Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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 org.jclouds.softlayer.compute.functions; import static com.google.common.base.Preconditions.checkNotNull; import static com.google.common.base.Strings.nullToEmpty; import javax.inject.Inject; import org.jclouds.domain.Location; import org.jclouds.domain.LocationBuilder; import org.jclouds.domain.LocationScope; import org.jclouds.location.suppliers.all.JustProvider; import org.jclouds.softlayer.domain.Address; import org.jclouds.softlayer.domain.Datacenter; import com.google.common.base.Function; import com.google.common.collect.ImmutableMap; import com.google.common.collect.ImmutableSet; import com.google.common.collect.Iterables; /** * Converts an Datacenter into a Location. */ public class DatacenterToLocation implements Function<Datacenter, Location> { private final JustProvider provider; // allow us to lazy discover the provider of a resource @Inject public DatacenterToLocation(JustProvider provider) { this.provider = checkNotNull(provider, "provider"); } @Override public Location apply(Datacenter datacenter) { return new LocationBuilder().scope(LocationScope.ZONE).metadata(ImmutableMap.<String, Object>of()) .description(datacenter.getLongName()).id(Long.toString(datacenter.getId())) .iso3166Codes(createIso3166Codes(datacenter.getLocationAddress())) .parent(Iterables.getOnlyElement(provider.get())).build(); } private Iterable<String> createIso3166Codes(Address address) { if (address == null) return ImmutableSet.<String>of(); final String country = nullToEmpty(address.getCountry()).trim(); if (country.isEmpty()) return ImmutableSet.<String>of(); final String state = nullToEmpty(address.getState()).trim(); if (state.isEmpty()) return ImmutableSet.<String>of(address.getCountry()); return ImmutableSet.<String>of("" + country + "-" + state); } }