Package org.apache.hadoop.io

Examples of org.apache.hadoop.io.ArrayWritable.readFields()

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            if (logVersion >= 0)
              name.readFields(in);  // read name only
            else {  // other versions do
              // get name and replication
              aw = new ArrayWritable(UTF8.class);
              aw.readFields(in);
              writables = aw.get();
              if (writables.length != 2)
                throw new IOException("Incorrect data fortmat. "
                                      + "Name & replication pair expected");
              name = (UTF8) writables[0];
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                                             ((UTF8)writables[1]).toString());
              replication = adjustReplication(replication);
            }
            // get blocks
            aw = new ArrayWritable(Block.class);
            aw.readFields(in);
            writables = aw.get();
            Block blocks[] = new Block[writables.length];
            System.arraycopy(writables, 0, blocks, 0, blocks.length);
            // add to the file tree
            fsDir.unprotectedAddFile(name, blocks, replication);
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            if (logVersion >= 0)
              name.readFields(in);  // read name only
            else {  // other versions do
              // get name and replication
              aw = new ArrayWritable(UTF8.class);
              aw.readFields(in);
              writables = aw.get();
              if (-4 <= logVersion && writables.length != 2 ||
                  -7 <= logVersion && logVersion < -4 && writables.length != 3||
                  logVersion < -7 && writables.length != 4) {
                  throw new IOException("Incorrect data format."  +
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                blockSize = Long.parseLong(((UTF8)writables[3]).toString());
              }
            }
            // get blocks
            aw = new ArrayWritable(Block.class);
            aw.readFields(in);
            writables = aw.get();
            Block blocks[] = new Block[writables.length];
            System.arraycopy(writables, 0, blocks, 0, blocks.length);

            // Older versions of HDFS does not store the block size in inode.
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              dst.readFields(in);
            } else {
              ArrayWritable aw = null;
              Writable writables[];
              aw = new ArrayWritable(UTF8.class);
              aw.readFields(in);
              writables = aw.get();
              if (writables.length != 3) {
                throw new IOException("Incorrect data format. "
                                      + "Mkdir operation.");
              }
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              src.readFields(in);
            } else {
              ArrayWritable aw = null;
              Writable writables[];
              aw = new ArrayWritable(UTF8.class);
              aw.readFields(in);
              writables = aw.get();
              if (writables.length != 2) {
                throw new IOException("Incorrect data format. "
                                      + "delete operation.");
              }
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              src.readFields(in);
            } else {
              ArrayWritable aw = null;
              Writable writables[];
              aw = new ArrayWritable(UTF8.class);
              aw.readFields(in);
              writables = aw.get();
              if (writables.length != 2) {
                throw new IOException("Incorrect data format. "
                                      + "Mkdir operation.");
              }
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            if (logVersion >= 0)
              name.readFields(in);  // read name only
            else {  // other versions do
              // get name and replication
              aw = new ArrayWritable(UTF8.class);
              aw.readFields(in);
              writables = aw.get();
              if (-4 <= logVersion && writables.length != 2 ||
                  -7 <= logVersion && logVersion < -4 && writables.length != 3||
                  logVersion < -7 && writables.length != 4) {
                  throw new IOException("Incorrect data format."  +
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                blockSize = Long.parseLong(((UTF8)writables[3]).toString());
              }
            }
            // get blocks
            aw = new ArrayWritable(Block.class);
            aw.readFields(in);
            writables = aw.get();
            Block blocks[] = new Block[writables.length];
            System.arraycopy(writables, 0, blocks, 0, blocks.length);

            // Older versions of HDFS does not store the block size in inode.
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              dst.readFields(in);
            } else {
              ArrayWritable aw = null;
              Writable writables[];
              aw = new ArrayWritable(UTF8.class);
              aw.readFields(in);
              writables = aw.get();
              if (writables.length != 3) {
                throw new IOException("Incorrect data format. "
                                      + "Mkdir operation.");
              }
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