javacc.parser.ast.body.ModifierSet Maven / Gradle / Ivy

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package javacc.parser.ast.body;

import javacc.parser.ParseException;
import javacc.parser.Token;

/**
 * Class to hold modifiers.
 */
public final class ModifierSet {

    private ModifierSet() {
    }

    /* Definitions of the bits in the modifiers field.  */
    public static final int PUBLIC = 0x0001;

    public static final int PROTECTED = 0x0002;

    public static final int PRIVATE = 0x0004;

    public static final int ABSTRACT = 0x0008;

    public static final int STATIC = 0x0010;

    public static final int FINAL = 0x0020;

    public static final int SYNCHRONIZED = 0x0040;

    public static final int NATIVE = 0x0080;

    public static final int TRANSIENT = 0x0100;

    public static final int VOLATILE = 0x0200;

    public static final int STRICTFP = 0x1000;

    /** 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 isProtected(int modifiers) {
        return (modifiers & PROTECTED) != 0;
    }

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

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

    /**
     * Adds the given modifier.
     */
    public static int addModifier(int modifiers, int mod, Token token) throws ParseException {
        if ((modifiers & mod) != 0) {
            throw new ParseException(token, "Duplicated modifier");
        }
        return modifiers |= mod;
    }
}