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/*
 * Copyright 2014 by Cloudsoft Corporation Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package brooklyn.networking.sdn;

import java.util.Collection;
import java.util.Collections;
import java.util.List;

import javax.annotation.Nullable;

import brooklyn.config.ConfigKey;
import brooklyn.entity.Entity;
import brooklyn.entity.basic.ConfigKeys;
import brooklyn.event.AttributeSensor;
import brooklyn.event.basic.Sensors;

import com.google.common.base.Preconditions;
import com.google.common.base.Predicate;
import com.google.common.reflect.TypeToken;

/**
 * SDN attributes and configuration keys.
 */
public class SdnAttributes {

    public static final ConfigKey> NETWORK_LIST = ConfigKeys.newConfigKey(
            new TypeToken>() { }, "network.list", "Collection of extra networks to create for an entity", Collections.emptyList());

    public static final ConfigKey SDN_ENABLE = ConfigKeys.newBooleanConfigKey("sdn.enable", "Enable Sofware-Defined Networking", Boolean.FALSE);
    public static final ConfigKey SDN_DEBUG = ConfigKeys.newBooleanConfigKey("sdn.debug", "Enable SDN debugging utility installation", Boolean.FALSE);

    public static final AttributeSensor> ATTACHED_NETWORKS = Sensors.newSensor(new TypeToken>() { },
            "sdn.networks.attached", "The list of networks that an entity is attached to");

    public static final Predicate attachedToNetwork(String networkId) {
        Preconditions.checkNotNull(networkId, "networkId");
        return new AttachedToNetworkPredicate(networkId);
    }

    public static class AttachedToNetworkPredicate implements Predicate {

        private final String id;

        public AttachedToNetworkPredicate(String id) {
            this.id = Preconditions.checkNotNull(id, "id");
        }

        @Override
        public boolean apply(@Nullable Entity input) {
            List networks = input.getAttribute(SdnAttributes.ATTACHED_NETWORKS);
            if (networks != null) {
                return networks.contains(id);
            } else {
                return false;
            }
        }
    };

}