org.apache.drill.common.util

Class DrillStringUtils

java.lang.Object

org.apache.drill.common.util.DrillStringUtils

public class DrillStringUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
DrillStringUtils()

Method Summary

Modifier and Type	Method and Description
static String	escapeJava(String input) Escapes the characters in a String according to Java string literal rules.
static String	escapeNewLines(String input)
static String	escapeSql(String str) Copied form commons-lang 2.x code as common-lang 3.x has this API removed.
static int	parseBinaryString(io.netty.buffer.ByteBuf str, int strStart, int strEnd, io.netty.buffer.ByteBuf out) parsing a hex encoded binary string and write to an output buffer.
static String	readable(long bytes) Converts the long number into more human readable string.
static String	removeLeadingSlash(String path) Removes all leading slash characters from specified string.
static String	sanitizeCSV(String csv) Removes extra spaces and empty values in a CSV String
static String	toBinaryString(byte[] buf) Return a printable representation of a byte array, escaping the non-printable bytes as '\\xNN' where NN is the hexadecimal representation of such bytes.
static String	toBinaryString(byte[] buf, int strStart, int strEnd) Return a printable representation of a byte array, escaping the non-printable bytes as '\\xNN' where NN is the hexadecimal representation of such bytes.
static String	toBinaryString(io.netty.buffer.ByteBuf buf, int strStart, int strEnd) Return a printable representation of a byte buffer, escaping the non-printable bytes as '\\xNN' where NN is the hexadecimal representation of such bytes.
static String	unescapeJava(String input) Unescapes any Java literals found in the String.

Methods inherited from class java.lang.Object

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

Constructor Detail

DrillStringUtils

public DrillStringUtils()

Method Detail

readable

public static String readable(long bytes)

Converts the long number into more human readable string.

unescapeJava

public static String unescapeJava(String input)

Unescapes any Java literals found in the String. For example, it will turn a sequence of '\' and 'n' into a newline character, unless the '\' is preceded by another '\'.

Parameters:

input - the String to unescape, may be null

Returns:

a new unescaped String, null if null string input

escapeJava

public static String escapeJava(String input)

Escapes the characters in a String according to Java string literal rules. Deals correctly with quotes and control-chars (tab, backslash, cr, ff, etc.) so, for example, a tab becomes the characters '\\' and 't'. Example:

 input string: He didn't say, "Stop!"
 output string: He didn't say, \"Stop!\"
 

Parameters:

input - String to escape values in, may be null

Returns:

String with escaped values, null if null string input

escapeNewLines

public static String escapeNewLines(String input)

escapeSql

public static String escapeSql(String str)

Copied form commons-lang 2.x code as common-lang 3.x has this API removed. (http://commons.apache.org/proper/commons-lang/article3_0.html#StringEscapeUtils.escapeSql)

Parameters:

str -

Returns:

toBinaryString

public static String toBinaryString(io.netty.buffer.ByteBuf buf,
                                    int strStart,
                                    int strEnd)

Return a printable representation of a byte buffer, escaping the non-printable bytes as '\\xNN' where NN is the hexadecimal representation of such bytes. This function does not modify the readerIndex and writerIndex of the byte buffer.

toBinaryString

public static String toBinaryString(byte[] buf)

Return a printable representation of a byte array, escaping the non-printable bytes as '\\xNN' where NN is the hexadecimal representation of such bytes.

toBinaryString

public static String toBinaryString(byte[] buf,
                                    int strStart,
                                    int strEnd)

Return a printable representation of a byte array, escaping the non-printable bytes as '\\xNN' where NN is the hexadecimal representation of such bytes.

parseBinaryString

public static int parseBinaryString(io.netty.buffer.ByteBuf str,
                                    int strStart,
                                    int strEnd,
                                    io.netty.buffer.ByteBuf out)

parsing a hex encoded binary string and write to an output buffer. This function does not modify the readerIndex and writerIndex of the byte buffer.

Returns:

Index in the byte buffer just after the last written byte.

sanitizeCSV

public static String sanitizeCSV(String csv)

Removes extra spaces and empty values in a CSV String

Parameters:

csv - The CSV string to be sanitized

Returns:

The sanitized CSV string

removeLeadingSlash

public static String removeLeadingSlash(String path)

Removes all leading slash characters from specified string.

Parameters:

path - string to remove all leading slash characters

Returns:

string with removed leading slash characters