Test Cases - XStream Object to-from json

Test Cases - XStream Object to-from json

xstream/pom.xml

@@ -14,6 +14,12 @@
 			<version>1.4.5</version>
 		</dependency>
 
+		<dependency>
+			<groupId>org.codehaus.jettison</groupId>
+			<artifactId>jettison</artifactId>
+			<version>1.3.7</version>
+		</dependency>
+		
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>

xstream/src/main/java/com/baeldung/initializer/SimpleXstreamInitializer.java

@@ -1,19 +1,23 @@
 package com.baeldung.initializer;
 
 import com.thoughtworks.xstream.XStream;
+import com.thoughtworks.xstream.io.json.JettisonMappedXmlDriver;
+import com.thoughtworks.xstream.io.json.JsonHierarchicalStreamDriver;
 
 public class SimpleXstreamInitializer {
 
-    private XStream xtreamInstance;
-
 	public XStream getXstreamInstance() {
-        if (xtreamInstance == null) {
-            synchronized (SimpleXstreamInitializer.class) {
-                if (xtreamInstance == null) {
-                    xtreamInstance = new XStream();
-                }
-            }
-        }
+		XStream xtreamInstance = new XStream();
 		return xtreamInstance;
 	}
+
+	public XStream getXstreamJettisonMappedInstance() {
+		XStream xstreamInstance = new XStream(new JettisonMappedXmlDriver());
+		return xstreamInstance;
+	}
+
+	public XStream getXstreamJsonHierarchicalInstance() {
+		XStream xstreamInstance = new XStream(new JsonHierarchicalStreamDriver());
+		return xstreamInstance;
+	}
 }

xstream/src/test/java/com/baeldung/test/XStreamJettisonTest.java

@@ -0,0 +1,48 @@
+package com.baeldung.test;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.baeldung.initializer.SimpleXstreamInitializer;
+import com.baeldung.pojo.ContactDetails;
+import com.baeldung.pojo.Customer;
+import com.baeldung.utility.SimpleDataGeneration;
+import com.thoughtworks.xstream.XStream;
+
+public class XStreamJettisonTest {
+
+	private Customer customer = null;
+
+	private String dataJson = null;
+
+	private XStream xstream = null;
+
+	@Before
+	public void dataSetup() {
+		SimpleXstreamInitializer simpleXstreamInitializer = new SimpleXstreamInitializer();
+		xstream = simpleXstreamInitializer.getXstreamJettisonMappedInstance();
+		xstream.processAnnotations(Customer.class);
+	}
+
+	@Test
+	public void convertObjectToJson() {
+		customer = SimpleDataGeneration.generateData();
+		xstream.alias("customer" , Customer.class);
+		xstream.alias("contactDetails" , ContactDetails.class);
+		xstream.aliasField("fn" , Customer.class , "firstName");
+		dataJson = xstream.toXML(customer);
+		System.out.println(dataJson);
+		Assert.assertNotNull(dataJson);
+	}
+
+	@Test
+	public void convertJsonToObject() {
+		customer = SimpleDataGeneration.generateData();
+		dataJson = xstream.toXML(customer);
+		customer = (Customer) xstream.fromXML(dataJson);
+		System.out.println(customer);
+		Assert.assertNotNull(customer);
+	}
+
+}

xstream/src/test/java/com/baeldung/test/XStreamJsonHierarchicalTest.java

@@ -0,0 +1,45 @@
+package com.baeldung.test;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.baeldung.initializer.SimpleXstreamInitializer;
+import com.baeldung.pojo.ContactDetails;
+import com.baeldung.pojo.Customer;
+import com.baeldung.utility.SimpleDataGeneration;
+import com.thoughtworks.xstream.XStream;
+
+public class XStreamJsonHierarchicalTest {
+
+	private Customer customer = null;
+	private String dataJson = null;
+	private XStream xstream = null;
+
+	@Before
+	public void dataSetup() {
+		SimpleXstreamInitializer simpleXstreamInitializer = new SimpleXstreamInitializer();
+		xstream = simpleXstreamInitializer.getXstreamJsonHierarchicalInstance();
+		xstream.processAnnotations(Customer.class);
+	}
+
+	@Test
+	public void convertObjectToJson() {
+		customer = SimpleDataGeneration.generateData();
+		xstream.alias("customer", Customer.class);
+		xstream.alias("contactDetails", ContactDetails.class);
+		xstream.aliasField("fn", Customer.class, "firstName");
+		dataJson = xstream.toXML(customer);
+		System.out.println(dataJson);
+		Assert.assertNotNull(dataJson);
+	}
+
+	@Test
+	public void convertJsonToObject() {
+		customer = SimpleDataGeneration.generateData();
+		dataJson = xstream.toXML(customer);
+		// customer = (Customer) xstream.fromXML(dataJson);
+		// Assert.assertNotNull(customer);
+	}
+
+}