Update to pickup change in zjsonpatch 0.4.2

Closes #2

Author: dandoug

README.md

@@ -20,15 +20,15 @@ The code here was ported (copied, renamed, repackaged, modified) from the [zjson
 
 ### How to use:
 
-### Current Version : 0.4.1
+### Current Version : 0.4.2
 
 Add following to `<dependencies/>` section of your pom.xml -
 
 ```xml
 <dependency>
   <groupId>com.ebay.bsonpatch</groupId>
   <artifactId>bsonpatch</artifactId>
-  <version>0.4.1</version>
+  <version>0.4.2</version>
 </dependency>
 ```
 

pom.xml

@@ -6,7 +6,7 @@
 
 	<groupId>com.ebay.bsonpatch</groupId>
 	<artifactId>bsonpatch</artifactId>
-	<version>0.4.1-SNAPSHOT</version>
+	<version>0.4.2</version>
 	<packaging>jar</packaging>
 
 	<name>${project.groupId}:${project.artifactId}</name>

src/main/java/com/ebay/bsonpatch/InPlaceApplyProcessor.java

@@ -23,7 +23,9 @@
 import java.util.List;
 
 import org.bson.BsonArray;
+import org.bson.BsonBinary;
 import org.bson.BsonDocument;
+import org.bson.BsonJavaScriptWithScope;
 import org.bson.BsonValue;
 
 class InPlaceApplyProcessor implements BsonPatchProcessor {
@@ -58,7 +60,8 @@ public void copy(List<String> fromPath, List<String> toPath) {
         BsonValue parentNode = getParentNode(fromPath, Operation.COPY);
         String field = fromPath.get(fromPath.size() - 1).replaceAll("\"", "");
         BsonValue valueNode = parentNode.isArray() ? parentNode.asArray().get(Integer.parseInt(field)) : parentNode.asDocument().get(field);
-        add(toPath, valueNode);
+        BsonValue valueToCopy = valueNode != null ? cloneBsonValue(valueNode) : null;
+        add(toPath, valueToCopy);
     }
 
     @Override
@@ -238,4 +241,26 @@ private int arrayIndex(String s, int max, boolean allowNoneExisting) {
     private boolean isNullOrEmpty(String string) {
         return string == null || string.length() == 0;
     }
+    
+    private static BsonValue cloneBsonValue(BsonValue from) {
+        BsonValue to;
+        switch (from.getBsonType()) {
+            case DOCUMENT:
+                to = from.asDocument().clone();
+                break;
+            case ARRAY:
+                to = from.asArray().clone();
+                break;
+            case BINARY:
+            	to = new BsonBinary(from.asBinary().getType(), from.asBinary().getData().clone());
+                break;
+            case JAVASCRIPT_WITH_SCOPE:
+            	to = new BsonJavaScriptWithScope(from.asJavaScriptWithScope().getCode(), from.asJavaScriptWithScope().getScope().clone());
+                break;
+            default:
+                to = from; // assume that from is immutable
+        }
+        return to;
+    }
+    
 }

src/test/java/com/ebay/bsonpatch/JsonDiffTest.java

@@ -140,4 +140,15 @@ public void testRenderedOperationsExceptMoveAndCopy() throws Exception {
 
     }
 
+    @Test
+    public void testPath() throws Exception {
+        BsonValue source = BsonDocument.parse("{\"profiles\":{\"abc\":[],\"def\":[{\"hello\":\"world\"}]}}");
+        BsonArray patch = BsonArray.parse("[{\"op\":\"copy\",\"from\":\"/profiles/def/0\", \"path\":\"/profiles/def/0\"},{\"op\":\"replace\",\"path\":\"/profiles/def/0/hello\",\"value\":\"world2\"}]");
+
+        BsonValue target = BsonPatch.apply(patch, source);
+        //System.out.println(target);
+        BsonValue expected = BsonDocument.parse("{\"profiles\":{\"abc\":[],\"def\":[{\"hello\":\"world2\"},{\"hello\":\"world\"}]}}");
+        Assert.assertTrue(target.equals(expected));
+    }    
+    
 }