Package org.apache.commons.jexl2.parser
Class StringParser
- java.lang.Object
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- org.apache.commons.jexl2.parser.StringParser
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- Direct Known Subclasses:
JexlParser
public class StringParser extends java.lang.Object
Common constant strings utilities.This package methods read JEXL string literals and handle escaping through the 'backslash' (ie: \) character. Escaping is used to neutralize string delimiters (the single and double quotes) and read Unicode hexadecimal encoded characters.
The only escapable characters are the single and double quotes - ''' and '"' -, a Unicode sequence starting with 'u' followed by 4 hexadecimals and the backslash character - '\' - itself.
A sequence where '\' occurs before any non-escapable character or sequence has no effect, the sequence output being the same as the input.
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Constructor Summary
Constructors Constructor Description StringParser()
Default constructor.
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static java.lang.String
buildString(java.lang.CharSequence str, boolean eatsep)
Builds a string, handles escaping through '\' syntax.static java.lang.String
escapeString(java.lang.String str, char delim)
Escapes a String representation, expand non-ASCII characters as Unicode escape sequence.static int
readString(java.lang.StringBuilder strb, java.lang.CharSequence str, int index, char sep)
Read the remainder of a string till a given separator, handles escaping through '\' syntax.
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Constructor Detail
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StringParser
public StringParser()
Default constructor.
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Method Detail
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buildString
public static java.lang.String buildString(java.lang.CharSequence str, boolean eatsep)
Builds a string, handles escaping through '\' syntax.- Parameters:
str
- the string to build fromeatsep
- whether the separator, the first character, should be considered- Returns:
- the built string
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readString
public static int readString(java.lang.StringBuilder strb, java.lang.CharSequence str, int index, char sep)
Read the remainder of a string till a given separator, handles escaping through '\' syntax.- Parameters:
strb
- the destination buffer to copy characters intostr
- the originindex
- the offset into the originsep
- the separator, single or double quote, marking end of string- Returns:
- the offset in origin
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escapeString
public static java.lang.String escapeString(java.lang.String str, char delim)
Escapes a String representation, expand non-ASCII characters as Unicode escape sequence.- Parameters:
str
- the string to escape- Returns:
- the escaped representation
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