org.jclouds.cloudstack.predicates.OSCategoryIn.java Source code

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Here is the source code for org.jclouds.cloudstack.predicates.OSCategoryIn.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.cloudstack.predicates;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.Map;
import java.util.Set;

import javax.inject.Inject;
import javax.inject.Singleton;

import org.jclouds.cloudstack.CloudStackClient;
import org.jclouds.cloudstack.domain.OSType;
import org.jclouds.cloudstack.domain.Template;

import com.google.common.base.Function;
import com.google.common.base.Predicate;
import com.google.common.base.Predicates;
import com.google.common.base.Supplier;
import com.google.common.base.Suppliers;
import com.google.common.collect.Maps;

/**
 * 
 * 
 * @author Adrian Cole
 */
@Singleton
public class OSCategoryIn implements Function<Set<String>, Predicate<Template>> {
    private final Supplier<Map<String, String>> categoriesSupplier;
    private final Supplier<Set<OSType>> osTypesSupplier;

    @Inject
    public OSCategoryIn(CloudStackClient client) {
        this(Suppliers.ofInstance(checkNotNull(client, "client").getGuestOSClient().listOSCategories()),
                Suppliers.ofInstance(client.getGuestOSClient().listOSTypes()));
    }

    public OSCategoryIn(Supplier<Map<String, String>> categoriesSupplier, Supplier<Set<OSType>> osTypesSupplier) {
        this.categoriesSupplier = checkNotNull(categoriesSupplier, "categoriesSupplier");
        this.osTypesSupplier = checkNotNull(osTypesSupplier, "osTypesSupplier");
    }

    @Override
    public Predicate<Template> apply(final Set<String> acceptableCategories) {
        final Map<String, String> categories = categoriesSupplier.get();
        final Set<String> acceptableOSTypeIds = Maps.filterValues(
                Maps.transformValues(Maps.uniqueIndex(osTypesSupplier.get(), new Function<OSType, String>() {

                    @Override
                    public String apply(OSType input) {
                        return input.getId();
                    }

                }), new Function<OSType, String>() {

                    @Override
                    public String apply(OSType input) {
                        return categories.get(input.getOSCategoryId());
                    }

                }), Predicates.in(acceptableCategories)).keySet();
        return new Predicate<Template>() {

            @Override
            public boolean apply(Template input) {
                return Predicates.in(acceptableOSTypeIds).apply(input.getOSTypeId());
            }

            @Override
            public String toString() {
                return "OSCategoryIn(" + acceptableCategories + ")";
            }
        };
    }
}