Checkin for RSOLR 031: "Remote API to get and compare models"

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@28472 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/solr/AlfrescoModelDiff.java

@@ -0,0 +1,52 @@
+package org.alfresco.repo.solr;
+
+import org.alfresco.service.namespace.QName;
+
+/**
+ * Represents a diff between the set of current repository Alfresco models and the set maintained in SOLR.
+ * The diff can represent a new, changed or removed Alfresco model. For a new model the newChecksum is
+ * populated; for a changed model both checksums are populated; for a removed model neither checksum is populated.
+ * 
+ * @since 4.0
+ */
+public class AlfrescoModelDiff
+{
+    public static enum TYPE
+    {
+        NEW, CHANGED, REMOVED;
+    };
+    
+    private QName modelName;
+    private TYPE type;
+    private Long oldChecksum;
+    private Long newChecksum;
+
+    public AlfrescoModelDiff(QName modelName, TYPE type, Long oldChecksum, Long newChecksum)
+    {
+        super();
+        this.modelName = modelName;
+        this.type = type;
+        this.oldChecksum = oldChecksum;
+        this.newChecksum = newChecksum;
+    }
+
+    public QName getModelName()
+    {
+        return modelName;
+    }
+
+    public TYPE getType()
+    {
+        return type;
+    }
+
+    public Long getOldChecksum()
+    {
+        return oldChecksum;
+    }
+
+    public Long getNewChecksum()
+    {
+        return newChecksum;
+    }
+}