MultiValueMachineTag.java

/*
 * Copyright (c) 2012-2015 iWave Software LLC
 * All Rights Reserved
 */
package com.emc.sa.machinetags;

import java.util.Arrays;
import java.util.List;

public abstract class MultiValueMachineTag {

    public static final String NAMESPACE = "isa";

    protected final MachineTagsCollection tags = new MachineTagsCollection();

    public MultiValueMachineTag(MachineTag... machineTags) {
        tags.addAll(Arrays.asList(machineTags));
    }

    public MachineTagsCollection getTags() {
        return tags;
    }

    public MachineTag getTag(String key) {
        MachineTagsCollection candidates = tags.findAll(getNamespace(), key);
        if (candidates.size() > 1) {
            throw new IllegalStateException("Exactly one tag with the key [" + key + "] is allowed.");
        }
        return candidates.get(0);
    }

    public abstract String getNamespace();

    public abstract List<String> getRelatedTags();

    public Integer index() {
        return tags.get(0).index;
    }
}