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From milleruntime <...@git.apache.org>
Subject [GitHub] accumulo pull request #279: ACCUMULO-3238 Table.ID Namespace.ID Refactor
Date Wed, 12 Jul 2017 20:48:51 GMT
Github user milleruntime commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/279#discussion_r127067656
  
    --- Diff: core/src/main/java/org/apache/accumulo/core/client/impl/Table.java ---
    @@ -0,0 +1,48 @@
    +/*
    + * 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.accumulo.core.client.impl;
    +
    +import org.apache.accumulo.core.client.Instance;
    +import org.apache.hadoop.io.Text;
    +
    +public class Table {
    +
    +  /**
    +   * Object representing an internal table ID. This class was created to help with type
safety. For help obtaining the value of a table ID from Zookeeper, see
    +   * {@link Tables#getTableId(Instance, String)}
    +   */
    +  public static class ID extends AbstractId {
    +    private static final long serialVersionUID = 7399913185860577809L;
    +
    +    public static final ID METADATA = new ID("!0");
    +    public static final ID REPLICATION = new ID("+rep");
    +    public static final ID ROOT = new ID("+r");
    +
    +    public static ID empty() {
    +      return new ID("");
    --- End diff --
    
    I was able to work around the need for empty() everywhere except KeyExtent, where I just
created a local EMPTY_ID to prevent any NPEs. ef30550



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