prompto.intrinsic.IterableWithCounts Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of Core Show documentation

The newest version!

package prompto.intrinsic;

import java.util.Iterator;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import java.util.stream.StreamSupport;

public interface IterableWithCounts extends Iterable {

	Long getCount();
	default long getNativeCount() {
		return getCount();
	}
	Long getTotalCount();
	default Iterable filter(Predicate predicate) {
		Iterator items = this.iterator();
		return new Iterable() {
			@Override
			public Iterator iterator() {
				return new Iterator() {
					T current;
					@Override
					public boolean hasNext() {
						current = null;
						while(items.hasNext()) {
							current = items.next();
							if(predicate.test(current))
								return true;
						}
						current = null;
						return false;
					}
					
					@Override
					public T next() {
						return current;
					}
				};
			}
			@Override
			public String toString() {
				return StreamSupport.stream(this.spliterator(), false)
						.map(Object::toString)
						.collect(Collectors.toList())
						.toString();
			}
			
		};
	}

	default PromptoList toList() {
		PromptoList result = new PromptoList(false);
		for(T item : this)
			result.add(item);
		return result;
	}

	default PromptoSet toSet() {
		PromptoSet result = new PromptoSet();
		for(T item : this)
			result.add(item);
		return result;
	}
}