[Patch] session-info for TraxTransformer

[J�rn Heid]

This patch offers the possibility to add session-infos (e.g. the session id,
if it's new, if the session is from url or cookie (see javadoc for the
infos)) to the xslt transformers (like those use-request-parameter or
se-browser-capabilities-db).

Default is of course off.

For me, I think it's quite useful although I do not know if this fits into
the discussion about session handling. As it's optional, the developer can
decide.

JOERN

Index: src/org/apache/cocoon/transformation/TraxTransformer.java
===================================================================
RCS file: 
/home/cvspublic/xml-cocoon2/src/org/apache/cocoon/transformation/TraxTransformer.java,v
retrieving revision 1.15.2.19
diff -u -b -r1.15.2.19 TraxTransformer.java
--- src/org/apache/cocoon/transformation/TraxTransformer.java   2001/11/06 10:47:44    
 1.15.2.19
+++ src/org/apache/cocoon/transformation/TraxTransformer.java   2001/11/11 10:40:26
@@ -25,6 +25,7 @@
 import org.apache.cocoon.caching.TimeStampCacheValidity;
 import org.apache.cocoon.components.browser.Browser;
 import org.apache.cocoon.components.xslt.XSLTProcessor;
+import org.apache.cocoon.environment.Session;
 import org.apache.cocoon.environment.Cookie;
 import org.apache.cocoon.environment.Request;
 import org.apache.cocoon.environment.Source;
@@ -49,6 +50,7 @@
  * <map:transformer name="xslt" 
src="org.apache.cocoon.transformation.TraxTransformer"&gt;<br>
  *   &lt;use-request-parameters&gt;false&lt;/use-request-parameters&gt;
  *   &lt;use-browser-capabilities-db&gt;false&lt;/use-browser-capabilities-db&gt;
+ *   &lt;use-session-info&gt;false&lt;/use-session-info&gt;
  *   
&lt;xslt-processor-role&gt;org.apache.cocoon.components.xslt.XSLTProcessor&lt;/xslt-processor-role&gt;
  * &lt;/map:transformer&gt;
  * </pre>
@@ -69,7 +71,16 @@
  * Note that this might have issues concerning cachability of the generated output of 
this
  * transformer.<br>
  * This property is false by default.
+ * <p>
+ * The &lt;use-session-info&gt; configuration forces the transformer to make all
+ * of the session information available in the XSLT stylesheetas.<br>
+ * These infos are (boolean values are "true" or "false" strings: session-is-new,
+ * session-id-from-cookie, session-id-from-url, session-valid, session-id.<br>
+ * Note that this might have issues concerning cachability of the generated output of 
+this
+ * transformer.<br>
+ * This property is false by default.
  *
+ *
  * The &lt;xslt-processor&gt; configuration allows to specify the XSLT processor that 
will be
  * used by its role name. This allows to have several XSLT processors in the 
configuration
  * (e.g. Xalan and Saxon) and choose one or the other depending on the needs of 
stylesheet
@@ -114,6 +125,10 @@
     private boolean useCookies = false;
     private boolean _useCookies = false;
 
+    /** Should we info about the session availalbe in the stylesheet? (default is 
+off) */
+    private boolean useSessionInfo = false;
+    private boolean _useSessionInfo = false;
+
     private ComponentManager manager;
 
     /** The trax TransformerHandler */
@@ -151,6 +166,12 @@
           this._useBrowserCap = this.useBrowserCap;
           getLogger().debug("Use browser capabilities is " + this.useBrowserCap + " 
for " + this);
           
+          child = conf.getChild("use-session-info");
+          this.useSessionInfo = child.getValueAsBoolean(false);
+          this._useSessionInfo = this.useSessionInfo;
+          getLogger().debug("Use session info is " + this.useSessionInfo + " for " + 
+this);
+
+
           child = conf.getChild("xslt-processor-role");
           String xsltRole = child.getValue(XSLTProcessor.ROLE);
           getLogger().debug("Use XSLTProcessor of role " + xsltRole);
@@ -194,6 +215,7 @@
         _useParameters = par.getParameterAsBoolean("use-request-parameters", 
this.useParameters);
         _useBrowserCap = par.getParameterAsBoolean("use-browser-capabilities-db", 
this.useBrowserCap);
         _useCookies = par.getParameterAsBoolean("use-cookies", this.useCookies);
+        _useSessionInfo = par.getParameterAsBoolean("use-session-info", 
+this.useSessionInfo);
     }
 
     /**
@@ -317,6 +339,21 @@
             }
         }
 
+        if (this._useSessionInfo) {
+            /** The Request object */
+            Request request = (Request) objectModel.get(Constants.REQUEST_OBJECT);
+            if (map == null) map = new HashMap(5);
+
+            if (request != null) {               
+               Session session = request.getSession(true);
+               map.put("session-is-new",session.isNew()?"true":"false");
+               
+map.put("session-id-from-cookie",request.isRequestedSessionIdFromCookie()?"true":"false");
+               
+map.put("session-id-from-url",request.isRequestedSessionIdFromURL()?"true":"false");
+               
+map.put("session-valid",request.isRequestedSessionIdValid()?"true":"false");
+               map.put("session-id",session.getId());
+            }
+        }
+
         if (this._useCookies) {
             Request request = (Request) objectModel.get(Constants.REQUEST_OBJECT);
             Cookie cookies[] = request.getCookies();
@@ -436,6 +473,7 @@
         this._useParameters = this.useParameters;
         this._useCookies = this.useCookies;
         this._useBrowserCap = this.useBrowserCap;
+        this._useSessionInfo = this.useSessionInfo;
         super.recycle();
     }
 }


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