2001

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Build # 2001

Build Type

push

travis-ci-com

Committed by

jaeopt

Commit Message

patches cherry-picked

Run Details

4889 of 5384 relevant lines covered (90.81%)

0.91 hits per line

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50.0

/core-api/src/main/java/com/optimizely/ab/event/internal/serializer/DefaultJsonSerializer.java

/**
 *
 *    Copyright 2016-2017, 2019, Optimizely and contributors
 *
 *    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.optimizely.ab.event.internal.serializer;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.optimizely.ab.config.parser.MissingJsonParserException;

import javax.annotation.Nonnull;

/**
 * Factory for generating {@link Serializer} instances, based on the json library available on the classpath.
 */
public final class DefaultJsonSerializer {

    private static final Logger logger = LoggerFactory.getLogger(DefaultJsonSerializer.class);

    private DefaultJsonSerializer() {
    }

    public static Serializer getInstance() {
        return LazyHolder.INSTANCE;
    }

    //======== Helper methods ========//

    /**
     * Creates and returns a {@link Serializer} using a json library available on the classpath.
     *
     * @return the created serializer
     * @throws MissingJsonParserException if there are no supported json libraries available on the classpath
     */
    private static @Nonnull
    Serializer create() {
        Serializer serializer;

        if (isPresent("com.fasterxml.jackson.databind.ObjectMapper")) {
            serializer = new JacksonSerializer();
        } else if (isPresent("com.google.gson.Gson")) {
            serializer = new GsonSerializer();
        } else if (isPresent("org.json.simple.JSONObject")) {
            serializer = new JsonSimpleSerializer();
        } else if (isPresent("org.json.JSONObject")) {
            serializer = new JsonSerializer();
        } else {
            throw new MissingJsonParserException("unable to locate a JSON parser. "
                + "Please see <link> for more information");
        }

        logger.debug("using json serializer: {}", serializer.getClass().getSimpleName());
        return serializer;
    }

    private static boolean isPresent(@Nonnull String className) {
        try {
            Class.forName(className);
            return true;
        } catch (ClassNotFoundException e) {
            return false;
        }
    }

    //======== Lazy-init Holder ========//

    private static class LazyHolder {
        private static final Serializer INSTANCE = create();
    }
}

1	/**
2	*
3	* Copyright 2016-2017, 2019, Optimizely and contributors
4	*
5	* Licensed under the Apache License, Version 2.0 (the "License");
6	* you may not use this file except in compliance with the License.
7	* You may obtain a copy of the License at
8	*
9	* http://www.apache.org/licenses/LICENSE-2.0
10	*
11	* Unless required by applicable law or agreed to in writing, software
12	* distributed under the License is distributed on an "AS IS" BASIS,
13	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14	* See the License for the specific language governing permissions and
15	* limitations under the License.
16	*/
17	package com.optimizely.ab.event.internal.serializer;
18
19	import org.slf4j.Logger;
20	import org.slf4j.LoggerFactory;
21
22	import com.optimizely.ab.config.parser.MissingJsonParserException;
23
24	import javax.annotation.Nonnull;
25
26	/**
27	* Factory for generating {@link Serializer} instances, based on the json library available on the classpath.
28	*/
29	public final class DefaultJsonSerializer {
30
31	private static final Logger logger = LoggerFactory.getLogger(DefaultJsonSerializer.class);	1✔
32
33	private DefaultJsonSerializer() {
34	}
35
36	public static Serializer getInstance() {
37	return LazyHolder.INSTANCE;	1✔
38	}
39
40	//======== Helper methods ========//
41
42	/**
43	* Creates and returns a {@link Serializer} using a json library available on the classpath.
44	*
45	* @return the created serializer
46	* @throws MissingJsonParserException if there are no supported json libraries available on the classpath
47	*/
48	private static @Nonnull
49	Serializer create() {
50	Serializer serializer;
51
52	if (isPresent("com.fasterxml.jackson.databind.ObjectMapper")) {	1✔
53	serializer = new JacksonSerializer();	1✔
54	} else if (isPresent("com.google.gson.Gson")) {	×
55	serializer = new GsonSerializer();	×
56	} else if (isPresent("org.json.simple.JSONObject")) {	×
57	serializer = new JsonSimpleSerializer();	×
58	} else if (isPresent("org.json.JSONObject")) {	×
59	serializer = new JsonSerializer();	×
60	} else {
61	throw new MissingJsonParserException("unable to locate a JSON parser. "	×
62	+ "Please see <link> for more information");
63	}
64
65	logger.debug("using json serializer: {}", serializer.getClass().getSimpleName());	1✔
66	return serializer;	1✔
67	}
68
69	private static boolean isPresent(@Nonnull String className) {
70	try {
71	Class.forName(className);	1✔
72	return true;	1✔
73	} catch (ClassNotFoundException e) {	×
74	return false;	×
75	}
76	}
77
78	//======== Lazy-init Holder ========//
79
80	private static class LazyHolder {
81	private static final Serializer INSTANCE = create();	1✔
82	}
83	}

optimizely / java-sdk / 2001

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