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From mdue...@apache.org
Subject svn commit: r1298888 - in /jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit: ./ state/
Date Fri, 09 Mar 2012 15:49:56 GMT
Author: mduerig
Date: Fri Mar  9 15:49:56 2012
New Revision: 1298888

URL: http://svn.apache.org/viewvc?rev=1298888&view=rev
Log:
Microkernel based prototype of JCR implementation (WIP)
- rename NodeState to TransientNodeState to avoid naming conflict with NodeState interface
in Microkernel

Added:
    jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/TransientNodeState.java
      - copied, changed from r1298846, jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeState.java
Removed:
    jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeState.java
Modified:
    jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/NodeImpl.java
    jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/PropertyImpl.java
    jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/SessionImpl.java
    jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeStateCache.java
    jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeStateCacheImpl.java

Modified: jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/NodeImpl.java
URL: http://svn.apache.org/viewvc/jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/NodeImpl.java?rev=1298888&r1=1298887&r2=1298888&view=diff
==============================================================================
--- jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/NodeImpl.java
(original)
+++ jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/NodeImpl.java
Fri Mar  9 15:49:56 2012
@@ -25,7 +25,7 @@ import org.apache.jackrabbit.json.JsonVa
 import org.apache.jackrabbit.spi.commons.iterator.Iterators;
 import org.apache.jackrabbit.spi.commons.iterator.Predicate;
 import org.apache.jackrabbit.spi.commons.iterator.Transformer;
-import org.apache.jackrabbit.state.NodeState;
+import org.apache.jackrabbit.state.TransientNodeState;
 import org.apache.jackrabbit.utils.ItemNameMatcher;
 import org.apache.jackrabbit.utils.NodeIteratorAdapter;
 import org.apache.jackrabbit.utils.PropertyIteratorAdapter;
@@ -57,24 +57,24 @@ import java.util.Iterator;
 import java.util.Map.Entry;
 
 public class NodeImpl extends ItemImpl implements Node {
-    private final NodeState nodeState;
+    private final TransientNodeState state;
 
     static boolean exist(Context sessionContext, Path path) {
-        return NodeState.hasNodeState(sessionContext, path);
+        return TransientNodeState.hasNodeState(sessionContext, path);
     }
 
     static Node create(Context sessionContext, Path path) throws PathNotFoundException {
-        NodeState nodeState = getNodeState(sessionContext, path);
-        return new NodeImpl(sessionContext, nodeState);
+        TransientNodeState state = getNodeState(sessionContext, path);
+        return new NodeImpl(sessionContext, state);
     }
 
-    static Node create(Context sessionContext, NodeState nodeState) {
-        return new NodeImpl(sessionContext, nodeState);
+    static Node create(Context sessionContext, TransientNodeState state) {
+        return new NodeImpl(sessionContext, state);
     }
 
-    private NodeImpl(Context sessionContext, NodeState nodeState) {
+    private NodeImpl(Context sessionContext, TransientNodeState state) {
         super(sessionContext);
-        this.nodeState = nodeState;
+        this.state = state;
     }
 
     //------------------------------------------< Item/Node >---
@@ -86,7 +86,7 @@ public class NodeImpl extends ItemImpl i
 
     @Override
     public String getName() throws RepositoryException {
-        return nodeState.getName();
+        return state.getName();
     }
 
     @Override
@@ -101,7 +101,7 @@ public class NodeImpl extends ItemImpl i
 
     @Override
     public Node getParent() throws RepositoryException {
-        if (nodeState.isRoot()) {
+        if (state.isRoot()) {
             throw new ItemNotFoundException("Root has no parent");
         }
 
@@ -120,19 +120,19 @@ public class NodeImpl extends ItemImpl i
 
     @Override
     public boolean isNew() {
-        return nodeState.isNew();
+        return state.isNew();
     }
 
     @Override
     public boolean isModified() {
-        return nodeState.isModified();
+        return state.isModified();
     }
 
     @Override
     public Node addNode(String relPath) throws RepositoryException {
         Path newPath = path().concat(relPath);
-        NodeState parentState = getNodeState(sessionContext, newPath.getParent());
-        NodeState childState = parentState.addNode(newPath.getName());
+        TransientNodeState parentState = getNodeState(sessionContext, newPath.getParent());
+        TransientNodeState childState = parentState.addNode(newPath.getName());
         return create(sessionContext, childState);
     }
 
@@ -145,38 +145,38 @@ public class NodeImpl extends ItemImpl i
 
     @Override
     public void remove() throws RepositoryException {
-        nodeState.remove();
+        state.remove();
     }
 
     @Override
     public Property setProperty(String name, Value value, int type) throws RepositoryException
{
-        nodeState.setProperty(name, ValueConverter.toJsonValue(value));
+        state.setProperty(name, ValueConverter.toJsonValue(value));
         return getProperty(name);
     }
 
     @Override
     public Property setProperty(String name, Value[] values, int type) throws RepositoryException
{
-        nodeState.setProperty(name, ValueConverter.toJsonValue(values));
+        state.setProperty(name, ValueConverter.toJsonValue(values));
         return getProperty(name);
     }
 
     @Override
     public void setPrimaryType(String nodeTypeName) throws RepositoryException {
-        nodeState.setProperty("jcr:primaryType", JsonAtom.string(nodeTypeName));
+        state.setProperty("jcr:primaryType", JsonAtom.string(nodeTypeName));
     }
 
     @Override
     public void addMixin(String mixinName) throws RepositoryException {
-        JsonValue mixins = nodeState.getPropertyValue("jcr:mixinTypes");
+        JsonValue mixins = state.getPropertyValue("jcr:mixinTypes");
         mixins.asArray().add(JsonAtom.string(mixinName));
-        nodeState.setProperty("jcr:mixinTypes", mixins);
+        state.setProperty("jcr:mixinTypes", mixins);
     }
 
     @Override
     public void removeMixin(String mixinName) throws RepositoryException {
-        JsonValue mixins = nodeState.getPropertyValue("jcr:mixinTypes");
+        JsonValue mixins = state.getPropertyValue("jcr:mixinTypes");
         mixins.asArray().remove(JsonAtom.string(mixinName));
-        nodeState.setProperty("jcr:mixinTypes", mixins);
+        state.setProperty("jcr:mixinTypes", mixins);
     }
 
     
@@ -292,20 +292,20 @@ public class NodeImpl extends ItemImpl i
 
     @Override
     public boolean hasNodes() throws RepositoryException {
-        return nodeState.hasChildNodeStates();
+        return state.hasChildNodeStates();
     }
 
     @Override
     public NodeIterator getNodes() throws RepositoryException {
-        Iterator<NodeState> childNodeStates = nodeState.getChildNodeStates();
+        Iterator<TransientNodeState> childNodeStates = state.getChildNodeStates();
         return new NodeIteratorAdapter(nodeIterator(childNodeStates));
     }
 
     @Override
     public NodeIterator getNodes(final String namePattern) throws RepositoryException {
-        Iterator<NodeState> childNodeStates = nodeState.getChildNodeStates(new Predicate<NodeState>()
{
+        Iterator<TransientNodeState> childNodeStates = state.getChildNodeStates(new
Predicate<TransientNodeState>() {
             @Override
-            public boolean evaluate(NodeState nodeState) {
+            public boolean evaluate(TransientNodeState nodeState) {
                 return ItemNameMatcher.matches(nodeState.getName(), namePattern);
             }
         });
@@ -315,9 +315,9 @@ public class NodeImpl extends ItemImpl i
 
     @Override
     public NodeIterator getNodes(final String[] nameGlobs) throws RepositoryException {
-        Iterator<NodeState> childNodeStates = nodeState.getChildNodeStates(new Predicate<NodeState>()
{
+        Iterator<TransientNodeState> childNodeStates = state.getChildNodeStates(new
Predicate<TransientNodeState>() {
             @Override
-            public boolean evaluate(NodeState nodeState) {
+            public boolean evaluate(TransientNodeState nodeState) {
                 return ItemNameMatcher.matches(nodeState.getName(), nameGlobs);
             }
         });
@@ -337,18 +337,18 @@ public class NodeImpl extends ItemImpl i
 
     @Override
     public boolean hasProperties() throws RepositoryException {
-        return nodeState.hasProperties();
+        return state.hasProperties();
     }
 
     @Override
     public PropertyIterator getProperties() throws RepositoryException {
-        Iterator<Entry<String,JsonValue>> properties = nodeState.getProperties();
+        Iterator<Entry<String,JsonValue>> properties = state.getProperties();
         return new PropertyIteratorAdapter(propertyIterator(properties));
     }
 
     @Override
     public PropertyIterator getProperties(final String namePattern) throws RepositoryException
{
-        Iterator<Entry<String, JsonValue>> properties = nodeState.getProperties(
+        Iterator<Entry<String, JsonValue>> properties = state.getProperties(
             new Predicate<Entry<String, JsonValue>>() {
                 @Override
                 public boolean evaluate(Entry<String, JsonValue> entry) {
@@ -361,7 +361,7 @@ public class NodeImpl extends ItemImpl i
 
     @Override
     public PropertyIterator getProperties(final String[] nameGlobs) throws RepositoryException
{
-        Iterator<Entry<String, JsonValue>> propertyNames = nodeState.getProperties(
+        Iterator<Entry<String, JsonValue>> propertyNames = state.getProperties(
                 new Predicate<Entry<String, JsonValue>>() {
                     @Override
                     public boolean evaluate(Entry<String, JsonValue> entry) {
@@ -577,24 +577,24 @@ public class NodeImpl extends ItemImpl i
 
     //------------------------------------------< private >---
 
-    private static NodeState getNodeState(Context sessionContext, Path path) throws PathNotFoundException
{
-        NodeState nodeState = NodeState.getNodeState(sessionContext, path);
-        if (nodeState == null) {
+    private static TransientNodeState getNodeState(Context sessionContext, Path path) throws
PathNotFoundException {
+        TransientNodeState state = TransientNodeState.getNodeState(sessionContext, path);
+        if (state == null) {
             throw new PathNotFoundException(path.toJcrPath());
         }
 
-        return nodeState;
+        return state;
     }
 
     private Path path() {
-        return nodeState.getPath();
+        return state.getPath();
     }
 
-    private Iterator<Node> nodeIterator(Iterator<NodeState> childNodeStates)
{
-        return Iterators.transformIterator(childNodeStates, new Transformer<NodeState,
Node>() {
+    private Iterator<Node> nodeIterator(Iterator<TransientNodeState> childNodeStates)
{
+        return Iterators.transformIterator(childNodeStates, new Transformer<TransientNodeState,
Node>() {
             @Override
-            public Node transform(NodeState nodeState) {
-                return NodeImpl.create(sessionContext, nodeState);
+            public Node transform(TransientNodeState state) {
+                return NodeImpl.create(sessionContext, state);
             }
         });
     }
@@ -603,7 +603,7 @@ public class NodeImpl extends ItemImpl i
         return Iterators.transformIterator(properties, new Transformer<Entry<String,
JsonValue>, Property>() {
             @Override
             public Property transform(Entry<String, JsonValue> entry) {
-                return PropertyImpl.create(sessionContext, nodeState, entry.getKey(), entry.getValue());
+                return PropertyImpl.create(sessionContext, state, entry.getKey(), entry.getValue());
             }
         });
     }

Modified: jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/PropertyImpl.java
URL: http://svn.apache.org/viewvc/jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/PropertyImpl.java?rev=1298888&r1=1298887&r2=1298888&view=diff
==============================================================================
--- jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/PropertyImpl.java
(original)
+++ jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/PropertyImpl.java
Fri Mar  9 15:49:56 2012
@@ -21,7 +21,7 @@ package org.apache.jackrabbit;
 
 import org.apache.jackrabbit.SessionImpl.Context;
 import org.apache.jackrabbit.json.JsonValue;
-import org.apache.jackrabbit.state.NodeState;
+import org.apache.jackrabbit.state.TransientNodeState;
 import org.apache.jackrabbit.utils.ValueConverter;
 
 import javax.jcr.Binary;
@@ -43,19 +43,19 @@ import java.math.BigDecimal;
 import java.util.Calendar;
 
 public class PropertyImpl extends ItemImpl implements Property {
-    private final NodeState parentState;
+    private final TransientNodeState parentState;
     private final String name;
     private final JsonValue value;
 
     public static boolean exist(Context sessionContext, Path path) {
-        NodeState parentState = NodeState.getNodeState(sessionContext, path.getParent());
+        TransientNodeState parentState = TransientNodeState.getNodeState(sessionContext,
path.getParent());
         return parentState != null && parentState.hasProperty(path.getName());
     }
 
     static Property create(Context sessionContext, Path path) throws PathNotFoundException,
             ItemNotFoundException {
 
-        NodeState parentState = NodeState.getNodeState(sessionContext, path.getParent());
+        TransientNodeState parentState = TransientNodeState.getNodeState(sessionContext,
path.getParent());
         if (parentState == null) {
             throw new PathNotFoundException(path.toJcrPath());
         }
@@ -65,11 +65,11 @@ public class PropertyImpl extends ItemIm
         return new PropertyImpl(sessionContext, parentState, name, value);
     }
 
-    static Property create(Context sessionContext, NodeState parentState, String name, JsonValue
value) {
+    static Property create(Context sessionContext, TransientNodeState parentState, String
name, JsonValue value) {
         return new PropertyImpl(sessionContext, parentState, name, value);
     }
 
-    private PropertyImpl(Context sessionContext, NodeState parentState, String name, JsonValue
value) {
+    private PropertyImpl(Context sessionContext, TransientNodeState parentState, String name,
JsonValue value) {
         super(sessionContext);
         this.parentState = parentState;
         this.name = name;

Modified: jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/SessionImpl.java
URL: http://svn.apache.org/viewvc/jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/SessionImpl.java?rev=1298888&r1=1298887&r2=1298888&view=diff
==============================================================================
--- jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/SessionImpl.java
(original)
+++ jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/SessionImpl.java
Fri Mar  9 15:49:56 2012
@@ -23,7 +23,7 @@ import org.apache.jackrabbit.configurati
 import org.apache.jackrabbit.mk.api.MicroKernel;
 import org.apache.jackrabbit.security.Authenticator;
 import org.apache.jackrabbit.security.CredentialsInfo;
-import org.apache.jackrabbit.state.NodeState;
+import org.apache.jackrabbit.state.TransientNodeState;
 import org.apache.jackrabbit.state.NodeStateCache;
 import org.apache.jackrabbit.state.TransientSpace;
 import org.xml.sax.ContentHandler;
@@ -256,7 +256,7 @@ public class SessionImpl implements Sess
         checkLive();
         
         Path sourcePath = Path.create(workspaceName, srcAbsPath);
-        NodeState sourceParent = NodeState.getNodeState(sessionContext, sourcePath.getParent());
+        TransientNodeState sourceParent = TransientNodeState.getNodeState(sessionContext,
sourcePath.getParent());
         if (sourceParent == null) {
             throw new PathNotFoundException(srcAbsPath);
         }

Modified: jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeStateCache.java
URL: http://svn.apache.org/viewvc/jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeStateCache.java?rev=1298888&r1=1298887&r2=1298888&view=diff
==============================================================================
--- jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeStateCache.java
(original)
+++ jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeStateCache.java
Fri Mar  9 15:49:56 2012
@@ -22,8 +22,8 @@ package org.apache.jackrabbit.state;
 import org.apache.jackrabbit.Path;
 
 public interface NodeStateCache {
-    NodeState get(Path path);
-    void put(Path path, NodeState nodeState);
+    TransientNodeState get(Path path);
+    void put(Path path, TransientNodeState state);
     void remove(Path path);
     void clear();
 }

Modified: jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeStateCacheImpl.java
URL: http://svn.apache.org/viewvc/jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeStateCacheImpl.java?rev=1298888&r1=1298887&r2=1298888&view=diff
==============================================================================
--- jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeStateCacheImpl.java
(original)
+++ jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeStateCacheImpl.java
Fri Mar  9 15:49:56 2012
@@ -38,12 +38,12 @@ public class NodeStateCacheImpl implemen
 
     private static final NodeStateCache NO_CACHE = new NodeStateCache() {
         @Override
-        public NodeState get(Path path) {
+        public TransientNodeState get(Path path) {
             return null;
         }
 
         @Override
-        public void put(Path path, NodeState nodeState) { }
+        public void put(Path path, TransientNodeState state) { }
 
         @Override
         public void remove(Path path) { }
@@ -52,20 +52,20 @@ public class NodeStateCacheImpl implemen
         public void clear() { }
     };
 
-    private final Map<Path, NodeState> cache;
+    private final Map<Path, TransientNodeState> cache;
 
     public NodeStateCacheImpl(int size) {
         cache = Unchecked.cast(new LRUMap(size));
     }
 
     @Override
-    public NodeState get(Path path) {
+    public TransientNodeState get(Path path) {
         return cache.get(path);
     }
 
     @Override
-    public void put(Path path, NodeState nodeState) {
-        cache.put(path, nodeState);
+    public void put(Path path, TransientNodeState state) {
+        cache.put(path, state);
     }
 
     @Override

Copied: jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/TransientNodeState.java
(from r1298846, jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeState.java)
URL: http://svn.apache.org/viewvc/jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/TransientNodeState.java?p2=jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/TransientNodeState.java&p1=jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeState.java&r1=1298846&r2=1298888&rev=1298888&view=diff
==============================================================================
--- jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/NodeState.java
(original)
+++ jackrabbit/sandbox/jackrabbit-microkernel/src/main/java/org/apache/jackrabbit/state/TransientNodeState.java
Fri Mar  9 15:49:56 2012
@@ -40,14 +40,14 @@ import java.util.Iterator;
 import java.util.Map;
 import java.util.Map.Entry;
 
-public class NodeState {
+public class TransientNodeState {
     private final Context sessionContext;
     private final Provider<NodeDelta> nodeDelta;
 
     private String revision;
     private JsonObject jsonObject;
 
-    private NodeState(Context sessionContext, final NodeDelta nodeDelta) {
+    private TransientNodeState(Context sessionContext, final NodeDelta nodeDelta) {
         this.sessionContext = sessionContext;
 
         this.nodeDelta = new Provider<NodeDelta>() {
@@ -82,7 +82,7 @@ public class NodeState {
         return nodeDelta.get().isTransient();
     }
 
-    public NodeState addNode(String name) throws ItemExistsException {
+    public TransientNodeState addNode(String name) throws ItemExistsException {
         NodeDelta child = nodeDelta.get().addNode(name);
         return getNodeState(sessionContext, child);
     }
@@ -106,7 +106,7 @@ public class NodeState {
         return getChildNodeStates().hasNext();
     }
 
-    public Iterator<NodeState> getChildNodeStates() {
+    public Iterator<TransientNodeState> getChildNodeStates() {
         Map<String, JsonValue> childEntries = getJsonObject().value();
 
         Iterator<Entry<String, JsonValue>> childNodeEntries =
@@ -118,18 +118,18 @@ public class NodeState {
                         }
                     });
 
-        Iterator<NodeState> childNodeStates = Iterators.transformIterator(childNodeEntries,
-            new Transformer<Entry<String, JsonValue>, NodeState>() {
+        Iterator<TransientNodeState> childNodeStates = Iterators.transformIterator(childNodeEntries,
+            new Transformer<Entry<String, JsonValue>, TransientNodeState>() {
                 @Override
-                public NodeState transform(Entry<String, JsonValue> entry) {
+                public TransientNodeState transform(Entry<String, JsonValue> entry)
{
                     return getNodeState(sessionContext, nodeDelta.get().getNode(entry.getKey()));
                 }
         });
 
-        Iterator<NodeState> modifiedNodeStates = Iterators.transformIterator(nodeDelta.get().getNodes(),
-            new Transformer<NodeDelta, NodeState>() {
+        Iterator<TransientNodeState> modifiedNodeStates = Iterators.transformIterator(nodeDelta.get().getNodes(),
+            new Transformer<NodeDelta, TransientNodeState>() {
                 @Override
-                public NodeState transform(NodeDelta delta) {
+                public TransientNodeState transform(NodeDelta delta) {
                     return getNodeState(sessionContext, delta);
                 }
         });
@@ -137,7 +137,7 @@ public class NodeState {
         return Iterators.iteratorChain(childNodeStates, modifiedNodeStates);
     }
 
-    public Iterator<NodeState> getChildNodeStates(Predicate<NodeState> condition)
{
+    public Iterator<TransientNodeState> getChildNodeStates(Predicate<TransientNodeState>
condition) {
         return Iterators.filterIterator(getChildNodeStates(), condition);
     }
 
@@ -191,7 +191,7 @@ public class NodeState {
         nodeDelta.get().setValue(name, null);
     }
 
-    public static NodeState getNodeState(Context sessionContext, Path path) {
+    public static TransientNodeState getNodeState(Context sessionContext, Path path) {
         NodeDelta delta = sessionContext.getTransientSpace().getNodeDelta(path);
         return delta == null ? null : getNodeState(sessionContext, delta);
     }
@@ -223,16 +223,16 @@ public class NodeState {
         return sessionContext.getTransientSpace();
     }
     
-    private static NodeState getNodeState(Context sessionContext, NodeDelta nodeDelta) {
+    private static TransientNodeState getNodeState(Context sessionContext, NodeDelta nodeDelta)
{
         NodeStateCache cache = sessionContext.getNodeStateCache();
         Path path = nodeDelta.getPath();
 
-        NodeState nodeState = cache.get(path);
-        if (nodeState == null) {
-            nodeState = new NodeState(sessionContext, nodeDelta);
-            cache.put(path, nodeState);
+        TransientNodeState state = cache.get(path);
+        if (state == null) {
+            state = new TransientNodeState(sessionContext, nodeDelta);
+            cache.put(path, state);
         }
-        return nodeState;
+        return state;
     }
 
     private static boolean isNode(JsonValue value) {



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