branch-0.23.1/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestJsonUtil.java

/**
 * 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.web;

import java.util.Map;

import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.protocol.HdfsFileStatus;
import org.junit.Assert;
import org.junit.Test;
import org.mortbay.util.ajax.JSON;

public class TestJsonUtil {
  static FileStatus toFileStatus(HdfsFileStatus f, String parent) {
    return new FileStatus(f.getLen(), f.isDir(), f.getReplication(),
        f.getBlockSize(), f.getModificationTime(), f.getAccessTime(),
        f.getPermission(), f.getOwner(), f.getGroup(),
        f.isSymlink() ? new Path(f.getSymlink()) : null,
        new Path(f.getFullName(parent)));
  }

  @Test
  public void testHdfsFileStatus() {
    final long now = System.currentTimeMillis();
    final String parent = "/dir";
    final HdfsFileStatus status = new HdfsFileStatus(1001L, false, 3, 1L<<26,
        now, now + 10, new FsPermission((short)0644), "user", "group",
        DFSUtil.string2Bytes("bar"), DFSUtil.string2Bytes("foo"));
    final FileStatus fstatus = toFileStatus(status, parent);
    System.out.println("status  = " + status);
    System.out.println("fstatus = " + fstatus);
    final String json = JsonUtil.toJsonString(status, true);
    System.out.println("json    = " + json.replace(",", ",\n  "));
    final HdfsFileStatus s2 = JsonUtil.toFileStatus((Map<?, ?>)JSON.parse(json), true);
    final FileStatus fs2 = toFileStatus(s2, parent);
    System.out.println("s2      = " + s2);
    System.out.println("fs2     = " + fs2);
    Assert.assertEquals(fstatus, fs2);
  }
}