org.postgresql.util
Class PGtokenizer

java.lang.Object
  org.postgresql.util.PGtokenizer

public class PGtokenizer
extends Object

This class is used to tokenize the text output of org.postgres. It's mainly used by the geometric classes, but is useful in parsing any output from custom data types output from org.postgresql.

See Also:

PGbox, PGcircle, PGlseg, PGpath, PGpoint, PGpolygon

Field Summary

protected List<String>

tokens

Constructor Summary

PGtokenizer(String string, char delim)
Create a tokeniser.

Method Summary

int	getSize()
String	getToken(int n)
void	remove(String l, String t) This removes the lead/trailing strings from all tokens
static String	remove(String s, String l, String t) This removes the lead/trailing strings from a string
void	removeAngle() Removes < and > from the beginning and end of all tokens
static String	removeAngle(String s) Removes < and > from the beginning and end of a string
void	removeBox() Removes [ and ] from the beginning and end of all tokens
static String	removeBox(String s) Removes [ and ] from the beginning and end of a string
void	removeCurlyBrace() Removes < and > from the beginning and end of all tokens
static String	removeCurlyBrace(String s) Removes curly braces { and } from the beginning and end of a string
void	removePara() Removes ( and ) from the beginning and end of all tokens
static String	removePara(String s) Removes ( and ) from the beginning and end of a string
int	tokenize(String string, char delim) This resets this tokenizer with a new string and/or delimiter.
PGtokenizer	tokenizeToken(int n, char delim) This returns a new tokenizer based on one of our tokens.

Methods inherited from class java.lang.Object

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

Field Detail

tokens

protected List<String> tokens

Constructor Detail

PGtokenizer

public PGtokenizer(String string,
                   char delim)

Create a tokeniser.

We could have used StringTokenizer to do this, however, we needed to handle nesting of '(' ')' '[' ']' '<' and '>' as these are used by the geometric data types.

Parameters:

string - containing tokens

delim - single character to split the tokens

Method Detail

tokenize

public int tokenize(String string,
                    char delim)

This resets this tokenizer with a new string and/or delimiter.

Parameters:

string - containing tokens

delim - single character to split the tokens

Returns:

number of tokens

getSize

public int getSize()

Returns:

the number of tokens available

getToken

public String getToken(int n)

Parameters:

n - Token number ( 0 ... getSize()-1 )

Returns:

The token value

tokenizeToken

public PGtokenizer tokenizeToken(int n,
                                 char delim)

This returns a new tokenizer based on one of our tokens. The geometric datatypes use this to process nested tokens (usually PGpoint).

Parameters:

n - Token number ( 0 ... getSize()-1 )

delim - The delimiter to use

Returns:

A new instance of PGtokenizer based on the token

remove

public static String remove(String s,
                            String l,
                            String t)

This removes the lead/trailing strings from a string

Parameters:

s - Source string

l - Leading string to remove

t - Trailing string to remove

Returns:

String without the lead/trailing strings

remove

public void remove(String l,
                   String t)

This removes the lead/trailing strings from all tokens

Parameters:

l - Leading string to remove

t - Trailing string to remove

removePara

public static String removePara(String s)

Removes ( and ) from the beginning and end of a string

Parameters:

s - String to remove from

Returns:

String without the ( or )

removePara

public void removePara()

Removes ( and ) from the beginning and end of all tokens

removeBox

public static String removeBox(String s)

Removes [ and ] from the beginning and end of a string

Parameters:

s - String to remove from

Returns:

String without the [ or ]

removeBox

public void removeBox()

Removes [ and ] from the beginning and end of all tokens

removeAngle

public static String removeAngle(String s)

Removes < and > from the beginning and end of a string

Parameters:

s - String to remove from

Returns:

String without the < or >

removeAngle

public void removeAngle()

Removes < and > from the beginning and end of all tokens

removeCurlyBrace

public static String removeCurlyBrace(String s)

Removes curly braces { and } from the beginning and end of a string

Parameters:

s - String to remove from

Returns:

String without the { or }

removeCurlyBrace

public void removeCurlyBrace()

Removes < and > from the beginning and end of all tokens