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package org.checkerframework.checker.calledmethods.qual;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Repeatable;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.checkerframework.framework.qual.InheritedAnnotation;
import org.checkerframework.framework.qual.PostconditionAnnotation;
import org.checkerframework.framework.qual.QualifierArgument;
/**
* Indicates that the method, if it terminates successfully, always invokes the given methods on the
* given expressions. This annotation is repeatable, which means that users can write more than one
* instance of it on the same method (users should NOT manually write an
* {@code @EnsuresCalledMethods.List} annotation, which the checker will create from multiple copies
* of this annotation automatically).
*
* Consider the following method:
*
*
* @EnsuresCalledMethods(value = "#1", methods = "m")
* public void callM(T t) { ... }
*
*
* This method guarantees that {@code t.m()} is always called before the method returns.
*
*
If a class has any {@code @}{@link org.checkerframework.checker.mustcall.qual.Owning Owning}
* fields, then one or more of its must-call methods should be annotated to indicate that the
* must-call obligations are satisfied. The must-call methods are those named by the {@code @}{@link
* org.checkerframework.checker.mustcall.qual.MustCall MustCall} or {@code @}{@link
* org.checkerframework.checker.mustcall.qual.InheritableMustCall InheritableMustCall} annotation on
* the class declaration, such as {@code close()}. Here is a common example:
*
*
* @EnsuresCalledMethods(value = {"owningField1", "owningField2"}, methods = "close")
* public void close() { ... }
*
*
* @see EnsuresCalledMethodsIf
* @see EnsuresCalledMethodsOnException
* @checker_framework.manual #called-methods-checker Called Methods Checker
*/
@PostconditionAnnotation(qualifier = CalledMethods.class)
@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
@Repeatable(EnsuresCalledMethods.List.class)
@InheritedAnnotation
public @interface EnsuresCalledMethods {
/**
* The Java expressions that will have methods called on them.
*
* @return the Java expressions that will have methods called on them
* @see org.checkerframework.framework.qual.EnsuresQualifier
*/
// Postconditions must use "value" as the name (conditional postconditions use "expression").
String[] value();
/**
* The methods guaranteed to be invoked on the expressions.
*
* @return the methods guaranteed to be invoked on the expressions
*/
@QualifierArgument("value")
String[] methods();
/**
* A wrapper annotation that makes the {@link EnsuresCalledMethods} annotation repeatable. This
* annotation is an implementation detail: programmers generally do not need to write this. It is
* created automatically by Java when a programmer writes more than one {@link
* EnsuresCalledMethods} annotation at the same location.
*/
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
@InheritedAnnotation
@PostconditionAnnotation(qualifier = CalledMethods.class)
public static @interface List {
/**
* Return the repeatable annotations.
*
* @return the repeatable annotations
*/
EnsuresCalledMethods[] value();
}
}