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8257596: Clarify trusted final fields for record classes

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Reviewed-by: hseigel, chegar, psandoz
This commit is contained in:
Mandy Chung 2020-12-11 22:44:48 +00:00
parent b1afed7501
commit 2001da3dd4
4 changed files with 44 additions and 29 deletions
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20
src/java.base/share/classes/java/lang/Class.java
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@ -2383,11 +2383,7 @@ public final class Class<T> implements java.io.Serializable,
if (!isRecord()) {
return null;
}
RecordComponent[] recordComponents = getRecordComponents0();
if (recordComponents == null) {
return new RecordComponent[0];
}
return recordComponents;
return getRecordComponents0();
}
/**
@ -3577,9 +3573,17 @@ public final class Class<T> implements java.io.Serializable,
private native Field[] getDeclaredFields0(boolean publicOnly);
private native Method[] getDeclaredMethods0(boolean publicOnly);
private native Constructor<T>[] getDeclaredConstructors0(boolean publicOnly);
private native Class<?>[] getDeclaredClasses0();
private native Class<?>[] getDeclaredClasses0();
/*
* Returns an array containing the components of the Record attribute,
* or null if the attribute is not present.
*
* Note that this method returns non-null array on a class with
* the Record attribute even if this class is not a record.
*/
private native RecordComponent[] getRecordComponents0();
private native boolean isRecord0();
private native boolean isRecord0();
/**
* Helper method to get the method name from arguments.
@ -3706,6 +3710,8 @@ public final class Class<T> implements java.io.Serializable,
* @since 16
*/
public boolean isRecord() {
// this superclass and final modifier check is not strictly necessary
// they are intrinsified and serve as a fast-path check
return getSuperclass() == java.lang.Record.class &&
(this.getModifiers() & Modifier.FINAL) != 0 &&
isRecord0();