JDK 17 java.base.jmod - Base Module
JDK 17 java.base.jmod is the JMOD file for JDK 17 Base module.
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⏎ java/lang/reflect/Modifier.java
/*
* Copyright (c) 1996, 2020, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package java.lang.reflect;
import java.util.StringJoiner;
/**
* The Modifier class provides {@code static} methods and
* constants to decode class and member access modifiers. The sets of
* modifiers are represented as integers with distinct bit positions
* representing different modifiers. The values for the constants
* representing the modifiers are taken from the tables in sections
* {@jvms 4.1}, {@jvms 4.4}, {@jvms 4.5}, and {@jvms 4.7} of
* <cite>The Java Virtual Machine Specification</cite>.
*
* @see Class#getModifiers()
* @see Member#getModifiers()
*
* @author Nakul Saraiya
* @author Kenneth Russell
* @since 1.1
*/
public class Modifier {
/**
* Do not call.
*/
private Modifier() {throw new AssertionError();}
/**
* Return {@code true} if the integer argument includes the
* {@code public} modifier, {@code false} otherwise.
*
* @param mod a set of modifiers
* @return {@code true} if {@code mod} includes the
* {@code public} modifier; {@code false} otherwise.
*/
public static boolean isPublic(int mod) {
return (mod & PUBLIC) != 0;
}
/**
* Return {@code true} if the integer argument includes the
* {@code private} modifier, {@code false} otherwise.
*
* @param mod a set of modifiers
* @return {@code true} if {@code mod} includes the
* {@code private} modifier; {@code false} otherwise.
*/
public static boolean isPrivate(int mod) {
return (mod & PRIVATE) != 0;
}
/**
* Return {@code true} if the integer argument includes the
* {@code protected} modifier, {@code false} otherwise.
*
* @param mod a set of modifiers
* @return {@code true} if {@code mod} includes the
* {@code protected} modifier; {@code false} otherwise.
*/
public static boolean isProtected(int mod) {
return (mod & PROTECTED) != 0;
}
/**
* Return {@code true} if the integer argument includes the
* {@code static} modifier, {@code false} otherwise.
*
* @param mod a set of modifiers
* @return {@code true} if {@code mod} includes the
* {@code static} modifier; {@code false} otherwise.
*/
public static boolean isStatic(int mod) {
return (mod & STATIC) != 0;
}
/**
* Return {@code true} if the integer argument includes the
* {@code final} modifier, {@code false} otherwise.
*
* @param mod a set of modifiers
* @return {@code true} if {@code mod} includes the
* {@code final} modifier; {@code false} otherwise.
*/
public static boolean isFinal(int mod) {
return (mod & FINAL) != 0;
}
/**
* Return {@code true} if the integer argument includes the
* {@code synchronized} modifier, {@code false} otherwise.
*
* @param mod a set of modifiers
* @return {@code true} if {@code mod} includes the
* {@code synchronized} modifier; {@code false} otherwise.
*/
public static boolean isSynchronized(int mod) {
return (mod & SYNCHRONIZED) != 0;
}
/**
* Return {@code true} if the integer argument includes the
* {@code volatile} modifier, {@code false} otherwise.
*
* @param mod a set of modifiers
* @return {@code true} if {@code mod} includes the
* {@code volatile} modifier; {@code false} otherwise.
*/
public static boolean isVolatile(int mod) {
return (mod & VOLATILE) != 0;
}
/**
* Return {@code true} if the integer argument includes the
* {@code transient} modifier, {@code false} otherwise.
*
* @param mod a set of modifiers
* @return {@code true} if {@code mod} includes the
* {@code transient} modifier; {@code false} otherwise.
*/
public static boolean isTransient(int mod) {
return (mod & TRANSIENT) != 0;
}
/**
* Return {@code true} if the integer argument includes the
* {@code native} modifier, {@code false} otherwise.
*
* @param mod a set of modifiers
* @return {@code true} if {@code mod} includes the
* {@code native} modifier; {@code false} otherwise.
*/
public static boolean isNative(int mod) {
return (mod & NATIVE) != 0;
}
/**
* Return {@code true} if the integer argument includes the
* {@code interface} modifier, {@code false} otherwise.
*
* @param mod a set of modifiers
* @return {@code true} if {@code mod} includes the
* {@code interface} modifier; {@code false} otherwise.
*/
public static boolean isInterface(int mod) {
return (mod & INTERFACE) != 0;
}
/**
* Return {@code true} if the integer argument includes the
* {@code abstract} modifier, {@code false} otherwise.
*
* @param mod a set of modifiers
* @return {@code true} if {@code mod} includes the
* {@code abstract} modifier; {@code false} otherwise.
*/
public static boolean isAbstract(int mod) {
return (mod & ABSTRACT) != 0;
}
/**
* Return {@code true} if the integer argument includes the
* {@code strictfp} modifier, {@code false} otherwise.
*
* @param mod a set of modifiers
* @return {@code true} if {@code mod} includes the
* {@code strictfp} modifier; {@code false} otherwise.
*/
public static boolean isStrict(int mod) {
return (mod & STRICT) != 0;
}
/**
* Return a string describing the access modifier flags in
* the specified modifier. For example:
* <blockquote><pre>
* public final synchronized strictfp
* </pre></blockquote>
* The modifier names are returned in an order consistent with the
* suggested modifier orderings given in sections 8.1.1, 8.3.1, 8.4.3, 8.8.3, and 9.1.1 of
* <cite>The Java Language Specification</cite>.
* The full modifier ordering used by this method is:
* <blockquote> {@code
* public protected private abstract static final transient
* volatile synchronized native strictfp
* interface } </blockquote>
* The {@code interface} modifier discussed in this class is
* not a true modifier in the Java language and it appears after
* all other modifiers listed by this method. This method may
* return a string of modifiers that are not valid modifiers of a
* Java entity; in other words, no checking is done on the
* possible validity of the combination of modifiers represented
* by the input.
*
* Note that to perform such checking for a known kind of entity,
* such as a constructor or method, first AND the argument of
* {@code toString} with the appropriate mask from a method like
* {@link #constructorModifiers} or {@link #methodModifiers}.
*
* @param mod a set of modifiers
* @return a string representation of the set of modifiers
* represented by {@code mod}
*/
public static String toString(int mod) {
StringJoiner sj = new StringJoiner(" ");
if ((mod & PUBLIC) != 0) sj.add("public");
if ((mod & PROTECTED) != 0) sj.add("protected");
if ((mod & PRIVATE) != 0) sj.add("private");
/* Canonical order */
if ((mod & ABSTRACT) != 0) sj.add("abstract");
if ((mod & STATIC) != 0) sj.add("static");
if ((mod & FINAL) != 0) sj.add("final");
if ((mod & TRANSIENT) != 0) sj.add("transient");
if ((mod & VOLATILE) != 0) sj.add("volatile");
if ((mod & SYNCHRONIZED) != 0) sj.add("synchronized");
if ((mod & NATIVE) != 0) sj.add("native");
if ((mod & STRICT) != 0) sj.add("strictfp");
if ((mod & INTERFACE) != 0) sj.add("interface");
return sj.toString();
}
/*
* Access modifier flag constants from tables 4.1, 4.4, 4.5, and 4.7 of
* <cite>The Java Virtual Machine Specification</cite>
*/
/**
* The {@code int} value representing the {@code public}
* modifier.
*/
public static final int PUBLIC = 0x00000001;
/**
* The {@code int} value representing the {@code private}
* modifier.
*/
public static final int PRIVATE = 0x00000002;
/**
* The {@code int} value representing the {@code protected}
* modifier.
*/
public static final int PROTECTED = 0x00000004;
/**
* The {@code int} value representing the {@code static}
* modifier.
*/
public static final int STATIC = 0x00000008;
/**
* The {@code int} value representing the {@code final}
* modifier.
*/
public static final int FINAL = 0x00000010;
/**
* The {@code int} value representing the {@code synchronized}
* modifier.
*/
public static final int SYNCHRONIZED = 0x00000020;
/**
* The {@code int} value representing the {@code volatile}
* modifier.
*/
public static final int VOLATILE = 0x00000040;
/**
* The {@code int} value representing the {@code transient}
* modifier.
*/
public static final int TRANSIENT = 0x00000080;
/**
* The {@code int} value representing the {@code native}
* modifier.
*/
public static final int NATIVE = 0x00000100;
/**
* The {@code int} value representing the {@code interface}
* modifier.
*/
public static final int INTERFACE = 0x00000200;
/**
* The {@code int} value representing the {@code abstract}
* modifier.
*/
public static final int ABSTRACT = 0x00000400;
/**
* The {@code int} value representing the {@code strictfp}
* modifier.
*/
public static final int STRICT = 0x00000800;
// Bits not (yet) exposed in the public API either because they
// have different meanings for fields and methods and there is no
// way to distinguish between the two in this class, or because
// they are not Java programming language keywords
static final int BRIDGE = 0x00000040;
static final int VARARGS = 0x00000080;
static final int SYNTHETIC = 0x00001000;
static final int ANNOTATION = 0x00002000;
static final int ENUM = 0x00004000;
static final int MANDATED = 0x00008000;
static boolean isSynthetic(int mod) {
return (mod & SYNTHETIC) != 0;
}
static boolean isMandated(int mod) {
return (mod & MANDATED) != 0;
}
// Note on the FOO_MODIFIERS fields and fooModifiers() methods:
// the sets of modifiers are not guaranteed to be constants
// across time and Java SE releases. Therefore, it would not be
// appropriate to expose an external interface to this information
// that would allow the values to be treated as Java-level
// constants since the values could be constant folded and updates
// to the sets of modifiers missed. Thus, the fooModifiers()
// methods return an unchanging values for a given release, but a
// value that can potentially change over time.
/**
* The Java source modifiers that can be applied to a class.
* @jls 8.1.1 Class Modifiers
*/
private static final int CLASS_MODIFIERS =
Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE |
Modifier.ABSTRACT | Modifier.STATIC | Modifier.FINAL |
Modifier.STRICT;
/**
* The Java source modifiers that can be applied to an interface.
* @jls 9.1.1 Interface Modifiers
*/
private static final int INTERFACE_MODIFIERS =
Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE |
Modifier.ABSTRACT | Modifier.STATIC | Modifier.STRICT;
/**
* The Java source modifiers that can be applied to a constructor.
* @jls 8.8.3 Constructor Modifiers
*/
private static final int CONSTRUCTOR_MODIFIERS =
Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE;
/**
* The Java source modifiers that can be applied to a method.
* @jls 8.4.3 Method Modifiers
*/
private static final int METHOD_MODIFIERS =
Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE |
Modifier.ABSTRACT | Modifier.STATIC | Modifier.FINAL |
Modifier.SYNCHRONIZED | Modifier.NATIVE | Modifier.STRICT;
/**
* The Java source modifiers that can be applied to a field.
* @jls 8.3.1 Field Modifiers
*/
private static final int FIELD_MODIFIERS =
Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE |
Modifier.STATIC | Modifier.FINAL | Modifier.TRANSIENT |
Modifier.VOLATILE;
/**
* The Java source modifiers that can be applied to a method or constructor parameter.
* @jls 8.4.1 Formal Parameters
*/
private static final int PARAMETER_MODIFIERS =
Modifier.FINAL;
static final int ACCESS_MODIFIERS =
Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE;
/**
* Return an {@code int} value OR-ing together the source language
* modifiers that can be applied to a class.
* @return an {@code int} value OR-ing together the source language
* modifiers that can be applied to a class.
*
* @jls 8.1.1 Class Modifiers
* @since 1.7
*/
public static int classModifiers() {
return CLASS_MODIFIERS;
}
/**
* Return an {@code int} value OR-ing together the source language
* modifiers that can be applied to an interface.
* @return an {@code int} value OR-ing together the source language
* modifiers that can be applied to an interface.
*
* @jls 9.1.1 Interface Modifiers
* @since 1.7
*/
public static int interfaceModifiers() {
return INTERFACE_MODIFIERS;
}
/**
* Return an {@code int} value OR-ing together the source language
* modifiers that can be applied to a constructor.
* @return an {@code int} value OR-ing together the source language
* modifiers that can be applied to a constructor.
*
* @jls 8.8.3 Constructor Modifiers
* @since 1.7
*/
public static int constructorModifiers() {
return CONSTRUCTOR_MODIFIERS;
}
/**
* Return an {@code int} value OR-ing together the source language
* modifiers that can be applied to a method.
* @return an {@code int} value OR-ing together the source language
* modifiers that can be applied to a method.
*
* @jls 8.4.3 Method Modifiers
* @since 1.7
*/
public static int methodModifiers() {
return METHOD_MODIFIERS;
}
/**
* Return an {@code int} value OR-ing together the source language
* modifiers that can be applied to a field.
* @return an {@code int} value OR-ing together the source language
* modifiers that can be applied to a field.
*
* @jls 8.3.1 Field Modifiers
* @since 1.7
*/
public static int fieldModifiers() {
return FIELD_MODIFIERS;
}
/**
* Return an {@code int} value OR-ing together the source language
* modifiers that can be applied to a parameter.
* @return an {@code int} value OR-ing together the source language
* modifiers that can be applied to a parameter.
*
* @jls 8.4.1 Formal Parameters
* @since 1.8
*/
public static int parameterModifiers() {
return PARAMETER_MODIFIERS;
}
}
⏎ java/lang/reflect/Modifier.java
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