org.molgenis.util

Class TextFileUtils

java.lang.Object

org.molgenis.util.TextFileUtils

public class TextFileUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
TextFileUtils()

Method Summary

Modifier and Type	Method and Description
static boolean	fileEndsWithNewlineChar(File inFile) Find out if the source file ends with a newline character.
static int	getAmountOfNewlinesAtFileEnd(File inFile) Get the amount of newline characters at the end of a file.
static int	getNumberOfLines(File inFile) Count number of lines in the file.
static int	getNumberOfNonEmptyLines(File file, Charset charset)

Methods inherited from class java.lang.Object

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

Constructor Detail

TextFileUtils

public TextFileUtils()

Method Detail

getNumberOfLines

public static int getNumberOfLines(File inFile)
                            throws IOException

Count number of lines in the file. Add 1 extra because this only counts newlines, therefore 1 newline = 2 lines in the file. Consider using fileEndsWithNewlineChar() in combination with this function. See: http://stackoverflow .com/questions/453018/number-of-lines-in-a-file-in-java

Parameters:

inFile -

Returns:

Throws:

IOException

fileEndsWithNewlineChar

public static boolean fileEndsWithNewlineChar(File inFile)
                                       throws Exception

Find out if the source file ends with a newline character. Useful in combination with getNumberOfLines().

Parameters:

inFile -

Returns:

Throws:

Exception

getAmountOfNewlinesAtFileEnd

public static int getAmountOfNewlinesAtFileEnd(File inFile)
                                        throws Exception

Get the amount of newline characters at the end of a file. Can be of great help when you want to judge the amount of elements in a file based on the number of lines, when the file might contain (many) empty trailing newlines. The amount of \r and \n terminators are counted. The combination \r\n is reduced to \n before counting. You will probably want to use this in combination with the more lightweight check of fileEndsWithNewlineChar().

Parameters:

inFile -

Returns:

Throws:

Exception

getNumberOfNonEmptyLines

public static int getNumberOfNonEmptyLines(File file,
                                           Charset charset)
                                    throws IOException

Throws:

IOException