Added freemarker template

pom.xml

@@ -82,6 +82,12 @@
 			<artifactId>javax.ws.rs-api</artifactId>
 		</dependency>
 
+		<dependency>
+			<groupId>org.freemarker</groupId>
+			<artifactId>freemarker</artifactId>
+			<version>2.3.32</version>
+		</dependency>
+
 		<!-- Added to support Java 11 JDK -->
 		<dependency>
 			<groupId>javax.xml.ws</groupId>

src/test/java/org/gcube/grsf/freemarker/FreeMarkerTest.java

@@ -0,0 +1,62 @@
+package org.gcube.grsf.freemarker;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.io.Writer;
+import java.net.URL;
+import java.util.Map;
+
+import org.gcube.com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.Test;
+
+import freemarker.template.Configuration;
+import freemarker.template.Template;
+import freemarker.template.TemplateExceptionHandler;
+
+public class FreeMarkerTest {
+
+	public File getResourcesDirectory() throws Exception {
+		URL logbackFileURL = this.getClass().getClassLoader().getResource("logback-test.xml");
+		File logbackFile = new File(logbackFileURL.toURI());
+		File resourcesDirectory = logbackFile.getParentFile();
+		return resourcesDirectory;
+	}
+	
+	public File getTraceabilityUnitExampleDirectory() throws Exception {
+		File resourcesDirectory = getResourcesDirectory();
+		return new File(resourcesDirectory, "examples/AssessmentUnit");
+	}
+	
+	public File getFreemarkerDirectory() throws Exception {
+		File resourcesDirectory = getResourcesDirectory();
+		return new File(resourcesDirectory, "freemarker");
+	}
+	
+	public Configuration getConfiguration() throws Exception {
+		Configuration cfg = new Configuration(Configuration.VERSION_2_3_23);
+		cfg.setDirectoryForTemplateLoading(getFreemarkerDirectory());
+		cfg.setDefaultEncoding("UTF-8");
+		cfg.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
+		return cfg;
+	}
+	
+	@Test
+	public void testIt() throws Exception {
+		Configuration cfg = getConfiguration();
+		Template template = cfg.getTemplate("example.ftl");
+		
+		File json = new File(getTraceabilityUnitExampleDirectory(), "00a1f849-1b43-3fd1-9255-1d1134c969bb.json");
+	    ObjectMapper mapper = new ObjectMapper();
+	    Map map = mapper.readValue(json, Map.class);
+	    
+	    File out = new File(getFreemarkerDirectory(), "output.json");
+	    out.delete();
+	    
+	    Writer writer = new FileWriter(out);
+        template.process(map, writer);
+        writer.flush();
+        writer.close();
+	    
+	}
+	
+}

src/test/resources/freemarker/example.ftl

@@ -0,0 +1,17 @@
+{
+	"title" : "${stock_name}",
+	"license_id": "${license_id}",
+	"description": 
+		"Short Name: ${short_name}\nGRSF Semantic Identifier: ${grsf_semantic_identifier}\nRecord URL: https://data.d4science.org/ctlg/GRSF_Admin/${grsf_uuid}",
+	"tags" : [
+		{
+			"name": "${similarities_indicator}"
+		}
+	],
+	"extras": [
+		{
+			"key": "Record URL",
+			"value": "https://data.d4science.org/ctlg/GRSF_Admin/${grsf_uuid}"
+		}
+	]
+}