CollectionSequence.java

package jetbrains.mps.internal.collections.runtime;

/*Generated by MPS */

import java.util.Collection;
import java.io.Serializable;
import java.util.Collections;
import jetbrains.mps.internal.collections.runtime.impl.NullCollectionSequence;
import java.util.ArrayList;
import java.util.List;
import java.util.Arrays;

public abstract class CollectionSequence<T> extends AbstractCollectionSequence<T> implements ICollectionSequence<T>, Collection<T>, Serializable {
  private static final long serialVersionUID = -5323571231659062625L;
  protected CollectionSequence() {
  }
  @Override
  public ICollectionSequence<T> asUnmodifiable() {
    final Collection<T> unmodifiableCollection = Collections.unmodifiableCollection(getCollection());
    return new CollectionSequence<T>() {
      @Override
      protected Collection<T> getCollection() {
        return unmodifiableCollection;
      }
    };
  }
  @Override
  public ICollectionSequence<T> asSynchronized() {
    final Collection<T> synchronizedCollection = CollectionUtils.synchronizedCollection(getCollection());
    return new CollectionSequence<T>() {
      @Override
      protected Collection<T> getCollection() {
        return synchronizedCollection;
      }
    };
  }
  public static <U> ICollectionSequence<U> fromCollection(final Collection<U> coll) {
    if (AbstractSequence.USE_NULL_SEQUENCE) {
      if (coll == null) {
        return NullCollectionSequence.instance();
      }
    }
    if (coll instanceof ICollectionSequence<?>) {
      return (ICollectionSequence<U>) coll;
    }
    return new CollectionSequence<U>() {
      @Override
      protected Collection<U> getCollection() {
        return coll;
      }
    };
  }
  public static <U> ICollectionSequence<U> fromCollectionWithValues(Collection<U> coll, Iterable<? extends U> it) {
    Collection<U> tmp = coll;
    if (AbstractSequence.USE_NULL_SEQUENCE) {
      if (coll == null && it == null) {
        return NullCollectionSequence.instance();
      } else
      if (coll == null) {
        tmp = new ArrayList<U>();
      } else
      if (it == null) {
        return CollectionSequence.fromCollection(coll);
      }
    }
    if (AbstractSequence.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 ICollectionSequence<?>) {
      return (ICollectionSequence<U>) tmp;
    }
    final Collection<U> myColl = tmp;
    return new CollectionSequence<U>() {
      @Override
      protected Collection<U> getCollection() {
        return myColl;
      }
    };
  }
  public static <U> ICollectionSequence<U> fromCollectionAndArray(Collection<U> coll, U... array) {
    if (AbstractSequence.NULL_ARRAY_IS_SINGLETON) {
      if (array == null) {
        array = (U[]) Sequence.nullSingletonArray();
      }
    }
    if (AbstractSequence.USE_NULL_SEQUENCE) {
      if (coll == null && array == null) {
        return NullCollectionSequence.instance();
      } else
      if (coll == null) {
        coll = new ArrayList<U>();
      } else
      if (array == null) {
        if (coll instanceof ICollectionSequence<?>) {
          return (ICollectionSequence<U>) coll;
        }
        final Collection<U> myColl = coll;
        return new CollectionSequence<U>() {
          @Override
          protected Collection<U> getCollection() {
            return myColl;
          }
        };
      }
    }
    List<U> input = Arrays.asList(array);
    if (AbstractSequence.IGNORE_NULL_VALUES) {
      for (U u : input) {
        if (u != null) {
          coll.add(u);
        }
      }
    } else {
      coll.addAll(input);
    }
    if (coll instanceof ICollectionSequence<?>) {
      return (ICollectionSequence<U>) coll;
    }
    final Collection<U> myColl = coll;
    return new CollectionSequence<U>() {
      @Override
      protected Collection<U> getCollection() {
        return myColl;
      }
    };
  }
}