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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
package org.apache.bcel.classfile;

import org.apache.bcel.Const;

/*>>>
import org.checkerframework.checker.initialization.qual.UnknownInitialization;
*/

/**
 * Super class for all objects that have modifiers like private, final, ... I.e. classes, fields, and methods.
 *
 * @version $Id$
 */
public abstract class AccessFlags {

    /**
     * @deprecated (since 6.0) will be made private; do not access directly, use getter/setter
     */
    @java.lang.Deprecated
    protected int access_flags; // TODO not used externally at present

    public AccessFlags() {
    }

    /**
     * @param a
     *            inital access flags
     */
    public AccessFlags(final int a) {
        access_flags = a;
    }

    /**
     * @return Access flags of the object aka. "modifiers".
     */
    public final int getAccessFlags() {
        return access_flags;
    }

    /**
     * @return Access flags of the object aka. "modifiers".
     */
    public final int getModifiers() {
        return access_flags;
    }

    /**
     * Set access flags aka "modifiers".
     *
     * @param access_flags
     *            Access flags of the object.
     */
    public final void setAccessFlags(final int access_flags) {
        this.access_flags = access_flags;
    }

    /**
     * Set access flags aka "modifiers".
     *
     * @param access_flags
     *            Access flags of the object.
     */
    public final void setModifiers(final int access_flags) {
        setAccessFlags(access_flags);
    }

    private void setFlag(final int flag, final boolean set) {
        if ((access_flags & flag) != 0) { // Flag is set already
            if (!set) {
                access_flags ^= flag;
            }
        } else { // Flag not set
            if (set) {
                access_flags |= flag;
            }
        }
    }

    public final void isPublic(final boolean flag) {
        setFlag(Const.ACC_PUBLIC, flag);
    }

    public final boolean isPublic(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_PUBLIC) != 0;
    }

    public final void isPrivate(final boolean flag) {
        setFlag(Const.ACC_PRIVATE, flag);
    }

    public final boolean isPrivate(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_PRIVATE) != 0;
    }

    public final void isProtected(final boolean flag) {
        setFlag(Const.ACC_PROTECTED, flag);
    }

    public final boolean isProtected(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_PROTECTED) != 0;
    }

    public final void isStatic(final boolean flag) {
        setFlag(Const.ACC_STATIC, flag);
    }

    public final boolean isStatic(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_STATIC) != 0;
    }

    public final void isFinal(final boolean flag) {
        setFlag(Const.ACC_FINAL, flag);
    }

    public final boolean isFinal(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_FINAL) != 0;
    }

    public final void isSynchronized(final boolean flag) {
        setFlag(Const.ACC_SYNCHRONIZED, flag);
    }

    public final boolean isSynchronized(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_SYNCHRONIZED) != 0;
    }

    public final void isVolatile(final boolean flag) {
        setFlag(Const.ACC_VOLATILE, flag);
    }

    public final boolean isVolatile(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_VOLATILE) != 0;
    }

    public final void isTransient(final boolean flag) {
        setFlag(Const.ACC_TRANSIENT, flag);
    }

    public final boolean isTransient(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_TRANSIENT) != 0;
    }

    public final void isNative(final boolean flag) {
        setFlag(Const.ACC_NATIVE, flag);
    }

    public final boolean isNative(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_NATIVE) != 0;
    }

    public final void isInterface(final boolean flag) {
        setFlag(Const.ACC_INTERFACE, flag);
    }

    public final boolean isInterface(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_INTERFACE) != 0;
    }

    public final void isAbstract(final boolean flag) {
        setFlag(Const.ACC_ABSTRACT, flag);
    }

    public final boolean isAbstract(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_ABSTRACT) != 0;
    }

    public final void isStrictfp(final boolean flag) {
        setFlag(Const.ACC_STRICT, flag);
    }

    public final boolean isStrictfp(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_STRICT) != 0;
    }

    public final void isSynthetic(final boolean flag) {
        setFlag(Const.ACC_SYNTHETIC, flag);
    }

    public final boolean isSynthetic(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_SYNTHETIC) != 0;
    }

    public final void isAnnotation(final boolean flag) {
        setFlag(Const.ACC_ANNOTATION, flag);
    }

    public final boolean isAnnotation(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_ANNOTATION) != 0;
    }

    public final void isEnum(final boolean flag) {
        setFlag(Const.ACC_ENUM, flag);
    }

    public final boolean isEnum(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_ENUM) != 0;
    }

    public final void isVarArgs(final boolean flag) {
        setFlag(Const.ACC_VARARGS, flag);
    }

    public final boolean isVarArgs(/*>>>@UnknownInitialization(AccessFlags.class) AccessFlags this*/) {
        return (access_flags & Const.ACC_VARARGS) != 0;
    }
}