Package com.aowagie.text

Class Utilities

  • public class Utilities
extends java.lang.Object
    A collection of convenience methods that were present in many different iText classes.

    • Constructor Summary

      Constructors 
      Constructor Description
      Utilities()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      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 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
      (package private) static java.util.Set getKeySet​(java.util.Hashtable table)
      Gets the keys of a Hashtable
      private static float inchesToMillimeters​(float value)
      Measurement conversion from inches to millimeters.
      private 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.
      private 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).
      private static float millimetersToInches​(float value)
      Measurement conversion from millimeters to inches.
      private static float pointsToInches​(float value)
      Measurement conversion from points to inches.
      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 .
      (package private) static java.net.URL toURL​(java.lang.String filename)
      This method makes a valid URL from a given filename.
      (package private) 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

        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 - Attributes with properties
        key - Key to search
        Returns:
        a true/false value of a key in a Properties object

      • unEscapeURL

        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

        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 - Exception with information about the error

      • millimetersToInches

        private 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

      • pointsToInches

        private 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

        private 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

        private 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

        private 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