    All Packages  Class Hierarchy  This Package  Previous  Next  Index

# Class jclass.util.JCUtilConverter

    java.lang.Object
       |
       +----jclass.util.JCUtilConverter

public class JCUtilConverter
extends Object

JCUtilConverter contains static methods for retrieving parameters from a source file or applet, and for converting parameters to particular data types.

##

conv
param_source
  Hash table of alternate parameter sources.

##

JCUtilConverter()

##

checkEnum(int, String, int[])
  Checks the validity of an enum.
error(String)
  Writes a parse error message to stdout.
error(String, String)
  Writes a parse error message to stdout.
fromEnum(int, String, String, String[][], int[][], String)
  Converts an enum to a string.
fromEnum(int, String[], int[])
  Converts an enum to a string.
fromNewLine(String)
  Converts all occurrences of char '\n' to string "\n"
getParam(Applet, Component, String)
  Gets a parameter value from the applet or source.
getParam(Applet, Component, String, String)
  Gets a parameter of the applet in the following precedence:

       <component_name>.<param>
       <param>

setParamSource(Component, String)
  Sets the source from which getParam should read parameter values.
toBoolean(Applet, Component, String, String, boolean)
  Retrieves a parameter and converts its value to a boolean value.
toBoolean(String, boolean)
  Converts a string to a boolean.
toColor(String)
  Converts a string to a Color.
toColor(String, Color)
  Converts a string to a Color.
toColorList(String)
  Converts a string to an array of Colors.
toColorList(String, Color[])
  Converts a string to an array of Colors.
toDate(String, Date)
  Converts a String to a Date
toDimension(String, Dimension)
  Converts a string to a Dimension instance.
toDouble(String, double)
  Converts a string to an double.
toEnum(String, String, String, String[][], int[][], int)
  Converts a string to an enum.
toEnum(String, String, String[], int[], int)
  Converts a string to an enum.
toEnum(String, String, String[], long[], long)
  Converts a string to an enum.
toEnum(String, String[], int[], int)
  Converts a string to an enum.
toEnumList(String, String, String[], int[], int[])
  Converts a string to a list of enums.
toFont(String)
  Converts a font name to a font instance.
toFont(String, Font)
  Converts a font name to a font instance.
toImage(Component, String)
  Returns an image which gets pixel data from the specified file.
toImage(Component, String, Image)
  Returns an image which gets pixel data from the specified file.
toImageList(Component, String, Image[])
  Returns an array of images which get pixel data from the specified file.
toInsets(String, Insets)
  Converts a string to an Insets instance.
toInt(String, int)
  Converts a string to an integer.
toIntList(String, char)
  Converts a string to an array of integers based on the provided delimiter.
toIntList(String, char, int[])
  Converts a string to an array of integers based on the provided delimiter.
toNewLine(String)
  Converts all occurrences of "\n" to newlines.
toPoint(String, Point)
  Converts a string to a Point instance.
toString(Object)
  Converts an object to a string.
toStringList(String)
  Converts a string to an array of Strings.
toVector(Component, String, char, boolean)
  Converts a delimited list of tokens to a JCVector.
toVector(Component, String, char, boolean, JCVector)
  Converts a delimited list of tokens to a JCVector.
toVectorFromCSV(Component, String)
  Converts a string using comma-separated value format.
toVectorFromCSV(Component, String, JCVector)
  Converts a string using comma-separated value format.
trim(Object)
  Returns a trimmed string, with trailing nulls removed
waitForImage(Component, Image)
  Waits for an image to be loaded, using the MediaTracker class.

##

conv

      public static JCConverter conv

param_source

      public static Hashtable param_source

  Hash table of alternate parameter sources.

##

JCUtilConverter

      public JCUtilConverter()

##

setParamSource

      public static void setParamSource(Component key,
                                        String source)

  Sets the source from which getParam should read parameter values.

  Parameters:
    source - a Vector of Strings; if null, getParam will read values from its specified applet
  See Also:
    getParam

getParam

      public static String getParam(Applet app,
                                    Component key,
                                    String param)

  Gets a parameter value from the applet or source.

  Parameters:
    app - the applet used to retrieve the parameter
    key - the component used as the key for the parameter source hash table
    param - the parameter to retrieve
  Returns:
    parameter value

getParam

      public static String getParam(Applet app,
                                    Component comp,
                                    String comp_name,
                                    String param)

  Gets a parameter of the applet in the following precedence:

       <component_name>.<param>
       <param>

  Parameters:
    app - the applet whose parameter value is retrieved; if setParamSource() has previously been called, the value will be read from the specified buffer
    comp - the component used for converting images (if any) and for retrieving the parameter source
    comp_name - the component name
    param - the parameter to retrieve
  Returns:
    value string, or null if the param could not be found
  See Also:
    setParamSource, getParameter

error

      public static void error(String s,
                               String token)

  Writes a parse error message to stdout.

  Parameters:
    s - the entire string being parsed
    token - the string which could not be parsed

error

      public static void error(String msg)

  Writes a parse error message to stdout.

  Parameters:
    token - the string which could not be parsed

trim

      public static String trim(Object obj)

  Returns a trimmed string, with trailing nulls removed

  Parameters:
    obj - the object to trim
    String - the version of the object with trailing nulls removed

toInt

      public static int toInt(String s,
                              int def)

  Converts a string to an integer.

  Parameters:
    string - the string for conversion
    def - the default value to be used when a parsing error occurs

toDouble

      public static double toDouble(String s,
                                    double def)

  Converts a string to an double.

  Parameters:
    string - the string for conversion
    def - the default value to be used when a parsing error occurs

toBoolean

      public static boolean toBoolean(String s,
                                      boolean def)

  Converts a string to a boolean.

  Parameters:
    s - the string for conversion
    def - the default value to be used when a parsing error occurs

toBoolean

      public static boolean toBoolean(Applet app,
                                      Component comp,
                                      String comp_name,
                                      String param,
                                      boolean def)

  Retrieves a parameter and converts its value to a boolean value.

  Parameters:
    app - the applet used to retrieve the parameter value
    comp - key used for the parameter source hash table
    comp_name - the component name
    param - the parameter to retrieve
    def - the default value

toStringList

      public static String[] toStringList(String s)

  Converts a string to an array of Strings.

  Parameters:
    s - the comma-separated strings

toIntList

      public static int[] toIntList(String s,
                                    char delim)

  Converts a string to an array of integers based on the provided delimiter.

  Parameters:
    s - the string which will be converted to integers
    delim - the delimiter separating the integers in the string

toIntList

      public static int[] toIntList(String s,
                                    char delim,
                                    int def[])

  Converts a string to an array of integers based on the provided delimiter.

  Parameters:
    s - the string which will be converted to integers
    delim - the delimiter separating the integers in the string
    def - the default value, returned if a parse error occurs

toNewLine

      public static String toNewLine(String string)

  Converts all occurrences of "\n" to newlines.

fromNewLine

      public static String fromNewLine(String s)

  Converts all occurrences of char '\n' to string "\n"

toVector

      public static JCVector toVector(Component comp,
                                      String s,
                                      char delim,
                                      boolean convert)

  Converts a delimited list of tokens to a JCVector.

  Parameters:
    comp - any component
    s - the string to convert
    delim - the delimiter that separates the tokens in the string
    convert - if true, a token is converted to a JCString if it contains a square bracket ([)

toVector

      public static JCVector toVector(Component comp,
                                      String s,
                                      char delim,
                                      boolean convert,
                                      JCVector def)

  Converts a delimited list of tokens to a JCVector.

  Parameters:
    comp - any component
    s - the string to convert
    delim - the delimiter that separates the tokens in the string
    convert - if true, a token is converted to a JCString if it contains a square bracket ([)
    def - the default value, returned if a parse error occurs

toVectorFromCSV

      public static JCVector toVectorFromCSV(Component comp,
                                             String s)

  Converts a string using comma-separated value format.

  Parameters:
    comp - any component
    s - the string to be tokenized

toVectorFromCSV

      public static JCVector toVectorFromCSV(Component comp,
                                             String s,
                                             JCVector def)

  Converts a string using comma-separated value format.

  Parameters:
    comp - any component
    s - the string to be tokenized
    def - the default value, returned if a parse error occurs

toImage

      public static Image toImage(Component comp,
                                  String file,
                                  Image def)

  Returns an image which gets pixel data from the specified file. The MediaTracker class is used to wait until the image is loaded.

  Parameters:
    c - the component that is loading the image. If the component is an applet in a browser, Applet.getImage() is used in order to take advantage of Applet.getDocumentBase()
    file - the file containing the image to be loaded; if an http protocol is not specified (a ":" is not present), the current working directory is prepended to the file name
    def - the default value, returned if a parse error occurs
  See Also:
    MediaTracker

toImage

      public static Image toImage(Component comp,
                                  String file)

  Returns an image which gets pixel data from the specified file. The MediaTracker class is used to wait until the image is loaded.

  Parameters:
    c - the component that is loading the image. If the component is an applet in a browser, Applet.getImage() is used in order to take advantage of Applet.getDocumentBase()
    file - the file containing the image to be loaded; if an http protocol is not specified (a ":" is not present), the current working directory is prepended to the file name
  See Also:
    MediaTracker

waitForImage

      public static boolean waitForImage(Component comp,
                                         Image image)

  Waits for an image to be loaded, using the MediaTracker class.

  Returns:
    false if an error occurred
  See Also:
    MediaTracker

toImageList

      public static Image[] toImageList(Component comp,
                                        String s,
                                        Image def[])

  Returns an array of images which get pixel data from the specified file.

  Parameters:
    s - comma-separated list of files
    def - the default value, returned if a parse error occurs
  See Also:
    toImage

toColorList

      public static Color[] toColorList(String s,
                                        Color def[])

  Converts a string to an array of Colors.

  Parameters:
    s - the string containing color names separated by commas
    def - the default value, returned if a parse error occurs

toColorList

      public static Color[] toColorList(String s)

  Converts a string to an array of Colors.

  Parameters:
    s - the comma-separated color names

toColor

      public static Color toColor(String s,
                                  Color def)

  Converts a string to a Color.

  Parameters:
    s - the string containing a color name
    def - the default value, returned if a parse error occurs

toColor

      public static Color toColor(String s)

  Converts a string to a Color.

  Parameters:
    s - the string containing a color name

toFont

      public static Font toFont(String s,
                                Font def)

  Converts a font name to a font instance.

  Parameters:
    s - the string containing font name
    def - the default value, returned if a parse error occurs

toFont

      public static Font toFont(String s)

  Converts a font name to a font instance.

  Parameters:
    s - the string containing font name

toEnum

      public static int toEnum(String string,
                               String type,
                               String param,
                               String strings[][],
                               int values[][],
                               int def)

  Converts a string to an enum. If the string cannot be converted, an error message is written to the console.

  Parameters:
    string - the string to be converted
    type - the enum type
    param - the optional PARAM name for the enum, used for the error message
    strings - the first item in each list is the enum type; each string has a corresponding value in the values array
    values - list of values corresponding to the strings
    def - the default value, returned if the string could not be converted
  Returns:
    either the converted value or the default

toEnum

      public static int toEnum(String s,
                               String type,
                               String strings[],
                               int values[],
                               int def)

  Converts a string to an enum. If the string cannot be converted, an error message is written to the console.

  Parameters:
    s - the string to be converted
    type - the enum type (for the console message)
    strings - list of valid strings
    values - list of values corresponding to each string
    def - the default value, returned if the string could not be converted
  Returns:
    either the converted value or the default

toEnum

      public static long toEnum(String s,
                                String type,
                                String strings[],
                                long values[],
                                long def)

  Converts a string to an enum. If the string cannot be converted, an error message is written to the console.

  Parameters:
    s - the string to be converted
    type - the enum type (for the console message)
    strings - list of valid strings
    values - list of values corresponding to each string
    def - the default value, returned if the string could not be converted
  Returns:
    either the converted value or the default

toEnum

      public static int toEnum(String s,
                               String strings[],
                               int values[],
                               int def)

  Converts a string to an enum.

  Parameters:
    s - the string to be converted
    strings - list of valid strings
    values - list of values corresponding to each string
    def - the default value, returned if the string could not be converted
  Returns:
    the converted value or the default

toEnumList

      public static int[] toEnumList(String s,
                                     String type,
                                     String strings[],
                                     int values[],
                                     int def[])

  Converts a string to a list of enums. If the string cannot be converted, an error message is written to the console.

  Parameters:
    s - the comma-separated list of enums
    type - the enum type
    strings - valid strings
    values - list of values corresponding to each string
    def - the default value, returned if the string could not be converted
  Returns:
    either the converted value or the default

fromEnum

      public static String fromEnum(int value,
                                    String strings[],
                                    int values[])

  Converts an enum to a string.

  Parameters:
    value - the enum to be converted
    strings - list of valid strings
    values - list of values corresponding to each string
  Returns:
    either the converted value or null

fromEnum

      public static String fromEnum(int value,
                                    String param,
                                    String type,
                                    String strings[][],
                                    int values[][],
                                    String def)

  Converts an enum to a string. If the enum cannot be converted, an error message is written to the console.

  Parameters:
    value - the enum to be converted
    param - the optional PARAM name for the enum, used for the error message
    type - the enum type
    strings - The first item in each list is the enum type; each string has a corresponding value in the values array.
    values - list of values corresponding to the strings
    def - the default value, returned if the enum could not be converted
  Returns:
    either the converted value or the default

checkEnum

      public static void checkEnum(int value,
                                   String param,
                                   int values[])

  Checks the validity of an enum.

  Parameters:
    param - enum name, used for error message
  Throws: IllegalArgumentException
    If the value is invalid

toInsets

      public static Insets toInsets(String s,
                                    Insets def)

  Converts a string to an Insets instance.

  Parameters:
    s - the string containing the top, left, bottom and right values, separated by commas
    def - the default value, returned if the string could not be converted

toDimension

      public static Dimension toDimension(String s,
                                          Dimension def)

  Converts a string to a Dimension instance.

  Parameters:
    s - the string in the format [width]x[height]
    def - the default value, returned if the string could not be converted

toPoint

      public static Point toPoint(String s,
                                  Point def)

  Converts a string to a Point instance.

  Parameters:
    s - the string in the format [x],[y]
    def - the default value, returned if the string could not be converted

toString

      public static String toString(Object o)

  Converts an object to a string. If a String, newlines are replaced by "\n". If a Vector, it is converted to a comma-separated list.

toDate

      public static Date toDate(String s,
                                Date def)

  Converts a String to a Date

    All Packages  Class Hierarchy  This Package  Previous  Next  Index