Question

我正在尝试实现自定义lint检查，如果函数参数类型没有使用特定注释进行注释，则应该报告对给定函数的调用。

@MyAnnotation
class ClassA {
    void memberMethod() {
        SomeUtil.someMethod(this); // first call
    }
}

class ClassB {
    void memberMethod() {
        SomeUtil.someMethod(this); // second call
    }
}

我希望lint报告第二个电话，但不是第一个电话。

我设法报告了参数表达式。但lint报告了两个电话，我不知道为什么......

public class MyDetector extends Detector implements Detector.JavaPsiScanner {
    private static final Class<? extends Detector> DETECTOR_CLASS = MyDetector.class;
    private static final EnumSet<Scope> DETECTOR_SCOPE = Scope.JAVA_FILE_SCOPE;

    private static final Implementation IMPLEMENTATION = new Implementation(
        DETECTOR_CLASS,
        DETECTOR_SCOPE
    );

    private static final String ISSUE_ID = "MyId";
    private static final String ISSUE_DESCRIPTION = "Some short description.";
    private static final String ISSUE_EXPLANATION = "Some long description.";
    private static final Category ISSUE_CATEGORY = Category.CORRECTNESS;
    private static final int ISSUE_PRIORITY = 7;
    private static final Severity ISSUE_SEVERITY = Severity.WARNING;

    public static final Issue ISSUE = Issue.create(
        ISSUE_ID,
        ISSUE_DESCRIPTION,
        ISSUE_EXPLANATION,
        ISSUE_CATEGORY,
        ISSUE_PRIORITY,
        ISSUE_SEVERITY,
        IMPLEMENTATION
    );

    public MyDetector() {
    }

    @Override
    public boolean appliesTo(Context context, File file) {
        return true;
    }

    @Override
    public EnumSet<Scope> getApplicableFiles() {
        return Scope.JAVA_FILE_SCOPE;
    }

    @Override
    public List<String> getApplicableMethodNames() {
        return Collections.singletonList("someMethod");
    }

    @Override
    public void visitMethod(JavaContext context, JavaElementVisitor visitor, PsiMethodCallExpression call, PsiMethod method) {
        for (PsiExpression psi : call.getArgumentList().getExpressions()) {
            PsiType type = psi.getType();
            if (type != null) {
                for (PsiAnnotation anno : type.getAnnotations()) { // type.getAnnotations() is always empty
                    if (MyAnnotation.class.getName().equals(anno.getQualifiedName())) {
                        return;
                    }
                }
                context.report(ISSUE, context.getLocation(psi), ISSUE.getBriefDescription(TextFormat.TEXT));
            }
        }
    }
}

也许我在这里做错了但是我找不到一些好的Psi文档......

Answer 1

经过深入研究后，我终于开始工作了。我不得不将PsiType转换为PsiClass并从那里读取注释。

如何获取PsiType的注释？

1 个答案: