org.jclouds.chef.predicates.CookbookVersionPredicates.java Source code

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Here is the source code for org.jclouds.chef.predicates.CookbookVersionPredicates.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.chef.predicates;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.Iterables.any;
import static com.google.common.collect.Iterables.get;

import org.jclouds.chef.domain.CookbookVersion;
import org.jclouds.chef.domain.Resource;

import com.google.common.base.Predicate;
import com.google.common.base.Splitter;
import com.google.common.collect.LinkedListMultimap;
import com.google.common.collect.Multimap;

/**
 * Container for cookbook filters (predicates).
 * 
 * This class has static methods that create customized predicates to use with
 * {@link org.jclouds.chef.ChefService}.
 */
public class CookbookVersionPredicates {
    /**
     * @see #containsRecipes
     */
    public static Predicate<CookbookVersion> containsRecipe(String recipe) {
        return containsRecipes(checkNotNull(recipe, "recipe must be defined"));
    }

    /**
     * Note that the default recipe of a cookbook is its name. Otherwise, you
     * prefix the recipe with the name of the cookbook. ex. {@code apache2} will
     * be the default recipe where {@code apache2::mod_proxy} is a specific one
     * in the cookbook.
     * 
     * @param recipes
     *           names of the recipes.
     * @return true if the cookbook version contains a recipe in the list.
     */
    public static Predicate<CookbookVersion> containsRecipes(String... recipes) {
        checkNotNull(recipes, "recipes must be defined");
        final Multimap<String, String> search = LinkedListMultimap.create();
        for (String recipe : recipes) {
            if (recipe.indexOf("::") != -1) {
                Iterable<String> nameRecipe = Splitter.on("::").split(recipe);
                search.put(get(nameRecipe, 0), get(nameRecipe, 1) + ".rb");
            } else {
                search.put(recipe, "default.rb");
            }
        }
        return new Predicate<CookbookVersion>() {
            @Override
            public boolean apply(final CookbookVersion cookbookVersion) {
                return search.containsKey(cookbookVersion.getCookbookName())
                        && any(search.get(cookbookVersion.getCookbookName()), new Predicate<String>() {

                            @Override
                            public boolean apply(final String recipeName) {
                                return any(cookbookVersion.getRecipes(), new Predicate<Resource>() {

                                    @Override
                                    public boolean apply(Resource resource) {
                                        return resource.getName().equals(recipeName);
                                    }

                                });
                            }

                        });
            }

            @Override
            public String toString() {
                return "containsRecipes(" + search + ")";
            }
        };
    }
}