Resolve full qualified type from compiler syntax tree

Question

I'm writting a program to perform some analysis on arbitrary Java source code and I need to be able to resolve types that are imported. This is relatively easy if the type is explicitly imported e.g.
import java.util.List;
List x = null;
then the type of x can be determined to be List.
However if wildcard imports are used e.g.
import java.util.*;
import java.io.*;
List x = nulll;
How can I determine what the type of x actually is? I'm using the java compiler API to parse the source code:
CompilationTask task = compiler.getTask(null, null, null, options, null, files);
JavacTask javacTask = (JavacTask) task;
Iterable<? extends CompilationUnitTree> tree = javacTask.parse();
and then scanning the CompilationUnitTree for items of interest.
I suspect I need to execute the analyze phase of the compiler but I can't see that the output of that phase is immediatly useful.
Thanks
Ian Clough

Answer 1

GardenAway wrote:
So, I suspect something did not get set properly when the existing app was imported from FB4 Beta to FB4 GA.
dp
I had the same null argument problem as you did. Thank you for the insight above. It saved me a load of time.
Here are some more details:
when I moved onto FB4GA from beta 2, the .actionScriptProperties file contained bunch entries like the following
<compiler>
   <modifiedEntries>
     <libraryPathEntry index="4" kind="3" linkType="4" path="${PROJECT_FR
            <crossDomainRsls>
              <crossDomainRslEntry autoExtract="true" policyFileUrl="" rslUrl=
              <crossDomainRslEntry autoExtract="true" policyFileUrl="http://fp
            </crossDomainRsls>
     </libraryPathEntry>
          about 3-4 more entries like the above
   </modifiedEntries>
   <libraryPathEntry kind="1" linkType="1" path="${FLEXUNIT_LIB_LOCATION}/
</compiler>
In eclipse, I went into project properties > Flex Build Path, deleted all the build path libraries/sdks and re-added only the SDK. The .actionScriptProperties file now has all the libraryPathEntries lines replaced with the following
    <libraryPath defaultLinkType="3">
      <libraryPathEntry kind="4" path="">
        <excludedEntries>
          <libraryPathEntry kind="3" linkType="1" path="${PROJECT_FRAMEWORKS}/libs/flex.swc" useDefaultLinkType="false"/>
        </excludedEntries>
      </libraryPathEntry>
    </libraryPath>
and the null argument problem went away