/** Test constructing LocatedBlock with null cachedLocs */
@Test
public void testLocatedBlockConstructorWithNullCachedLocs() {
DatanodeInfo d = DFSTestUtil.getLocalDatanodeInfo();
DatanodeInfo[] ds = new DatanodeInfo[1];
ds[0] = d;
ExtendedBlock b1 = new ExtendedBlock("bpid", 1, 1, 1);
LocatedBlock l1 = new LocatedBlock(b1, ds, null, null, 0, false, null);
final DatanodeInfo[] cachedLocs = l1.getCachedLocations();
assertTrue(cachedLocs.length == 0);
}
/** Convert a LocatedBlock to a Json map. */
private static Map<String, Object> toJsonMap(final LocatedBlock locatedblock) throws IOException {
if (locatedblock == null) {
return null;
}
final Map<String, Object> m = new TreeMap<String, Object>();
m.put("blockToken", toJsonMap(locatedblock.getBlockToken()));
m.put("isCorrupt", locatedblock.isCorrupt());
m.put("startOffset", locatedblock.getStartOffset());
m.put("block", toJsonMap(locatedblock.getBlock()));
m.put("locations", toJsonArray(locatedblock.getLocations()));
m.put("cachedLocations", toJsonArray(locatedblock.getCachedLocations()));
return m;
}