+ JspUtil.interpreterCall(
this.isTagFile,
n.getText(),
String.class,
n.getEL().getMapName(),
null, null, null)
+ ");");
} else {
out.printil(
"out.write("
+ quote(n.getText())
+ ");");
}
n.setEndJavaLine(out.getJavaLine());
}
public void visit(Node.IncludeAction n) throws JasperException {
String flush = n.getTextAttribute("flush");
Node.JspAttribute page = n.getPage();
boolean isFlush = false; // default to false;
if ("true".equals(flush))
isFlush = true;
n.setBeginJavaLine(out.getJavaLine());
String pageParam;
if (page.isNamedAttribute()) {
// If the page for jsp:include was specified via
// jsp:attribute, first generate code to evaluate
// that body.
pageParam =
generateNamedAttributeValue(page.getNamedAttributeNode());
} else {
pageParam = attributeValue(page, false, String.class);
}
// If any of the params have their values specified by
// jsp:attribute, prepare those values first.
Node jspBody = findJspBody(n);
if (jspBody != null) {
prepareParams(jspBody);
} else {
prepareParams(n);
}
out.printin(
"org.apache.jasper.runtime.JspRuntimeLibrary.include(request, response, "
+ pageParam);
printParams(n, pageParam, page.isLiteral());
out.println(", out, " + isFlush + ");");
n.setEndJavaLine(out.getJavaLine());
}
/**
* Scans through all child nodes of the given parent for
* subelements. For each element, if its value
* is specified via a Named Attribute (),
* generate the code to evaluate those bodies first.
*
* If parent is null, simply returns.
*/
private void prepareParams(Node parent) throws JasperException {
if (parent == null)
return;
Node.Nodes subelements = parent.getBody();
if (subelements != null) {
for (int i = 0; i < subelements.size(); i++) {
Node n = subelements.getNode(i);
if (n instanceof Node.ParamAction) {
Node.Nodes paramSubElements = n.getBody();
for (int j = 0;
(paramSubElements != null)
&& (j < paramSubElements.size());
j++) {
Node m = paramSubElements.getNode(j);
if (m instanceof Node.NamedAttribute) {
generateNamedAttributeValue(
(Node.NamedAttribute)m);
}
}
}
}
}
}
/**
* Finds the subelement of the given parent node.
* If not found, null is returned.
*/
private Node.JspBody findJspBody(Node parent) throws JasperException {
Node.JspBody result = null;
Node.Nodes subelements = parent.getBody();
for (int i = 0;
(subelements != null) && (i < subelements.size());
i++) {
Node n = subelements.getNode(i);
if (n instanceof Node.JspBody) {
result = (Node.JspBody)n;
break;
}
}
return result;
}
public void visit(Node.ForwardAction n) throws JasperException {
Node.JspAttribute page = n.getPage();
n.setBeginJavaLine(out.getJavaLine());
out.printil("if (true) {"); // So that javac won't complain about
out.pushIndent(); // codes after "return"
String pageParam;
if (page.isNamedAttribute()) {
// If the page for jsp:forward was specified via
// jsp:attribute, first generate code to evaluate
// that body.
pageParam =
generateNamedAttributeValue(page.getNamedAttributeNode());
} else {
pageParam = attributeValue(page, false, String.class);
}
// If any of the params have their values specified by
// jsp:attribute, prepare those values first.
Node jspBody = findJspBody(n);
if (jspBody != null) {
prepareParams(jspBody);
} else {
prepareParams(n);
}
out.printin("_jspx_page_context.forward(");
out.print(pageParam);
printParams(n, pageParam, page.isLiteral());
out.println(");");
if (isTagFile || isFragment) {
out.printil("throw new SkipPageException();");
} else {
out.printil((methodNesting > 0) ? "return true;" : "return;");
}
out.popIndent();
out.printil("}");
n.setEndJavaLine(out.getJavaLine());
// XXX Not sure if we can eliminate dead codes after this.
}
public void visit(Node.GetProperty n) throws JasperException {
String name = n.getTextAttribute("name");
String property = n.getTextAttribute("property");
n.setBeginJavaLine(out.getJavaLine());
if (beanInfo.checkVariable(name)) {
// Bean is defined using useBean, introspect at compile time
Class bean = beanInfo.getBeanType(name);
String beanName = JspUtil.getCanonicalName(bean);
java.lang.reflect.Method meth =
JspRuntimeLibrary.getReadMethod(bean, property);
String methodName = meth.getName();
out.printil(
"out.write(org.apache.jasper.runtime.JspRuntimeLibrary.toString("
+ "((("
+ beanName
+ ")_jspx_page_context.findAttribute("
+ "\""
+ name
+ "\"))."
+ methodName
+ "())));");
} else {
// The object could be a custom action with an associated
// VariableInfo entry for this name.
// Get the class name and then introspect at runtime.
out.printil(
"out.write(org.apache.jasper.runtime.JspRuntimeLibrary.toString"
+ "(org.apache.jasper.runtime.JspRuntimeLibrary.handleGetProperty"
+ "(_jspx_page_context.findAttribute(\""
+ name
+ "\"), \""
+ property
+ "\")));");
}
n.setEndJavaLine(out.getJavaLine());
}
public void visit(Node.SetProperty n) throws JasperException {
String name = n.getTextAttribute("name");
String property = n.getTextAttribute("property");
String param = n.getTextAttribute("param");
Node.JspAttribute value = n.getValue();
n.setBeginJavaLine(out.getJavaLine());
if ("*".equals(property)) {
out.printil(
"org.apache.jasper.runtime.JspRuntimeLibrary.introspect("
+ "_jspx_page_context.findAttribute("
+ "\""
+ name
+ "\"), request);");
} else if (value == null) {
if (param == null)
param = property; // default to same as property
out.printil(
"org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper("
+ "_jspx_page_context.findAttribute(\""
+ name
+ "\"), \""
+ property
+ "\", request.getParameter(\""
+ param
+ "\"), "
+ "request, \""
+ param
+ "\", false);");
} else if (value.isExpression()) {
out.printil(
"org.apache.jasper.runtime.JspRuntimeLibrary.handleSetProperty("
+ "_jspx_page_context.findAttribute(\""
+ name
+ "\"), \""
+ property
+ "\",");
out.print(attributeValue(value, false, null));
out.println(");");
} else if (value.isELInterpreterInput()) {
// We've got to resolve the very call to the interpreter
// at runtime since we don't know what type to expect
// in the general case; we thus can't hard-wire the call
// into the generated code. (XXX We could, however,
// optimize the case where the bean is exposed with
// , much as the code here does for
// getProperty.)
out.printil(
"org.apache.jasper.runtime.JspRuntimeLibrary.handleSetPropertyExpression("
+ "_jspx_page_context.findAttribute(\""
+ name
+ "\"), \""
+ property
+ "\", "
+ quote(value.getValue())
+ ", "
+ "_jspx_page_context, "
+ value.getEL().getMapName()
+ ");");
} else if (value.isNamedAttribute()) {
// If the value for setProperty was specified via
// jsp:attribute, first generate code to evaluate
// that body.
String valueVarName =
generateNamedAttributeValue(value.getNamedAttributeNode());
out.printil(
"org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper("
+ "_jspx_page_context.findAttribute(\""
+ name
+ "\"), \""
+ property
+ "\", "
+ valueVarName
+ ", null, null, false);");
} else {
out.printin(
"org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper("
+ "_jspx_page_context.findAttribute(\""
+ name
+ "\"), \""
+ property
+ "\", ");
out.print(attributeValue(value, false, null));
out.println(", null, null, false);");
}
n.setEndJavaLine(out.getJavaLine());
}
public void visit(Node.UseBean n) throws JasperException {
String name = n.getTextAttribute("id");
String scope = n.getTextAttribute("scope");
String klass = n.getTextAttribute("class");
String type = n.getTextAttribute("type");
Node.JspAttribute beanName = n.getBeanName();
// If "class" is specified, try an instantiation at compile time
boolean generateNew = false;
String canonicalName = null; // Canonical name for klass
if (klass != null) {
try {
Class bean = ctxt.getClassLoader().loadClass(klass);
if (klass.indexOf('$') >= 0) {
// Obtain the canonical type name
canonicalName = JspUtil.getCanonicalName(bean);
} else {
canonicalName = klass;
}
int modifiers = bean.getModifiers();
if (!Modifier.isPublic(modifiers) ||
Modifier.isInterface(modifiers) ||
Modifier.isAbstract(modifiers)) {
throw new Exception("Invalid bean class modifier");
}
// Check that there is a 0 arg constructor
bean.getConstructor(new Class[]{});
// At compile time, we have determined that the bean class
// exists, with a public zero constructor, new() can be
// used for bean instantiation.
generateNew = true;
} catch (Exception e) {
// Cannot instantiate the specified class, either a
// compilation error or a runtime error will be raised,
// depending on a compiler flag.
if (ctxt.getOptions().getErrorOnUseBeanInvalidClassAttribute()) {
err.jspError(n, "jsp.error.invalid.bean", klass);
}
if (canonicalName == null) {
// Doing our best here to get a canonical name
// from the binary name, should work 99.99% of time.
canonicalName = klass.replace('$','.');
}
}
if (type == null) {
// if type is unspecified, use "class" as type of bean
type = canonicalName;
}
}
String scopename = "PageContext.PAGE_SCOPE"; // Default to page
String lock = "_jspx_page_context";
if ("request".equals(scope)) {
scopename = "PageContext.REQUEST_SCOPE";
lock = "request";
} else if ("session".equals(scope)) {
scopename = "PageContext.SESSION_SCOPE";
lock = "session";
} else if ("application".equals(scope)) {
scopename = "PageContext.APPLICATION_SCOPE";
lock = "application";
}
n.setBeginJavaLine(out.getJavaLine());
// Declare bean
out.printin(type);
out.print(' ');
out.print(name);
out.println(" = null;");
/*
* Use synchonized block only if 'klass' or 'beanName' is defined.
* In all other cases, bean must be located in the given scope.
*/
// START S1AS 4642094
if (klass != null || beanName != null) {
// END S1AS 4642094
out.printin("synchronized (");
out.print(lock);
out.println(") {");
out.pushIndent();
// START S1AS 4642094
}
// END S1AS 4642094
// Locate bean from context
out.printin(name);
out.print(" = (");
out.print(type);
out.print(") _jspx_page_context.getAttribute(");
out.print(quote(name));
out.print(", ");
out.print(scopename);
out.println(");");
// Create bean
/*
* Check if bean is alredy there
*/
out.printin("if (");
out.print(name);
out.println(" == null){");
out.pushIndent();
if (klass == null && beanName == null) {
/*
* If both class name and beanName is not specified, the bean
* must be found locally, otherwise it's an error
*/
out.printin(
"throw new java.lang.InstantiationException(\"bean ");
out.print(name);
out.println(" not found within scope\");");
} else {
/*
* Instantiate the bean if it is not in the specified scope.
*/
if (!generateNew) {
String binaryName;
if (beanName != null) {
if (beanName.isNamedAttribute()) {
// If the value for beanName was specified via
// jsp:attribute, first generate code to evaluate
// that body.
binaryName =
generateNamedAttributeValue(
beanName.getNamedAttributeNode());
} else {
binaryName =
attributeValue(beanName, false, String.class);
}
} else {
// Implies klass is not null
binaryName = quote(klass);
}
out.printil("try {");
out.pushIndent();
out.printin(name);
out.print(" = (");
out.print(type);
out.print(") java.beans.Beans.instantiate(");
out.print("this.getClass().getClassLoader(), ");
out.print(binaryName);
out.println(");");
out.popIndent();
/*
* Note: Beans.instantiate throws ClassNotFoundException
* if the bean class is abstract.
*/
out.printil("} catch (ClassNotFoundException exc) {");
out.pushIndent();
out.printil(
"throw new InstantiationException(exc.getMessage());");
out.popIndent();
out.printil("} catch (Exception exc) {");
out.pushIndent();
out.printin("throw new ServletException(");
out.print("\"Cannot create bean of class \" + ");
out.print(binaryName);
out.println(", exc);");
out.popIndent();
out.printil("}"); // close of try
} else {
// Implies klass is not null
// Generate codes to instantiate the bean class
out.printin(name);
out.print(" = new ");
out.print(canonicalName);
out.println("();");
}
/*
* Set attribute for bean in the specified scope
*/
out.printin("_jspx_page_context.setAttribute(");
out.print(quote(name));
out.print(", ");
out.print(name);
out.print(", ");
out.print(scopename);
out.println(");");
// Only visit the body when bean is instantiated
visitBody(n);
}
out.popIndent();
out.printil("}");
// End of lock block
// START S1AS 4642094
if (klass != null || beanName != null) {
// END S1AS 4642094
out.popIndent();
out.printil("}");
// START S1AS 4642094
}
// END S1AS 4642094
n.setEndJavaLine(out.getJavaLine());
}
/**
* @return a string for the form 'attr = "value"'
*/
private String makeAttr(String attr, String value) {
if (value == null)
return "";
return " " + attr + "=\"" + value + '\"';
}
public void visit(Node.PlugIn n) throws JasperException {
/**
* A visitor to handle in a plugin
*/
class ParamVisitor extends Node.Visitor {
private boolean ie;
ParamVisitor(boolean ie) {
this.ie = ie;
}
public void visit(Node.ParamAction n) throws JasperException {
String name = n.getTextAttribute("name");
if (name.equalsIgnoreCase("object"))
name = "java_object";
else if (name.equalsIgnoreCase("type"))
name = "java_type";
n.setBeginJavaLine(out.getJavaLine());
// XXX - Fixed a bug here - value used to be output
// inline, which is only okay if value is not an EL
// expression. Also, key/value pairs for the
// embed tag were not being generated correctly.
// Double check that this is now the correct behavior.
if (ie) {
// We want something of the form
// out.println( "" );
out.printil(
"out.write( \"\" );");
out.printil("out.write(\"\\n\");");
} else {
// We want something of the form
// out.print( " blah=\"" + ... + "\"" );
out.printil(
"out.write( \" "
+ escape(name)
+ "=\\\"\" + "
+ attributeValue(
n.getValue(),
false,
String.class)
+ " + \"\\\"\" );");
}
n.setEndJavaLine(out.getJavaLine());
}
}
String type = n.getTextAttribute("type");
String code = n.getTextAttribute("code");
String name = n.getTextAttribute("name");
Node.JspAttribute height = n.getHeight();
Node.JspAttribute width = n.getWidth();
String hspace = n.getTextAttribute("hspace");
String vspace = n.getTextAttribute("vspace");
String align = n.getTextAttribute("align");
String iepluginurl = n.getTextAttribute("iepluginurl");
String nspluginurl = n.getTextAttribute("nspluginurl");
String codebase = n.getTextAttribute("codebase");
String archive = n.getTextAttribute("archive");
String jreversion = n.getTextAttribute("jreversion");
String widthStr = null;
if (width != null) {
if (width.isNamedAttribute()) {
widthStr =
generateNamedAttributeValue(
width.getNamedAttributeNode());
} else {
widthStr = attributeValue(width, false, String.class);
}
}
String heightStr = null;
if (height != null) {
if (height.isNamedAttribute()) {
heightStr =
generateNamedAttributeValue(
height.getNamedAttributeNode());
} else {
heightStr = attributeValue(height, false, String.class);
}
}
if (iepluginurl == null)
iepluginurl = Constants.IE_PLUGIN_URL;
if (nspluginurl == null)
nspluginurl = Constants.NS_PLUGIN_URL;
n.setBeginJavaLine(out.getJavaLine());
// If any of the params have their values specified by
// jsp:attribute, prepare those values first.
// Look for a params node and prepare its param subelements:
Node.JspBody jspBody = findJspBody(n);
if (jspBody != null) {
Node.Nodes subelements = jspBody.getBody();
if (subelements != null) {
for (int i = 0; i < subelements.size(); i++) {
Node m = subelements.getNode(i);
if (m instanceof Node.ParamsAction) {
prepareParams(m);
break;
}
}
}
}
// XXX - Fixed a bug here - width and height can be set
// dynamically. Double-check if this generation is correct.
// IE style plugin
// ") + ");");
out.printil("out.write(\"\\n\");");
n.setEndJavaLine(out.getJavaLine());
}
public void visit(Node.NamedAttribute n) throws JasperException {
// Don't visit body of this tag - we already did earlier.
}
public void visit(Node.CustomTag n) throws JasperException {
// Use plugin to generate more efficient code if there is one.
if (n.useTagPlugin()) {
generateTagPlugin(n);
return;
}
TagHandlerInfo handlerInfo = getTagHandlerInfo(n);
// Create variable names
String baseVar =
createTagVarName(n.getQName(), n.getPrefix(), n.getLocalName());
String tagEvalVar = "_jspx_eval_" + baseVar;
String tagHandlerVar = "_jspx_th_" + baseVar;
String tagPushBodyCountVar = "_jspx_push_body_count_" + baseVar;
// If the tag contains no scripting element, generate its codes
// to a method.
ServletWriter outSave = null;
Node.ChildInfo ci = n.getChildInfo();
if (ci.isScriptless() && !ci.hasScriptingVars()) {
// The tag handler and its body code can reside in a separate
// method if it is scriptless and does not have any scripting
// variable defined.
String tagMethod = "_jspx_meth_" + baseVar;
// Generate a call to this method
out.printin("if (");
out.print(tagMethod);
out.print("(");
if (parent != null) {
// START SJSAS 6388329
out.print("(javax.servlet.jsp.tagext.JspTag) ");
// END SJSAS 6388329
out.print(parent);
out.print(", ");
}
out.print("_jspx_page_context");
if (pushBodyCountVar != null) {
out.print(", ");
out.print(pushBodyCountVar);
}
out.println("))");
out.pushIndent();
out.printil((methodNesting > 0) ? "return true;" : "return;");
out.popIndent();
// Set up new buffer for the method
outSave = out;
/* For fragments, their bodies will be generated in fragment
helper classes, and the Java line adjustments will be done
there, hence they are set to null here to avoid double
adjustments.
*/
GenBuffer genBuffer =
new GenBuffer(n, n.implementsSimpleTag()? null: n.getBody());
methodsBuffered.add(genBuffer);
out = genBuffer.getOut();
methodNesting++;
// Generate code for method declaration
out.println();
out.pushIndent();
out.printin("private boolean ");
out.print(tagMethod);
out.print("(");
if (parent != null) {
out.print("javax.servlet.jsp.tagext.JspTag ");
out.print(parent);
out.print(", ");
}
out.print("PageContext _jspx_page_context");
if (pushBodyCountVar != null) {
out.print(", int[] ");
out.print(pushBodyCountVar);
}
out.println(")");
out.printil(" throws Throwable {");
out.pushIndent();
// Initilaize local variables used in this method.
if (! isTagFile) {
out.printil("PageContext pageContext = _jspx_page_context;");
}
out.printil("JspWriter out = _jspx_page_context.getOut();");
generateLocalVariables(out, n, genBytes);
}
if (n.implementsSimpleTag()) {
generateCustomDoTag(n, handlerInfo, tagHandlerVar);
} else {
/*
* Classic tag handler: Generate code for start element, body,
* and end element
*/
boolean genBytesSave = genBytes;
generateCustomStart(
n,
handlerInfo,
tagHandlerVar,
tagEvalVar,
tagPushBodyCountVar);
// visit body
String tmpParent = parent;
parent = tagHandlerVar;
boolean isSimpleTagParentSave = isSimpleTagParent;
isSimpleTagParent = false;
String tmpPushBodyCountVar = null;
if (n.implementsTryCatchFinally()) {
tmpPushBodyCountVar = pushBodyCountVar;
pushBodyCountVar = tagPushBodyCountVar;
}
boolean tmpIsSimpleTagHandler = isSimpleTagHandler;
isSimpleTagHandler = false;
visitBody(n);
parent = tmpParent;
isSimpleTagParent = isSimpleTagParentSave;
if (n.implementsTryCatchFinally()) {
pushBodyCountVar = tmpPushBodyCountVar;
}
isSimpleTagHandler = tmpIsSimpleTagHandler;
generateCustomEnd(
n,
tagHandlerVar,
tagEvalVar,
tagPushBodyCountVar);
genBytes = genBytesSave;
}
if (ci.isScriptless() && !ci.hasScriptingVars()) {
// Generate end of method
if (methodNesting > 0) {
out.printil("return false;");
}
out.popIndent();
out.printil("}");
out.popIndent();
methodNesting--;
// restore previous writer
out = outSave;
}
}
private static final String SINGLE_QUOTE = "'";
private static final String DOUBLE_QUOTE = "\\\"";
public void visit(Node.UninterpretedTag n) throws JasperException {
n.setBeginJavaLine(out.getJavaLine());
/*
* Write begin tag
*/
out.printin("out.write(\"<");
out.print(n.getQName());
Attributes attrs = n.getNonTaglibXmlnsAttributes();
int attrsLen = (attrs == null) ? 0 : attrs.getLength();
for (int i = 0; i < attrsLen; i++) {
out.print(" ");
out.print(attrs.getQName(i));
out.print("=");
String quote = DOUBLE_QUOTE;
String value = attrs.getValue(i);
if (value.indexOf('"') != -1) {
quote = SINGLE_QUOTE;
}
out.print(quote);
out.print(value);
out.print(quote);
}
attrs = n.getAttributes();
attrsLen = (attrs == null) ? 0 : attrs.getLength();
Node.JspAttribute[] jspAttrs = n.getJspAttributes();
for (int i = 0; i < attrsLen; i++) {
out.print(" ");
out.print(attrs.getQName(i));
out.print("=");
if (jspAttrs[i].isELInterpreterInput()) {
out.print("\\\"\" + ");
out.print(attributeValue(jspAttrs[i], false, String.class));
out.print(" + \"\\\"");
} else {
String quote = DOUBLE_QUOTE;
String value = attrs.getValue(i);
if (value.indexOf('"') != -1) {
quote = SINGLE_QUOTE;
}
out.print(quote);
out.print(value);
out.print(quote);
}
}
if (n.getBody() != null) {
out.println(">\");");
// Visit tag body
visitBody(n);
/*
* Write end tag
*/
out.printin("out.write(\"\");");
} else {
// Needs a space before "/>" to fix 6334245
out.println(" />\");");
}
n.setEndJavaLine(out.getJavaLine());
}
public void visit(Node.JspElement n) throws JasperException {
n.setBeginJavaLine(out.getJavaLine());
// Compute attribute value string for XML-style and named
// attributes
HashMap map = new HashMap();
Node.JspAttribute[] attrs = n.getJspAttributes();
for (int i = 0; attrs != null && i < attrs.length; i++) {
String attrStr = null;
StringBuilder genStr = new StringBuilder(" + ");
boolean genCloseParen = false;
if (attrs[i].isNamedAttribute()) {
Node.NamedAttribute attributeNode =
attrs[i].getNamedAttributeNode();
Node.JspAttribute omit = attributeNode.getOmit();
if ((omit != null) && omit.isLiteral() &&
JspUtil.booleanValue(omit.getValue())) {
// if we know omit is true at compile time, skip
continue;
}
attrStr =
generateNamedAttributeValue(
attrs[i].getNamedAttributeNode());
if (omit != null && !omit.isLiteral()) {
// If omit is a literal, its value is known to be false
// else generate test for omit at runtime
genCloseParen = true;
genStr.append("(")
.append(attributeValue(omit,false,Boolean.class))
.append("? \"\": ");
}
} else {
attrStr = attributeValue(attrs[i], false, Object.class);
}
genStr.append("\" ")
.append(attrs[i].getName())
.append("=\\\"\" + ")
.append(attrStr)
.append(" + \"\\\"\"");
if (genCloseParen)
genStr.append(")");
map.put(attrs[i].getName(), genStr.toString());
}
// Write begin tag, using XML-style 'name' attribute as the
// element name
String elemName =
attributeValue(n.getNameAttribute(), false, String.class);
out.printin("out.write(\"<\"");
out.print(" + " + elemName);
// Write remaining attributes
for (String attrName: map.keySet()) {
out.print(map.get(attrName));
}
// Does the have nested tags other than
//
boolean hasBody = false;
Node.Nodes subelements = n.getBody();
if (subelements != null) {
for (int i = 0; i < subelements.size(); i++) {
Node subelem = subelements.getNode(i);
if (!(subelem instanceof Node.NamedAttribute)) {
hasBody = true;
break;
}
}
}
if (hasBody) {
out.println(" + \">\");");
// Visit tag body
visitBody(n);
// Write end tag
out.printin("out.write(\"\");");
} else {
out.println(" + \"/>\");");
}
n.setEndJavaLine(out.getJavaLine());
}
public void visit(Node.TemplateText n) throws JasperException {
String text = n.getText();
int textSize = text.length();
if (textSize == 0) {
return;
}
if (textSize < 3) {
// Special case small text strings
n.setBeginJavaLine(out.getJavaLine());
int lineInc = 0;
for (int i = 0; i < textSize; i++) {
char ch = text.charAt(i);
out.printil("out.write(" + quote(ch) + ");");
if (i > 0) {
n.addSmap(lineInc);
}
if (ch == '\n') {
lineInc++;
}
}
n.setEndJavaLine(out.getJavaLine());
return;
}
if (genBytes || ctxt.getOptions().genStringAsCharArray()) {
// Generate Strings as byte or char arrays, for performance
n.setBeginJavaLine(out.getJavaLine());
ServletWriter aOut;
if (arrayBuffer == null) {
arrayBuffer = new GenBuffer();
aOut = arrayBuffer.getOut();
aOut.pushIndent();
textMap = new HashMap();
} else {
aOut = arrayBuffer.getOut();
}
String arrayName = textMap.get(text);
if (arrayName == null) {
arrayName = "_jspx_array_" + arrayCount++;
textMap.put(text, arrayName);
if (genBytes) {
// First output the String itself
aOut.printin("private final static String ");
aOut.print(arrayName);
aOut.print("S = ");
aOut.print(quote(text));
aOut.println(";");
// Then output the bytes for the String
aOut.printin("private final static byte[] ");
aOut.print(arrayName);
aOut.print(" = _jspx_getBytes(");
aOut.print(arrayName);
aOut.println("S);");
} else {
aOut.printin("private final static char[] ");
aOut.print(arrayName);
aOut.print(" = ");
aOut.print(quote(text));
aOut.println(".toCharArray();");
}
}
if (genBytes) {
out.printin("((org.apache.jasper.runtime.JspWriterImpl)out).write(_jspx_same_encoding(response.getCharacterEncoding()), ");
out.print(arrayName);
out.print(", ");
out.print(arrayName);
out.println("S);");
} else {
out.printil("out.write(" + arrayName + ");");
}
n.setEndJavaLine(out.getJavaLine());
return;
}
n.setBeginJavaLine(out.getJavaLine());
out.printin();
StringBuilder sb = new StringBuilder("out.write(\"");
int initLength = sb.length();
int count = JspUtil.CHUNKSIZE;
int srcLine = 0; // relative to starting srouce line
for (int i = 0; i < text.length(); i++) {
char ch = text.charAt(i);
--count;
switch (ch) {
case '"' :
sb.append('\\').append('\"');
break;
case '\\' :
sb.append('\\').append('\\');
break;
case '\r' :
sb.append('\\').append('r');
break;
case '\n' :
sb.append('\\').append('n');
srcLine++;
if (breakAtLF || count < 0) {
// Generate an out.write() when see a '\n' in template
sb.append("\");");
out.println(sb.toString());
if (i < text.length() - 1) {
out.printin();
}
sb.setLength(initLength);
count = JspUtil.CHUNKSIZE;
}
// add a Smap for this line
n.addSmap(srcLine);
break;
case '\t' : // Not sure we need this
sb.append('\\').append('t');
break;
case '$':
// The fact that we get a ${} means that the original
// EL was escaped with a '\\' (otherwise it would be
// parsed as a ELExpression node). If ELIgnored is
// true, '\\' must be preserved.
if (pageInfo.isELIgnored()
&& (i+1 < text.length())
&& (text.charAt(i+1) == '{')){
sb.append('\\').append('\\');
}
sb.append(ch);
break;
case '#':
boolean unescapePound = false;
if (isTagFile) {
String verS = ctxt.getTagInfo().
getTagLibrary().getRequiredVersion();
Double version = Double.valueOf(verS).doubleValue();
if (version < 2.1) {
unescapePound = true;
}
}
unescapePound = unescapePound || pageInfo.isELIgnored()
|| pageInfo.isDeferredSyntaxAllowedAsLiteral();
if (unescapePound
&& (i+1 < text.length())
&& (text.charAt(i+1) == '{')){
sb.append('\\').append('\\');
}
sb.append(ch);
break;
default :
sb.append(ch);
}
}
if (sb.length() > initLength) {
sb.append("\");");
out.println(sb.toString());
}
n.setEndJavaLine(out.getJavaLine());
}
public void visit(Node.JspBody n) throws JasperException {
if (n.getBody() != null) {
if (isSimpleTagHandler) {
out.printin(simpleTagHandlerVar);
out.print(".setJspBody(");
generateJspFragment(n, simpleTagHandlerVar);
out.println(");");
} else {
visitBody(n);
}
}
}
public void visit(Node.InvokeAction n) throws JasperException {
n.setBeginJavaLine(out.getJavaLine());
// Copy virtual page scope of tag file to page scope of invoking
// page
out.printil(
"((org.apache.jasper.runtime.JspContextWrapper) this.jspContext).syncBeforeInvoke();");
String varReaderAttr = n.getTextAttribute("varReader");
String varAttr = n.getTextAttribute("var");
if (varReaderAttr != null || varAttr != null) {
out.printil("_jspx_sout = new java.io.StringWriter();");
} else {
out.printil("_jspx_sout = null;");
}
// Invoke fragment, unless fragment is null
out.printin("if (");
out.print(toGetterMethod(n.getTextAttribute("fragment")));
out.println(" != null) {");
out.pushIndent();
out.printin(toGetterMethod(n.getTextAttribute("fragment")));
out.println(".invoke(_jspx_sout);");
out.popIndent();
out.printil("}");
// Store varReader in appropriate scope
if (varReaderAttr != null || varAttr != null) {
String scopeName = n.getTextAttribute("scope");
out.printin("_jspx_page_context.setAttribute(");
if (varReaderAttr != null) {
out.print(quote(varReaderAttr));
out.print(
", new java.io.StringReader(_jspx_sout.toString())");
} else {
out.print(quote(varAttr));
out.print(", _jspx_sout.toString()");
}
if (scopeName != null) {
out.print(", ");
out.print(getScopeConstant(scopeName));
}
out.println(");");
}
n.setEndJavaLine(out.getJavaLine());
}
public void visit(Node.DoBodyAction n) throws JasperException {
n.setBeginJavaLine(out.getJavaLine());
// Copy virtual page scope of tag file to page scope of invoking
// page
out.printil(
"((org.apache.jasper.runtime.JspContextWrapper) this.jspContext).syncBeforeInvoke();");
// Invoke body
String varReaderAttr = n.getTextAttribute("varReader");
String varAttr = n.getTextAttribute("var");
if (varReaderAttr != null || varAttr != null) {
out.printil("_jspx_sout = new java.io.StringWriter();");
} else {
out.printil("_jspx_sout = null;");
}
out.printil("if (getJspBody() != null)");
out.pushIndent();
out.printil("getJspBody().invoke(_jspx_sout);");
out.popIndent();
// Store varReader in appropriate scope
if (varReaderAttr != null || varAttr != null) {
String scopeName = n.getTextAttribute("scope");
out.printin("_jspx_page_context.setAttribute(");
if (varReaderAttr != null) {
out.print(quote(varReaderAttr));
out.print(
", new java.io.StringReader(_jspx_sout.toString())");
} else {
out.print(quote(varAttr));
out.print(", _jspx_sout.toString()");
}
if (scopeName != null) {
out.print(", ");
out.print(getScopeConstant(scopeName));
}
out.println(");");
}
n.setEndJavaLine(out.getJavaLine());
}
public void visit(Node.AttributeGenerator n) throws JasperException {
Node.CustomTag tag = n.getTag();
Node.JspAttribute[] attrs = tag.getJspAttributes();
for (int i = 0; attrs != null && i < attrs.length; i++) {
if (attrs[i].getName().equals(n.getName())) {
out.print(
evaluateAttribute(
getTagHandlerInfo(tag),
attrs[i],
tag,
null));
break;
}
}
}
private TagHandlerInfo getTagHandlerInfo(Node.CustomTag n)
throws JasperException {
HashMap handlerInfosByShortName =
handlerInfos.get(n.getPrefix());
if (handlerInfosByShortName == null) {
handlerInfosByShortName = new HashMap();
handlerInfos.put(n.getPrefix(), handlerInfosByShortName);
}
TagHandlerInfo handlerInfo =
handlerInfosByShortName.get(n.getLocalName());
if (handlerInfo == null) {
handlerInfo =
new TagHandlerInfo(n, n.getTagHandlerClass(), err);
handlerInfosByShortName.put(n.getLocalName(), handlerInfo);
}
return handlerInfo;
}
private void generateTagPlugin(Node.CustomTag n)
throws JasperException {
if (n.getAtSTag() != null) {
n.getAtSTag().visit(this);
}
visitBody(n);
if (n.getAtETag() != null) {
n.getAtETag().visit(this);
}
}
private void generateCustomStart(
Node.CustomTag n,
TagHandlerInfo handlerInfo,
String tagHandlerVar,
String tagEvalVar,
String tagPushBodyCountVar)
throws JasperException {
Class tagHandlerClass = handlerInfo.getTagHandlerClass();
out.printin("// ");
out.println(n.getQName());
n.setBeginJavaLine(out.getJavaLine());
// Declare AT_BEGIN scripting variables
declareScriptingVars(n, VariableInfo.AT_BEGIN);
saveScriptingVars(n, VariableInfo.AT_BEGIN);
String tagHandlerClassName =
JspUtil.getCanonicalName(tagHandlerClass);
out.printin(tagHandlerClassName);
out.print(" ");
out.print(tagHandlerVar);
out.print(" = ");
if (isPoolingEnabled &&
!JspIdConsumer.class.isAssignableFrom(tagHandlerClass)) {
out.print("(");
out.print(tagHandlerClassName);
out.print(") ");
out.print(n.getTagHandlerPoolName());
out.print(".get(");
out.print(tagHandlerClassName);
out.println(".class);");
} else {
out.print("(_jspx_resourceInjector != null) ? ");
out.print("_jspx_resourceInjector.createTagHandlerInstance(");
out.print(tagHandlerClassName);
out.print(".class) : new ");
out.print(tagHandlerClassName);
out.println("();");
}
generateSetters(n, tagHandlerVar, handlerInfo, false);
if (n.implementsTryCatchFinally()) {
out.printin("int[] ");
out.print(tagPushBodyCountVar);
out.println(" = new int[] { 0 };");
out.printil("try {");
out.pushIndent();
}
out.printin("int ");
out.print(tagEvalVar);
out.print(" = ");
out.print(tagHandlerVar);
out.println(".doStartTag();");
if (!n.implementsBodyTag()) {
// Synchronize AT_BEGIN scripting variables
syncScriptingVars(n, VariableInfo.AT_BEGIN);
}
if (!n.hasEmptyBody()) {
out.printin("if (");
out.print(tagEvalVar);
out.println(" != javax.servlet.jsp.tagext.Tag.SKIP_BODY) {");
out.pushIndent();
// Declare NESTED scripting variables
declareScriptingVars(n, VariableInfo.NESTED);
saveScriptingVars(n, VariableInfo.NESTED);
if (n.implementsBodyTag()) {
out.printin("if (");
out.print(tagEvalVar);
out.println(
" != javax.servlet.jsp.tagext.Tag.EVAL_BODY_INCLUDE) {");
// Assume EVAL_BODY_BUFFERED
genBytes = false; // Can't handle bytes in a body content
out.pushIndent();
out.printil("out = _jspx_page_context.pushBody();");
if (n.implementsTryCatchFinally()) {
out.printin(tagPushBodyCountVar);
out.println("[0]++;");
} else if (pushBodyCountVar != null) {
out.printin(pushBodyCountVar);
out.println("[0]++;");
}
out.printin(tagHandlerVar);
out.println(
".setBodyContent((javax.servlet.jsp.tagext.BodyContent) out);");
out.printin(tagHandlerVar);
out.println(".doInitBody();");
out.popIndent();
out.printil("}");
// Synchronize AT_BEGIN and NESTED scripting variables
syncScriptingVars(n, VariableInfo.AT_BEGIN);
syncScriptingVars(n, VariableInfo.NESTED);
} else {
// Synchronize NESTED scripting variables
syncScriptingVars(n, VariableInfo.NESTED);
}
if (n.implementsIterationTag()) {
out.printil("do {");
out.pushIndent();
}
}
// Map the Java lines that handles start of custom tags to the
// JSP line for this tag
n.setEndJavaLine(out.getJavaLine());
}
private void generateCustomEnd(
Node.CustomTag n,
String tagHandlerVar,
String tagEvalVar,
String tagPushBodyCountVar) {
if (!n.hasEmptyBody()) {
if (n.implementsIterationTag()) {
out.printin("int evalDoAfterBody = ");
out.print(tagHandlerVar);
out.println(".doAfterBody();");
// Synchronize AT_BEGIN and NESTED scripting variables
syncScriptingVars(n, VariableInfo.AT_BEGIN);
syncScriptingVars(n, VariableInfo.NESTED);
out.printil(
"if (evalDoAfterBody != javax.servlet.jsp.tagext.BodyTag.EVAL_BODY_AGAIN)");
out.pushIndent();
out.printil("break;");
out.popIndent();
out.popIndent();
out.printil("} while (true);");
}
restoreScriptingVars(n, VariableInfo.NESTED);
if (n.implementsBodyTag()) {
out.printin("if (");
out.print(tagEvalVar);
out.println(
" != javax.servlet.jsp.tagext.Tag.EVAL_BODY_INCLUDE)");
out.pushIndent();
out.printil("out = _jspx_page_context.popBody();");
if (n.implementsTryCatchFinally()) {
out.printin(tagPushBodyCountVar);
out.println("[0]--;");
} else if (pushBodyCountVar != null) {
out.printin(pushBodyCountVar);
out.println("[0]--;");
}
out.popIndent();
}
out.popIndent(); // EVAL_BODY
out.printil("}");
}
out.printin("if (");
out.print(tagHandlerVar);
out.println(
".doEndTag() == javax.servlet.jsp.tagext.Tag.SKIP_PAGE) {");
out.pushIndent();
if (!n.implementsTryCatchFinally()) {
if (isPoolingEnabled) {
out.printin(n.getTagHandlerPoolName());
out.print(".reuse(");
out.print(tagHandlerVar);
out.println(");");
} else {
out.printin(tagHandlerVar);
out.println(".release();");
}
}
if (isTagFile || isFragment) {
out.printil("throw new SkipPageException();");
} else {
out.printil((methodNesting > 0) ? "return true;" : "return;");
}
out.popIndent();
out.printil("}");
// Synchronize AT_BEGIN scripting variables
syncScriptingVars(n, VariableInfo.AT_BEGIN);
// TryCatchFinally
if (n.implementsTryCatchFinally()) {
out.popIndent(); // try
out.printil("} catch (Throwable _jspx_exception) {");
out.pushIndent();
out.printin("while (");
out.print(tagPushBodyCountVar);
out.println("[0]-- > 0)");
out.pushIndent();
out.printil("out = _jspx_page_context.popBody();");
out.popIndent();
out.printin(tagHandlerVar);
out.println(".doCatch(_jspx_exception);");
out.popIndent();
out.printil("} finally {");
out.pushIndent();
out.printin(tagHandlerVar);
out.println(".doFinally();");
}
if (isPoolingEnabled) {
out.printin(n.getTagHandlerPoolName());
out.print(".reuse(");
out.print(tagHandlerVar);
out.println(");");
} else {
out.printin(tagHandlerVar);
out.println(".release();");
}
if (n.implementsTryCatchFinally()) {
out.popIndent();
out.printil("}");
}
// Declare and synchronize AT_END scripting variables (must do this
// outside the try/catch/finally block)
declareScriptingVars(n, VariableInfo.AT_END);
syncScriptingVars(n, VariableInfo.AT_END);
restoreScriptingVars(n, VariableInfo.AT_BEGIN);
}
private void generateCustomDoTag(
Node.CustomTag n,
TagHandlerInfo handlerInfo,
String tagHandlerVar)
throws JasperException {
Class tagHandlerClass = handlerInfo.getTagHandlerClass();
n.setBeginJavaLine(out.getJavaLine());
out.printin("// ");
out.println(n.getQName());
// Declare AT_BEGIN scripting variables
declareScriptingVars(n, VariableInfo.AT_BEGIN);
saveScriptingVars(n, VariableInfo.AT_BEGIN);
String tagHandlerClassName =
JspUtil.getCanonicalName(tagHandlerClass);
out.printin(tagHandlerClassName);
out.print(" ");
out.print(tagHandlerVar);
out.print(" = ");
out.print("(_jspx_resourceInjector != null) ? ");
out.print("_jspx_resourceInjector.createTagHandlerInstance(");
out.print(tagHandlerClassName);
out.print(".class) : new ");
out.print(tagHandlerClassName);
out.println("();");
generateSetters(n, tagHandlerVar, handlerInfo, true);
// Set the body
if (findJspBody(n) == null) {
/*
* Encapsulate body of custom tag invocation in JspFragment
* and pass it to tag handler's setJspBody(), unless tag body
* is empty
*/
if (!n.hasEmptyBody()) {
out.printin(tagHandlerVar);
out.print(".setJspBody(");
generateJspFragment(n, tagHandlerVar);
out.println(");");
}
} else {
/*
* Body of tag is the body of the element.
* The visit method for that element is going to encapsulate
* that element's body in a JspFragment and pass it to
* the tag handler's setJspBody()
*/
String tmpTagHandlerVar = simpleTagHandlerVar;
simpleTagHandlerVar = tagHandlerVar;
boolean tmpIsSimpleTagHandler = isSimpleTagHandler;
isSimpleTagHandler = true;
visitBody(n);
simpleTagHandlerVar = tmpTagHandlerVar;
isSimpleTagHandler = tmpIsSimpleTagHandler;
}
out.printin(tagHandlerVar);
out.println(".doTag();");
restoreScriptingVars(n, VariableInfo.AT_BEGIN);
// Synchronize AT_BEGIN scripting variables
syncScriptingVars(n, VariableInfo.AT_BEGIN);
// Declare and synchronize AT_END scripting variables
declareScriptingVars(n, VariableInfo.AT_END);
syncScriptingVars(n, VariableInfo.AT_END);
n.setEndJavaLine(out.getJavaLine());
}
private void declareScriptingVars(Node.CustomTag n, int scope) {
// Skip if the page is scriptless
if (pageInfo.isScriptless()) return;
ArrayList