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Java: Implemented MethodHandle part of inspection "MethodHandle/VarHandle invocation arguments mismatch" (IDEA-171813)

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This commit is contained in:
Pavel Dolgov
2017-05-05 13:14:04 +03:00
parent 5f703db7df
commit 7d81b55b37
18 changed files with 1361 additions and 136 deletions
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java/java-tests/testData/inspection/javaLangReflectHandleInvocation/StaticGetter.java
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import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
class Main {
void fooInt() throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.lookup();
MethodHandle handle = lookup.findStaticGetter(Test.class, "n", int.class);
int exactSignature1 = (int) handle.invokeWithArguments();
int exactSignature2 = (int) handle.invoke();
int exactSignature3 = (int) handle.invokeExact();
Object objectResult = handle.invokeWithArguments();
objectResult = handle.invoke();
objectResult = <warning descr="Should be cast to 'int'">handle.invokeExact</warning>();
Object objectResult1 = <warning descr="Should be cast to 'int'">handle.invokeExact</warning>();
int argumentsArray1 = (int) handle.invokeWithArguments(new Object[]{});
int argumentsArray2 = (int) handle.invoke<warning descr="No arguments are expected">(new Object[]{})</warning>;
int argumentsArray3 = (int) handle.invokeExact<warning descr="No arguments are expected">(new Object[]{})</warning>;
Integer boxedResult1 = (Integer) handle.invokeWithArguments();
Integer boxedResult2 = (Integer) handle.invoke();
Integer boxedResult3 = (<warning descr="Should be cast to 'int'">Integer</warning>) handle.invokeExact();
String incompatibleResult1 = (<warning descr="Should be cast to 'int'">String</warning>) handle.invokeWithArguments();
String incompatibleResult2 = (<warning descr="Should be cast to 'int'">String</warning>) handle.invoke();
String incompatibleResult3 = (<warning descr="Should be cast to 'int'">String</warning>) handle.invokeExact();
int tooManyArguments1 = (int) handle.invokeWithArguments<warning descr="No arguments are expected">(1, "a")</warning>;
int tooManyArguments2 = (int) handle.invoke<warning descr="No arguments are expected">(2, "b")</warning>;
int tooManyArguments3 = (int) handle.invokeExact<warning descr="No arguments are expected">(3, "c")</warning>;
Test instance = new Test();
int instanceArgument1 = (int) handle.invokeWithArguments<warning descr="No arguments are expected">(instance)</warning>;
int instanceArgument2 = (int) handle.invoke<warning descr="No arguments are expected">(instance)</warning>;
int instanceArgument3 = (int) handle.invokeExact<warning descr="No arguments are expected">(instance)</warning>;
}
void fooStr() throws Throwable {
final MethodHandles.Lookup lookup = MethodHandles.lookup();
final MethodHandle handle = lookup.findStaticGetter(Test.class, "s", String.class);
String exactSignature1 = (String) handle.invokeWithArguments();
String exactSignature2 = (String) handle.invoke();
String exactSignature3 = (String) handle.invokeExact();
Object objectResult = handle.invokeWithArguments();
objectResult = handle.invoke();
objectResult = <warning descr="Should be cast to 'java.lang.String'">handle.invokeExact</warning>();
Object objectResult1 = <warning descr="Should be cast to 'java.lang.String'">handle.invokeExact</warning>();
String argumentsArray1 = (String) handle.invokeWithArguments(new Object[]{});
String argumentsArray2 = (String) handle.invoke<warning descr="No arguments are expected">(new Object[]{})</warning>;
String argumentsArray3 = (String) handle.invokeExact<warning descr="No arguments are expected">(new Object[]{})</warning>;
int incompatibleResult1 = (<warning descr="Should be cast to 'java.lang.String' or its superclass">int</warning>) handle.invokeWithArguments();
int incompatibleResult2 = (<warning descr="Should be cast to 'java.lang.String' or its superclass">int</warning>) handle.invoke();
int incompatibleResult3 = (<warning descr="Should be cast to 'java.lang.String'">int</warning>) handle.invokeExact();
String tooManyArguments1 = (String) handle.invokeWithArguments<warning descr="No arguments are expected">("a", 1)</warning>;
String tooManyArguments2 = (String) handle.invoke<warning descr="No arguments are expected">("b", 2)</warning>;
String tooManyArguments3 = (String) handle.invokeExact<warning descr="No arguments are expected">("c", 3)</warning>;
final Test instance = new Test();
String instanceArgument1 = (String) handle.invokeWithArguments<warning descr="No arguments are expected">(instance)</warning>;
String instanceArgument2 = (String) handle.invoke<warning descr="No arguments are expected">(instance)</warning>;
String instanceArgument3 = (String) handle.invokeExact<warning descr="No arguments are expected">(instance)</warning>;
CharSequence superclassResult1 = (CharSequence) handle.invokeWithArguments();
CharSequence superclassResult2 = (CharSequence) handle.invoke();
CharSequence superclassResult3 = (<warning descr="Should be cast to 'java.lang.String'">CharSequence</warning>) handle.invokeExact();
}
}
class Super {}
class Test extends Super {
public static int n;
public static String s;
}