There is a declared method but, MethodAmbiguityException occurred

[JeewoongKim]

Hi, this is my first time using JSS 3.18.
This may a question rather than an issue.

I faced a problem when resolving the arguments in a method call expression.
It seems that the CollectionUtils.get(expected, 0) at line 6 is a cause.
The related JARS are added through lines 22-25 including a classpath (i.e., CollectionUtils' parent dir) that is declared the method

Sorry for not being able to explainable the problem as descriptive

Here are my codes and a stack trace:

Method call

1 public void getFromMap() {  
2      final Map<String, String> expected = new HashMap<>();
3      expected.put("zeroKey", "zero");
4      expected.put("oneKey", "one");
5      final Map<String, String> found = new HashMap<>();
6      Map.Entry<String, String> entry = CollectionUtils.get(expected, 0);
7 }

Method declaration (CollectionUtils.java)

69  public static <K,V> Map.Entry<K, V> get(final Map<K,V> map, final int index) {  ...  }

JSS part

20  TypeSolver typeSolver = new CombinedTypeSolver(
21                 new ReflectionTypeSolver(),
22                 JarTypeSolver.getJarTypeSolver("NECESSARY-JARS"),
...                   ... );
26   JavaSymbolSolver symbolSolver = new JavaSymbolSolver(typeSolver);
27   StaticJavaParser.getConfiguration().setSymbolResolver(symbolSolver);
28   CompilationUnit cu = StaticJavaParser.parse(new File(FILE_PATH));

Stack trace

com.github.javaparser.resolution.MethodAmbiguityException: Ambiguous method call: cannot find a most applicable method: 
JavassistMethodDeclaration{ctMethod=javassist.CtMethod@fc1cfe2e[public static get (Ljava/lang/Object;I)Ljava/lang/Object;]}, 
JavassistMethodDeclaration{ctMethod=javassist.CtMethod@46eaf0f9[public static get (Ljava/util/Map;I)Ljava/util/Map$Entry;]}

    at com.github.javaparser.symbolsolver.resolution.MethodResolutionLogic.findMostApplicable (MethodResolutionLogic.java:587)
    at com.github.javaparser.symbolsolver.resolution.MethodResolutionLogic.findMostApplicable (MethodResolutionLogic.java:501)
    at com.github.javaparser.symbolsolver.javassistmodel.JavassistClassDeclaration.solveMethod (JavassistClassDeclaration.java:259)
    at com.github.javaparser.symbolsolver.resolution.MethodResolutionLogic.solveMethodInType (MethodResolutionLogic.java:787)
    at com.github.javaparser.symbolsolver.javaparsermodel.contexts.MethodCallExprContext.solveMethod (MethodCallExprContext.java:177)
    at com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade.solve (JavaParserFacade.java:321)
    at com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade.solve (JavaParserFacade.java:183)
    at com.github.javaparser.symbolsolver.JavaSymbolSolver.resolveDeclaration (JavaSymbolSolver.java:161)
    at com.github.javaparser.ast.expr.MethodCallExpr.resolve (MethodCallExpr.java:313)
    at org.myMain.lambda$GetMethodCallExprList$3 (myMain.java:183)

Do I have to add the java.util.* to within lines 22-25?
Could you give me any advice or materials to solve the problem?
I read a tutorial (JavaParser-visited)

[jlerbsc]

Hi @JeewoongKim

Do I have to add the java.util.* to within lines 22-25?
No you don't have to declare this package because ReflectionTypeSolver can scan it for you.
Unfortunately this exception is probably caused by a bug! We will have to isolate the problem first with a simpler test case before we can help you solve this problem. It would have been faster if you had sent us a simplified test case :-)

[jlerbsc]

We can reproduce it with this unit test

@Test
void test() {
    String code = 
            "class A {\n" + 
            "        public void getFromMap() {\n" + 
            "            final java.util.Map<String, String> expected = new java.util.HashMap<>();\n" + 
            "            java.util.Map.Entry<String, String> entry = get(expected, 0);\n" + 
            "        }\n" + 
            "        <V, K> java.util.Map.Entry<K,V> get(java.util.Map<K,V> map, int index) {\n" + 
            "            return null;\n" + 
            "        }\n" + 
            "        Object get(Object map, int index) {\n" + 
            "            return null;\n" + 
            "        }\n" + 
            "    }";
    ParserConfiguration config = new ParserConfiguration();
    StaticJavaParser.getConfiguration().setSymbolResolver(new JavaSymbolSolver(new ReflectionTypeSolver()));
    CompilationUnit cu = StaticJavaParser.parse(code);
    MethodCallExpr mce = cu.findFirst(MethodCallExpr.class).get();
    System.out.println(mce.resolve().getQualifiedName());
}

[JeewoongKim]

@jlerbsc Thanks for fixing the issue.