https://issues.apache.org/bugzilla/show_bug.cgi?id=56797
Bug ID: 56797
Summary: EL-API does not find overriden method
Product: Tomcat 7
Version: 7.0.55
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P2
Component: Jasper
Assignee: dev@tomcat.apache.org
Reporter: da...@gmx.de
Util.findWrapper(..) returns with a MethodNotFoundException
(util.method.ambiguous) under the following conditions:
- A method is overriden and the return type in the overriden method is
inherited from the original method's return type
- The method is called with a parameter whose type is inherited from the
declared type (assignable)
Apparently, this leads to a situation with multiple matches.
If only one of those conditions is true, the error does not occur.
Example:
--------
TesterBeanA.java:
public CharSequence getCharSequence(CharSequence cs) {
return cs;
}
TesterBeanAA.java
@Override
public String getCharSequence(CharSequence cs) {
return cs.toString();
}
Test Case:
----------
TestMethodExpressionImpl.java:
@Test
public void testInvokeOverridenParamAndReturnType() {
MethodExpression me = factory.createMethodExpression(context,
"${beanAA.getCharSequence('test')}", null ,
new Class<?>[] { TesterBeanB.class });
assertEquals("test", me.invoke(context, null));
}
Note 1: The error also occurs if getCharSequence(..) in TesterBeanA is
abstract.
I suggest adding a check for isAbstract() upon reading method modifiers and
drop abstract method right away.
Note 2: This worked in Tomcat 7.0.40.
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