/*
 * Copyright (c) 2012, grossmann
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 *   names of its contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

package org.jowidgets.impl.model.item;

import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

import org.jowidgets.api.command.IAction;
import org.jowidgets.api.model.item.IActionItemVisibilityAspect;
import org.jowidgets.util.priority.IPriorityValue;
import org.jowidgets.util.priority.LowHighPriority;
import org.jowidgets.util.priority.PrioritizedResultCreator;

final class ActionItemVisibilityAspectComposite {

    private final List<IActionItemVisibilityAspect> allAspects;

    ActionItemVisibilityAspectComposite(final List<IActionItemVisibilityAspect> visibilityAspects) {
        this.allAspects = new LinkedList<IActionItemVisibilityAspect>();
        this.allAspects.addAll(visibilityAspects);
    }

    IPriorityValue<Boolean, LowHighPriority> getVisibility(final IAction action) {
        return getVisibility(action, allAspects);
    }

    private IPriorityValue<Boolean, LowHighPriority> getVisibility(
        final IAction action,
        final List<IActionItemVisibilityAspect> aspects) {
        if (aspects.size() > 0) {
            final PrioritizedResultCreator<Boolean, LowHighPriority> resultCreator;
            resultCreator = new PrioritizedResultCreator<Boolean, LowHighPriority>(LowHighPriority.HIGH);
            final Iterator<IActionItemVisibilityAspect> iterator = aspects.iterator();
            while (iterator.hasNext() && !resultCreator.hasMaxPrio()) {
                resultCreator.addResult(iterator.next().getVisibility(action));
            }
            return resultCreator.getResult();
        }
        else {
            return null;
        }
    }
}