edu.illinois.ncsa.datawolf.executor.hpc.util

Class FileUtils

java.lang.Object

edu.illinois.ncsa.datawolf.executor.hpc.util.FileUtils

public class FileUtils
extends Object

Wrapper static methods for doing reads and writes using RandomAccessFile object.

Author:

Albert L. Rossi

Method Summary

Methods

Modifier and Type	Method and Description
static long	countLines(File file) Counts the number of lines in the file.
static long	getChecksumValue(String path) Checksum using java.util.zip.
static String	read(File file, long startOffset, long numBytes)
static byte[]	readBytes(File file, int start, int numBytes)
static List	readLines(File file, long firstLine, long numLines, boolean includeEmptyLines)
static List	readLinesFromEnd(File file, long numLines, boolean includeEmptyLines)
static List	readLinesFromStart(File file, long numLines, boolean includeEmptyLines)
static void	sync(File file)
static void	writeBinary(File file, List content, boolean append, String mode)
static void	writeBytes(File file, byte[] bytes, boolean append)
static void	writeLines(File file, List lines, boolean append)
static void	writeLines(File file, List lines, boolean append, boolean includeEmpty)
static void	writeLines(File file, String[] lines, boolean append, boolean includeEmpty)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

countLines

public static long countLines(File file)
                       throws Exception

Counts the number of lines in the file.

Parameters:

file - to read.

Returns:

number of lines in file.

Throws:

Exception

getChecksumValue

public static long getChecksumValue(String path)
                             throws IOException

Checksum using java.util.zip.

Throws:

IOException

read

public static String read(File file,
          long startOffset,
          long numBytes)
                   throws Exception

Throws:

Exception

readBytes

public static byte[] readBytes(File file,
               int start,
               int numBytes)
                        throws Exception

Throws:

Exception

readLines

public static List readLines(File file,
             long firstLine,
             long numLines,
             boolean includeEmptyLines)
                      throws Exception

Throws:

Exception

readLinesFromEnd

public static List readLinesFromEnd(File file,
                    long numLines,
                    boolean includeEmptyLines)
                             throws Exception

Throws:

Exception

readLinesFromStart

public static List readLinesFromStart(File file,
                      long numLines,
                      boolean includeEmptyLines)
                               throws Exception

Throws:

Exception

sync

public static void sync(File file)
                 throws Throwable

Throws:

Throwable

writeBinary

public static void writeBinary(File file,
               List content,
               boolean append,
               String mode)
                        throws Exception

Throws:

Exception

writeBytes

public static void writeBytes(File file,
              byte[] bytes,
              boolean append)
                       throws Exception

Throws:

Exception

writeLines

public static void writeLines(File file,
              List lines,
              boolean append)
                       throws Exception

Throws:

Exception

writeLines

public static void writeLines(File file,
              List lines,
              boolean append,
              boolean includeEmpty)
                       throws Exception

Throws:

Exception

writeLines

public static void writeLines(File file,
              String[] lines,
              boolean append,
              boolean includeEmpty)
                       throws Exception

Throws:

Exception