Added "implements Serializable" some needed methods and default constructors for proper work of PdfDocument's deep copy.

DEVSIX-441

Author: IdamkinI

io/src/main/java/com/itextpdf/io/source/ArrayRandomAccessSource.java

@@ -1,9 +1,11 @@
 package com.itextpdf.io.source;
 
+import java.io.Serializable;
+
 /**
  * A RandomAccessSource that is based on an underlying byte array
  */
-class ArrayRandomAccessSource implements RandomAccessSource {
+class ArrayRandomAccessSource implements RandomAccessSource, Serializable {
     private byte[] array;
 
     public ArrayRandomAccessSource(byte[] array) {

io/src/main/java/com/itextpdf/io/source/ByteBuffer.java

@@ -1,6 +1,8 @@
 package com.itextpdf.io.source;
 
-public class ByteBuffer {
+import java.io.Serializable;
+
+public class ByteBuffer implements Serializable{
 
     private static final byte[] bytes = new byte[]{48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 97, 98, 99, 100, 101, 102};
 

io/src/main/java/com/itextpdf/io/source/PdfTokenizer.java

@@ -3,9 +3,10 @@
 import com.itextpdf.io.IOException;
 
 import java.io.Closeable;
+import java.io.Serializable;
 import java.util.Arrays;
 
-public class PdfTokenizer implements Closeable {
+public class PdfTokenizer implements Closeable, Serializable {
 
     public enum TokenType {
         Number,

io/src/main/java/com/itextpdf/io/source/RandomAccessFileOrArray.java

@@ -3,8 +3,9 @@
 import java.io.DataInput;
 import java.io.DataInputStream;
 import java.io.EOFException;
+import java.io.Serializable;
 
-public class RandomAccessFileOrArray implements DataInput {
+public class RandomAccessFileOrArray implements DataInput, Serializable {
 
     /**
      * When true the file access is not done through a memory mapped file. Use it if the file

kernel/src/main/java/com/itextpdf/kernel/events/EventDispatcher.java

@@ -1,5 +1,6 @@
 package com.itextpdf.kernel.events;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.HashMap;
@@ -9,7 +10,7 @@
  * IEventDispatcher implementation that forwards Events to registered {@link com.itextpdf.kernel.events.IEventHandler}
  * implementations.
  */
-public class EventDispatcher implements IEventDispatcher {
+public class EventDispatcher implements IEventDispatcher, Serializable {
 
     protected Map<String, List<IEventHandler>> eventHandlers = new HashMap<>();
 

kernel/src/main/java/com/itextpdf/kernel/geom/Rectangle.java

@@ -2,7 +2,9 @@
 
 import com.itextpdf.io.util.HashCode;
 
-public class Rectangle implements Cloneable {
+import java.io.Serializable;
+
+public class Rectangle implements Cloneable, Serializable {
 
     protected float x;
     protected float y;

kernel/src/main/java/com/itextpdf/kernel/pdf/PdfDocument.java

@@ -30,9 +30,7 @@
 import com.itextpdf.kernel.xmp.options.SerializeOptions;
 import com.itextpdf.kernel.numbering.RomanNumbering;
 
-import java.io.Closeable;
-import java.io.FileNotFoundException;
-import java.io.IOException;
+import java.io.*;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -42,7 +40,7 @@
 import java.util.Set;
 import java.util.TreeSet;
 
-public class PdfDocument implements IEventDispatcher, Closeable {
+public class PdfDocument implements IEventDispatcher, Closeable, Serializable {
 
     /**
      * Currently active page.
@@ -523,6 +521,22 @@ public PageSize getDefaultPageSize() {
         return defaultPageSize;
     }
 
+    public byte[] getSerializedBytes() {
+        try {
+            ByteArrayOutputStream bos = new ByteArrayOutputStream();
+            ObjectOutputStream oos = null;
+            oos = new ObjectOutputStream(bos);
+            oos.writeObject(this);
+            oos.flush();
+            oos.close();
+            bos.close();
+            return bos.toByteArray();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
     /**
      * Sets default page size.
      *

kernel/src/main/java/com/itextpdf/kernel/pdf/PdfNumTree.java

@@ -1,8 +1,9 @@
 package com.itextpdf.kernel.pdf;
 
+import java.io.Serializable;
 import java.util.*;
 
-public class PdfNumTree {
+public class PdfNumTree implements Serializable{
     private static final int NodeSize = 40;
 
     private PdfCatalog catalog;

kernel/src/main/java/com/itextpdf/kernel/pdf/PdfObject.java

@@ -5,11 +5,12 @@
 import com.itextpdf.kernel.crypto.BadPasswordException;
 
 import java.io.IOException;
+import java.io.Serializable;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-abstract public class PdfObject {
+abstract public class PdfObject implements Serializable{
 
     static public final byte Array = 1;
     static public final byte Boolean = 2;

kernel/src/main/java/com/itextpdf/kernel/pdf/PdfObjectWrapper.java

@@ -2,7 +2,9 @@
 
 import com.itextpdf.kernel.PdfException;
 
-public abstract class PdfObjectWrapper<T extends PdfObject> {
+import java.io.Serializable;
+
+public abstract class PdfObjectWrapper<T extends PdfObject> implements Serializable{
 
     private T pdfObject = null;