HADOOP-8014. ViewFileSystem does not correctly implement getDefaultBlockSize, getDefaultReplication, getContentSummary

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1310556 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/NotInMountpointException.java

@@ -0,0 +1,52 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.fs.viewfs;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashSet;
+
+import org.apache.hadoop.fs.Path;
+
+/**
+ * NotInMountpointException extends the UnsupportedOperationException.
+ * Exception class used in cases where the given path is not mounted 
+ * through viewfs.
+ */
+@InterfaceAudience.Public
+@InterfaceStability.Evolving /*Evolving for a release,to be changed to Stable */
+@SuppressWarnings("serial")
+public class NotInMountpointException extends UnsupportedOperationException {
+    final String msg;
+
+    public NotInMountpointException(Path path, String operation) {
+      msg = operation + " on path `" + path + "' is not within a mount point";
+    }
+
+    public NotInMountpointException(String operation) {
+      msg = operation + " on empty path is invalid";
+    }
+
+    @Override
+    public String getMessage() {
+      return msg;
+    }
+}