org.jclouds.codec.ToProvider.java Source code

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Here is the source code for org.jclouds.codec.ToProvider.java

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/*
 * 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.codec;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Maps;
import com.google.common.reflect.TypeToken;
import com.google.inject.Module;
import org.jclouds.View;
import org.jclouds.representations.ProviderMetadata;
import org.jclouds.javax.annotation.Nullable;

import java.util.Map;
import java.util.Properties;

import static com.google.common.collect.Iterables.transform;

public enum ToProvider implements Function<org.jclouds.providers.ProviderMetadata, ProviderMetadata> {

    INSTANCE;

    public ProviderMetadata apply(@Nullable org.jclouds.providers.ProviderMetadata input) {
        if (input == null) {
            return null;
        }

        return ProviderMetadata.builder().id(input.getId()).name(input.getName()).endpoint(input.getEndpoint())
                .console(input.getConsole().orNull()).homePage(input.getHomepage().orNull())
                .linkedServices(input.getLinkedServices()).iso3166Codes(input.getIso3166Codes())
                .identityName(input.getApiMetadata().getIdentityName())
                .credentialName(input.getApiMetadata().getCredentialName().orNull())
                .endpointName(input.getApiMetadata().getEndpointName())
                .documentation(input.getApiMetadata().getDocumentation().toString())
                .defaultProperties(
                        fromProperties(input.getApiMetadata().getDefaultProperties(), input.getDefaultProperties()))

                .defaultModules(
                        ImmutableSet.<String>builder().addAll(transform(input.getApiMetadata().getDefaultModules(),
                                new Function<Class<? extends Module>, String>() {
                                    @Override
                                    public String apply(@Nullable Class<? extends Module> input) {
                                        return input.getName();
                                    }
                                })).build())

                .views(ImmutableSet.<String>builder().addAll(transform(input.getApiMetadata().getViews(),
                        new Function<TypeToken<? extends View>, String>() {
                            @Override
                            public String apply(@Nullable TypeToken<? extends View> input) {
                                return input.getRawType().getName();
                            }
                        })).build())

                .build();
    }

    /**
     * Merges multiple {@link Properties} into a {@link Map}.
     * In case of duplicate keys, the latest value will be kept.
     * This utility is mostly needed because the map builder can't handle duplicates.
     * @param properties
     * @return
     */
    private static Map<String, String> fromProperties(Properties... properties) {
        Map<String, String> map = Maps.newHashMap();
        for (Properties p : properties) {
            map.putAll(Maps.fromProperties(p));
        }
        return map;
    }
}