QueueSequence.java

package jetbrains.mps.internal.collections.runtime;

/*Generated by MPS */

import java.util.Queue;
import java.io.Serializable;
import jetbrains.mps.internal.collections.runtime.impl.NullQueueSequence;
import java.util.LinkedList;
import java.util.Collection;
import java.util.List;
import java.util.Arrays;

public class QueueSequence<T> extends AbstractQueueSequence<T> implements Queue<T>, IQueueSequence<T>, Serializable {
  private static final long serialVersionUID = 4639602987002419231L;
  protected QueueSequence(Queue<T> queue) {
    super(queue);
  }
  public static <U> IQueueSequence<U> fromQueue(Queue<U> queue) {
    if (Sequence.USE_NULL_SEQUENCE) {
      if (queue == null) {
        return NullQueueSequence.instance();
      }
    }
    if (queue instanceof IQueueSequence) {
      return (IQueueSequence<U>) queue;
    }
    return new QueueSequence<U>(queue);
  }
  public static <U> IQueueSequence<U> fromIterable(Iterable<U> it) {
    if (Sequence.USE_NULL_SEQUENCE) {
      if (it == null) {
        return NullQueueSequence.instance();
      }
    }
    if (it instanceof IQueueSequence) {
      return (IQueueSequence<U>) it;
    }
    Queue<U> queue = new LinkedList<U>();
    if (Sequence.IGNORE_NULL_VALUES) {
      for (U u : it) {
        if (u != null) {
          queue.add(u);
        }
      }
    } else
    if (it instanceof Collection) {
      queue.addAll((Collection<? extends U>) it);
    } else {
      for (U u : it) {
        queue.add(u);
      }
    }
    return new QueueSequence<U>(queue);
  }
  public static <U> IQueueSequence<U> fromQueueAndArray(Queue<U> queue, U... array) {
    if (Sequence.NULL_ARRAY_IS_SINGLETON) {
      if (array == null) {
        array = (U[]) Sequence.nullSingletonArray();
      }
    }
    if (Sequence.USE_NULL_SEQUENCE) {
      if (queue == null && array == null) {
        return NullQueueSequence.instance();
      } else
      if (queue == null) {
        queue = new LinkedList<U>();
      } else
      if (array == null) {
        if (queue instanceof IQueueSequence) {
          return (IQueueSequence<U>) queue;
        }
        return new QueueSequence<U>(queue);
      }
    }
    List<U> input = Arrays.asList(array);
    if (Sequence.IGNORE_NULL_VALUES) {
      for (U u : input) {
        if (u != null) {
          queue.add(u);
        }
      }
    } else {
      queue.addAll(input);
    }
    if (queue instanceof IQueueSequence) {
      return (IQueueSequence<U>) queue;
    }
    return new QueueSequence<U>(queue);
  }
  public static <U> IQueueSequence<U> fromQueueWithValues(Queue<U> queue, Iterable<? extends U> it) {
    Queue<U> tmp = queue;
    if (Sequence.USE_NULL_SEQUENCE) {
      if (queue == null && it == null) {
        return NullQueueSequence.instance();
      } else
      if (queue == null) {
        tmp = new LinkedList<U>();
      } else
      if (it == null) {
        return QueueSequence.fromQueue(queue);
      }
    }
    if (Sequence.IGNORE_NULL_VALUES) {
      for (U u : it) {
        if (u != null) {
          tmp.add(u);
        }
      }
    } else
    if (it instanceof Collection) {
      tmp.addAll((Collection<? extends U>) it);
    } else {
      for (U u : it) {
        tmp.add(u);
      }
    }
    if (tmp instanceof IQueueSequence) {
      return (IQueueSequence<U>) tmp;
    }
    return new QueueSequence<U>(tmp);
  }
}