Module openj9.dtfj

Package com.ibm.j9ddr.util

Class PatternString

java.lang.Object

com.ibm.j9ddr.util.PatternString

All Implemented Interfaces:

Serializable

public class PatternString
extends Object
implements Serializable

A string containing wildcards and other characters that enable it to represent many strings at once.

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PatternString.PatternStringPair	A class to represent the PatternString in two separate patterns

Field Summary

Fields

Modifier and Type	Field	Description
static final PatternString	ALWAYS_MATCHES
static final char	singleCharWildCard
static final char	wildCard

Constructor Summary

Constructors

Constructor	Description
PatternString(String pattern)	Constructor for creating a PatternString class which can contain wildcard expressions and other characters to represent many strings at once.

Method Summary

Modifier and Type	Method	Description
boolean	endsWith(String string)	Determine if there is a match to the pattern that ends with the given string
int[]	indexOf(int c)	Finds the indices of the possible first locations of the indicated character.
boolean	isMatch(String string)	Determines if the pattern matches with a given string.
boolean	isRegularString()	Checks if this PatternString contains no wildcards.
static boolean	isWildcard(char c)	Checks if the provided character is a wildcard
int[]	lastIndexOf(int c)	Finds the indices of the possible last locations of the indicated character.
PatternString.PatternStringPair	split(int index)	Splits the patterns into two separate patterns, the splitting being done by the character at the indicated index, so this character is not included in either string.
boolean	startsWith(String string)	Determine if there is a match to the pattern that starts with the given string
String	toString()	Gives the pattern used to create this PatternString class

Methods declared in class java.lang.Object

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

Field Details

wildCard

public static final char wildCard

See Also:

• Constant Field Values

singleCharWildCard

public static final char singleCharWildCard

See Also:

• Constant Field Values

ALWAYS_MATCHES

public static final PatternString ALWAYS_MATCHES

Constructor Details

PatternString

public PatternString(String pattern)

Constructor for creating a PatternString class which can contain wildcard expressions and other characters to represent many strings at once.

Parameters:

pattern - a String which can contain wildcards

Method Details

split

public PatternString.PatternStringPair split(int index)

Splits the patterns into two separate patterns, the splitting being done by the character at the indicated index, so this character is not included in either string. If such a character is a variable length wildcard then the new patterns will begin and end with wildcards as needed.

Parameters:

index - the index at which to split the PatternString in two parts

indexOf

public int[] indexOf(int c)

Finds the indices of the possible first locations of the indicated character. The results are returned in ascending order.

Parameters:

c - index of the pattern within this PatternString

Returns:

int[] an array indicating the possible first locations of the character indicated at the index provided.

lastIndexOf

public int[] lastIndexOf(int c)

Finds the indices of the possible last locations of the indicated character. The results are returned in descending order.

Parameters:

c - index of the pattern within this PatternString

Returns:

int[] an array indicating the possible last locations of the character indicated at the index provided.

isRegularString

public boolean isRegularString()

Checks if this PatternString contains no wildcards.

Returns:

boolean true if this PatternString contains no wildcards, false otherwise

isWildcard

public static boolean isWildcard(char c)

Checks if the provided character is a wildcard

Parameters:

c - the character to check whether it is a wildcard or not

Returns:

boolean true if the character given is a wildcard

endsWith

public boolean endsWith(String string)

Determine if there is a match to the pattern that ends with the given string

Parameters:

string - the String to match

Returns:

boolean returns true if there is a match, false if not

isMatch

public boolean isMatch(String string)

Determines if the pattern matches with a given string.

Parameters:

string - the String to match

Returns:

boolean returns true if there is a match, false if not

startsWith

public boolean startsWith(String string)

Determine if there is a match to the pattern that starts with the given string

Parameters:

string - the String to match

Returns:

boolean returns true if there is a match, false if not

toString

public String toString()

Gives the pattern used to create this PatternString class

Overrides:

toString in class Object

Returns:

String returns the pattern used to construct this PatternString