Method read

src/ooxml/java/org/apache/poi/POIXMLDocumentPart.java:255–290

Iterate through the underlying PackagePart and create child POIXMLFactory instances using the specified factory @param factory the factory object that creates POIXMLFactory instances @param context context map containing already visited noted keyed by targetURI

(POIXMLFactory factory, Map<PackagePart, POIXMLDocumentPart> context)

     * @param context   context map containing already visited noted keyed by targetURI
     */
    protected void read(POIXMLFactory factory, Map<PackagePart, POIXMLDocumentPart> context) throws OpenXML4JException {
    	PackageRelationshipCollection rels = packagePart.getRelationships();
    	for (PackageRelationship rel : rels) {
    		if(rel.getTargetMode() == TargetMode.INTERNAL){
                URI uri = rel.getTargetURI();

                PackagePart p;
                if(uri.getRawFragment() != null) {
                    /*
                     * For internal references (e.g. '#Sheet1!A1') the package part is null
                     */
                    p = null;
                } else {
                    PackagePartName relName = PackagingURIHelper.createPartName(uri);
                    p = packagePart.getPackage().getPart(relName);
                    if(p == null) {
                        logger.log(POILogger.ERROR, "Skipped invalid entry " + rel.getTargetURI());
                        continue;
                    }
                }

                if (!context.containsKey(p)) {
    				POIXMLDocumentPart childPart = factory.createDocumentPart(rel, p);
    				childPart.parent = this;
    				addRelation(childPart);
                    if(p != null){
                        context.put(p, childPart);
                        if(p.hasRelationships()) childPart.read(factory, context);
                    }
    			}
    			else {
    				addRelation(context.get(p));
    			}
    		}
    	}
    }

    /**
     * Fired when a new package part is created