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/*******************************************************************************
 * 	Copyright 2016 ContainX and OpenStack4j                                          
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 * 	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                                                                   
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 * 	    http://www.apache.org/licenses/LICENSE-2.0                                   
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 * 	distributed under the License is distributed on an "AS IS" BASIS, WITHOUT        
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 * 	the License.                                                                     
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/******************************************************************************* 	                                                                                 
 *  Huawei has modified this source file.
 * 	Copyright 2018 Huawei Technologies Co.,Ltd.                                         
 * 	                                                                                 
 * 	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                                                                   
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 * 	    http://www.apache.org/licenses/LICENSE-2.0                                   
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 * 	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 com.huawei.openstack4j.openstack.dns.v2.internal;

import static com.google.common.base.Preconditions.*;
import static com.huawei.openstack4j.core.transport.ClientConstants.*;

import java.util.HashMap;
import java.util.List;

import com.google.common.collect.Maps;

import com.huawei.openstack4j.api.dns.v2.ZoneService;
import com.huawei.openstack4j.model.dns.v2.Nameserver;
import com.huawei.openstack4j.model.dns.v2.Zone;
import com.huawei.openstack4j.model.dns.v2.ZoneType;
import com.huawei.openstack4j.openstack.dns.v2.domain.DesignateNameserver;
import com.huawei.openstack4j.openstack.dns.v2.domain.DesignateZone;

public class ZoneServiceImpl extends BaseDNSServices implements ZoneService {

	@Override
	public Zone get(String zoneId) {
		checkNotNull(zoneId, "The zone id is Null.");
		return get(DesignateZone.class, PATH_ZONES, "/", zoneId).execute();
	}

	@Override
	public Zone delete(String zoneId) {
		checkNotNull(zoneId, "The zone id is Null.");
		return delete(DesignateZone.class, PATH_ZONES, "/", zoneId).execute();
	}

	@Override
	public List listNameservers(String zoneId) {
		checkNotNull(zoneId, "The zone id is Null.");
		return get(DesignateNameserver.Nameservers.class, PATH_ZONES, "/", zoneId, PATH_NAMESERVERS).execute()
				.getList();
	}

	@Override
	public Zone create(Zone zone) {
		checkNotNull(zone, "The Zone record is Null.");
		checkNotNull(zone.getName(), "The zone record's name properity is Null.");
		checkArgument(checkNameLength(zone.getName()), errorMessageForNameLength(zone.getName()));
		checkArgument(zone.getDescription() != null ? zone.getDescription().length() <= 255 : true,
				"The description's length is longer than 255");
		checkArgument(zone.getTTL() != null ? zone.getTTL() >= 300 && zone.getTTL() <= 2147483647 : true,
				"TTL value shold equal or bigger than 300, and equal or less than 2147483647");
		checkArgument(zone.getType() == ZoneType.PRIVATE ? ((DesignateZone) zone).getRouter() != null : true,
				"The router should not be empty in the private zone");
		return post(DesignateZone.class, uri(PATH_ZONES)).entity(zone).execute();
	}

	@Override
	public Zone create(String name, String email) {
		return create(DesignateZone.builder().name(name).email(email).build());
	}

	private boolean checkNameLength(String name) {
		if (name.endsWith(".")) {
			if (name.length() <= 254)
				return true;
		} else {
			if (name.length() <= 253)
				return true;
		}
		return false;
	}

	private String errorMessageForNameLength(String name) {
		if (name.endsWith(".")) {
			if (name.length() > 254)
				return "The name end with dot, its length should not longer than 254";
		} else {
			if (name.length() > 253)
				return "The name doesn't end with dot, its length should not longer than 253";
		}
		return "";
	}

	@Override
	public List list() {
		return get(DesignateZone.Zones.class, uri(PATH_ZONES)).execute().getList();
	}

	@Override
	public List list(ZoneType type, String marker, Integer limit) {
		Invocation invocation = get(DesignateZone.Zones.class, uri(PATH_ZONES));
		invocation.param("type", type == null ? null : type.name().toLowerCase());
		invocation.param("marker", marker);
		invocation.param("limit", limit);
		return invocation.execute().getList();
	}

	@Override
	public DesignateZone.Router associateRouter(String zoneId, DesignateZone.Router router) {
		verifyParameters(zoneId, router);
		HashMap entity = Maps.newHashMap();
		entity.put("router", router);
		return post(DesignateZone.Router.class, uri(PATH_ZONES), "/", zoneId, PATH_ASSOCIATE).entity(entity).execute();
	}

	@Override
	public DesignateZone.Router disassociateRouter(String zoneId, DesignateZone.Router router) {
		verifyParameters(zoneId, router);
		HashMap entity = Maps.newHashMap();
		entity.put("router", router);
		return post(DesignateZone.Router.class, uri(PATH_ZONES), "/", zoneId, PATH_DISASSOCIATE).entity(entity)
				.execute();
	}

	private void verifyParameters(String zoneId, DesignateZone.Router router) {
		checkNotNull(zoneId, "The zone id is Null.");
		checkNotNull(router, "The router is Null.");
		checkNotNull(router.getId(), "The router's id is Null.");
		checkNotNull(router.getRegion(), "The router's region is Null.");
	}

}




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