This checkin does two things:

1. Refines the semantics of ghost creation, so that they only appear when
warranted.
2. Implements a mechanism for filtering out files which should not appear in comparison
results or be pushed along by updates.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@4525 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

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

@@ -0,0 +1,57 @@
+/**
+ * 
+ */
+package org.alfresco.repo.avm.util;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.alfresco.util.NameMatcher;
+
+/**
+ * NameMatcher that matches a list of extensions (case insensitively).
+ * @author britt
+ */
+public class FileExtensionNameMatcher implements NameMatcher 
+{
+    /**
+     * The extensions to match.
+     */
+    private List<String> fExtensions;
+    
+    /**
+     * Default constructor.
+     */
+    public FileExtensionNameMatcher()
+    {
+        fExtensions = new ArrayList<String>();
+    }
+    
+    /**
+     * Set the extensions case insensitively.
+     * @param extensions
+     */
+    public void setExtensions(List<String> extensions)
+    {
+        for (String extension : extensions)
+        { 
+            fExtensions.add(extension.toLowerCase());
+        }
+    }
+    
+    /* (non-Javadoc)
+     * @see org.alfresco.util.NameMatcher#matches(java.lang.String)
+     */
+    public boolean matches(String name) 
+    {
+        String lcName = name.toLowerCase();
+        for (String ext : fExtensions)
+        {
+            if (lcName.endsWith(ext))
+            {
+                return true;
+            }
+        }
+        return false;
+    }
+}