org.jclouds.vcloud.functions.OrgNameCatalogNameItemNameToEndpoint.java Source code

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Here is the source code for org.jclouds.vcloud.functions.OrgNameCatalogNameItemNameToEndpoint.java

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/**
 *
 * Copyright (C) 2010 Cloud Conscious, LLC. <info@cloudconscious.com>
 *
 * ====================================================================
 * 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
 *
 * 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.vcloud.functions;

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

import java.net.URI;
import java.util.Map;
import java.util.NoSuchElementException;

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

import org.jclouds.vcloud.endpoints.Catalog;
import org.jclouds.vcloud.endpoints.Org;

import com.google.common.base.Function;
import com.google.common.base.Supplier;
import com.google.common.collect.Iterables;

/**
 * 
 * @author Adrian Cole
 */
@Singleton
public class OrgNameCatalogNameItemNameToEndpoint implements Function<Object, URI> {
    private final Supplier<Map<String, Map<String, ? extends org.jclouds.vcloud.domain.Catalog>>> orgCatalogMap;
    private final String defaultOrg;
    private final String defaultCatalog;

    @Inject
    public OrgNameCatalogNameItemNameToEndpoint(
            Supplier<Map<String, Map<String, ? extends org.jclouds.vcloud.domain.Catalog>>> orgCatalogMap,
            @Org String defaultOrg, @Catalog String defaultCatalog) {
        this.orgCatalogMap = orgCatalogMap;
        this.defaultOrg = defaultOrg;
        this.defaultCatalog = defaultCatalog;
    }

    @SuppressWarnings("unchecked")
    public URI apply(Object from) {
        Iterable<Object> orgCatalog = (Iterable<Object>) checkNotNull(from, "args");
        Object org = Iterables.get(orgCatalog, 0);
        Object catalog = Iterables.get(orgCatalog, 1);
        Object catalogItem = Iterables.get(orgCatalog, 2);
        if (org == null)
            org = defaultOrg;
        if (catalog == null)
            catalog = defaultCatalog;
        try {
            Map<String, ? extends org.jclouds.vcloud.domain.Catalog> catalogs = checkNotNull(
                    orgCatalogMap.get().get(org));
            return catalogs.get(catalog).get(catalogItem).getHref();
        } catch (NullPointerException e) {
            throw new NoSuchElementException(
                    org + "/" + catalog + "/" + catalogItem + " not found in " + orgCatalogMap.get());
        }
    }

}