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added POJO generation
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‎.gitignore

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# Created by .ignore support plugin (hsz.mobi)
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.idea
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target
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output-schema.json
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output-schema.json

‎README.md

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[![codecov](https://codecov.io/gh/simplymequeeny/json-string-schema-generator/branch/master/graph/badge.svg)](https://codecov.io/gh/simplymequeeny/json-string-schema-generator)
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# json-string-schema-generator
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Generates JSON Schema based from JSON data using JAVA
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Generates JSON Schema or POJO based from JSON data using JAVA
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#### Motivation
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I have been googling a lot to find a library in JAVA that would generate me a JSON Schema based on the JSON data I have. But most of the libraries I found need to have a JAVA class in order to generate a JSON schema. So I made a simple JSON Schema Generator based on JSON data. If there is a library that already exists please let me know (via posting an Issue here) and I will be happy to use it in the current project I am working on. Thanks!
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}
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*/
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// To generate JSON schema into a file
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JsonSchemaGenerator.outputAsFile("Schedule", "this is a test", json, "output-schema.json");
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// the above statement will generate the file on the directory
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// where code was executed
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// To generate POJO(s)
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JsonSchemaGenerator.outputAsPOJO("Schedule", "this is a test", json, "com.example", "generated-sources");
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}
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}
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```
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1. [Java 8](https://www.oracle.com/java/index.html)
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1. [Jackson Databind](https://github.com/FasterXML/jackson-databind)
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1. [JSON Schema Validator](https://github.com/everit-org/json-schema)
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1. [jsonschema2pojo](http://www.jsonschema2pojo.org/)
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#### License
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This project is licensed under the MIT License - see the [LICENSE](/LICENSE) file for details

‎dependency-reduced-pom.xml

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<modelVersion>4.0.0</modelVersion>
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<groupId>org.simplymequeeny</groupId>
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<artifactId>json-string-schema-generator</artifactId>
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<version>1.0.2-SNAPSHOT</version>
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<version>1.0.2</version>
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<scm>
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<connection>scm:git:git://github.com/simplymequeeny/json-string-schema-generator.git</connection>
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<developerConnection>scm:git:[email protected]:simplymequeeny/json-string-schema-generator.git</developerConnection>
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<tag>json-string-schema-generator-1.0.2</tag>
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<url>https://github.com/simplymequeeny/json-string-schema-generator</url>
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</scm>
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<build>

‎json-string-schema-generator.iml

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<orderEntry type="library" name="Maven: commons-io:commons-io:2.5" level="project" />
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<orderEntry type="library" name="Maven: com.github.everit-org.json-schema:org.everit.json.schema:1.6.0" level="project" />
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<orderEntry type="library" name="Maven: com.google.guava:guava:22.0" level="project" />
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<orderEntry type="library" name="Maven: com.google.code.findbugs:jsr305:1.3.9" level="project" />
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<orderEntry type="library" name="Maven: com.google.errorprone:error_prone_annotations:2.0.18" level="project" />
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<orderEntry type="library" name="Maven: com.google.j2objc:j2objc-annotations:1.1" level="project" />
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<orderEntry type="library" name="Maven: org.codehaus.mojo:animal-sniffer-annotations:1.14" level="project" />
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<orderEntry type="library" name="Maven: commons-logging:commons-logging:1.2" level="project" />
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<orderEntry type="library" name="Maven: commons-collections:commons-collections:3.2.2" level="project" />
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<orderEntry type="library" name="Maven: com.damnhandy:handy-uri-templates:2.1.6" level="project" />
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<orderEntry type="library" name="Maven: joda-time:joda-time:2.9.4" level="project" />
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<orderEntry type="library" name="Maven: org.jsonschema2pojo:jsonschema2pojo-core:0.4.37" level="project" />
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<orderEntry type="library" name="Maven: com.google.code.javaparser:javaparser:1.0.11" level="project" />
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<orderEntry type="library" name="Maven: com.google.android:android:4.1.1.4" level="project" />
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<orderEntry type="library" name="Maven: org.apache.httpcomponents:httpclient:4.0.1" level="project" />
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<orderEntry type="library" name="Maven: org.apache.httpcomponents:httpcore:4.0.1" level="project" />
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<orderEntry type="library" name="Maven: commons-codec:commons-codec:1.3" level="project" />
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<orderEntry type="library" name="Maven: org.khronos:opengl-api:gl1.1-android-2.1_r1" level="project" />
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<orderEntry type="library" name="Maven: xerces:xmlParserAPIs:2.6.2" level="project" />
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<orderEntry type="library" name="Maven: xpp3:xpp3:1.1.4c" level="project" />
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<orderEntry type="library" name="Maven: com.sun.codemodel:codemodel:2.6" level="project" />
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<orderEntry type="library" name="Maven: com.google.code.gson:gson:2.5" level="project" />
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<orderEntry type="library" name="Maven: com.google.code.findbugs:jsr305:3.0.1" level="project" />
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<orderEntry type="library" name="Maven: com.squareup.moshi:moshi:1.1.0" level="project" />
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<orderEntry type="library" name="Maven: com.squareup.okio:okio:1.6.0" level="project" />
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<orderEntry type="library" name="Maven: commons-lang:commons-lang:2.6" level="project" />
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<orderEntry type="library" name="Maven: javax.validation:validation-api:1.0.0.GA" level="project" />
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<orderEntry type="library" name="Maven: joda-time:joda-time:2.2" level="project" />
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<orderEntry type="library" name="Maven: org.codehaus.jackson:jackson-mapper-asl:1.9.13" level="project" />
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<orderEntry type="library" name="Maven: org.codehaus.jackson:jackson-core-asl:1.9.13" level="project" />
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<orderEntry type="library" name="Maven: org.apache.commons:commons-lang3:3.2.1" level="project" />
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<orderEntry type="library" name="Maven: com.google.code.findbugs:annotations:1.3.9" level="project" />
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<orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
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<orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
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</component>

‎pom.xml

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<artifactId>org.everit.json.schema</artifactId>
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<version>1.6.0</version>
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</dependency>
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<dependency>
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<groupId>org.jsonschema2pojo</groupId>
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<artifactId>jsonschema2pojo-core</artifactId>
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<version>0.4.37</version>
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</dependency>
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<dependency>
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<groupId>junit</groupId>

‎src/main/java/org/simplymequeeny/JsonSchemaGenerator.java

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import com.fasterxml.jackson.databind.JsonNode;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.fasterxml.jackson.databind.node.JsonNodeType;
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import com.sun.codemodel.JCodeModel;
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import org.apache.commons.io.FileUtils;
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import org.everit.json.schema.Schema;
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import org.everit.json.schema.loader.SchemaLoader;
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import org.json.JSONObject;
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import org.json.JSONTokener;
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import org.jsonschema2pojo.SchemaMapper;
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import java.io.File;
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import java.io.IOException;
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"utf8");
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}
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public static void outputAsPOJO(String title, String description,
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String json, String packageName,
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String outputDirectory) throws IOException {
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String schema = JsonSchemaGenerator.outputAsString(title, title, json);
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LOGGER.info("Generating POJO(s) ...");
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File fDirectory = new File(outputDirectory);
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if (!fDirectory.exists()) FileUtils.forceMkdir(fDirectory);
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JCodeModel codeModel = new JCodeModel();
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SchemaMapper mapper = new SchemaMapper();
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mapper.generate(codeModel, title, packageName, schema);
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codeModel.build(fDirectory);
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LOGGER.info("DONE.");
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}
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private static String outputAsString(String title, String description,
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String json, JsonNodeType type) throws IOException {
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JsonNode jsonNode = objectMapper.readTree(json);

‎src/test/java/org/simplymequeeny/JsonSchemaGeneratorTest.java

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import org.junit.Assert;
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import org.junit.Test;
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import java.io.File;
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import java.io.IOException;
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public class JsonSchemaGeneratorTest {
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@Test
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Assert.assertTrue(FileUtils.getFile(filename).exists());
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}
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@Test
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public void shouldGeneratePOJOs() throws IOException {
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String json = "{\"createdAt\":\"2017-07-19T16:31:26.843Z\"," +
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"\"sectors\":[{\"times\":[{\"intensity\":30,\"start\":{\"hour\":8,\"minute\":30}," +
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"\"end\":{\"hour\":17,\"minute\":0}},{\"intensity\":10,\"start\":{\"hour\":17,\"minute\":5}," +
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"\"end\":{\"hour\":23,\"minute\":55}}],\"id\":\"dbea21eb-57b5-44c9-a953-f61816fd5876\"}]," +
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"\"dayOfWeek\":\"0,6\",\"createdBy\":\"Admin\",\"name\":\"test weekend preset\"," +
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"\"client\":\"TestClient\",\"id\":\"83d6640a-6d80-487c-b92c-e4239e1ec6d5\"," +
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"\"state\":true, \"dateToday\": \"null\"}";
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String directory = "generated-sources";
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JsonSchemaGenerator.outputAsPOJO("Schedule", "Test", json,
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"com.example", directory);
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Assert.assertTrue("POJO(s) not generated",
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FileUtils.getFile(directory).list().length > 0);
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FileUtils.forceDeleteOnExit(new File(directory));
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}
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@Test
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public void shouldGeneratePOJOsIntoExistingDirectory() throws IOException {
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String json = "{\"createdAt\":\"2017-07-19T16:31:26.843Z\"," +
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"\"sectors\":[{\"times\":[{\"intensity\":30,\"start\":{\"hour\":8,\"minute\":30}," +
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"\"end\":{\"hour\":17,\"minute\":0}},{\"intensity\":10,\"start\":{\"hour\":17,\"minute\":5}," +
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"\"end\":{\"hour\":23,\"minute\":55}}],\"id\":\"dbea21eb-57b5-44c9-a953-f61816fd5876\"}]," +
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"\"dayOfWeek\":\"0,6\",\"createdBy\":\"Admin\",\"name\":\"test weekend preset\"," +
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"\"client\":\"TestClient\",\"id\":\"83d6640a-6d80-487c-b92c-e4239e1ec6d5\"," +
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"\"state\":true, \"dateToday\": \"null\"}";
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String directory = "generated-src";
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File dir = new File(directory);
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FileUtils.forceMkdir(dir);
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JsonSchemaGenerator.outputAsPOJO("Schedule", "Test", json,
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"com.example", directory);
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Assert.assertTrue("POJO(s) not generated",
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FileUtils.getFile(directory).list().length > 0);
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FileUtils.forceDeleteOnExit(dir);
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}
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private boolean isValid(String json, String result) {
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boolean isValid = true;
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