Update libraries, Added test case.

.classpath

@@ -14,5 +14,6 @@
 	</classpathentry>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11/"/>
 	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
+	<classpathentry combineaccessrules="false" kind="src" path="/reflection"/>
 	<classpathentry kind="output" path="bin/default"/>
 </classpath>

bin/.gitignore

@@ -1,2 +1,3 @@
 /main/
 /test/
+/default/

build.gradle

@@ -8,7 +8,7 @@ repositories {
 }
 
 dependencies {
-	compile 'com.github.realtimetech-solution:reflection:0.1.1'
+	compile 'com.github.realtimetech-solution:reflection:0.1.2'
 }
 
 jar {

src/main/java/com/realtimetech/kson/KsonContext.java

@@ -38,6 +38,7 @@ private enum ValueMode {
 	// for object
 	private FastStack<Object> objectStack;
 	private FastStack<KsonValue> ksonStack;
+	private boolean working;
 
 	private HashMap<Class<?>, Transformer<?>> registeredTransformers;
 
@@ -54,6 +55,7 @@ public KsonContext() {
 	}
 
 	public KsonContext(int stackSize, int stringBufferSize) {
+		this.working = false;
 		this.valueStack = new FastStack<Object>(stackSize);
 		this.modeStack = new FastStack<ValueMode>(stackSize);
 		this.stringMaker = new StringMaker(stringBufferSize);
@@ -279,11 +281,10 @@ public Object addToObjectStack(Object object) throws DeserializeException {
 	}
 
 	public Object addToObjectStack(Class<?> clazz, Object object) throws DeserializeException {
-		boolean needLoop = this.objectStack.isEmpty();
-
 		Object result = this.createAtToObject(true, clazz, object);
 
-		if (needLoop) {
+		if (!this.working) {
+			this.working = true;
 			while (!this.objectStack.isEmpty()) {
 				Object targetObject = this.objectStack.pop();
 				KsonValue targetKson = this.ksonStack.pop();
@@ -316,7 +317,7 @@ public Object addToObjectStack(Class<?> clazz, Object object) throws Deserialize
 					}
 				}
 			}
-
+			this.working = false;
 			this.objectStack.reset();
 			this.ksonStack.reset();
 		}
@@ -405,7 +406,7 @@ private Object createAtToObject(boolean first, Class<?> type, Object originalVal
 				}
 			}
 
-			if (useStack) {
+			if (useStack && convertedValue != null) {
 				this.ksonStack.push((KsonValue) originalValue);
 				this.objectStack.push(convertedValue);
 			}
@@ -415,19 +416,18 @@ private Object createAtToObject(boolean first, Class<?> type, Object originalVal
 	}
 
 	public KsonValue fromObject(Object object) throws SerializeException {
-		if (this.objectStack.isEmpty()) {
+		if (!this.working) {
 			return (KsonValue) addFromObjectStack(object);
 		} else {
 			throw new SerializeException("This context already running serialize!");
 		}
 	}
 
 	public Object addFromObjectStack(Object object) throws SerializeException {
-		boolean needLoop = this.objectStack.isEmpty();
-
 		Object result = null;
 
-		if (needLoop) {
+		if (!this.working) {
+			this.working = true;
 			result = this.createAtFromObject(true, object.getClass(), object);
 
 			while (!this.objectStack.isEmpty()) {
@@ -461,6 +461,7 @@ public Object addFromObjectStack(Object object) throws SerializeException {
 
 			this.objectStack.reset();
 			this.ksonStack.reset();
+			this.working = false;
 		} else {
 			result = this.createAtFromObject(false, Object.class, object);
 		}

src/main/java/com/realtimetech/kson/test/TestObject.java

@@ -53,6 +53,8 @@ public class TestObject {
 	private LinkedList<Double> doubleLinkedList;
 	private List<Double> doubleList;
 
+	private LinkedList<TestSingle> testSingleList;
+
 	private HashMap<String, String> stringMap;
 	private HashMap<String, Date> dateMap;
 	private HashMap<HashMap<String, String>, HashMap<String, String>> mapMap;
@@ -257,6 +259,13 @@ public TestObject(Test test) {
 			this.doubleList.add(2d);
 		}
 
+		this.testSingleList = new LinkedList<TestSingle>();
+		{
+			this.testSingleList.add(new TestSingle());
+			this.testSingleList.add(new TestSingle());
+			this.testSingleList.add(new TestSingle());
+		}
+
 		this.mapMap = new HashMap<HashMap<String, String>, HashMap<String, String>>();
 		{
 			{

src/main/java/com/realtimetech/kson/test/TestSingle.java

@@ -0,0 +1,16 @@
+package com.realtimetech.kson.test;
+
+import java.util.LinkedList;
+
+public class TestSingle {
+	private LinkedList<TestSmall> testSmallList;
+
+	public TestSingle() {
+		this.testSmallList = new LinkedList<TestSmall>();
+		{
+			this.testSmallList.add(new TestSmall());
+			this.testSmallList.add(new TestSmall());
+			this.testSmallList.add(new TestSmall());
+		}
+	}
+}

src/main/java/com/realtimetech/kson/test/TestSmall.java

@@ -0,0 +1,9 @@
+package com.realtimetech.kson.test;
+
+public class TestSmall {
+	private String string = "ABC";
+
+	public String getString() {
+		return string;
+	}
+}