org.apache.commons.beanutils

## Class ConvertUtils

- java.lang.Object
- - org.apache.commons.beanutils.ConvertUtils

-     public class ConvertUtils
      extends Object

  Utility methods for converting String scalar values to objects of the specified Class, String arrays to arrays of the specified Class.

  For more details, see `ConvertUtilsBean` which provides the implementations for these methods.

  Version:
    $Id: ConvertUtils.java 1540518 2013-11-10 19:04:04Z oheger $
  See Also:
    `ConvertUtilsBean`

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `ConvertUtils()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `static String` | `convert(Object value)` Convert the specified value into a String.
    `static Object` | `convert(Object value, Class<?> targetType)` Convert the value to an object of the specified class (if possible).
    `static Object` | `convert(String[] values, Class<?> clazz)` Convert an array of specified values to an array of objects of the specified class (if possible).
    `static Object` | `convert(String value, Class<?> clazz)` Convert the specified value to an object of the specified class (if possible).
    `static void` | `deregister()` Remove all registered `Converter`s, and re-establish the standard Converters.
    `static void` | `deregister(Class<?> clazz)` Remove any registered `Converter` for the specified destination `Class`.
    `static boolean` | `getDefaultBoolean()` Deprecated. Register replacement converters for Boolean.TYPE and Boolean.class instead
    `static byte` | `getDefaultByte()` Deprecated. Register replacement converters for Byte.TYPE and Byte.class instead
    `static char` | `getDefaultCharacter()` Deprecated. Register replacement converters for Character.TYPE and Character.class instead
    `static double` | `getDefaultDouble()` Deprecated. Register replacement converters for Double.TYPE and Double.class instead
    `static float` | `getDefaultFloat()` Deprecated. Register replacement converters for Float.TYPE and Float.class instead
    `static int` | `getDefaultInteger()` Deprecated. Register replacement converters for Integer.TYPE and Integer.class instead
    `static long` | `getDefaultLong()` Deprecated. Register replacement converters for Long.TYPE and Long.class instead
    `static short` | `getDefaultShort()` Deprecated. Register replacement converters for Short.TYPE and Short.class instead
    `static Converter` | `lookup(Class<?> clazz)` Look up and return any registered `Converter` for the specified destination class; if there is no registered Converter, return `null`.
    `static Converter` | `lookup(Class<?> sourceType, Class<?> targetType)` Look up and return any registered `Converter` for the specified source and destination class; if there is no registered Converter, return `null`.
    `static <T> Class<T>` | `primitiveToWrapper(Class<T> type)` Change primitive Class types to the associated wrapper class.
    `static void` | `register(Converter converter, Class<?> clazz)` Register a custom `Converter` for the specified destination `Class`, replacing any previously registered Converter.
    `static void` | `setDefaultBoolean(boolean newDefaultBoolean)` Deprecated. Register replacement converters for Boolean.TYPE and Boolean.class instead
    `static void` | `setDefaultByte(byte newDefaultByte)` Deprecated. Register replacement converters for Byte.TYPE and Byte.class instead
    `static void` | `setDefaultCharacter(char newDefaultCharacter)` Deprecated. Register replacement converters for Character.TYPE and Character.class instead
    `static void` | `setDefaultDouble(double newDefaultDouble)` Deprecated. Register replacement converters for Double.TYPE and Double.class instead
    `static void` | `setDefaultFloat(float newDefaultFloat)` Deprecated. Register replacement converters for Float.TYPE and Float.class instead
    `static void` | `setDefaultInteger(int newDefaultInteger)` Deprecated. Register replacement converters for Integer.TYPE and Integer.class instead
    `static void` | `setDefaultLong(long newDefaultLong)` Deprecated. Register replacement converters for Long.TYPE and Long.class instead
    `static void` | `setDefaultShort(short newDefaultShort)` Deprecated. Register replacement converters for Short.TYPE and Short.class instead

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### ConvertUtils

          public ConvertUtils()

  - ### Method Detail

    - #### getDefaultBoolean

          @Deprecated
          public static boolean getDefaultBoolean()

      Deprecated. Register replacement converters for Boolean.TYPE and Boolean.class instead
      Gets the default value for Boolean conversions.
      Returns:
        The default Boolean value

    - #### setDefaultBoolean

          @Deprecated
          public static void setDefaultBoolean(boolean newDefaultBoolean)

      Deprecated. Register replacement converters for Boolean.TYPE and Boolean.class instead
      Sets the default value for Boolean conversions.
      Parameters:
        `newDefaultBoolean` - The default Boolean value

    - #### getDefaultByte

          @Deprecated
          public static byte getDefaultByte()

      Deprecated. Register replacement converters for Byte.TYPE and Byte.class instead
      Gets the default value for Byte conversions.
      Returns:
        The default Byte value

    - #### setDefaultByte

          @Deprecated
          public static void setDefaultByte(byte newDefaultByte)

      Deprecated. Register replacement converters for Byte.TYPE and Byte.class instead
      Sets the default value for Byte conversions.
      Parameters:
        `newDefaultByte` - The default Byte value

    - #### getDefaultCharacter

          @Deprecated
          public static char getDefaultCharacter()

      Deprecated. Register replacement converters for Character.TYPE and Character.class instead
      Gets the default value for Character conversions.
      Returns:
        The default Character value

    - #### setDefaultCharacter

          @Deprecated
          public static void setDefaultCharacter(char newDefaultCharacter)

      Deprecated. Register replacement converters for Character.TYPE and Character.class instead
      Sets the default value for Character conversions.
      Parameters:
        `newDefaultCharacter` - The default Character value

    - #### getDefaultDouble

          @Deprecated
          public static double getDefaultDouble()

      Deprecated. Register replacement converters for Double.TYPE and Double.class instead
      Gets the default value for Double conversions.
      Returns:
        The default Double value

    - #### setDefaultDouble

          @Deprecated
          public static void setDefaultDouble(double newDefaultDouble)

      Deprecated. Register replacement converters for Double.TYPE and Double.class instead
      Sets the default value for Double conversions.
      Parameters:
        `newDefaultDouble` - The default Double value

    - #### getDefaultFloat

          @Deprecated
          public static float getDefaultFloat()

      Deprecated. Register replacement converters for Float.TYPE and Float.class instead
      Get the default value for Float conversions.
      Returns:
        The default Float value

    - #### setDefaultFloat

          @Deprecated
          public static void setDefaultFloat(float newDefaultFloat)

      Deprecated. Register replacement converters for Float.TYPE and Float.class instead
      Sets the default value for Float conversions.
      Parameters:
        `newDefaultFloat` - The default Float value

    - #### getDefaultInteger

          @Deprecated
          public static int getDefaultInteger()

      Deprecated. Register replacement converters for Integer.TYPE and Integer.class instead
      Gets the default value for Integer conversions.
      Returns:
        The default Integer value

    - #### setDefaultInteger

          @Deprecated
          public static void setDefaultInteger(int newDefaultInteger)

      Deprecated. Register replacement converters for Integer.TYPE and Integer.class instead
      Sets the default value for Integer conversions.
      Parameters:
        `newDefaultInteger` - The default Integer value

    - #### getDefaultLong

          @Deprecated
          public static long getDefaultLong()

      Deprecated. Register replacement converters for Long.TYPE and Long.class instead
      Gets the default value for Long conversions.
      Returns:
        The default Long value

    - #### setDefaultLong

          @Deprecated
          public static void setDefaultLong(long newDefaultLong)

      Deprecated. Register replacement converters for Long.TYPE and Long.class instead
      Sets the default value for Long conversions.
      Parameters:
        `newDefaultLong` - The default Long value

    - #### getDefaultShort

          @Deprecated
          public static short getDefaultShort()

      Deprecated. Register replacement converters for Short.TYPE and Short.class instead
      Gets the default value for Short conversions.
      Returns:
        The default Short value

    - #### setDefaultShort

          @Deprecated
          public static void setDefaultShort(short newDefaultShort)

      Deprecated. Register replacement converters for Short.TYPE and Short.class instead
      Sets the default value for Short conversions.
      Parameters:
        `newDefaultShort` - The default Short value

    - #### convert

          public static String convert(Object value)

      Convert the specified value into a String.

      For more details see `ConvertUtilsBean`.

      Parameters:
        `value` - Value to be converted (may be null)
      Returns:
        The converted String value or null if value is null
      See Also:
        `ConvertUtilsBean.convert(Object)`

    - #### convert

          public static Object convert(String value,
                       Class<?> clazz)

      Convert the specified value to an object of the specified class (if possible). Otherwise, return a String representation of the value.

      For more details see `ConvertUtilsBean`.

      Parameters:
        `value` - Value to be converted (may be null)
        `clazz` - Java class to be converted to (must not be null)
      Returns:
        The converted value
      See Also:
        `ConvertUtilsBean.convert(String, Class)`

    - #### convert

          public static Object convert(String[] values,
                       Class<?> clazz)

      Convert an array of specified values to an array of objects of the specified class (if possible).

      For more details see `ConvertUtilsBean`.

      Parameters:
        `values` - Array of values to be converted
        `clazz` - Java array or element class to be converted to (must not be null)
      Returns:
        The converted value
      See Also:
        `ConvertUtilsBean.convert(String[], Class)`

    - #### convert

          public static Object convert(Object value,
                       Class<?> targetType)

      Convert the value to an object of the specified class (if possible).

      Parameters:
        `value` - Value to be converted (may be null)
        `targetType` - Class of the value to be converted to (must not be null)
      Returns:
        The converted value
      Throws:
        `ConversionException` - if thrown by an underlying Converter

    - #### deregister

          public static void deregister()

      Remove all registered `Converter`s, and re-establish the standard Converters.

      For more details see `ConvertUtilsBean`.

      See Also:
        `ConvertUtilsBean.deregister()`

    - #### deregister

          public static void deregister(Class<?> clazz)

      Remove any registered `Converter` for the specified destination `Class`.

      For more details see `ConvertUtilsBean`.

      Parameters:
        `clazz` - Class for which to remove a registered Converter
      See Also:
        `ConvertUtilsBean.deregister(Class)`

    - #### lookup

          public static Converter lookup(Class<?> clazz)

      Look up and return any registered `Converter` for the specified destination class; if there is no registered Converter, return `null`.

      For more details see `ConvertUtilsBean`.

      Parameters:
        `clazz` - Class for which to return a registered Converter
      Returns:
        The registered `Converter` or `null` if not found
      See Also:
        `ConvertUtilsBean.lookup(Class)`

    - #### lookup

          public static Converter lookup(Class<?> sourceType,
                         Class<?> targetType)

      Look up and return any registered `Converter` for the specified source and destination class; if there is no registered Converter, return `null`.
      Parameters:
        `sourceType` - Class of the value being converted
        `targetType` - Class of the value to be converted to
      Returns:
        The registered `Converter` or `null` if not found

    - #### register

          public static void register(Converter converter,
                      Class<?> clazz)

      Register a custom `Converter` for the specified destination `Class`, replacing any previously registered Converter.

      For more details see `ConvertUtilsBean`.

      Parameters:
        `converter` - Converter to be registered
        `clazz` - Destination class for conversions performed by this Converter
      See Also:
        `ConvertUtilsBean.register(Converter, Class)`

    - #### primitiveToWrapper

          public static <T> Class<T> primitiveToWrapper(Class<T> type)

      Change primitive Class types to the associated wrapper class. This is useful for concrete converter implementations which typically treat primitive types like their corresponding wrapper types.
      Type Parameters:
        `T` - The type to be checked.
      Parameters:
        `type` - The class type to check.
      Returns:
        The converted type.
      Since:
        1.9

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