com.lowagie.text
Class Utilities

java.lang.Object
  com.lowagie.text.Utilities

public class Utilities
extends java.lang.Object

A collection of convenience methods that were present in many different iText classes.

Constructor Summary

Utilities()

Method Summary

static java.lang.Object[][]	addToArray(java.lang.Object[][] original, java.lang.Object[] item) Utility method to extend an array.
static boolean	checkTrueOrFalse(java.util.Properties attributes, java.lang.String key) Checks for a true/false value of a key in a Properties object.
static java.lang.String	convertFromUtf32(int codePoint) Converts a UTF32 code point value to a String with the corresponding character(s).
static int	convertToUtf32(char[] text, int idx) Converts a unicode character in a character array to a UTF 32 code point value.
static int	convertToUtf32(char highSurrogate, char lowSurrogate) Returns the code point of a UTF32 character corresponding with a high and a low surrogate value.
static int	convertToUtf32(java.lang.String text, int idx) Converts a unicode character in a String to a UTF32 code point value
static java.util.Set	getKeySet(java.util.Hashtable table) Gets the keys of a Hashtable
static float	inchesToMillimeters(float value) Measurement conversion from inches to millimeters.
static float	inchesToPoints(float value) Measurement conversion from inches to points.
static boolean	isSurrogateHigh(char c) Check if the value of a character belongs to a certain interval that indicates it's the higher part of a surrogate pair.
static boolean	isSurrogateLow(char c) Check if the value of a character belongs to a certain interval that indicates it's the lower part of a surrogate pair.
static boolean	isSurrogatePair(char[] text, int idx) Checks if two subsequent characters in a character array are are the higher and the lower character in a surrogate pair (and therefore eligible for conversion to a UTF 32 character).
static boolean	isSurrogatePair(java.lang.String text, int idx) Checks if two subsequent characters in a String are are the higher and the lower character in a surrogate pair (and therefore eligible for conversion to a UTF 32 character).
static float	millimetersToInches(float value) Measurement conversion from millimeters to inches.
static float	millimetersToPoints(float value) Measurement conversion from millimeters to points.
static float	pointsToInches(float value) Measurement conversion from points to inches.
static float	pointsToMillimeters(float value) Measurement conversion from points to millimeters.
static void	skip(java.io.InputStream is, int size) This method is an alternative for the InputStream.skip() -method that doesn't seem to work properly for big values of size .
static java.net.URL	toURL(java.lang.String filename) This method makes a valid URL from a given filename.
static java.lang.String	unEscapeURL(java.lang.String src) Unescapes an URL.

Methods inherited from class java.lang.Object

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

Constructor Detail

Utilities

public Utilities()

Method Detail

getKeySet

public static java.util.Set getKeySet(java.util.Hashtable table)

Gets the keys of a Hashtable

Parameters:

table - a Hashtable

Returns:

the keyset of a Hashtable (or an empty set if table is null)

addToArray

public static java.lang.Object[][] addToArray(java.lang.Object[][] original,
                                              java.lang.Object[] item)

Utility method to extend an array.

Parameters:

original - the original array or null

item - the item to be added to the array

Returns:

a new array with the item appended

checkTrueOrFalse

public static boolean checkTrueOrFalse(java.util.Properties attributes,
                                       java.lang.String key)

Checks for a true/false value of a key in a Properties object.

Parameters:

attributes -

key -

Returns:

a true/false value of a key in a Properties object

unEscapeURL

public static java.lang.String unEscapeURL(java.lang.String src)

Unescapes an URL. All the "%xx" are replaced by the 'xx' hex char value.

Parameters:

src - the url to unescape

Returns:

the unescaped value

toURL

public static java.net.URL toURL(java.lang.String filename)
                          throws java.net.MalformedURLException

This method makes a valid URL from a given filename.

This method makes the conversion of this library from the JAVA 2 platform to a JDK1.1.x-version easier.

Parameters:

filename - a given filename

Returns:

a valid URL

Throws:

java.net.MalformedURLException

skip

public static void skip(java.io.InputStream is,
                        int size)
                 throws java.io.IOException

This method is an alternative for the InputStream.skip() -method that doesn't seem to work properly for big values of size .

Parameters:

is - the InputStream

size - the number of bytes to skip

Throws:

java.io.IOException

millimetersToPoints

public static final float millimetersToPoints(float value)

Measurement conversion from millimeters to points.

Parameters:

value - a value in millimeters

Returns:

a value in points

Since:

2.1.2

millimetersToInches

public static final float millimetersToInches(float value)

Measurement conversion from millimeters to inches.

Parameters:

value - a value in millimeters

Returns:

a value in inches

Since:

2.1.2

pointsToMillimeters

public static final float pointsToMillimeters(float value)

Measurement conversion from points to millimeters.

Parameters:

value - a value in points

Returns:

a value in millimeters

Since:

2.1.2

pointsToInches

public static final float pointsToInches(float value)

Measurement conversion from points to inches.

Parameters:

value - a value in points

Returns:

a value in inches

Since:

2.1.2

inchesToMillimeters

public static final float inchesToMillimeters(float value)

Measurement conversion from inches to millimeters.

Parameters:

value - a value in inches

Returns:

a value in millimeters

Since:

2.1.2

inchesToPoints

public static final float inchesToPoints(float value)

Measurement conversion from inches to points.

Parameters:

value - a value in inches

Returns:

a value in points

Since:

2.1.2

isSurrogateHigh

public static boolean isSurrogateHigh(char c)

Check if the value of a character belongs to a certain interval that indicates it's the higher part of a surrogate pair.

Parameters:

c - the character

Returns:

true if the character belongs to the interval

Since:

2.1.2

isSurrogateLow

public static boolean isSurrogateLow(char c)

Check if the value of a character belongs to a certain interval that indicates it's the lower part of a surrogate pair.

Parameters:

c - the character

Returns:

true if the character belongs to the interval

Since:

2.1.2

isSurrogatePair

public static boolean isSurrogatePair(java.lang.String text,
                                      int idx)

Checks if two subsequent characters in a String are are the higher and the lower character in a surrogate pair (and therefore eligible for conversion to a UTF 32 character).

Parameters:

text - the String with the high and low surrogate characters

idx - the index of the 'high' character in the pair

Returns:

true if the characters are surrogate pairs

Since:

2.1.2

isSurrogatePair

public static boolean isSurrogatePair(char[] text,
                                      int idx)

Checks if two subsequent characters in a character array are are the higher and the lower character in a surrogate pair (and therefore eligible for conversion to a UTF 32 character).

Parameters:

text - the character array with the high and low surrogate characters

idx - the index of the 'high' character in the pair

Returns:

true if the characters are surrogate pairs

Since:

2.1.2

convertToUtf32

public static int convertToUtf32(char highSurrogate,
                                 char lowSurrogate)

Returns the code point of a UTF32 character corresponding with a high and a low surrogate value.

Parameters:

highSurrogate - the high surrogate value

lowSurrogate - the low surrogate value

Returns:

a code point value

Since:

2.1.2

convertToUtf32

public static int convertToUtf32(char[] text,
                                 int idx)

Converts a unicode character in a character array to a UTF 32 code point value.

Parameters:

text - a character array that has the unicode character(s)

idx - the index of the 'high' character

Returns:

the code point value

Since:

2.1.2

convertToUtf32

public static int convertToUtf32(java.lang.String text,
                                 int idx)

Converts a unicode character in a String to a UTF32 code point value

Parameters:

text - a String that has the unicode character(s)

idx - the index of the 'high' character

Returns:

the codepoint value

Since:

2.1.2

convertFromUtf32

public static java.lang.String convertFromUtf32(int codePoint)

Converts a UTF32 code point value to a String with the corresponding character(s).

Parameters:

codePoint - a Unicode value

Returns:

the corresponding characters in a String

Since:

2.1.2