From 5b8fc241bf035c779335b0720369a1077deab317 Mon Sep 17 00:00:00 2001
From: Yegor Kozlov <yegor@apache.org>
Date: Fri, 14 Aug 2009 17:25:22 +0000
Subject: [PATCH] improved loading of package parts so that same logical parts
 correspond to the same physical instances, see followup in Bugzilla 47668

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@804303 13f79535-47bb-0310-9956-ffa450edef68
---
 .../java/org/apache/poi/POIXMLDocument.java     |  4 ++--
 .../java/org/apache/poi/POIXMLDocumentPart.java | 17 ++++++++++-------
 2 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/src/ooxml/java/org/apache/poi/POIXMLDocument.java b/src/ooxml/java/org/apache/poi/POIXMLDocument.java
index a4da9c77b2..9e716e4cc8 100644
--- a/src/ooxml/java/org/apache/poi/POIXMLDocument.java
+++ b/src/ooxml/java/org/apache/poi/POIXMLDocument.java
@@ -192,7 +192,7 @@ public abstract class POIXMLDocument extends POIXMLDocumentPart{
     }
 
     protected final void load(POIXMLFactory factory) throws IOException {
-    	Map<PackageRelationship, POIXMLDocumentPart> context = new HashMap<PackageRelationship, POIXMLDocumentPart>();
+    	Map<PackagePart, POIXMLDocumentPart> context = new HashMap<PackagePart, POIXMLDocumentPart>();
         try {
             read(factory, context);
         } catch (OpenXML4JException e){
@@ -211,7 +211,7 @@ public abstract class POIXMLDocument extends POIXMLDocumentPart{
      */
     public final void write(OutputStream stream) throws IOException {
         //force all children to commit their changes into the underlying OOXML Package
-        Set<PackageRelationship> context = new HashSet<PackageRelationship>();
+        Set<PackagePart> context = new HashSet<PackagePart>();
         onSave(context);
         context.clear();
 
diff --git a/src/ooxml/java/org/apache/poi/POIXMLDocumentPart.java b/src/ooxml/java/org/apache/poi/POIXMLDocumentPart.java
index 487bf533b8..6fccf1cb51 100755
--- a/src/ooxml/java/org/apache/poi/POIXMLDocumentPart.java
+++ b/src/ooxml/java/org/apache/poi/POIXMLDocumentPart.java
@@ -170,12 +170,14 @@ public class POIXMLDocumentPart {
     /**
      * Save changes in the underlying OOXML package.
      * Recursively fires {@link #commit()} for each package part
+     *
+     * @param alreadySaved    context set containing already visited nodes
      */
-    protected final void onSave(Set<PackageRelationship> alreadySaved) throws IOException{
+    protected final void onSave(Set<PackagePart> alreadySaved) throws IOException{
     	commit();
-    	alreadySaved.add(this.getPackageRelationship());
+    	alreadySaved.add(this.getPackagePart());
     	for(POIXMLDocumentPart p : relations){
-    		if (!alreadySaved.contains(p.getPackageRelationship())) {
+            if (!alreadySaved.contains(p.getPackagePart())) {
     			p.onSave(alreadySaved);
     		}
     	}
@@ -229,8 +231,9 @@ public class POIXMLDocumentPart {
      * using the specified factory
      *
      * @param factory   the factory object that creates POIXMLFactory instances
+     * @param context   context map containing already visited noted keyed by targetURI
      */
-    protected void read(POIXMLFactory factory, Map<PackageRelationship, POIXMLDocumentPart> context) throws OpenXML4JException {
+    protected void read(POIXMLFactory factory, Map<PackagePart, POIXMLDocumentPart> context) throws OpenXML4JException {
     	PackageRelationshipCollection rels = packagePart.getRelationships();
     	for (PackageRelationship rel : rels) {
     		if(rel.getTargetMode() == TargetMode.INTERNAL){
@@ -251,17 +254,17 @@ public class POIXMLDocumentPart {
                     }
                 }
 
-                if (!context.containsKey(rel)) {
+                if (!context.containsKey(p)) {
     				POIXMLDocumentPart childPart = factory.createDocumentPart(rel, p);
     				childPart.parent = this;
     				addRelation(childPart);
                     if(p != null){
-                        context.put(rel, childPart);
+                        context.put(p, childPart);
                         if(p.hasRelationships()) childPart.read(factory, context);
                     }
     			}
     			else {
-    				addRelation(context.get(rel));
+    				addRelation(context.get(p));
     			}
     		}
     	}
-- 
2.39.5