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Link Intersystems Commons Graph (lis-commons-graph) is a collection of reusable software components that provide support for graph and tree related programming tasks, such as models and search algorithms.

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package com.link_intersystems.graph.tree;

import java.util.Iterator;
import java.util.stream.Stream;

/**
 * A {@link TreeModel} that expands parents that are {@link Iterator}s or {@link Iterable}s.
 *
 * @author René Link {@literal }
 */
public class IterableTreeModel implements TreeModel {

    @Override
    public Stream getChildren(T parent) {
        if (parent instanceof Iterable) {
            return Iterators.toStream(((Iterable) parent).iterator());
        }

        if (parent instanceof Iterator) {
            return Iterators.toStream((Iterator) parent);
        }

        return Stream.empty();
    }
}