No class found Exception while validating Json with JsonSchema

Question

I am new to Java.

I am trying to validate a Json with JsonSchema. I have referred Java/Android - Validate String JSON against String schema.. I have tried with #Tihamer code and I am getting a JsonParserException which I have not used it.

Below is my code

import java.util.Iterator;
import com.fasterxml.jackson.databind.JsonNode;
import com.github.fge.jackson.JsonLoader;
import com.github.fge.jsonschema.core.report.ProcessingMessage;
import com.github.fge.jsonschema.core.report.ProcessingReport;
import com.github.fge.jsonschema.main.JsonSchema;
import com.github.fge.jsonschema.main.JsonSchemaFactory;

public class JsonValidation {
    public static void main(String[] args)
    {
        JsonValidation jv = new JsonValidation();
        String jsonData = "{\"dispatcherMode\":\"standard\",\"noOfdispatcher\":\"3\",\"dispatcherInfo\":[{\"dispatcher\":\"Dispatcher 0 = 156.95.53.243:6108<--current\"},{\"dispatcher\":\"Dispatcher 1 = 156.95.53.220:6108\"},{\"dispatcher\":\"Dispatcher 2 = 172.26.41.113:6108\"}],\"noOfAuthServer\":\"3\",\"connected\":\"3\",\"authorizationInfo\":[{\"authServer\":\"authserver 0 = 172.26.41.114:6115(connected)<--current\",\"requests\":\"1503\",\"failures\":\"1\",\"queued\":\"0\",\"delay\":\"10225\"},{\"authServer\":\"authserver 1 = 156.95.53.220:6115(connected)\",\"requests\":\"10745\",\"failures\":\"0\",\"queued\":\"0\",\"delay\":\"5762\"},{\"authServer\":\"authserver 2 = 172.26.41.113:6115(connected)\",\"requests\":\"12545\",\"failures\":\"1\",\"queued\":\"0\",\"delay\":\"9756\"}],\"noOfCache\":\"2\",\"cacheInfo\":[{\"cacheNumber\":\"cache 0\",\"request\":\"0\",\"hits\":\"0\",\"entries\":\"0\",\"size\":\"10000\",\"ttl\":\"600sec\"},{\"cacheNumber\":\"cache 1\",\"request\":\"1\",\"hits\":\"1\",\"entries\":\"1\",\"size\":\"12000\",\"ttl\":\"300sec\"}]}";
        String jsonSchema = "{\"type\": \"object\",\"properties\": {\"dispatcherMode\": {\"type\": \"string\"},\"noOfdispatcher\": {\"type\": \"string\"},\"dispatcherInfo\": {\"type\": \"array\",\"items\": [{\"type\": \"object\",\"properties\": {\"dispatcher\": {\"type\": \"string\"}}},{\"type\": \"object\",\"properties\": {\"dispatcher\": {\"type\": \"string\"}}},{\"type\": \"object\",\"properties\": {\"dispatcher\": {\"type\": \"string\"}}}]},\"noOfAuthServer\": {\"type\": \"string\"},\"connected\": {\"type\": \"string\"},\"authorizationInfo\": {\"type\": \"array\",\"items\": [{\"type\": \"object\",\"properties\": {\"authServer\": {\"type\": \"string\"},\"requests\": {\"type\": \"string\"},\"failures\": {\"type\": \"string\"},\"queued\": {\"type\": \"string\"},\"delay\": {\"type\": \"string\"}}},{\"type\": \"object\",\"properties\": {\"authServer\": {\"type\": \"string\"},\"requests\": {\"type\": \"string\"},\"failures\": {\"type\": \"string\"},\"queued\": {\"type\": \"string\"},\"delay\": {\"type\": \"string\"}}},{\"type\": \"object\",\"properties\": {\"authServer\": {\"type\": \"string\"},\"requests\": {\"type\": \"string\"},\"failures\": {\"type\": \"string\"},\"queued\": {\"type\": \"string\"},\"delay\": {\"type\": \"string\"}}}]},\"noOfCache\": {\"type\": \"string\"},\"cacheInfo\": {\"type\": \"array\",\"items\": [{\"type\": \"object\",\"properties\": {\"cacheNumber\": {\"type\": \"string\"},\"request\": {\"type\": \"string\"},\"hits\": {\"type\": \"string\"},\"entries\": {\"type\": \"string\"},\"size\": {\"type\": \"string\"},\"ttl\": {\"type\": \"string\"}}},{\"type\": \"object\",\"properties\": {\"cacheNumber\": {\"type\": \"string\"},\"request\": {\"type\": \"string\"},\"hits\": {\"type\": \"string\"},\"entries\": {\"type\": \"string\"},\"size\": {\"type\": \"string\"},\"ttl\": {\"type\": \"string\"}}}]}},\"required\": [\"dispatcherMode\",\"noOfdispatcher\",\"dispatcherInfo\",\"noOfAuthServer\",\"connected\",\"authorizationInfo\",\"noOfCache\",\"cacheInfo\"]}";
        jv.validation(jsonData, jsonSchema);
    }


    public boolean validation(String  jsonData, String jsonSchema)
    {
        ProcessingReport report = null;
        boolean result = false;
        try{
            JsonNode schemaNode = JsonLoader.fromString(jsonSchema);
            JsonNode dataNode = JsonLoader.fromString(jsonData);
            JsonSchemaFactory factory = JsonSchemaFactory.byDefault();
            JsonSchema schema = factory.getJsonSchema(schemaNode);
            report = schema.validate(dataNode);
        }
        catch(Exception ex){
            ex.printStackTrace();
        }


        if (report != null) {
            Iterator<ProcessingMessage> iter = report.iterator();
            while (iter.hasNext()) {
                ProcessingMessage pm = iter.next();
                System.out.println("Processing Message: "+pm.getMessage());
            }
            result = report.isSuccess();
        }
        System.out.println(" Result=" +result);
        return result;
    }

}

and below is the error

Exception in thread "main" java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/JsonParseException
    at com.github.fge.jackson.JsonLoader.<clinit>(JsonLoader.java:50)
    at JsonValidation.validation(JsonValidation.java:25)
    at JsonValidation.main(JsonValidation.java:16)
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.core.JsonParseException
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 3 more

I solved the previous error but now I am getting error like

Exception in thread "main" java.lang.NoSuchMethodError: com.fasterxml.jackson.core.JsonFactory.requiresPropertyOrdering()Z
    at com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:537)
    at com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:448)
    at com.github.fge.jackson.JacksonUtils.newMapper(JacksonUtils.java:155)
    at com.github.fge.jackson.JacksonUtils.<clinit>(JacksonUtils.java:55)
    at com.github.fge.jackson.JsonNodeReader.<init>(JsonNodeReader.java:82)
    at com.github.fge.jackson.JsonLoader.<clinit>(JsonLoader.java:50)
    at com.github.fge.jsonschema.examples.Utils.loadResource(Utils.java:53)
    at JsonValidateTest.main(JsonValidateTest.java:19)

I have not used the objectMapper class but I am getting exception.

@VedantKekan mine is not the maven project.. so wer can i add the dependency?? — Pratik, Oct 15 '15 at 08:29
@VedantKekan Thank you.. it got resolved, only thing missing was jar i added all the jars and go the result. — Pratik, Oct 19 '15 at 08:59

score 1 · Accepted Answer · answered Oct 15 '15 at 05:46

1

See the following part in your stack trace:

Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.core.JsonParseException
    at java.net.URLClassLoader$1.run(Unknown Source)
    ...

It clearly suggests that the error is caused by a class JsonParseException of the package com.fasterxml.jackson.core which the JVM tried to load but could not find it as it is not in your classpath.

Just add the com.fasterxml.jackson.core jar file in your classpath.

answered Oct 15 '15 at 05:46

thegauravmahawar

2,802
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Thank you @thegauravmahawar.. your answer helped me to solve that error. – Pratik Oct 15 '15 at 06:32
can you help me with the other error which i mentioned in the same question?? – Pratik Oct 15 '15 at 07:17

VedantK · Answer 2 · 2015-10-15T08:53:51.190

Add jackson-annotations.jar Download it from here

If maven project, add this dependancy.

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.6.3</version>
</dependency>

PS: Whenever you get classnotfound, consider you need to make that class available

JUST FYI:public class ClassNotFoundException extends ReflectiveOperationException

Thrown when an application tries to load in a class through its string name using:

The forName method in class Class.
The findSystemClass method in class ClassLoader .
The loadClass method in class ClassLoader. but no definition for the class with the specified name could be found.

From docs

For second error: Add This (Replace version) Download jar here and add

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>${jackson.version}</version>
</dependency>

thank you... i downloaded the jar file and got rid of this error.. Thank you for your help — Pratik, Oct 15 '15 at 06:39

No class found Exception while validating Json with JsonSchema

2 Answers2