javaparser UnsolvedSymbolException - 正在解析的类上使用的类，使用了另一个未解析的类

Question

我不确定我是否在标题中很好地描述了这个问题，但背景是这样的:我想解析一个java源代码，比如TestClassOne.java。

TestClassOne 使用另一个类“TestClassTwo”声明为实例变量。现在，TestClassTwo 有一个类 TestClassThree 被声明为实例变量。

现在，当我的目标类 TestClassOne 通过 TestClassTwo 获取 TestClassThree 的引用时，问题就出现了，因此方法 test() 如下:

 public class TestClassOne {    
       private TestClassTwo testTwo = new TestClassTwo();

    public void test() {
        TestClassThree three = testTwo.getTestThree();
     }
    }

这是异常(exception):

Exception in thread "main" UnsolvedSymbolException{context='unknown', name='TestClassThree', typeSolver=null}
    at com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade.convertToUsage(JavaParserFacade.java:418)
    at com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade.convertToUsage(JavaParserFacade.java:395)
    at com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade.convertToUsageVariableType(JavaParserFacade.java:387)
    at com.github.javaparser.symbolsolver.javaparsermodel.TypeExtractor.visit(TypeExtractor.java:302)
    at com.github.javaparser.symbolsolver.javaparsermodel.TypeExtractor.visit(TypeExtractor.java:34)
    at com.github.javaparser.ast.expr.VariableDeclarationExpr.accept(VariableDeclarationExpr.java:104)
    at com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade.getTypeConcrete(JavaParserFacade.java:371)
    at com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade.getType(JavaParserFacade.java:263)
    at com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade.getType(JavaParserFacade.java:257)

这是我的代码:

import com.github.javaparser.JavaParser;
import com.github.javaparser.ParseException;
import com.github.javaparser.ast.CompilationUnit;
import com.github.javaparser.symbolsolver.javaparsermodel.JavaParserFacade;
import com.github.javaparser.symbolsolver.resolution.typesolvers.CombinedTypeSolver;
import com.github.javaparser.symbolsolver.resolution.typesolvers.JavaParserTypeSolver;
import com.github.javaparser.symbolsolver.resolution.typesolvers.ReflectionTypeSolver;
public class TestParser {

    public static void main(String[] args) throws FileNotFoundException, ParseException {

        TypeCalculatorVisitor visitor = new TypeCalculatorVisitor();

        CombinedTypeSolver combinedTypeSolver = new CombinedTypeSolver();
        combinedTypeSolver.add(new ReflectionTypeSolver());

        combinedTypeSolver
        .add(new JavaParserTypeSolver(new File("..src/javaparser")));

        combinedTypeSolver.add(
        new JavaParserTypeSolver(new File("..src/javaparser_pkg2")));

        combinedTypeSolver.add(
        new JavaParserTypeSolver(new File("..src/javaparser_pkg3")));       

        CompilationUnit agendaCu = JavaParser.parse(new FileInputStream(
                new File("..src/javaparser/TestClassOne.java")));

        agendaCu.accept(visitor, JavaParserFacade.get(combinedTypeSolver));

        System.out.println(visitor.getParseResult());
    }

}

测试类一:

import javaparser_pkg2.TestClassTwo;
import javaparser_pkg3.TestClassThree;

public class TestClassOne {
    private TestClassTwo testTwo = new TestClassTwo();

    public void test() {
        TestClassThree three = testTwo.getTestThree();
    }   
}

测试类二:

import javaparser_pkg3.TestClassThree;

public class TestClassTwo {
    private int age;
    private String status;

    private TestClassThree testThree = new TestClassThree();

    public TestClassThree getTestThree() {
        return testThree;
    }
    public void setTestThree(TestClassThree testThree) {
        this.testThree = testThree;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getStatus() {
        return status;
    }
    public void setStatus(String status) {
        this.status = status;
    }

}

测试类三:

package javaparser_pkg3;

public class TestClassThree {
    private String name;
    private int ID;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getID() {
        return ID;
    }
    public void setID(int iD) {
        ID = iD;
    }

}

我已将 TestClassThree 的目录添加为组合类型解析器(见上文)，但仍然不起作用:

combinedTypeSolver.add(
            new JavaParserTypeSolver(new File("..src/javaparser_pkg3")));

应该如何正确完成此操作？

感谢和问候!

Answer 1

这里是JavaSymbolSolver的维护器。当您定义您的JavaParserTypeSolver时例如，您应该指向源目录的根目录，因为 JavaSymbolSolver 将查找类，计算从考虑包的源目录根目录开始的路径。例如，如果您指定 JavaSymbolSolver(new File("/src/foo"))然后寻找类a.b.C.java它将检查是否有名为 /src/foo/a/b/C.java 的文件存在。您没有指定包目录。如果指定JavaSymbolSolver(new File("/src/foo/a/b"))它将查找文件 src/foo/a/b/a/b/C.java这是不存在的。

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