Package jmri.util

Class TypeConversionUtil

java.lang.Object

jmri.util.TypeConversionUtil

public final class TypeConversionUtil
extends Object

Converts between java types, for example String to Double and double to boolean.

Constructor Summary

Constructors

Constructor	Description
TypeConversionUtil()

Method Summary

Modifier and Type	Method	Description
static boolean	convertToBoolean(Object value, boolean do_i18n)	Convert a value to a boolean.
static boolean	convertToBoolean_JythonRules(Object value, boolean do_i18n)	Convert a value to a boolean by Jython rules.
static double	convertToDouble(Object value, boolean do_i18n)	Convert a value to a double.
static double	convertToDouble(Object value, boolean do_i18n, boolean checkAll, boolean throwOnError)	Convert a value to a double.
static double	convertToDouble(Object value, boolean do_i18n, boolean checkAll, boolean throwOnError, boolean warnOnError)	Convert a value to a double.
static long	convertToLong(Object value)	Convert a value to a long.
static long	convertToLong(Object value, boolean checkAll, boolean throwOnError)	Convert a value to a long.
static long	convertToLong(Object value, boolean checkAll, boolean throwOnError, boolean warnOnError)	Convert a value to a long.
static String	convertToString(Object value, boolean do_i18n)	Convert a value to a String.
static boolean	isFloatingNumber(Object object)	Is this object an integer or a floating point number?
static boolean	isIntegerNumber(Object object)	Is this object an integer number?
static boolean	isString(Object object)	Is this object a String?

Methods inherited from class java.lang.Object

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

Constructor Details

TypeConversionUtil

public TypeConversionUtil()

Method Details

isIntegerNumber

public static boolean isIntegerNumber(Object object)

Is this object an integer number?

The method returns true if the object is any of these classes:

• AtomicInteger
• AtomicLong
• BigInteger
• Byte
• Short
• Integer
• Long

Parameters:

object - the object to check

Returns:

true if the object is an object that is an integer, false otherwise

isFloatingNumber

public static boolean isFloatingNumber(Object object)

Is this object an integer or a floating point number?

The method returns true if the object is any of these classes:

• AtomicInteger
• AtomicLong
• BigInteger
• Byte
• Short
• Integer
• Long
• BigDecimal
• Float
• Double

Parameters:

object - the object to check

Returns:

true if the object is an object that is either an integer or a float, false otherwise

isString

public static boolean isString(Object object)

Is this object a String?

Parameters:

object - the object to check

Returns:

true if the object is a String, false otherwise

convertToBoolean

public static boolean convertToBoolean(@CheckForNull
 Object value,
 boolean do_i18n)

Convert a value to a boolean.

Rules: "0" string is converted to false "0.000" string is converted to false, if the number of decimals is > 0 An integer number is converted to false if the number is 0 A floating number is converted to false if the number is -0.5 < x < 0.5 The string "true" (case insensitive) returns true. The string "false" (case insensitive) returns false. A Reportable is first converted to a string using toReportString() and then treated as a string. A JSON TextNode is first converted to a string using asText() and then treated as a string. Everything else throws an exception.

For objects that implement the Reportable interface, the value is fetched from the method toReportString().

Parameters:

value - the value to convert

do_i18n - true if internationalization should be done, false otherwise

Returns:

the boolean value

convertToBoolean_JythonRules

public static boolean convertToBoolean_JythonRules(@CheckForNull
 Object value,
 boolean do_i18n)

Convert a value to a boolean by Jython rules.

Rules: null is converted to false empty string is converted to false "0" string is converted to false "0.000" string is converted to false, if the number of decimals is > 0 empty map is converted to false empty collection is converted to false An integer number is converted to false if the number is 0 A floating number is converted to false if the number is -0.5 < x < 0.5 Everything else is converted to true

For objects that implement the Reportable interface, the value is fetched from the method toReportString().

Parameters:

value - the value to convert

do_i18n - true if internationalization should be done, false otherwise

Returns:

the boolean value

convertToLong

public static long convertToLong(@CheckForNull
 Object value)

Convert a value to a long.

Rules: null is converted to 0 empty string is converted to 0 empty collection is converted to 0 an instance of the interface Number is converted to the number a string that can be parsed as a number is converted to that number. a string that doesn't start with a digit is converted to 0

For objects that implement the Reportable interface, the value is fetched from the method toReportString() before doing the conversion.

Parameters:

value - the value to convert

Returns:

the long value

convertToLong

public static long convertToLong(@CheckForNull
 Object value,
 boolean checkAll,
 boolean throwOnError)

Convert a value to a long.

Rules: null is converted to 0 empty string is converted to 0 empty collection is converted to 0 an instance of the interface Number is converted to the number a string that can be parsed as a number is converted to that number. a string that doesn't start with a digit is converted to 0

For objects that implement the Reportable interface, the value is fetched from the method toReportString() before doing the conversion.

Parameters:

value - the value to convert

checkAll - true if the whole string should be checked, false otherwise

throwOnError - true if a NumberFormatException should be thrown on error, false otherwise

Returns:

the long value

Throws:

NumberFormatException - on error if throwOnError is true

convertToLong

public static long convertToLong(@CheckForNull
 Object value,
 boolean checkAll,
 boolean throwOnError,
 boolean warnOnError)
                          throws NumberFormatException

Convert a value to a long.

Rules: null is converted to 0 empty string is converted to 0 empty collection is converted to 0 an instance of the interface Number is converted to the number a string that can be parsed as a number is converted to that number. a string that doesn't start with a digit is converted to 0

For objects that implement the Reportable interface, the value is fetched from the method toReportString() before doing the conversion.

Parameters:

value - the value to convert

checkAll - true if the whole string should be checked, false otherwise

throwOnError - true if a NumberFormatException should be thrown on error, false otherwise

warnOnError - true if a warning message should be logged on error

Returns:

the long value

Throws:

NumberFormatException - on error if throwOnError is true

convertToDouble

public static double convertToDouble(@CheckForNull
 Object value,
 boolean do_i18n)

Convert a value to a double.

Rules: null is converted to 0 empty string is converted to 0 empty collection is converted to 0 an instance of the interface Number is converted to the number a string that can be parsed as a number is converted to that number. if a string starts with a number AND do_i18n is false, it's converted to that number a string that doesn't start with a digit is converted to 0

For objects that implement the Reportable interface, the value is fetched from the method toReportString() before doing the conversion.

Parameters:

value - the value to convert

do_i18n - true if internationalization should be done, false otherwise

Returns:

the double value

convertToDouble

public static double convertToDouble(@CheckForNull
 Object value,
 boolean do_i18n,
 boolean checkAll,
 boolean throwOnError)

Convert a value to a double.

Rules: null is converted to 0 empty string is converted to 0 empty collection is converted to 0 an instance of the interface Number is converted to the number a string that can be parsed as a number is converted to that number. if a string starts with a number AND do_i18n is false, it's converted to that number a string that doesn't start with a digit is converted to 0

For objects that implement the Reportable interface, the value is fetched from the method toReportString() before doing the conversion.

Parameters:

value - the value to convert

do_i18n - true if internationalization should be done, false otherwise

checkAll - true if the whole string should be checked, false otherwise

throwOnError - true if a NumberFormatException should be thrown on error, false otherwise

Returns:

the double value

Throws:

NumberFormatException - on error if throwOnError is true

convertToDouble

public static double convertToDouble(@CheckForNull
 Object value,
 boolean do_i18n,
 boolean checkAll,
 boolean throwOnError,
 boolean warnOnError)

Convert a value to a double.

Rules: null is converted to 0 empty string is converted to 0 empty collection is converted to 0 an instance of the interface Number is converted to the number a string that can be parsed as a number is converted to that number. if a string starts with a number AND do_i18n is false, it's converted to that number a string that doesn't start with a digit is converted to 0

For objects that implement the Reportable interface, the value is fetched from the method toReportString() before doing the conversion.

Parameters:

value - the value to convert

do_i18n - true if internationalization should be done, false otherwise

checkAll - true if the whole string should be checked, false otherwise

throwOnError - true if a NumberFormatException should be thrown on error, false otherwise

warnOnError - true if a warning message should be logged on error

Returns:

the double value

Throws:

NumberFormatException - on error if throwOnError is true

convertToString

@Nonnull
public static String convertToString(@CheckForNull
 Object value,
 boolean do_i18n)

Convert a value to a String.

Parameters:

value - the value to convert

do_i18n - true if internationalization should be done, false otherwise

Returns:

the String value