Changeset 32491 for main/trunk/greenstone3/src/java/org/greenstone/gsdl3/util/XMLTransformer.java

Timestamp:

2018-09-25T13:03:50+12:00 (6 years ago)

Author:

kjdon

Message:

added a new transform method for 2 files where you can pass in the entityresolver. this will help the transform to locate dtds etc. eg for gberg coll, the code is looking in tomcat/bin folder for gutbook.dtd. don't know why this is, or why it has changed from before. Anyway, we need to use XMLReader and give it the entityresolver to locate the dtd (from the resources folder in the collection)

File:

• main/trunk/greenstone3/src/java/org/greenstone/gsdl3/util/XMLTransformer.java (modified) (5 diffs)

main/trunk/greenstone3/src/java/org/greenstone/gsdl3/util/XMLTransformer.java

@@ -59 +59 @@
 import org.w3c.dom.Node;
 
+import org.xml.sax.XMLReader;
+import org.xml.sax.EntityResolver;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+import javax.xml.transform.sax.SAXSource;
+import org.xml.sax.helpers.XMLReaderFactory;
 /**
  * XMLTransformer - utility class for greenstone
@@ -64 +70 @@
  * transforms xml using xslt
  * 
- * @author Katherine Don
- * @version $Revision$
  */
 public class XMLTransformer
@@ -231 +235 @@
     protected Node transform(Document stylesheet, Document source, HashMap<String, Object> parameters, Document docDocType, Document resultNode)
     {
+             
         try
         {
@@ -470 +475 @@
     }
 
+  /** transform method for when the source doc may contain DTD references. eg in gberg collection - the files are kind of outside of greenstone.
+   * pass in an entity resolver, and it will be used by the XMLReader */
+  public Node transform(File stylesheet, File source,  Document docDocType, EntityResolver er)
+  {
+        try
+        {
+          TransformErrorListener transformerErrorListener = (TransformErrorListener) this.t_factory.getErrorListener();
+            transformerErrorListener.setStylesheet(stylesheet);
+            Transformer transformer = this.t_factory.newTransformer(new StreamSource(new InputStreamReader(new FileInputStream(stylesheet), "UTF-8")));
+            DOMResult result =  (docDocType == null) ? new DOMResult() : new DOMResult(docDocType);
+
+            XMLReader reader = XMLReaderFactory.createXMLReader();
+            reader.setEntityResolver(er);
+            SAXSource xmlSource = new SAXSource(reader, new InputSource(new InputStreamReader(new FileInputStream(source), "UTF-8")));
+        
+            transformer.setErrorListener(new TransformErrorListener(stylesheet, xmlSource)); 
+
+            transformer.transform(xmlSource, result); 
+            return result.getNode().getFirstChild();
+        }
+        catch (SAXException e)
+          {
+            return transformError("XMLTransformer.transform(File, File), couldn't create XMLReader for source\n"+ source, e);
+          }
+        catch (TransformerConfigurationException e)
+        {
+            return transformError("XMLTransformer.transform(File, File)" + "\ncouldn't create transformer object for files\n" + stylesheet + "\n" + source, e);
+        }
+        catch (TransformerException e)
+        {
+            return transformError("XMLTransformer.transform(File, File)" + "\ncouldn't transform the source for files\n" + stylesheet + "\n" + source, e);
+        }
+        catch (UnsupportedEncodingException e)
+        {
+            return transformError("XMLTransformer.transform(File, File)" + "\ncouldn't read file due to an unsupported encoding\n" + stylesheet + "\n" + source, e);
+        }
+        catch (FileNotFoundException e)
+        {
+            return transformError("XMLTransformer.transform(File, File)" + "\ncouldn't find the file specified\n" + stylesheet + "\n" + source, e);
+        }
+    }
     // debugAsFile is only to be set to true when either the stylesheet or source parameters 
     // are not objects of type File. The debugAsFile variable is passed into the 
@@ -479 +525 @@
         try
         {
-            TransformErrorListener transformerErrorListener = (TransformErrorListener) this.t_factory.getErrorListener();
+                TransformErrorListener transformerErrorListener = (TransformErrorListener) this.t_factory.getErrorListener();
             transformerErrorListener.setStylesheet(stylesheet);
             Transformer transformer = this.t_factory.newTransformer(new StreamSource(new InputStreamReader(new FileInputStream(stylesheet), "UTF-8")));