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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=13597 ClassCastException in <jsp:setProperty if editor class set in BeanInfo Summary: ClassCastException in <jsp:setProperty if editor class set in BeanInfo Product: Tomcat 4 Version: 4.0.1 Final Platform: PC OS/Version: Windows NT/2K Status: NEW Severity: Minor Priority: Other Component: Jasper AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] description : FULL PRODUCT VERSION : java version "1.4.1" Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-b21) Java HotSpot(TM) Client VM (build 1.4.1-b21, mixed mode) Java 2 Enterprise Edition version 1.3.1, build 1.3.1-b17 FULL OPERATING SYSTEM VERSION : Microsoft Windows 2000 [Version 5.00.2195] EXTRA RELEVANT SYSTEM CONFIGURATION : Apache Tomcat/4.0.1 Sun ONE Studio 4.0 update 1 A DESCRIPTION OF THE PROBLEM : When an editor class is set to the property in the BeanInfo, the jsp tag setProperty throw a ClassCastException. STEPS TO FOLLOW TO REPRODUCE THE PROBLEM : 1. execute the given web application 2. Go to URL http://localhost:8081/webapp/login.jsp 3. type the username toto 4. type enter. 5. you should see the exception EXPECTED VERSUS ACTUAL BEHAVIOR : Expected result: Welcome toto Actual Result: ClassCastException ERROR MESSAGES/STACK TRACES THAT OCCUR : root cause org.apache.jasper.JasperException: Unable to convert string 'toto' to class java.lang.String for attribute username: java.lang.ClassCastException at org.apache.jasper.runtime.JspRuntimeLibrary.convert (JspRuntimeLibrary.java:184) at org.apache.jasper.runtime.JspRuntimeLibrary.internalIntrospecthelper (JspRuntimeLibrary.java:267) at org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper (JspRuntimeLibrary.java:219) at org.apache.jsp.welcome$jsp._jspService(welcome$jsp.java:105) REPRODUCIBILITY : This bug can be reproduced always. ---------- BEGIN SOURCE ---------- File LoginBean.java =================== public class LoginBean { private String username = ""; public void setUsername(String username) {this.username = username;} public String getUsername() {return username;} } File LoginBeanBeanInfo.java =================== import java.beans.*; import java.io.*; public class LoginBeanBeanInfo extends SimpleBeanInfo { private Class beanClass = LoginBean.class; public LoginBeanBeanInfo() { } public PropertyDescriptor[] getPropertyDescriptors() { try { PropertyDescriptor _username = new PropertyDescriptor("username", beanClass, "getUsername", "setUsername"); _username.setDisplayName("username"); _username.setShortDescription("username"); _username.setPropertyEditorClass(javax.swing.JTextField.class); PropertyDescriptor[] pds = new PropertyDescriptor[] {_username}; return pds; } catch(IntrospectionException ex) { ex.printStackTrace(); return null; } } } File login.jsp =================== <html> <head> <title>login</title> </head> <jsp:useBean id="loginBeanId" scope="session" class="LoginBean" /> <body> <h1>Login Page</h1> <form method="post" action=<%= request.getContextPath()+"/welcome.jsp"%> <br>Username : <input name="username"><br> <input type="submit" name="Submit" value="OK"> <input type="reset" value="Reset"> </form> </body> </html> File welcome.jsp =================== <%@page import="LoginBean"%> <html> <head><title>Welcome Page</title></head> <body> <jsp:useBean id="loginBeanId" scope="session" class="LoginBean" /> <jsp:setProperty name="loginBeanId" property="username" /> Welcome <jsp:getProperty name="loginBeanId" property="username" /> </body> </html> ---------- END SOURCE ---------- CUSTOMER WORKAROUND : replace the line <jsp:setProperty name="loginBeanId" property="username" /> by <% String s = request.getParameter("username"); loginBeanId.setUsername(s); %> -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
