From 6775b5fc7de8884577533fa84ac703366539e043 Mon Sep 17 00:00:00 2001
From: abranson <andrew.branson@cern.ch>
Date: Tue, 13 Mar 2012 15:50:44 +0100
Subject: More efficient DOM handling, getField() utility method for scripts

---
 source/com/c2kernel/persistency/outcome/Outcome.java | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/source/com/c2kernel/persistency/outcome/Outcome.java b/source/com/c2kernel/persistency/outcome/Outcome.java
index a5ecb29..d321f69 100644
--- a/source/com/c2kernel/persistency/outcome/Outcome.java
+++ b/source/com/c2kernel/persistency/outcome/Outcome.java
@@ -11,6 +11,8 @@ import org.apache.xml.serialize.Method;
 import org.apache.xml.serialize.OutputFormat;
 import org.apache.xml.serialize.XMLSerializer;
 import org.w3c.dom.Document;
+import org.w3c.dom.NodeList;
+import org.w3c.dom.Text;
 import org.xml.sax.InputSource;
 
 import com.c2kernel.common.PersistencyException;
@@ -23,6 +25,7 @@ public class Outcome implements C2KLocalObject {
     String mData;
     String mSchemaType;
     int mSchemaVersion;
+    Document dom;
     static DocumentBuilder parser;
 
     static {
@@ -89,10 +92,12 @@ public class Outcome implements C2KLocalObject {
 
     public void setData(String data) {
         mData = data;
+        dom = null;
     }
 
     public void setData(Document data) {
         mData = serialize(data, false);
+        dom = data;
     }
 
     public String getData() {
@@ -131,14 +136,24 @@ public class Outcome implements C2KLocalObject {
      * @return a DOM Document
      */
     public Document getDOM() {
+    	if (dom == null)
         try {
             synchronized (parser) {
-                return parser.parse(new InputSource(new StringReader(mData)));
+                dom = parser.parse(new InputSource(new StringReader(mData)));
             }
         } catch (Exception e) {
             Logger.error(e);
             return null;
         }
+    	return dom;
+    }
+    
+    public String getField(String name) {
+    	 NodeList elements = getDOM().getDocumentElement().getElementsByTagName(name);
+    	 if (elements.getLength() == 1 && elements.item(0).hasChildNodes() && elements.item(0).getFirstChild() instanceof Text)
+    		 return ((Text)elements.item(0).getFirstChild()).getData();
+    	 else
+    		 return null;
     }
 
     static public String serialize(Document doc, boolean prettyPrint)
-- 
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