本文整理汇总了Java中org.apache.hadoop.fs.FSDataInputStream.readByte方法的典型用法代码示例。如果您正苦于以下问题：Java FSDataInputStream.readByte方法的具体用法？Java FSDataInputStream.readByte怎么用？Java FSDataInputStream.readByte使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.hadoop.fs.FSDataInputStream的用法示例。
在下文中一共展示了FSDataInputStream.readByte方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: getFileContentsUsingDfs
import org.apache.hadoop.fs.FSDataInputStream; //导入方法依赖的package包/类
private byte[] getFileContentsUsingDfs(String fileName, int len)
throws Exception {
final FSDataInputStream in = hdfs.open(new Path(fileName));
final byte[] ret = new byte[len];
in.readFully(ret);
try {
in.readByte();
Assert.fail("expected end of file");
} catch (EOFException e) {
// expected. Unfortunately there is no associated message to check
}
in.close();
return ret;
}
示例2: getInputStream
import org.apache.hadoop.fs.FSDataInputStream; //导入方法依赖的package包/类
@Override
protected InputStream getInputStream(PathData item) throws IOException {
FSDataInputStream i = (FSDataInputStream)super.getInputStream(item);
// Handle 0 and 1-byte files
short leadBytes;
try {
leadBytes = i.readShort();
} catch (EOFException e) {
i.seek(0);
return i;
}
// Check type of stream first
switch(leadBytes) {
case 0x1f8b: { // RFC 1952
// Must be gzip
i.seek(0);
return new GZIPInputStream(i);
}
case 0x5345: { // 'S' 'E'
// Might be a SequenceFile
if (i.readByte() == 'Q') {
i.close();
return new TextRecordInputStream(item.stat);
}
}
default: {
// Check the type of compression instead, depending on Codec class's
// own detection methods, based on the provided path.
CompressionCodecFactory cf = new CompressionCodecFactory(getConf());
CompressionCodec codec = cf.getCodec(item.path);
if (codec != null) {
i.seek(0);
return codec.createInputStream(i);
}
break;
}
case 0x4f62: { // 'O' 'b'
if (i.readByte() == 'j') {
i.close();
return new AvroFileInputStream(item.stat);
}
break;
}
}
// File is non-compressed, or not a file container we know.
i.seek(0);
return i;
}