RawTypes.java

// Note that this file is a near duplicate in /nullness and /nullness-uninit

import org.checkerframework.checker.initialization.qual.UnknownInitialization;
import org.checkerframework.checker.nullness.qual.*;
import org.checkerframework.checker.nullness.qual.EnsuresNonNull;
import org.checkerframework.checker.nullness.qual.RequiresNonNull;

class RawTypes {

    class Bad {
        @NonNull String field;

        public Bad() {
            //:: error: (method.invocation.invalid)
            this.init(); // error
            //:: error: (method.invocation.invalid)
            init(); // error

            this.field = "field"; // valid
            //:: error: (assignment.type.incompatible)
            this.field = null; // error
            field = "field"; // valid
            //:: error: (assignment.type.incompatible)
            field = null; // error
        }

        void init() {
            output(this.field.length()); // valid
        }
    }

    class A {
        @NonNull String field;

        public A() {
            this.field = "field"; // valid
            field = "field"; // valid
            this.init(); // valid
            init(); // valid
        }

        public void init(@Raw @UnknownInitialization A this) {
            //:: error: (dereference.of.nullable)
            output(this.field.length());
        }

        public void initExpl2(@Raw @UnknownInitialization A this) {
            //:: error: (argument.type.incompatible)
            output(this.field);
        }

        public void initImpl1(@Raw @UnknownInitialization A this) {
            //:: error: (dereference.of.nullable)
            output(field.length());
        }

        public void initImpl2(@Raw @UnknownInitialization A this) {
            //:: error: (argument.type.incompatible)
            output(field);
        }
    }

    class B extends A {
        @NonNull String otherField;

        public B() {
            super();
            //:: error: (assignment.type.incompatible)
            this.otherField = null; // error
            this.otherField = "otherField"; // valid
        }

        @Override
        public void init(@Raw @UnknownInitialization B this) {
            //:: error: (dereference.of.nullable)
            output(this.field.length()); // error (TODO: substitution)
            super.init(); // valid
        }

        public void initImpl1(@Raw @UnknownInitialization B this) {
            //:: error: (dereference.of.nullable)
            output(field.length()); // error (TODO: substitution)
        }

        public void initExpl2(@Raw @UnknownInitialization B this) {
            //:: error: (dereference.of.nullable)
            output(this.otherField.length()); // error
        }

        public void initImpl2(@Raw @UnknownInitialization B this) {
            //:: error: (dereference.of.nullable)
            output(otherField.length()); // error
        }

        void other() {
            init(); // valid
            this.init(); // valid
        }

        void otherRaw(@Raw @UnknownInitialization B this) {
            init(); // valid
            this.init(); // valid
        }
    }

    //:: error: (initialization.fields.uninitialized)
    class C extends B {

        @NonNull String[] strings;

        @Override
        public void init(@Raw @UnknownInitialization C this) {
            //:: error: (dereference.of.nullable)
            output(this.strings.length); // error
            System.out.println(); // valid
        }
    }

    // To test whether the argument is @NonNull and @NonRaw
    static void output(@NonNull Object o) {}

    class D extends C {
        @Override
        public void init(@Raw @UnknownInitialization D this) {
            this.field = "s";
            output(this.field.length());
        }
    }

    class MyTest {
        Integer i;

        MyTest(int i) {
            this.i = i;
        }

        void myTest(@Raw @UnknownInitialization MyTest this) {
            //:: error: (unboxing.of.nullable)
            i = i + 1;
        }
    }

    class AllFieldsInitialized {
        Integer elapsedMillis = 0;
        Integer startTime = 0;

        public AllFieldsInitialized() {
            //:: error: (method.invocation.invalid)
            nonRawMethod();
        }

        public void nonRawMethod() {}
    }

    //:: error: (initialization.fields.uninitialized)
    class AFSIICell {
        AllFieldsSetInInitializer afsii;
    }

    class AllFieldsSetInInitializer {
        Integer elapsedMillis;
        Integer startTime;

        public AllFieldsSetInInitializer() {
            elapsedMillis = 0;
            //:: error: (method.invocation.invalid)
            nonRawMethod(); // error
            startTime = 0;
            //:: error: (method.invocation.invalid)
            nonRawMethod(); // error
            //:: error: (initialization.invalid.field.write.initialized)
            new AFSIICell().afsii = this;
        }

        //:: error: (initialization.fields.uninitialized)
        public AllFieldsSetInInitializer(boolean b) {
            //:: error: (method.invocation.invalid)
            nonRawMethod(); // error
        }

        public void nonRawMethod() {}
    }

    class ConstructorInvocations {
        Integer v;

        public ConstructorInvocations(int v) {
            this.v = v;
        }

        public ConstructorInvocations() {
            this(0);
            //:: error: (method.invocation.invalid)
            nonRawMethod(); // invalid
        }

        public void nonRawMethod() {}
    }

    class MethodAccess {
        public MethodAccess() {
            @NonNull String s = string();
        }

        public @NonNull String string(@Raw @UnknownInitialization MethodAccess this) {
            return "nonnull";
        }
    }

    void cast(@Raw @UnknownInitialization Object... args) {

        @SuppressWarnings("rawtypes")
        //:: error: (assignment.type.incompatible)
        Object[] argsNonRaw1 = args;

        @SuppressWarnings("cast")
        Object[] argsNonRaw2 = (Object[]) args;
    }

    class RawAfterConstructorBad {
        Object o;
        //:: error: (initialization.fields.uninitialized)
        RawAfterConstructorBad() {}
    }

    class RawAfterConstructorOK1 {
        @Nullable Object o;

        RawAfterConstructorOK1() {}
    }

    class RawAfterConstructorOK2 {
        Integer a;
        //:: error: (initialization.fields.uninitialized)
        RawAfterConstructorOK2() {}
    }

    // TODO: reinstate.  This shows desired features, for initialization in
    // a helper method rather than in the constructor.
    class InitInHelperMethod {
        Integer a;
        Integer b;

        InitInHelperMethod(short constructor_inits_ab) {
            a = 1;
            b = 1;
            //:: error: (method.invocation.invalid)
            nonRawMethod();
        }

        InitInHelperMethod(boolean constructor_inits_a) {
            a = 1;
            init_b();
            //:: error: (method.invocation.invalid)
            nonRawMethod();
        }

        @RequiresNonNull("a")
        @EnsuresNonNull("b")
        void init_b(@Raw @UnknownInitialization InitInHelperMethod this) {
            b = 2;
            //:: error: (method.invocation.invalid)
            nonRawMethod();
        }

        InitInHelperMethod(int constructor_inits_none) {
            init_ab();
            //:: error: (method.invocation.invalid)
            nonRawMethod();
        }

        @EnsuresNonNull({"a", "b"})
        void init_ab(@Raw @UnknownInitialization InitInHelperMethod this) {
            a = 1;
            b = 2;
            //:: error: (method.invocation.invalid)
            nonRawMethod();
        }

        void nonRawMethod() {}
    }
}