HDFS-8408. Revisit and refactor ErasureCodingInfo (Contributed by Vinayakumar B)

Added missed file

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/ErasureCodingZone.java

@@ -0,0 +1,66 @@
+/**
+ * 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.hdfs.protocol;
+
+import org.apache.hadoop.io.erasurecode.ECSchema;
+
+/**
+ * Information about the EC Zone at the specified path.
+ */
+public class ErasureCodingZone {
+
+  private String dir;
+  private ECSchema schema;
+  private int cellSize;
+
+  public ErasureCodingZone(String dir, ECSchema schema, int cellSize) {
+    this.dir = dir;
+    this.schema = schema;
+    this.cellSize = cellSize;
+  }
+
+  /**
+   * Get directory of the EC zone.
+   * 
+   * @return
+   */
+  public String getDir() {
+    return dir;
+  }
+
+  /**
+   * Get the schema for the EC Zone
+   * 
+   * @return
+   */
+  public ECSchema getSchema() {
+    return schema;
+  }
+
+  /**
+   * Get cellSize for the EC Zone
+   */
+  public int getCellSize() {
+    return cellSize;
+  }
+
+  @Override
+  public String toString() {
+    return "Dir: " + getDir() + ", Schema: " + schema + ", cellSize: "
+        + cellSize;
+  }
+}