com.cloudera.director.google.util.Urls.java Source code

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Here is the source code for com.cloudera.director.google.util.Urls.java

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/*
 * Copyright (c) 2015 Google, Inc.
 *
 * 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 com.cloudera.director.google.util;

import com.google.api.client.http.GenericUrl;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;

import java.util.List;

public final class Urls {

    @VisibleForTesting
    static final String MALFORMED_RESOURCE_URL_MSG = "Malformed resource url '%s'.";

    private Urls() {
    }

    public static String getLocalName(String fullResourceUrl) {
        if (fullResourceUrl == null || fullResourceUrl.isEmpty()) {
            return null;
        }

        GenericUrl url = new GenericUrl(fullResourceUrl);
        return Iterables.getLast(url.getPathParts());
    }

    public static String getProject(String fullResourceUrl) {
        if (fullResourceUrl == null || fullResourceUrl.isEmpty()) {
            return null;
        }

        List<String> pathParts = new GenericUrl(fullResourceUrl).getPathParts();

        if (pathParts == null) {
            throw new IllegalArgumentException(String.format(MALFORMED_RESOURCE_URL_MSG, fullResourceUrl));
        }

        String[] urlParts = Iterables.toArray(pathParts, String.class);

        // Resource urls look like so: https://www.googleapis.com/compute/v1/projects/rhel-cloud/global/images/rhel-6-v20150526
        // The path parts begin after the host and include a leading "" path part to force the leading slash.
        if (urlParts.length < 8) {
            throw new IllegalArgumentException(String.format(MALFORMED_RESOURCE_URL_MSG, fullResourceUrl));
        } else {
            return urlParts[urlParts.length - 4];
        }
    }

    public static String buildGenericApisUrl(String domainName, String version, String projectId,
            String... resourcePathParts) {
        GenericUrl genericUrl = new GenericUrl();
        genericUrl.setScheme("https");
        genericUrl.setHost("www.googleapis.com");

        List<String> pathParts = Lists.newArrayList("", domainName, version);
        pathParts.add("projects");
        pathParts.add(projectId);

        if (resourcePathParts != null) {
            pathParts.addAll(Lists.newArrayList(resourcePathParts));
        }

        genericUrl.setPathParts(pathParts);

        return genericUrl.build();
    }
}