本文整理汇总了Java中org.apache.hadoop.io.Text.copyBytes方法的典型用法代码示例。如果您正苦于以下问题：Java Text.copyBytes方法的具体用法？Java Text.copyBytes怎么用？Java Text.copyBytes使用的例子？那么, 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.io.Text的用法示例。
在下文中一共展示了Text.copyBytes方法的1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: skipUtfByteOrderMark
import org.apache.hadoop.io.Text; //导入方法依赖的package包/类
private int skipUtfByteOrderMark(Text value) throws IOException {
// Strip BOM(Byte Order Mark)
// Text only support UTF-8, we only need to check UTF-8 BOM
// (0xEF,0xBB,0xBF) at the start of the text stream.
int newMaxLineLength = (int) Math.min(3L + (long) maxLineLength,
Integer.MAX_VALUE);
int newSize = in.readLine(value, newMaxLineLength, maxBytesToConsume(pos));
// Even we read 3 extra bytes for the first line,
// we won't alter existing behavior (no backwards incompat issue).
// Because the newSize is less than maxLineLength and
// the number of bytes copied to Text is always no more than newSize.
// If the return size from readLine is not less than maxLineLength,
// we will discard the current line and read the next line.
pos += newSize;
int textLength = value.getLength();
byte[] textBytes = value.getBytes();
if ((textLength >= 3) && (textBytes[0] == (byte)0xEF) &&
(textBytes[1] == (byte)0xBB) && (textBytes[2] == (byte)0xBF)) {
// find UTF-8 BOM, strip it.
LOG.info("Found UTF-8 BOM and skipped it");
textLength -= 3;
newSize -= 3;
if (textLength > 0) {
// It may work to use the same buffer and not do the copyBytes
textBytes = value.copyBytes();
value.set(textBytes, 3, textLength);
} else {
value.clear();
}
}
return newSize;
}