Transfer code from svn to gitlab.alfresco.com

src/main/java/org/alfresco/query/EmptyCannedQueryResults.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.query;
+
+import java.util.Collections;
+import java.util.List;
+
+import org.alfresco.util.Pair;
+
+/**
+ * An always empty {@link CannedQueryResults}, used when you know
+ *  you can short circuit a query when no results are found.
+ * 
+ * @author Nick Burch
+ * @since 4.0
+ */
+public class EmptyCannedQueryResults<R> extends EmptyPagingResults<R> implements CannedQueryResults<R>
+{
+   private CannedQuery<R> query;
+   
+   public EmptyCannedQueryResults(CannedQuery<R> query)
+   {
+      this.query = query;
+   }
+
+   @Override
+   public CannedQuery<R> getOriginatingQuery() {
+      return query;
+   }
+
+   @Override
+   public int getPageCount() {
+      return 0;
+   }
+
+   @Override
+   public int getPagedResultCount() {
+      return 0;
+   }
+
+   @Override
+   public List<List<R>> getPages() {
+      return Collections.emptyList();
+   }
+
+   @Override
+   public R getSingleResult() {
+      return null; 
+   }
+}