Package org.apache.calcite.util

Class ConversionUtil

  • public class ConversionUtil
extends java.lang.Object
    Utility functions for converting from one type to another

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static java.lang.String NATIVE_UTF16_CHARSET_NAME  
      static java.lang.String TEST_UNICODE_SQL_ESCAPED_LITERAL
      A constant string which can be used wherever a SQL literal containing Unicode escape characters is needed in a test.
      static java.lang.String TEST_UNICODE_STRING
      A constant string which can be used wherever a Java string containing Unicode characters is needed in a test.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private ConversionUtil()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.Boolean toBoolean​(java.lang.String str)
      Converts a string into a boolean
      static byte[] toByteArrayFromString​(java.lang.String value, int radix)
      Converts a string into a byte array.
      static java.lang.String toStringFromApprox​(double d, boolean isFloat)
      Converts an approximate value into a string, following the SQL 2003 standard.
      static java.lang.String toStringFromByteArray​(byte[] value, int radix)
      Converts a byte array into a bit string or a hex string.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • NATIVE_UTF16_CHARSET_NAME

        public static final java.lang.String NATIVE_UTF16_CHARSET_NAME

      • TEST_UNICODE_STRING

        public static final java.lang.String TEST_UNICODE_STRING
        A constant string which can be used wherever a Java string containing Unicode characters is needed in a test. It spells 'anthropos' in Greek.
        See Also:
        Constant Field Values

      • TEST_UNICODE_SQL_ESCAPED_LITERAL

        public static final java.lang.String TEST_UNICODE_SQL_ESCAPED_LITERAL
        A constant string which can be used wherever a SQL literal containing Unicode escape characters is needed in a test. It spells 'anthropos' in Greek. The escape character is the SQL default (backslash); note that the backslash-doubling here is for Java only, so by the time the SQL parser gets it, there is only one backslash.
        See Also:
        Constant Field Values

    • Constructor Detail

      • ConversionUtil

        private ConversionUtil()

    • Method Detail

      • toStringFromByteArray

        public static java.lang.String toStringFromByteArray​(byte[] value,
                                                     int radix)
        Converts a byte array into a bit string or a hex string.

        For example, toStringFromByteArray(new byte[] {0xAB, 0xCD}, 16) returns ABCD.

      • toByteArrayFromString

        public static byte[] toByteArrayFromString​(java.lang.String value,
                                           int radix)
        Converts a string into a byte array. The inverse of toStringFromByteArray(byte[], int).

      • toStringFromApprox

        public static java.lang.String toStringFromApprox​(double d,
                                                  boolean isFloat)
        Converts an approximate value into a string, following the SQL 2003 standard.

      • toBoolean

        public static java.lang.Boolean toBoolean​(java.lang.String str)
        Converts a string into a boolean