One simple revert action, and a tool for encoding pick lists for more complicated actions

in the future.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@4348 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/avm/util/VersionPathStuffer.java

@@ -0,0 +1,69 @@
+/**
+ * 
+ */
+package org.alfresco.repo.avm.util;
+
+import org.alfresco.repo.avm.AVMNodeConverter;
+import org.alfresco.service.cmr.repository.NodeRef;
+import org.alfresco.util.Pair;
+
+/**
+ * A utility to build a (possibly long) String representation of
+ * a collection of AVM path,versions. The path,versions can be recovered
+ * by VersionPathUnStuffer.
+ * @author britt
+ */
+public class VersionPathStuffer 
+{
+    /**
+     * The internal buffer.
+     */
+    private StringBuilder fBuilder;
+    
+    /**
+     * Whether any paths have been added yet.
+     */
+    private boolean fAnyAdded;
+    
+    /**
+     * Make up one.
+     */
+    public VersionPathStuffer()
+    {
+        fBuilder = new StringBuilder();
+        fAnyAdded = false;
+    }
+    
+    /**
+     * Add a version path expressed by the version and path.
+     */
+    public void add(int version, String path)
+    {
+        if (fAnyAdded)
+        {
+            fBuilder.append(';');
+        }
+        fBuilder.append(path);
+        fBuilder.append('@');
+        fBuilder.append(version);
+        fAnyAdded = true;
+    }
+    
+    /**
+     * Add a version path expressed as a NodeRef.
+     */
+    public void add(NodeRef nodeRef)
+    {
+        Pair<Integer, String> versionPath =
+            AVMNodeConverter.ToAVMVersionPath(nodeRef);
+        add(versionPath.getFirst(), versionPath.getSecond());
+    }
+    
+    /**
+     * Get the stuffed String version of the Version/Paths contained in this.
+     */
+    public String toString()
+    {
+        return fBuilder.toString();
+    }
+}