File	Doc	Category	Size	Date	Package
StringParser.java	API Doc	Apache Tomcat 6.0.14	8665	Fri Jul 20 04:20:36 BST 2007	org.apache.catalina.util

StringParser

• java.lang.Object

Fields Summary
private char[]	chars The characters of the current string, as a character array. Stored when the string is first specified to speed up access to characters being compared during parsing.
private int	index The zero-relative index of the current point at which we are positioned within the string being parsed. NOTE: the value of this index can be one larger than the index of the last character of the string (i.e. equal to the string length) if you parse off the end of the string. This value is useful for extracting substrings that include the end of the string.
private int	length The length of the String we are currently parsing. Stored when the string is first specified to avoid repeated recalculations.
private String	string The String we are currently parsing.

Constructors Summary
public StringParser() Construct a string parser with no preset string to be parsed. this(null);
public StringParser(String string) Construct a string parser that is initialized to parse the specified string. param string The string to be parsed super(); setString(string);

Methods Summary
public void	advance() Advance the current parsing position by one, if we are not already past the end of the string. if (index < length) index++;
public java.lang.String	extract(int start) Extract and return a substring that starts at the specified position, and extends to the end of the string being parsed. If this is not possible, a zero-length string is returned. param start Starting index, zero relative, inclusive if ((start < 0) || (start >= length)) return (""); else return (string.substring(start));
public java.lang.String	extract(int start, int end) Extract and return a substring that starts at the specified position, and ends at the character before the specified position. If this is not possible, a zero-length string is returned. param start Starting index, zero relative, inclusive param end Ending index, zero relative, exclusive if ((start < 0) || (start >= end) || (end > length)) return (""); else return (string.substring(start, end));
public int	findChar(char ch) Return the index of the next occurrence of the specified character, or the index of the character after the last position of the string if no more occurrences of this character are found. The current parsing position is updated to the returned value. param ch Character to be found while ((index < length) && (ch != chars[index])) index++; return (index);
public int	findText() Return the index of the next occurrence of a non-whitespace character, or the index of the character after the last position of the string if no more non-whitespace characters are found. The current parsing position is updated to the returned value. while ((index < length) && isWhite(chars[index])) index++; return (index);
public int	findWhite() Return the index of the next occurrence of a whitespace character, or the index of the character after the last position of the string if no more whitespace characters are found. The current parsing position is updated to the returned value. while ((index < length) && !isWhite(chars[index])) index++; return (index);
public int	getIndex() Return the zero-relative index of our current parsing position within the string being parsed. // ------------------------------------------------------------- Properties return (this.index);
public int	getLength() Return the length of the string we are parsing. return (this.length);
public java.lang.String	getString() Return the String we are currently parsing. return (this.string);
protected boolean	isWhite(char ch) Is the specified character considered to be whitespace? param ch Character to be checked if ((ch == ' ") || (ch == '\t") || (ch == '\r") || (ch == '\n")) return (true); else return (false);
public void	reset() Reset the current state of the parser to the beginning of the current string being parsed. index = 0;
public void	setString(java.lang.String string) Set the String we are currently parsing. The parser state is also reset to begin at the start of this string. param string The string to be parsed. this.string = string; if (string != null) { this.length = string.length(); chars = this.string.toCharArray(); } else { this.length = 0; chars = new char[0]; } reset();
public int	skipChar(char ch) Advance the current parsing position while it is pointing at the specified character, or until it moves past the end of the string. Return the final value. param ch Character to be skipped while ((index < length) && (ch == chars[index])) index++; return (index);
public int	skipText() Advance the current parsing position while it is pointing at a non-whitespace character, or until it moves past the end of the string. Return the final value. while ((index < length) && !isWhite(chars[index])) index++; return (index);
public int	skipWhite() Advance the current parsing position while it is pointing at a whitespace character, or until it moves past the end of the string. Return the final value. while ((index < length) && isWhite(chars[index])) index++; return (index);