All.java

/*
 * Aphelion
 * Copyright (c) 2013  Joris van der Wel
 * 
 * This file is part of Aphelion
 * 
 * Aphelion is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, version 3 of the License.
 * 
 * Aphelion 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 for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with Aphelion.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * In addition, the following supplemental terms apply, based on section 7 of
 * the GNU Affero General Public License (version 3):
 * a) Preservation of all legal notices and author attributions
 * b) Prohibition of misrepresentation of the origin of this material, and
 * modified versions are required to be marked in reasonable ways as
 * different from the original version (for example by appending a copyright notice).
 * 
 * Linking this library statically or dynamically with other modules is making a
 * combined work based on this library. Thus, the terms and conditions of the
 * GNU Affero General Public License cover the whole combination.
 * 
 * As a special exception, the copyright holders of this library give you 
 * permission to link this library with independent modules to produce an 
 * executable, regardless of the license terms of these independent modules,
 * and to copy and distribute the resulting executable under terms of your 
 * choice, provided that you also meet, for each linked independent module,
 * the terms and conditions of the license of that module. An independent
 * module is a module which is not derived from or based on this library.
 */

package aphelion.shared.event.promise;

import aphelion.shared.event.Workable;
import java.util.Arrays;
import java.util.Collections;

/**
 *
 * @author Joris
 */
public class All extends AbstractPromise
{
        private final Object[] resolveResult;
        private final boolean resolved[];
        private int resolved_count = 0;
        private final boolean rejected[];

        public All(Workable workable, AbstractPromise ... promises)
        {
                super(workable);
                resolveResult = new Object[promises.length];
                resolved = new boolean[promises.length];
                rejected = new boolean[promises.length];
                for (int i = 0; i < promises.length; ++i)
                {
                        promises[i].then(this, i);
                }
        }

        void markListResolve(int index, Object ret)
        {
                if (resolved[index] || rejected[index])
                {
                        throw new IllegalStateException();
                }

                resolved[index] = true;
                resolveResult[index] = ret;
                ++resolved_count;

                // do not fire success if one or more resulted in failure
                if (resolved_count == resolved.length)
                {       
                        this.resolve(Collections.unmodifiableList(Arrays.asList(resolveResult)));
                }
        }

        void markListReject(int index, PromiseException ex)
        {
                if (resolved[index] || rejected[index])
                {
                        throw new IllegalStateException();
                }

                rejected[index] = true;
                
                // todo exception list
        }
}