com.google.api.client.googleapis.util.Utils.java Source code

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Here is the source code for com.google.api.client.googleapis.util.Utils.java

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/*
 * Copyright 2013 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.google.api.client.googleapis.util;

import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.util.Beta;

/**
 * {@link Beta} <br/>
 * Utility class for the Google API Client Library.
 *
 * @since 1.19
 */
@Beta
public final class Utils {

    /**
     * Returns a cached default implementation of the JsonFactory interface.
     */
    public static JsonFactory getDefaultJsonFactory() {
        return JsonFactoryInstanceHolder.INSTANCE;
    }

    private static class JsonFactoryInstanceHolder {
        // The jackson2.JacksonFactory was introduced as a product dependency in 1.19 to enable
        // other APIs to not require one of these for input. This was the most commonly used
        // implementation in public samples. This is a compile-time dependency to help detect the
        // dependency as early as possible.
        static final JsonFactory INSTANCE = new JacksonFactory();
    }

    /**
     * Returns a cached default implementation of the HttpTransport interface.
     */
    public static HttpTransport getDefaultTransport() {
        return TransportInstanceHolder.INSTANCE;
    }

    private static class TransportInstanceHolder {
        static final HttpTransport INSTANCE = new NetHttpTransport();
    }

    private Utils() {
    }
}