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/**
 * Copyright 2014 Netflix, Inc.
 * 
 * Licensed 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 rx.joins;

import java.util.ArrayList;
import java.util.List;

import rx.Notification;
import rx.functions.Action0;
import rx.functions.ActionN;

/**
 * Represents an active plan.
 */
public final class ActivePlanN extends ActivePlan0 {
    private final ActionN onNext;
    private final Action0 onCompleted;
    private final List> observers;

    ActivePlanN(List> observers,
            ActionN onNext,
            Action0 onCompleted) {
        this.onNext = onNext;
        this.onCompleted = onCompleted;
        this.observers = new ArrayList>(observers);
        for (JoinObserver1 jo : this.observers) {
        	addJoinObserver(jo);
        }
    }

    @Override
    protected void match() {
    	Object[] notifications = new Object[this.observers.size()];
    	int j = 0;
    	int completedCount = 0;
        for (JoinObserver1 jo : this.observers) {
        	if (jo.queue().isEmpty()) {
        		return;
        	}
        	Notification n = jo.queue().peek();
        	if (n.isOnCompleted()) {
        		completedCount++;
        	}
        	notifications[j] = n.getValue();
        	j++;
        }
        if (completedCount == j) {
        	onCompleted.call();
        } else {
        	dequeue();
        	onNext.call(notifications);
        }
    }

}