[BEANUTILS-157] Beanutils's describe() method cannot determine reader methods for anonymous class

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.6.1
• Fix Version/s: 1.8.0
• Component/s: Bean / Property Utils

Environment

Operating System: Windows XP
Platform: PC

• Bugzilla Id: 33461
• Assignee: Niall Pemberton
• Reporter: Thorbjørn Ravn Andersen
• Created: 09/Feb/05 19:38
• Updated: 02/May/13 02:29
• Resolved: 11/Jul/07 05:45

Description

I have the following snippet in a JSP-page which uses BeanUtils 1.6.1 and I get
an exception.

Code snippet (the anonymous class is to get a JavaBean defined in the JSP-page):
—
List l = new ArrayList();
for(int i = 1; i < 10; i++) {
final int i2 = i;
Object o = new Serializable() {
String x = "" + i2;
String y = "" + (100+i2) ;
public String getX()

{ return x; }

public String getY()

{ return y; }

public String toString()

{ return getX() + " " + getY(); }

};
l.add(o);
Map map = BeanUtils.describe(o);
—
which gives me the following exception:
—

javax.servlet.ServletException: Property 'y' has no getter method
at
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
at
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
at org.apache.jsp.main_jsp._jspService(main_jsp.java:257)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:704)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:474)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:409)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312)
at com.transaxiom.axsWHSweb.servlet.GetCurrentStock.doPost(GetCurrentStock.java:31)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)
—
for what I can see it is the PropertyDescriptor.getReadMethod0 which does not
treat WeakReferences correctly. The passed property descriptor looks like:
—
this= PropertyDescriptor (id=2658)
baseName= null
bound= false
classRef= WeakReference (id=2662)
constrained= false
displayName= null
expert= false
hidden= false
name= "y"
preferred= false
propertyEditorClassRef= null
propertyTypeRef= WeakReference (id=2664)
readMethodName= "getY"
readMethodRef= SoftReference (id=2666)
shortDescription= null
table= null
writeMethodName= null
writeMethodRef= null
–
but now it is more complex than I can understand. Any suggestions?

Issue Links

• depends upon: BEANUTILS-273 Public methods overriden in anonymous or private subclasses are not recognized by PropertyUtils