/**

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

 *

 * Copyright 2013-2014 Oracle and/or its affiliates. All rights reserved.

 *

 * Oracle and Java are registered trademarks of Oracle and/or its affiliates.

 * Other names may be trademarks of their respective owners.

 *

 * The contents of this file are subject to the terms of either the GNU

 * General Public License Version 2 only ("GPL") or the Common

 * Development and Distribution License("CDDL") (collectively, the

 * "License"). You may not use this file except in compliance with the

 * License. You can obtain a copy of the License at

 * http://www.netbeans.org/cddl-gplv2.html

 * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

 * specific language governing permissions and limitations under the

 * License.  When distributing the software, include this License Header

 * Notice in each file and include the License file at

 * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the GPL Version 2 section of the License file that

 * accompanied this code. If applicable, add the following below the

 * License Header, with the fields enclosed by brackets [] replaced by

 * your own identifying information:

 * "Portions Copyrighted [year] [name of copyright owner]"

 *

 * Contributor(s):

 *

 * The Original Software is NetBeans. The Initial Developer of the Original

 * Software is Oracle. Portions Copyright 2013-2014 Oracle. All Rights Reserved.

 *

 * If you wish your version of this file to be governed by only the CDDL

 * or only the GPL Version 2, indicate your decision by adding

 * "[Contributor] elects to include this software in this distribution

 * under the [CDDL or GPL Version 2] license." If you do not indicate a

 * single choice of license, a recipient has the option to distribute

 * your version of this file under either the CDDL, the GPL Version 2 or

 * to extend the choice of license to its licensees as provided above.

 * However, if you add GPL Version 2 code and therefore, elected the GPL

 * Version 2 license, then the option applies only if the new code is

 * made subject to such option by the copyright holder.

 */

package org.netbeans.html.context.impl;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import net.java.html.BrwsrCtx;

/** Implementation detail. Holds list of technologies for particular

 * {@link BrwsrCtx}.

 *

 * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>

 */

public final class CtxImpl {

    private final List<Bind<?>> techs;

    public CtxImpl() {

        techs = new ArrayList<Bind<?>>();

    }

    private CtxImpl(List<Bind<?>> techs) {

        this.techs = techs;

    }

    public static <Tech> Tech find(BrwsrCtx context, Class<Tech> technology) {

        CtxImpl impl = CtxAccssr.getDefault().find(context);

        for (Bind<?> bind : impl.techs) {

            if (technology == bind.clazz) {

                return technology.cast(bind.impl);

            }

        }

        return null;

    }

    public BrwsrCtx build() {

        Collections.sort(techs);

        CtxImpl impl = new CtxImpl(Collections.unmodifiableList(techs));

        return CtxAccssr.getDefault().newContext(impl);

    }

    public <Tech> void register(Class<Tech> type, Tech impl, int priority) {

        techs.add(new Bind<Tech>(type, impl, priority));

    }

    private static final class Bind<Tech> implements Comparable<Bind<?>> {

        private final Class<Tech> clazz;

        private final Tech impl;

        private final int priority;

        public Bind(Class<Tech> clazz, Tech impl, int priority) {

            this.clazz = clazz;

            this.impl = impl;

            this.priority = priority;

        }

        @Override

        public int compareTo(Bind<?> o) {

            if (priority != o.priority) {

                return priority - o.priority;

            }

            return clazz.getName().compareTo(o.clazz.getName());

        }

        @Override

        public String toString() {

            return "Bind{" + "clazz=" + clazz + "@" + clazz.getClassLoader() + ", impl=" + impl + ", priority=" + priority + '}';

        }

    }

}