Before parsing an OOXML document, reset the xmlbeans sax parser to avoid the risk of getting one in an error state (due to XMLBEANS-512). Should be a minimal extra overhead pending a proper fix. Allows us to finish enabling the unit tests for #54764

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1615781 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/POIXMLDocument.java

 import org.apache.poi.openxml4j.opc.PackageRelationshipCollection;
 import org.apache.poi.poifs.common.POIFSConstants;
 import org.apache.poi.util.IOUtils;
+import org.apache.xmlbeans.impl.common.SystemCache;
 
 public abstract class POIXMLDocument extends POIXMLDocumentPart{
     public static final String DOCUMENT_CREATOR = "Apache POI";
     protected POIXMLDocument(OPCPackage pkg) {
         super(pkg);
         this.pkg = pkg;
+        
+        // Workaround for XMLBEANS-512 - ensure that when we parse
+        //  the file, we start with a fresh XML Parser each time,
+        //  and avoid the risk of getting a SaxHandler that's in error
+        SystemCache.get().setSaxLoader(null);
     }
 
     /**

src/ooxml/java/org/apache/poi/xssf/model/SharedStringsTable.java

 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
+import org.apache.poi.POIXMLDocumentPart;
+import org.apache.poi.openxml4j.opc.PackagePart;
+import org.apache.poi.openxml4j.opc.PackageRelationship;
 import org.apache.xmlbeans.XmlException;
 import org.apache.xmlbeans.XmlOptions;
-import org.apache.poi.POIXMLDocumentPart;
 import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTRst;
 import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTSst;
 import org.openxmlformats.schemas.spreadsheetml.x2006.main.SstDocument;
-import org.apache.poi.openxml4j.opc.PackagePart;
-import org.apache.poi.openxml4j.opc.PackageRelationship;
 
 
 /**

src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFBugs.java

 import org.apache.poi.EncryptedDocumentException;
 import org.apache.poi.POIDataSamples;
 import org.apache.poi.POIXMLDocumentPart;
+import org.apache.poi.POIXMLException;
 import org.apache.poi.POIXMLProperties;
 import org.apache.poi.hssf.HSSFTestDataSamples;
 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
         assertEquals(null, props.getCoreProperties().getDescription());
         
         // Now check the spreadsheet itself
-        // TODO Fix then enable
-/*        
         try {
             new XSSFWorkbook(pkg);
             fail("Should fail as too much expansion occurs");
         } catch(POIXMLException e) {
             // Expected
-        } */
+        }
         
         // Try with one with the entities in the Content Types
         try {
         } catch(Exception e) {
             // Expected
         }
+        
+        // Check we can still parse valid files after all that
+        Workbook wb = XSSFTestDataSamples.openSampleWorkbook("sample.xlsx");
+        assertEquals(3, wb.getNumberOfSheets());
     }
     
     /**