本文整理匯總了Java中org.apache.hadoop.io.compress.Compressor.compress方法的典型用法代碼示例。如果您正苦於以下問題：Java Compressor.compress方法的具體用法？Java Compressor.compress怎麽用？Java Compressor.compress使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類org.apache.hadoop.io.compress.Compressor的用法示例。
在下文中一共展示了Compressor.compress方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: checkCompressedSize
import org.apache.hadoop.io.compress.Compressor; //導入方法依賴的package包/類
/**
* Find the size of compressed data assuming that buffer will be compressed
* using given algorithm.
* @param compressor Algorithm used for compression.
* @param buffer Array to be compressed.
* @param offset Offset to beginning of the data.
* @param length Length to be compressed.
* @return Size of compressed data in bytes.
*/
public static int checkCompressedSize(Compressor compressor, byte[] buffer,
int offset, int length) {
byte[] compressedBuffer = new byte[buffer.length];
// in fact the buffer could be of any positive size
compressor.setInput(buffer, offset, length);
compressor.finish();
int currentPos = 0;
while (!compressor.finished()) {
try {
// we don't care about compressed data,
// we just want to callculate number of bytes
currentPos += compressor.compress(compressedBuffer, 0,
compressedBuffer.length);
} catch (IOException e) {
throw new RuntimeException(
"For some reason compressor couldn't read data. " +
"It is likely a problem with " +
compressor.getClass().getName(), e);
}
}
return currentPos;
}