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checker-qual-android contains annotations (type qualifiers) that a programmer writes to specify Java code for type-checking by the Checker Framework. The checker-qual-android artifact is identical to the checker-qual artifact, except that in checker-qual-android annotations have classfile retention. The default Android Gradle plugin retains types annotated with runtime annotations in the main dex, but strips out class-retention annotations.

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package org.checkerframework.checker.lock.qual;

import org.checkerframework.framework.qual.DefaultFor;
import org.checkerframework.framework.qual.LiteralKind;
import org.checkerframework.framework.qual.QualifierForLiterals;
import org.checkerframework.framework.qual.SubtypeOf;
import org.checkerframework.framework.qual.TargetLocations;
import org.checkerframework.framework.qual.TypeUseLocation;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * A type that represents a newly-constructed object. It can be treated as having any
 * {@code @}{@link GuardedBy} type. Typically, it is only written on factory method return types.
 *
 * @checker_framework.manual #lock-checker Lock Checker
 */
@Documented
@Retention(RetentionPolicy.CLASS)
@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
@TargetLocations({
    TypeUseLocation.LOWER_BOUND,
    TypeUseLocation.UPPER_BOUND,
    TypeUseLocation.CONSTRUCTOR_RESULT,
    TypeUseLocation.RETURN
})
@SubtypeOf({GuardedBy.class, GuardSatisfied.class})
@DefaultFor(TypeUseLocation.CONSTRUCTOR_RESULT)
@QualifierForLiterals({LiteralKind.STRING, LiteralKind.PRIMITIVE})
public @interface NewObject {}