Changeset 27090 for main/trunk/greenstone3/src/java/org/greenstone/gsdl3/util/XMLTransformer.java

Timestamp:

2013-03-15T14:09:47+13:00 (11 years ago)

Author:

ak19

Message:

Now XMLTransformer sets the doctype of the document generated from what the transformer object has worked this out to be from (merged) stylesheets. Now TransformingReceptionist no longer generates a new document with a doctype (that it has to work out from merged stylesheets) to pass into XMLTransformer.transform().

File:

• main/trunk/greenstone3/src/java/org/greenstone/gsdl3/util/XMLTransformer.java (modified) (3 diffs)

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

@@ -36 +36 @@
 import java.util.Iterator;
 import java.util.Map;
+import java.util.Properties;
 import java.util.Set;
 
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.transform.ErrorListener;
+import javax.xml.transform.OutputKeys;
 import javax.xml.transform.Source;
 import javax.xml.transform.Transformer;
@@ -225 +227 @@
     }
 
+    // This method will now set the docType in the new document created and returned, if any are specified in the
+    // (merged) stylesheet being applied. The docDocType parameter is therefore no longer necessary nor used by default.
     protected Node transform(Document stylesheet, Document source, HashMap<String, Comparable> parameters, Document docDocType, Document resultNode)
     {
@@ -249 +253 @@
             // the transformation has a DocType. For that to happen, we need to create
             // the DOMResult using a Document with a predefined docType.
-            // If we don't have a DocType then do the transformation with a DOMResult
-            // that does not contain any doctype (like we use to do before).
-            DOMResult result = docDocType == null ? new DOMResult() : new DOMResult(docDocType);
+
+            // When the DOCType is not explicitly specified (default case), the docDocType variable is null
+            // In such a case, the transformer will work out the docType and output method and the rest 
+            // from the stylesheet. Better to let the transformer work this out than GS manually aggregating 
+            // all xsls being applied and the GS code deciding on which output method and doctype to use.
+
+            //DOMResult result = docDocType == null ? new DOMResult() : new DOMResult(docDocType);
+            DOMResult result = null;
+
+            Properties props = transformer.getOutputProperties();
+            if(docDocType == null) { // default case
+            
+                String outputMethod = props.getProperty(OutputKeys.METHOD);
+                if(outputMethod.equals("html")) {               
+                String doctype_public = props.getProperty(OutputKeys.DOCTYPE_PUBLIC);
+                String doctype_system = props.getProperty(OutputKeys.DOCTYPE_SYSTEM);
+                
+                if(doctype_public == null) {
+                    doctype_public = ""; // or default to PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"?
+                }
+                if(doctype_system == null) {
+                    doctype_system = ""; // or default to "http://www.w3.org/TR/html4/loose.dtd"?
+                }
+
+                Document docDocTypeFromTransformer = XMLConverter.newDOM(outputMethod, doctype_public, doctype_system);
+                result = new DOMResult(docDocTypeFromTransformer);
+                } 
+                // if output method=xml, the <?xml ?> processing method goes missing hereafter, although it
+                // still exists in OutputKeys' VERSION, ENCODING and OMIT_XML_DECLARATION props at this point
+                        
+            } else { // if document with doctype was already specified (no longer the default case)
+                result = new DOMResult(docDocType);
+            }
+            // At this point if we haven't initialised result yet, set it to an empty DOMResult
+            if(result == null) {
+                result = new DOMResult();
+            }
+
+
             if (resultNode != null)
             {