[gate-cvs] SF.net SVN: gate:[14553] mimir/trunk/mimir-core/src/gate/mimir/IndexConfig. java

[valyt]

Revision: 14553
          http://gate.svn.sourceforge.net/gate/?rev=14553&view=rev
Author:   valyt
Date:     2011-11-15 16:15:05 +0000 (Tue, 15 Nov 2011)
Log Message:
-----------
Support for format version in index config.

Modified Paths:
--------------
    mimir/trunk/mimir-core/src/gate/mimir/IndexConfig.java

Modified: mimir/trunk/mimir-core/src/gate/mimir/IndexConfig.java
===================================================================
--- mimir/trunk/mimir-core/src/gate/mimir/IndexConfig.java      2011-11-15 
16:13:37 UTC (rev 14552)
+++ mimir/trunk/mimir-core/src/gate/mimir/IndexConfig.java      2011-11-15 
16:15:05 UTC (rev 14553)
@@ -166,6 +166,12 @@
    * 
    */
   private static final long serialVersionUID = -8127630936829037489L;
+  
+  /**
+   * The current format version for the XML files containing serialisations of 
+   * IndexConfig instances.
+   */
+  private static final int FORMAT_VERSION = 4;
 
   /**
    * The default feature name for obtaining document URIs (provided as features
@@ -227,6 +233,7 @@
           DocumentRenderer documentRenderer) {
     
     this.indexDirectory = indexDirectory;
+    this.formatVersion = FORMAT_VERSION;
     this.tokenAnnotationSetName = tokenAnnotationSetName;
     this.tokenAnnotationType = tokenAnnotationType;
     this.tokenIndexers = tokenIndexers;
@@ -411,7 +418,16 @@
               inputFactory.createXMLStreamReader(configStream);
       HierarchicalStreamReader xmlReader = new StaxReader(new QNameMap(), xsr);
       try {
-        return (IndexConfig)newXStream().unmarshal(xmlReader);
+        IndexConfig theConfig = (IndexConfig)newXStream().unmarshal(xmlReader);
+        // check the version number
+        if(theConfig.formatVersion > FORMAT_VERSION){
+          throw new UnsupportedOperationException(
+            "The version of the IndexConfig at \"" + u.toExternalForm() + 
+            "\" is greater than the maximum supported version by this Mímir " +
+            "implementation (" + theConfig.formatVersion + " > " + 
FORMAT_VERSION +
+            ").");
+        }
+        return theConfig;
       } finally {
         xmlReader.close();
         configStream.close();
@@ -475,6 +491,11 @@
   private File indexDirectory;
 
   /**
+   * The format version for this index config instance.
+   */
+  private int formatVersion;
+  
+  /**
    * The annotation type used for tokens.
    */
   private String tokenAnnotationType;

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