Antonis Theocharides created OLINGO-410:
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Summary: Function invocation with parameters using reflection
fails due to reordering of the parameter list when parsing the metadata
Key: OLINGO-410
URL: https://issues.apache.org/jira/browse/OLINGO-410
Project: Olingo
Issue Type: Bug
Components: odata2-core
Affects Versions: V2 2.0.0
Reporter: Antonis Theocharides
In order to call a function import method, reflection is used by getting the
parameter list from the metadata and calling the Class.getMethod(String name,
Class<?>... parameterTypes).
The problem occurs in EdmFunctionImportImplProv.
buildFunctionImportParametersInternal method where a hashtable is used to
temporarily store the parameter list and then retrieve them from the
EdmFunctionImportImplProv.getParameterNames function. Using a hashtable to
store them means that depending on the name of the parameter their order might
change when retrieved by an iterator. In result. When getParameterNames is
called and passed into the Class.getMethod method if the order of the
parameters is wrong an exception is thrown because the signature we are looking
for does not exist.
Proposed solution might be
@Override
public List<String> getParameterNames() throws EdmException {
if (parametersList == null) {
parametersList = new ArrayList<String>();
if(functionImport.getParameters() != null){
for (FunctionImportParameter functionImportParameter :
functionImport.getParameters()) {
parametersList.add(functionImportParameter.getName());
}
}
}
return parametersList;
}
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