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package org.bndtools.templating.util;

import java.net.URI;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.osgi.service.metatype.AttributeDefinition;
import org.osgi.service.metatype.ObjectClassDefinition;

public class CompositeOCD extends BaseOCD {

	private final List delegates = new LinkedList<>();

	public CompositeOCD(String name, String description, URI iconUri, ObjectClassDefinition... delegates) {
		super(name, description, iconUri);
		this.delegates.addAll(Arrays.asList(delegates));
	}

	public void addDelegate(ObjectClassDefinition delegate) {
		delegates.add(delegate);
	}

	@Override
	public AttributeDefinition[] getAttributeDefinitions(int filter) {
		final Map ads = new LinkedHashMap<>();

		for (ObjectClassDefinition delegate : delegates) {
			AttributeDefinition[] entryAds = delegate.getAttributeDefinitions(filter);
			if (entryAds != null) {
				for (AttributeDefinition ad : entryAds) {
					if (!ads.containsKey(ad.getID()))
						ads.put(ad.getID(), ad);
				}
			}
		}
		return ads.values()
			.toArray(new AttributeDefinition[0]);
	}

}