Changeset 3451 for trunk

Timestamp:

2002-10-11T13:31:49+13:00 (22 years ago)

Author:

kjdon

Message:

new version of transform, with stylesheet already parsed into a Document

File:

• trunk/gsdl3/src/java/org/greenstone/gsdl3/util/XMLTransformer.java (modified) (7 diffs)

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

@@ -29 +29 @@
 import javax.xml.transform.stream.StreamResult;
 
+import org.w3c.dom.Document;
 import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
 
 // other java classes
 import java.io.StringReader;
 import java.io.StringWriter;
+import java.io.File;
 
-/** XMLConverter - utitlity class for greenstone
+/** XMLTransformer - utility class for greenstone
  *
- * parses XML Strings into Documents, converts Nodes to Strings
- * different parsers have different behaviour - can experiment in here
+ * transforms xml using xslt
  *
  * @author <a href="mailto:[email protected]">Katherine Don</a>
@@ -44 +46 @@
  */
 public class XMLTransformer {
-  /** The transformer we're using */
-  TransformerFactory t_factory_=null;
+
+  /** The transformer factory we're using */
+    TransformerFactory t_factory_=null;
   
   /**
@@ -57 +60 @@
     public XMLTransformer() {
 
-    //System.out.println("system property="+System.getProperty("javax.xml.transform.TransformerFactory"));
-
+    // make sure we are using the xalan transformer
     System.setProperty("javax.xml.transform.TransformerFactory", "org.apache.xalan.processor.TransformerFactoryImpl");
     try {
@@ -66 +68 @@
         System.out.println("XMLTransformer() exception "+e.getMessage());
     }
-    
-    //System.out.println("system property="+System.getProperty("javax.xml.transform.TransformerFactory"));
     }
 
@@ -75 +75 @@
    * Transform an XML document using a XSLT stylesheet
    * 
-   * @param stylesheet an XSLT stylesheet
+   * @param stylesheet a filename for an XSLT stylesheet
    * @param xml_in the XML to be transformed
    * @return the transformed XML
@@ -111 +111 @@
         return output.toString();
     } catch (TransformerConfigurationException e) {
+        System.err.println("XMLTransformer: couldn't create transformer object: "+e.getMessageAndLocation());
+        return "";
+    } catch (TransformerException e) {
+        System.err.println("XMLTransformer: couldn't transform the source: " + e.getMessage());
+        return "";
+    }   
+    }
+
+ 
+    public String transform(Document stylesheet, Node xml_in) {
+
+    try {
+        // Use the TransformerFactory to process the stylesheet Source and generate a Transformer.
+        Transformer transformer = t_factory_.newTransformer(new DOMSource(stylesheet));
+        
+        // Use the Transformer to transform an XML Source and send the output to a Result object.
+        StringWriter output = new StringWriter();
+        
+        transformer.transform(new DOMSource(xml_in), new StreamResult(output));
+        return output.toString();
+    } catch (TransformerConfigurationException e) {
         System.err.println("XMLTransformer: couldn't create transformer object: "+e.getMessage());
         return "";
@@ -118 +139 @@
     }   
     }
+
+    
 }