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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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/*
 * Copyright (C) 2007 Júlio Vilmar Gesser.
 * 
 * This file is part of Java 1.5 parser and Abstract Syntax Tree.
 *
 * Java 1.5 parser and Abstract Syntax Tree is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Java 1.5 parser and Abstract Syntax Tree is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Java 1.5 parser and Abstract Syntax Tree.  If not, see .
 */
package org.checkerframework.stubparser.ast.body;

import java.lang.reflect.Modifier;

/**
 * Class to hold modifiers.

 * The modifier constants declared here holds equivalent values to
 * {@link Modifier} constants.
 */
public final class ModifierSet {

    /* Definitions of the bits in the modifiers field.  */

    public static final int PUBLIC = Modifier.PUBLIC;

    public static final int PRIVATE = Modifier.PRIVATE;

    public static final int PROTECTED = Modifier.PROTECTED;

    public static final int STATIC = Modifier.STATIC;

    public static final int FINAL = Modifier.FINAL;

    public static final int SYNCHRONIZED = Modifier.SYNCHRONIZED;

    public static final int VOLATILE = Modifier.VOLATILE;

    public static final int TRANSIENT = Modifier.TRANSIENT;

    public static final int NATIVE = Modifier.NATIVE;

    public static final int ABSTRACT = Modifier.ABSTRACT;

    public static final int STRICTFP = Modifier.STRICT;

    /**
     * Adds the given modifier.
     */
    public static int addModifier(int modifiers, int mod) {
        return modifiers | mod;
    }

    public static boolean hasModifier(int modifiers, int modifier) {
        return (modifiers & modifier) != 0;
    }

    public static boolean isAbstract(int modifiers) {
        return (modifiers & ABSTRACT) != 0;
    }

    public static boolean isFinal(int modifiers) {
        return (modifiers & FINAL) != 0;
    }

    public static boolean isNative(int modifiers) {
        return (modifiers & NATIVE) != 0;
    }

    public static boolean isPrivate(int modifiers) {
        return (modifiers & PRIVATE) != 0;
    }

    public static boolean isProtected(int modifiers) {
        return (modifiers & PROTECTED) != 0;
    }

    /**
     * A set of accessors that indicate whether the specified modifier is in the
     * set.
     */

    public static boolean isPublic(int modifiers) {
        return (modifiers & PUBLIC) != 0;
    }

    public static boolean isStatic(int modifiers) {
        return (modifiers & STATIC) != 0;
    }

    public static boolean isStrictfp(int modifiers) {
        return (modifiers & STRICTFP) != 0;
    }

    public static boolean isSynchronized(int modifiers) {
        return (modifiers & SYNCHRONIZED) != 0;
    }

    public static boolean isTransient(int modifiers) {
        return (modifiers & TRANSIENT) != 0;
    }

    public static boolean isVolatile(int modifiers) {
        return (modifiers & VOLATILE) != 0;
    }

    /**
     * Removes the given modifier.
     */
    public static int removeModifier(int modifiers, int mod) {
        return modifiers & ~mod;
    }

    private ModifierSet() {
    }
}