org.apache.jasper.runtime.JspRuntimeLibrary Maven / Gradle / Ivy
/*
* Copyright 1999,2004 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.runtime;
import java.io.IOException;
import java.util.Enumeration;
import java.lang.reflect.Method;
import java.beans.PropertyEditor;
import java.beans.PropertyEditorManager;
import java.security.AccessController;
import java.security.PrivilegedExceptionAction;
import java.security.PrivilegedActionException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.BodyContent;
import org.apache.jasper.JasperException;
import org.apache.jasper.Constants;
/**
* Bunch of util methods that are used by code generated for useBean,
* getProperty and setProperty.
*
* The __begin, __end stuff is there so that the JSP engine can
* actually parse this file and inline them if people don't want
* runtime dependencies on this class. However, I'm not sure if that
* works so well right now. It got forgotten at some point. -akv
*
* @author Mandar Raje
*/
public class JspRuntimeLibrary {
protected static class PrivilegedIntrospectHelper
implements PrivilegedExceptionAction {
private Object bean;
private String prop;
private String value;
private ServletRequest request;
private String param;
private boolean ignoreMethodNF;
PrivilegedIntrospectHelper(Object bean, String prop,
String value, ServletRequest request,
String param, boolean ignoreMethodNF)
{
this.bean = bean;
this.prop = prop;
this.value = value;
this.request = request;
this.param = param;
this.ignoreMethodNF = ignoreMethodNF;
}
public Object run() throws JasperException {
internalIntrospecthelper(
bean,prop,value,request,param,ignoreMethodNF);
return null;
}
}
// __begin convertMethod
public static Object convert(String propertyName, String s, Class t, Class propertyEditorClass)
throws JasperException
{
try {
if (s == null) {
if (t.equals(Boolean.class) || t.equals(Boolean.TYPE))
s = "false";
else
return null;
}
if (propertyEditorClass != null) {
return getValueFromBeanInfoPropertyEditor(
t, propertyName, s, propertyEditorClass);
} else if ( t.equals(Boolean.class) || t.equals(Boolean.TYPE) ) {
if (s.equalsIgnoreCase("on") || s.equalsIgnoreCase("true"))
s = "true";
else
s = "false";
return new Boolean(s);
} else if ( t.equals(Byte.class) || t.equals(Byte.TYPE) ) {
return new Byte(s);
} else if (t.equals(Character.class) || t.equals(Character.TYPE)) {
return s.length() > 0 ? new Character(s.charAt(0)) : null;
} else if ( t.equals(Short.class) || t.equals(Short.TYPE) ) {
return new Short(s);
} else if ( t.equals(Integer.class) || t.equals(Integer.TYPE) ) {
return new Integer(s);
} else if ( t.equals(Float.class) || t.equals(Float.TYPE) ) {
return new Float(s);
} else if ( t.equals(Long.class) || t.equals(Long.TYPE) ) {
return new Long(s);
} else if ( t.equals(Double.class) || t.equals(Double.TYPE) ) {
return new Double(s);
} else if ( t.equals(String.class) ) {
return s;
} else if ( t.equals(java.io.File.class) ) {
return new java.io.File(s);
} else if (t.getName().equals("java.lang.Object")) {
return new Object[] {s};
} else {
return getValueFromPropertyEditorManager(
t, propertyName, s);
}
} catch (Exception ex) {
throw new JasperException (ex);
}
}
// __end convertMethod
// __begin introspectMethod
public static void introspect(Object bean, ServletRequest request)
throws JasperException
{
Enumeration e = request.getParameterNames();
while ( e.hasMoreElements() ) {
String name = (String) e.nextElement();
String value = request.getParameter(name);
introspecthelper(bean, name, value, request, name, true);
}
}
// __end introspectMethod
// __begin introspecthelperMethod
public static void introspecthelper(Object bean, String prop,
String value, ServletRequest request,
String param, boolean ignoreMethodNF)
throws JasperException
{
if( System.getSecurityManager() != null ) {
try {
PrivilegedIntrospectHelper dp =
new PrivilegedIntrospectHelper(
bean,prop,value,request,param,ignoreMethodNF);
AccessController.doPrivileged(dp);
} catch( PrivilegedActionException pe) {
Exception e = pe.getException();
throw (JasperException)e;
}
} else {
internalIntrospecthelper(
bean,prop,value,request,param,ignoreMethodNF);
}
}
private static void internalIntrospecthelper(Object bean, String prop,
String value, ServletRequest request,
String param, boolean ignoreMethodNF)
throws JasperException
{
java.lang.reflect.Method method = null;
Class type = null;
Class propertyEditorClass = null;
try {
java.beans.BeanInfo info
= java.beans.Introspector.getBeanInfo(bean.getClass());
if ( info != null ) {
java.beans.PropertyDescriptor pd[]
= info.getPropertyDescriptors();
for (int i = 0 ; i < pd.length ; i++) {
if ( pd[i].getName().equals(prop) ) {
method = pd[i].getWriteMethod();
type = pd[i].getPropertyType();
propertyEditorClass = pd[i].getPropertyEditorClass();
break;
}
}
}
if ( method != null ) {
if (type.isArray()) {
if (request == null) {
throw new JasperException(Constants.getString(
"jsp.error.beans.setproperty.noindexset",
new Object[] {}));
};
Class t = type.getComponentType();
String[] values = request.getParameterValues(param);
//XXX Please check.
if(values == null) return;
if(t.equals(String.class)) {
method.invoke(bean, new Object[] { values });
} else {
Object tmpval = null;
createTypedArray (prop, bean, method, values, t,
propertyEditorClass);
}
} else {
if(value == null || (param != null && value.equals(""))) return;
Object oval = convert(prop, value, type, propertyEditorClass);
if ( oval != null )
method.invoke(bean, new Object[] { oval });
}
}
} catch (Exception ex) {
throw new JasperException (ex);
}
if (!ignoreMethodNF && (method == null)) {
if (type == null) {
throw new JasperException(Constants.getString(
"jsp.error.beans.noproperty",
new Object[] {prop, bean.getClass().getName()}));
} else {
throw new JasperException(Constants.getString(
"jsp.error.beans.nomethod.setproperty",
new Object[] {prop, type.getName(),
bean.getClass().getName()}));
}
}
}
// __end introspecthelperMethod
//-------------------------------------------------------------------
// functions to convert builtin Java data types to string.
//-------------------------------------------------------------------
// __begin toStringMethod
public static String toString(Object o) {
return String.valueOf(o);
}
public static String toString(byte b) {
return new Byte(b).toString();
}
public static String toString(boolean b) {
return new Boolean(b).toString();
}
public static String toString(short s) {
return new Short(s).toString();
}
public static String toString(int i) {
return new Integer(i).toString();
}
public static String toString(float f) {
return new Float(f).toString();
}
public static String toString(long l) {
return new Long(l).toString();
}
public static String toString(double d) {
return new Double(d).toString();
}
public static String toString(char c) {
return new Character(c).toString();
}
// __end toStringMethod
/**
* Create a typed array.
* This is a special case where params are passed through
* the request and the property is indexed.
*/
public static void createTypedArray(String propertyName,
Object bean, Method method, String []values, Class t,
Class propertyEditorClass)
throws JasperException {
try {
if (propertyEditorClass != null) {
Object[] tmpval = new Integer[values.length];
for (int i=0; i^()[]{}$\\\n";
for(int index=0; index= encoded.length())
count = encoded.length();
else
count += 2;
} else if (cur == '+') {
holdbuffer[bufcount++] = (byte) ' ';
} else {
holdbuffer[bufcount++] = (byte) cur;
}
}
// REVISIT -- remedy for Deprecated warning.
//return new String(holdbuffer,0,0,bufcount);
return new String(holdbuffer,0,bufcount);
}
// __begin lookupReadMethodMethod
public static Object handleGetProperty(Object o, String prop)
throws JasperException {
if (o == null) {
throw new JasperException(Constants.getString(
"jsp.error.beans.nullbean",
new Object[] {}));
}
Object value = null;
try {
java.lang.reflect.Method method =
getReadMethod(o.getClass(), prop);
value = method.invoke(o, null);
} catch (Exception ex) {
throw new JasperException (ex);
}
return value;
}
// __end lookupReadMethodMethod
public static void handleSetProperty(Object bean, String prop,
Object value)
throws JasperException
{
try {
Method method = getWriteMethod(bean.getClass(), prop);
method.invoke(bean, new Object[] { value });
} catch (Exception ex) {
throw new JasperException(ex);
}
}
public static void handleSetProperty(Object bean, String prop,
int value)
throws JasperException
{
try {
Method method = getWriteMethod(bean.getClass(), prop);
method.invoke(bean, new Object[] { new Integer(value) });
} catch (Exception ex) {
throw new JasperException(ex);
}
}
public static void handleSetProperty(Object bean, String prop,
short value)
throws JasperException
{
try {
Method method = getWriteMethod(bean.getClass(), prop);
method.invoke(bean, new Object[] { new Short(value) });
} catch (Exception ex) {
throw new JasperException(ex);
}
}
public static void handleSetProperty(Object bean, String prop,
long value)
throws JasperException
{
try {
Method method = getWriteMethod(bean.getClass(), prop);
method.invoke(bean, new Object[] { new Long(value) });
} catch (Exception ex) {
throw new JasperException(ex);
}
}
public static void handleSetProperty(Object bean, String prop,
double value)
throws JasperException
{
try {
Method method = getWriteMethod(bean.getClass(), prop);
method.invoke(bean, new Object[] { new Double(value) });
} catch (Exception ex) {
throw new JasperException(ex);
}
}
public static void handleSetProperty(Object bean, String prop,
float value)
throws JasperException
{
try {
Method method = getWriteMethod(bean.getClass(), prop);
method.invoke(bean, new Object[] { new Float(value) });
} catch (Exception ex) {
throw new JasperException(ex);
}
}
public static void handleSetProperty(Object bean, String prop,
char value)
throws JasperException
{
try {
Method method = getWriteMethod(bean.getClass(), prop);
method.invoke(bean, new Object[] { new Character(value) });
} catch (Exception ex) {
throw new JasperException(ex);
}
}
public static void handleSetProperty(Object bean, String prop,
byte value)
throws JasperException
{
try {
Method method = getWriteMethod(bean.getClass(), prop);
method.invoke(bean, new Object[] { new Byte(value) });
} catch (Exception ex) {
throw new JasperException(ex);
}
}
public static void handleSetProperty(Object bean, String prop,
boolean value)
throws JasperException
{
try {
Method method = getWriteMethod(bean.getClass(), prop);
method.invoke(bean, new Object[] { new Boolean(value) });
} catch (Exception ex) {
throw new JasperException(ex);
}
}
public static java.lang.reflect.Method getWriteMethod(Class beanClass, String prop)
throws JasperException {
java.lang.reflect.Method method = null;
Class type = null;
try {
java.beans.BeanInfo info
= java.beans.Introspector.getBeanInfo(beanClass);
if ( info != null ) {
java.beans.PropertyDescriptor pd[]
= info.getPropertyDescriptors();
for (int i = 0 ; i < pd.length ; i++) {
if ( pd[i].getName().equals(prop) ) {
method = pd[i].getWriteMethod();
type = pd[i].getPropertyType();
break;
}
}
} else {
// just in case introspection silently fails.
throw new JasperException(Constants.getString(
"jsp.error.beans.nobeaninfo",
new Object[] {beanClass.getName()}));
}
} catch (Exception ex) {
throw new JasperException (ex);
}
if (method == null) {
if (type == null) {
throw new JasperException(Constants.getString(
"jsp.error.beans.noproperty",
new Object[] {prop, beanClass.getName()}));
} else {
throw new JasperException(Constants.getString(
"jsp.error.beans.nomethod.setproperty",
new Object[] {prop, type.getName(),
beanClass.getName()}));
}
}
return method;
}
public static java.lang.reflect.Method getReadMethod(Class beanClass, String prop)
throws JasperException {
java.lang.reflect.Method method = null;
Class type = null;
try {
java.beans.BeanInfo info
= java.beans.Introspector.getBeanInfo(beanClass);
if ( info != null ) {
java.beans.PropertyDescriptor pd[]
= info.getPropertyDescriptors();
for (int i = 0 ; i < pd.length ; i++) {
if ( pd[i].getName().equals(prop) ) {
method = pd[i].getReadMethod();
type = pd[i].getPropertyType();
break;
}
}
} else {
// just in case introspection silently fails.
throw new JasperException(Constants.getString(
"jsp.error.beans.nobeaninfo",
new Object[] {beanClass.getName()}));
}
} catch (Exception ex) {
throw new JasperException (ex);
}
if (method == null) {
if (type == null) {
throw new JasperException(Constants.getString(
"jsp.error.beans.noproperty",
new Object[] {prop, beanClass.getName()}));
} else {
throw new JasperException(Constants.getString(
"jsp.error.beans.nomethod",
new Object[] {prop, beanClass.getName()}));
}
}
return method;
}
//*********************************************************************
// PropertyEditor Support
public static Object getValueFromBeanInfoPropertyEditor(
Class attrClass, String attrName, String attrValue,
Class propertyEditorClass)
throws JasperException
{
try {
PropertyEditor pe = (PropertyEditor)propertyEditorClass.newInstance();
pe.setAsText(attrValue);
return pe.getValue();
} catch (Exception ex) {
throw new JasperException(
"Unable to convert string '" + attrValue + "' to class " +
attrClass.getName() + " for attribute " + attrName +
": " + ex);
}
}
public static Object getValueFromPropertyEditorManager(
Class attrClass, String attrName, String attrValue)
throws JasperException
{
try {
PropertyEditor propEditor =
PropertyEditorManager.findEditor(attrClass);
if (propEditor != null) {
propEditor.setAsText(attrValue);
return propEditor.getValue();
} else {
throw new IllegalArgumentException("Property Editor not registered with the PropertyEditorManager");
}
} catch (IllegalArgumentException ex) {
throw new JasperException(
"Unable to convert string '" + attrValue + "' to class " +
attrClass.getName() + " for attribute " + attrName +
": " + ex);
}
}
// ************************************************************************
// General Purpose Runtime Methods
// ************************************************************************
/**
* Convert a possibly relative resource path into a context-relative
* resource path that starts with a '/'.
*
* @param request The servlet request we are processing
* @param relativePath The possibly relative resource path
*/
public static String getContextRelativePath(ServletRequest request,
String relativePath) {
if (relativePath.startsWith("/"))
return (relativePath);
if (!(request instanceof HttpServletRequest))
return (relativePath);
HttpServletRequest hrequest = (HttpServletRequest) request;
String uri = (String)
request.getAttribute("javax.servlet.include.servlet_path");
if (uri == null)
uri = hrequest.getServletPath();
return (uri.substring(0, uri.lastIndexOf('/')) + '/' + relativePath);
}
/**
* Perform a RequestDispatcher.include() operation, with optional flushing
* of the response beforehand.
*
* @param request The servlet request we are processing
* @param response The servlet response we are processing
* @param relativePath The relative path of the resource to be included
* @param out The JspWriter to whom we are currently writing
* @param flush Should we flush before the include is processed?
*
* @exception IOException if thrown by the included servlet
* @exception ServletException if thrown by the included servlet
*/
public static void include(HttpServletRequest request,
HttpServletResponse response,
String relativePath,
JspWriter out,
boolean flush)
throws IOException, ServletException {
if (flush && !(out instanceof BodyContent))
out.flush();
// FIXME - It is tempting to use request.getRequestDispatcher() to
// resolve a relative path directly, but Catalina currently does not
// take into account whether the caller is inside a RequestDispatcher
// include or not. Whether Catalina *should* take that into account
// is a spec issue currently under review. In the mean time,
// replicate Jasper's previous behavior
String resourcePath = getContextRelativePath(request, relativePath);
RequestDispatcher rd = request.getRequestDispatcher(resourcePath);
rd.include(request,
new ServletResponseWrapperInclude(response, out));
}
}
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