clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/HierarchicalGroupVisitingAdapter.java


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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
//
package com.yahoo.vespa.clustercontroller.core;

import com.yahoo.vdslib.distribution.Distribution;
import com.yahoo.vdslib.distribution.GroupVisitor;

/**
 * Exposes {@link Distribution} as a {@link HierarchicalGroupVisiting}.
 *
 * @author hakon
 */
public class HierarchicalGroupVisitingAdapter implements HierarchicalGroupVisiting {
    private final Distribution distribution;

    public HierarchicalGroupVisitingAdapter(Distribution distribution) {
        this.distribution = distribution;
    }

    @Override
    public boolean isHierarchical() {
        return !distribution.getRootGroup().isLeafGroup();
    }

    @Override
    public void visit(GroupVisitor visitor) {
        if (isHierarchical()) {
            distribution.visitGroups(group -> {
                if (group.isLeafGroup()) {
                    return visitor.visitGroup(group);
                }

                return true;
            });
        }
    }
}