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The Checker Framework enhances Java’s type system to make it more powerful and useful. This lets software developers detect and prevent errors in their Java programs. The Checker Framework includes compiler plug-ins ("checkers") that find bugs or verify their absence. It also permits you to write your own compiler plug-ins.

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package org.checkerframework.checker.signature.qual;

import java.lang.annotation.Target;
import java.lang.annotation.ElementType;

import org.checkerframework.framework.qual.ImplicitFor;
import org.checkerframework.framework.qual.SubtypeOf;

/**
 * The type representation used by the {@link Class#getName()},
 * {@link Class#forName(String)}, and {@link Class#forName(String, boolean,
 * ClassLoader)} methods.  This format is:
 * 
 *   for any non-array type, the {@link BinaryName binary name}
 *   
for any array type, a format like the {@link FieldDescriptor field descriptor}, but using '.' where the field descriptor uses '/'
 * 
 * 
 *
 * Examples include
 * 
 *   java.lang.String
 *   [Ljava.lang.Object;
 *   int
 *   [[[I
 * 
 *
 * @checker_framework.manual #signature-checker Signature Checker
 */
@SubtypeOf(SignatureUnknown.class)
@ImplicitFor(stringPatterns="(^[A-Za-z_][A-Za-z_0-9]*(\\.[A-Za-z_][A-Za-z_0-9]*)*(\\$[A-Za-z_0-9]+)*$)|^\\[+([BCDFIJSZ]|L[A-Za-z_][A-Za-z_0-9]*(\\.[A-Za-z_][A-Za-z_0-9]*)*(\\$[A-Za-z_0-9]+)*;)$")
@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
public @interface ClassGetName {}