com.devexperts.qd.kit

Class RangeUtil

java.lang.Object

com.devexperts.qd.kit.RangeUtil

public class RangeUtil
extends Object

Utility class to strip symbols' prefixes for RangeStriper and RangeFilter.

See Also:

RangeFilter.SYMBOL_PATTERN

Field Summary

Fields

Modifier and Type	Field and Description
static int	CODE_LENGTH

Method Summary

Modifier and Type	Method and Description
static int	compareByString(char[] s1, String s2, int s2from) Utility method to compare two strings: one as a char array and another one as a substring.
static long	encodeSymbol(char[] s, int from, int to)
static long	encodeSymbol(String s) Encode the given symbol into the primitive long value.
static long	encodeSymbol(String s, int from, int to) Encode the given symbol into the primitive long value.
static boolean	isValidRangeChar(char c) Returns true if the given char is a valid range character for the RangeStriper and RangeFilter.
static int	skipPrefix(char[] symbol, int from, int to)
static long	skipPrefix(long symbolCode) Returns encoded string value stripped from unused prefix.
static int	skipPrefix(String symbol) Returns index in the string of the symbol stripped from unused prefix.
static int	skipPrefix(String symbol, int length) Returns index in the string of the symbol stripped from unused prefix.

Methods inherited from class java.lang.Object

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

Field Detail

CODE_LENGTH

public static final int CODE_LENGTH

See Also:

Constant Field Values

Method Detail

encodeSymbol

public static long encodeSymbol(String s)

Encode the given symbol into the primitive long value. Only first CODE_LENGTH characters will be encoded.

Parameters:

s - symbol

Returns:

encoded long value

See Also:

encodeSymbol(String, int, int)

encodeSymbol

public static long encodeSymbol(String s,
                                int from,
                                int to)

Encode the given symbol into the primitive long value. Only first CODE_LENGTH characters within the given bounds will be encoded.

Parameters:

s - symbol

from - the beginning index, inclusive

to - the ending index, exclusive

Returns:

encoded long value

See Also:

SymbolCodec.decodeToLong(int)

encodeSymbol

public static long encodeSymbol(char[] s,
                                int from,
                                int to)

compareByString

public static int compareByString(char[] s1,
                                  String s2,
                                  int s2from)

Utility method to compare two strings: one as a char array and another one as a substring.

Parameters:

s1 - string represented as a char array

s2 - string to get a substring from

s2from - index to get a substring from

Returns:

the sign of the comparison

See Also:

String.compareTo(String)

isValidRangeChar

public static boolean isValidRangeChar(char c)

Returns true if the given char is a valid range character for the RangeStriper and RangeFilter.

Parameters:

c - character

Returns:

true if the given char is a valid range char

skipPrefix

public static long skipPrefix(long symbolCode)

Returns encoded string value stripped from unused prefix.

Parameters:

symbolCode - symbol encoded as a long value

Returns:

stripped string encoded as a long value

See Also:

RangeFilter.SYMBOL_PATTERN

skipPrefix

public static int skipPrefix(String symbol)

Returns index in the string of the symbol stripped from unused prefix.

Parameters:

symbol - symbol string

Returns:

stripped string encoded as a long value

See Also:

RangeFilter.SYMBOL_PATTERN

skipPrefix

public static int skipPrefix(String symbol,
                             int length)

Returns index in the string of the symbol stripped from unused prefix.

Parameters:

symbol - symbol string

length - symbol length

Returns:

stripped string encoded as a long value

See Also:

RangeFilter.SYMBOL_PATTERN

skipPrefix

public static int skipPrefix(char[] symbol,
                             int from,
                             int to)