SwingTest.java

import org.checkerframework.checker.fenum.qual.SwingBoxOrientation;
import org.checkerframework.checker.fenum.qual.SwingCompassDirection;
import org.checkerframework.checker.fenum.qual.SwingHorizontalOrientation;
import org.checkerframework.checker.fenum.qual.SwingVerticalOrientation;

public class SwingTest {

    static @SwingVerticalOrientation int BOTTOM;
    static @SwingCompassDirection int NORTH;

    static @SwingHorizontalOrientation int CENTER;
    static @SwingHorizontalOrientation int LEFT;

    static void m(@SwingVerticalOrientation int box) {}

    public static void main(String[] args) {
        // ok
        m(BOTTOM);

        //:: error: (argument.type.incompatible)
        m(5);

        //:: error: (argument.type.incompatible)
        m(NORTH);
    }

    @SuppressWarnings("swingverticalorientation")
    static void ignoreAll() {
        m(NORTH);

        @SwingVerticalOrientation int b = 5;
    }

    @SuppressWarnings("fenum:argument.type.incompatible")
    static void ignoreOne() {
        m(NORTH);

        //:: error: (assignment.type.incompatible)
        @SwingVerticalOrientation int b = 5;
    }

    void testNull() {
        // This enum should only be used on ints, but I wanted to
        // test how an Object enum and null interact.
        @SwingVerticalOrientation Object box = null;
    }

    @SwingVerticalOrientation Object testNullb() {
        return null;
    }

    @SwingVerticalOrientation Object testNullc() {
        Object o = null;
        return o;
    }

    @SwingVerticalOrientation int testInference0() {
        //:: error: (assignment.type.incompatible)
        @SwingVerticalOrientation int boxint = 5;
        int box = boxint;
        return box;
    }

    Object testInference1() {
        Object o = new String();
        return o;
    }

    @SwingVerticalOrientation int testInference2() {
        int i = BOTTOM;
        return i;
    }

    @SwingVerticalOrientation Object testInference3() {
        //:: error: (assignment.type.incompatible)
        @SwingVerticalOrientation Object boxobj = new Object();
        Object obox = boxobj;
        return obox;
    }

    int testInference4() {
        int aint = 5;
        return aint;
    }

    Object testInference5() {
        Object o = null;
        if (5 == 4) {
            o = new Object();
        }
        return o;
    }

    Object testInference5b() {
        Object o = null;
        if (5 == 4) {
            o = new Object();
        } else {
        }
        // the empty else branch actually covers a different code path!
        return o;
    }

    @SwingHorizontalOrientation int testInference5c() {
        int o;
        if (5 == 4) {
            o = CENTER;
        } else {
            o = LEFT;
        }
        return o;
    }

    int testInference6() {
        int last = 0;
        last += 1;
        return last;
    }

    @SwingBoxOrientation Object testInference7() {
        Object o = new @SwingVerticalOrientation Object();
        if (5 == 4) {
            o = new @SwingHorizontalOrientation Object();
        } else {
            //   o = new @SwingVerticalOrientation Object();
        }
        return o;
    }

    @SwingBoxOrientation Object testInference7b() {
        Object o;
        if (5 == 4) {
            o = new @SwingHorizontalOrientation Object();
        } else {
            o = new @SwingVerticalOrientation Object();
        }
        return o;
    }

    @SwingBoxOrientation Object testInference7c() {
        Object o = null;
        if (5 == 4) {
            o = new @SwingHorizontalOrientation Object();
        } else {
            o = new @SwingVerticalOrientation Object();
        }
        return o;
    }

    int s1 = 0;
    int c = 3;

    void testInference8() {
        int s2 = s1;
        s1 = (s2 &= c);
    }

    void testInference8b() {
        //:: error: (assignment.type.incompatible)
        @SwingHorizontalOrientation int s2 = 5;
        //:: error: (compound.assignment.type.incompatible)
        s2 += 1;

        //:: error: (assignment.type.incompatible)
        s1 = (s2 += s2);

        //:: error: (assignment.type.incompatible)
        @SwingHorizontalOrientation String str = "abc";
        // yes, somebody in the Swing API really wrote this.
        str += null;
    }

    boolean flag;

    Object testInference9() {
        Object o = null;
        while (flag) {
            if (5 == 4) {
                o = new @SwingHorizontalOrientation Object();
            } else {
                o = new @SwingVerticalOrientation Object();
                // note that this break makes a difference!
                break;
            }
        }
        //:: error: (return.type.incompatible)
        return o;
    }

    @SwingBoxOrientation Object testInference9b() {
        Object o = null;
        while (flag) {
            if (5 == 4) {
                o = new @SwingHorizontalOrientation Object();
            } else {
                o = new @SwingVerticalOrientation Object();
                // note that this break makes a difference!
                break;
            }
        }
        return o;
    }

    @SwingHorizontalOrientation Object testInference9c() {
        Object o = null;
        while (flag) {
            if (5 == 4) {
                o = new @SwingHorizontalOrientation Object();
            } else {
                o = new @SwingVerticalOrientation Object();
                // note that this break makes a difference!
                break;
            }
        }
        //:: error: (return.type.incompatible)
        return o;
    }

    @SwingVerticalOrientation Object testInference9d() {
        Object o = null;
        while (flag) {
            if (5 == 4) {
                o = new @SwingHorizontalOrientation Object();
            } else {
                o = new @SwingVerticalOrientation Object();
                // note that this break makes a difference!
                break;
            }
        }
        //:: error: (return.type.incompatible)
        return o;
    }

    @SwingBoxOrientation Object testInference9e() {
        Object o = null;
        while (flag) {
            if (5 == 4) {
                o = new @SwingHorizontalOrientation Object();
            } else {
                o = new @SwingVerticalOrientation Object();
            }
        }
        return o;
    }

    /* TODO: Flow inference does not handle dead branches correctly.
     * The return statement is only reachable with i being unqualified.
     * However, the else-branch does not initialize the variable, leaving it
     * at the @FenumTop initial value.
    int testInferenceThrow() {
        int i;
        if ( 5==4 ) {
          i = 5;
        } else {
          throw new RuntimeException("bla");
        }
        return i;
    }
    */

    @SwingVerticalOrientation Object testDefaulting0() {
        @org.checkerframework.framework.qual.DefaultQualifier(SwingVerticalOrientation.class)
        Object o = new String();
        return o;
    }
}