The code is here,
class Bar {
private int a;
void aMethod() {
while (true) {
String a = "0";
a = a + "1";
}
}
}
I want to get the real type of a. I tried to use the code below,
public class GetTypeOfReference {
private static final String FILE_PATH = "src\\com\\test\\Bar.java";
public static void main(String[] args) throws FileNotFoundException {
TypeSolver typeSolver = new CombinedTypeSolver();
JavaSymbolSolver symbolSolver = new JavaSymbolSolver(typeSolver);
StaticJavaParser.getConfiguration().setSymbolResolver(symbolSolver);
CompilationUnit cu = StaticJavaParser.parse(new File(FILE_PATH));
cu.findAll(AssignExpr.class).forEach(ae -> {
ResolvedType resolvedType = ae.calculateResolvedType();
System.out.println(ae.toString() + " is a: " + resolvedType.describe());
});
}
}
But got the error,
Exception in thread "main" UnsolvedSymbolException{context='null', name='String', cause='null'}
at com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade.convertToUsage(JavaParserFacade.java:509)
at com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade.convert(JavaParserFacade.java:567)
at com.github.javaparser.symbolsolver.javaparsermodel.declarations.JavaParserSymbolDeclaration.getType(JavaParserSymbolDeclaration.java:146)
at com.github.javaparser.symbolsolver.model.resolution.Value.from(Value.java:40)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
at java.base/java.util.LinkedList$LLSpliterator.tryAdvance(LinkedList.java:1253)
at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:127)
at java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:502)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:488)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at java.base/java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:152)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:476)
at com.github.javaparser.symbolsolver.javaparsermodel.contexts.AbstractJavaParserContext.solveWithAsValue(AbstractJavaParserContext.java:149)
at com.github.javaparser.symbolsolver.javaparsermodel.contexts.StatementContext.solveSymbolAsValue(StatementContext.java:135)
at com.github.javaparser.symbolsolver.resolution.SymbolSolver.solveSymbolAsValue(SymbolSolver.java:68)
at com.github.javaparser.symbolsolver.resolution.SymbolSolver.solveSymbolAsValue(SymbolSolver.java:73)
at com.github.javaparser.symbolsolver.javaparsermodel.TypeExtractor.visit(TypeExtractor.java:277)
at com.github.javaparser.symbolsolver.javaparsermodel.TypeExtractor.visit(TypeExtractor.java:44)
at com.github.javaparser.ast.expr.NameExpr.accept(NameExpr.java:79)
at com.github.javaparser.symbolsolver.javaparsermodel.TypeExtractor.visit(TypeExtractor.java:98)
at com.github.javaparser.symbolsolver.javaparsermodel.TypeExtractor.visit(TypeExtractor.java:44)
at com.github.javaparser.ast.expr.AssignExpr.accept(AssignExpr.java:135)
at com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade.getTypeConcrete(JavaParserFacade.java:448)
at com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade.getType(JavaParserFacade.java:310)
at com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade.getType(JavaParserFacade.java:292)
at com.github.javaparser.symbolsolver.JavaSymbolSolver.calculateType(JavaSymbolSolver.java:250)
at com.github.javaparser.ast.expr.Expression.calculateResolvedType(Expression.java:564)
at test.GetTypeOfReference.lambda$0(GetTypeOfReference.java:32)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1378)
at test.GetTypeOfReference.main(GetTypeOfReference.java:31)
What is the right way to do this?
