| // Test for Checker Framework issue 273: |
| // https://github.com/typetools/checker-framework/issues/273 |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.checkerframework.checker.nullness.qual.*; |
| |
| public class KeyForShadowing { |
| public static void main(String... p) { |
| Map<String, Integer> m0 = new HashMap<>(); |
| Map<String, Integer> m1 = new HashMap<>(); |
| String k = "key"; |
| m0.put(k, 1); // k is @KeyFor("m0") after this line |
| |
| // We expect an error for the next one since we are not respecting the method contract. It |
| // expects the key to be for the second parameter, not the first. |
| |
| // :: error: (argument) |
| getMap3(m0, m1, k).toString(); |
| |
| // We expect an error for the next one since although we are respecting the method contract, |
| // since the key is for the first parameter, the Nullness Checker is misinterpreting "m1" to be |
| // the local m1 to this method, and not the first parameter to the method. |
| |
| // :: error: (argument) |
| getMap2(m0, m1, k).toString(); |
| |
| // :: error: (argument) |
| getMap1(m0, m1, k).toString(); |
| |
| getMap4(m0, m1, k).toString(); |
| } |
| |
| public static @NonNull Integer getMap1( |
| Map<String, Integer> m1, // m1,m0 flipped |
| Map<String, Integer> m0, |
| // :: error: (expression.unparsable) |
| @KeyFor("m0") String k) { |
| // :: error: (return) |
| return m0.get(k); |
| } |
| |
| public static @NonNull Integer getMap2( |
| Map<String, Integer> m1, // m1,m0 flipped |
| Map<String, Integer> m0, |
| // :: error: (expression.unparsable) |
| @KeyFor("m1") String k) { |
| // This method body is incorrect. |
| // We expect this error because we are indicating that |
| // the key is for m1, so m0.get(k) is @Nullable. |
| // :: error: (return) |
| return m0.get(k); |
| } |
| |
| public static @NonNull Integer getMap3( |
| Map<String, Integer> m1, // m1,m0 flipped |
| Map<String, Integer> m0, |
| @KeyFor("#2") String k) { |
| return m0.get(k); |
| } |
| |
| public static @NonNull Integer getMap4( |
| Map<String, Integer> m1, // m1,m0 flipped |
| Map<String, Integer> m0, |
| @KeyFor("#1") String k) { |
| // This method body is incorrect. |
| // We expect this error because we are indicating that |
| // the key is for m1, so m0.get(k) is @Nullable. |
| // :: error: (return) |
| return m0.get(k); |
| } |
| } |