/*

 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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 General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package jdk.experimental.bytecode;

import java.util.function.Consumer;

/**

 * Declaration (class, class member, ...) builder.

 *

 * @param <S> the type of symbol representation

 * @param <T> the type of type descriptors representation

 * @param <E> the type of pool entries

 * @param <D> the type of this builder

 */

public class DeclBuilder<S, T, E, D extends DeclBuilder<S, T, E, D>>

        extends AttributeBuilder<S, T, E, D> {

    /**

     * The access flags of the declaration, as bit flags.

     */

    protected int flags;

    AnnotationsBuilder<S, T, E> runtimeInvisibleAnnotations;

    AnnotationsBuilder<S, T, E> runtimeVisibleAnnotations;

    /**

     * Create a declaration builder,

     *

     * @param poolHelper the helper to build the constant pool

     * @param typeHelper the helper to use to manipulate type descriptors

     */

    DeclBuilder(PoolHelper<S, T, E> poolHelper, TypeHelper<S, T> typeHelper) {

        super(poolHelper, typeHelper);

    }

    /**

     * Specify the class file flags for this declaration.

     *

     * @param flags the flags as {@code Flag} objects

     * @return this builder, for chained calls

     */

    public D withFlags(Flag... flags) {

        for (Flag f : flags) {

            this.flags |= f.flag;

        }

        return thisBuilder();

    }

    /**

     * Specify, via bits, the class file flags for this declaration.

     *

     * @param flags the flags as bit settings

     * @return this builder, for chained calls

     */

    public D withFlags(int flags) {

        withFlags(Flag.parse(flags));

        return thisBuilder();

    }

    public D withAnnotation(AnnotationsBuilder.Kind kind, T annoType) {

        getAnnotations(kind).withAnnotation(annoType, null);

        return thisBuilder();

    }

    public D withAnnotation(AnnotationsBuilder.Kind kind, T annoType, Consumer<? super AnnotationsBuilder<S, T, E>.AnnotationElementBuilder> annotations) {

        getAnnotations(kind).withAnnotation(annoType, annotations);

        return thisBuilder();

    }

    private AnnotationsBuilder<S, T, E> getAnnotations(AnnotationsBuilder.Kind kind) {

        switch (kind) {

            case RUNTIME_INVISIBLE:

                if (runtimeInvisibleAnnotations == null) {

                    runtimeInvisibleAnnotations = new AnnotationsBuilder<>(poolHelper, typeHelper);

                }

                return runtimeInvisibleAnnotations;

            case RUNTIME_VISIBLE:

                if (runtimeVisibleAnnotations == null) {

                    runtimeVisibleAnnotations = new AnnotationsBuilder<>(poolHelper, typeHelper);

                }

                return runtimeVisibleAnnotations;

        }

        throw new IllegalStateException();

    }

    void addAnnotations() {

        if (runtimeVisibleAnnotations != null) {

            withAttribute("RuntimeVisibleAnnotations", runtimeVisibleAnnotations.build());

        }

        if (runtimeInvisibleAnnotations != null) {

            withAttribute("RuntimeInvisibleAnnotations", runtimeVisibleAnnotations.build());

        }

    }

}