org.apache.calcite.util

Class ConversionUtil

java.lang.Object

org.apache.calcite.util.ConversionUtil

public class ConversionUtil
extends Object

Utility functions for converting from one type to another

Field Summary

Fields

Modifier and Type	Field and Description
static String	NATIVE_UTF16_CHARSET_NAME
static 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 String	TEST_UNICODE_STRING A constant string which can be used wherever a Java string containing Unicode characters is needed in a test.

Method Summary

Methods

Modifier and Type	Method and Description
static Boolean	toBoolean(String str) Converts a string into a boolean
static byte[]	toByteArrayFromString(String value, int radix) Converts a string into a byte array.
static String	toStringFromApprox(double d, boolean isFloat) Converts an approximate value into a string, following the SQL 2003 standard.
static 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 String NATIVE_UTF16_CHARSET_NAME

TEST_UNICODE_STRING

public static final 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 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

Method Detail

toStringFromByteArray

public static 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(String value,
                           int radix)

Converts a string into a byte array. The inverse of toStringFromByteArray(byte[], int).

toStringFromApprox

public static String toStringFromApprox(double d,
                        boolean isFloat)

Converts an approximate value into a string, following the SQL 2003 standard.

toBoolean

public static Boolean toBoolean(String str)

Converts a string into a boolean