Package org.apache.sis.util

## Class ArgumentChecks

- Object
- - Static
  - - ArgumentChecks

-     public final class ArgumentChecks
      extends Static

  Static methods for performing argument checks. Every methods in this class can throw one of the following exceptions:

  Exceptions thrown on illegal argument
  Exception | Thrown by
  --- | ---
  `NullArgumentException` | `ensureNonNull`, `ensureNonEmpty`.
  `IllegalArgumentException` | `ensureNonEmpty`, `ensurePositive`, `ensureStrictlyPositive`, `ensureBetween`, `ensureBetween`, `ensureCanCast`.
  `IndexOutOfBoundsException` | `ensureValidIndex`.
  `MismatchedDimensionException` | `ensureDimensionMatches`.

  More specialized `ensureXXX(…)` methods are provided in the following classes:
  - `Units`: `ensureAngular`, `ensureLinear`, `ensureTemporal`, `ensureScale`.
  Method Arguments
  By convention, the value to check is always the last parameter given to every methods in this class. The other parameters may include the programmatic name of the argument being checked. This programmatic name is used for building an error message localized in the default locale if the check failed.
  Since:
    0.3

  Defined in the `sis-utility` module

- - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `static void` | `ensureBetween​(String name, double min, double max, double value)` | Ensures that the given floating point value is between the given bounds, inclusive.
    `static void` | `ensureBetween​(String name, float min, float max, float value)` | Ensures that the given floating point value is between the given bounds, inclusive.
    `static void` | `ensureBetween​(String name, int min, int max, int value)` | Ensures that the given integer value is between the given bounds, inclusive.
    `static void` | `ensureBetween​(String name, long min, long max, long value)` | Ensures that the given long value is between the given bounds, inclusive.
    `static void` | `ensureCanCast​(String name, Class<?> expectedType, Object value)` | Ensures that the specified value is null or an instance assignable to the given type.
    `static void` | `ensureDimensionMatches​(String name, int expected, double[] vector)` | Ensures that the given vector, if non-null, has the expected number of dimensions (taken as its length).
    `static void` | `ensureDimensionMatches​(String name, int expected, int[] indices)` | Ensures that the given array of indices, if non-null, has the expected number of dimensions (taken as its length).
    `static void` | `ensureDimensionMatches​(String name, int expected, DirectPosition position)` | Ensures that the given direct position, if non-null, has the expected number of dimensions.
    `static void` | `ensureDimensionMatches​(String name, int expected, Envelope envelope)` | Ensures that the given envelope, if non-null, has the expected number of dimensions.
    `static void` | `ensureDimensionMatches​(String name, int expected, CoordinateReferenceSystem crs)` | Ensures that the given CRS, if non-null, has the expected number of dimensions.
    `static void` | `ensureDimensionMatches​(String name, int expected, CoordinateSystem cs)` | Ensures that the given coordinate system, if non-null, has the expected number of dimensions.
    `static void` | `ensureExpectedCount​(String name, int expected, int actual)` | Ensures that a method receiving a variable number of arguments got the expected count.
    `static void` | `ensureFinite​(String name, double value)` | Ensures that the given floating point value is not NaN neither Double.isInfinite(double).
    `static void` | `ensureFinite​(String name, float value)` | Ensures that the given floating point value is not NaN neither Float.isInfinite(float).
    `static void` | `ensureNonEmpty​(String name, int[] values, int min, int max, boolean distinct)` | Ensures that the given `values` array is non-null and non-empty.
    `static void` | `ensureNonEmpty​(String name, CharSequence text)` | Makes sure that a character sequence is non-null and non-empty.
    `static void` | `ensureNonEmpty​(String name, Object[] array)` | Makes sure that an array is non-null and non-empty.
    `static void` | `ensureNonNull​(String name, Object object)` | Makes sure that an argument is non-null.
    `static void` | `ensureNonNullElement​(String name, int index, Object element)` | Makes sure that an array element is non-null.
    `static void` | `ensurePositive​(String name, double value)` | Ensures that the given floating point value is not NaN and is greater than or equals to zero.
    `static void` | `ensurePositive​(String name, float value)` | Ensures that the given floating point value is not NaN and is greater than or equals to zero.
    `static void` | `ensurePositive​(String name, int value)` | Ensures that the given integer value is greater than or equals to zero.
    `static void` | `ensurePositive​(String name, long value)` | Ensures that the given long value is greater than or equals to zero.
    `static void` | `ensureSizeBetween​(String name, int min, int max, int size)` | Ensures that the given collection size or array length is between the given bounds, inclusive.
    `static void` | `ensureStrictlyPositive​(String name, double value)` | Ensures that the given floating point value is not NaN and is greater than zero.
    `static void` | `ensureStrictlyPositive​(String name, float value)` | Ensures that the given floating point value is not NaN and is greater than zero.
    `static void` | `ensureStrictlyPositive​(String name, int value)` | Ensures that the given integer value is greater than zero.
    `static void` | `ensureStrictlyPositive​(String name, long value)` | Ensures that the given long value is greater than zero.
    `static void` | `ensureValidIndex​(int upper, int index)` | Ensures that the given index is equals or greater than zero and lower than the given upper value.
    `static void` | `ensureValidIndexRange​(int length, int lower, int upper)` | Ensures that the given index range is valid for a sequence of the given length.
    `static void` | `ensureValidUnicodeCodePoint​(String name, int code)` | Ensures that the given integer is a valid Unicode code point.

    - ### Methods inherited from class Object

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

- - ### Method Detail

    - #### ensureNonNull

          public static void ensureNonNull​(String name,
                                           Object object)
                                    throws NullArgumentException

      Makes sure that an argument is non-null. If the given `object` is null, then a `NullArgumentException` is thrown with a localized message containing the given name.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `object` - the user argument to check against null value.
      Throws:
        `NullArgumentException` - if `object` is null.

    - #### ensureNonNullElement

          public static void ensureNonNullElement​(String name,
                                                  int index,
                                                  Object element)
                                           throws NullArgumentException

      Makes sure that an array element is non-null. If `element` is null, then a `NullArgumentException` is thrown with a localized message containing the given name and index. The name and index are formatted as below:
      - If the `name` contains the `"[#]"` sequence of characters, then the `'#'` character is replaced by the `index` value. For example if `name` is `"axes[#].unit"` and the index is 2, then the formatted message will contain `"axes[2].unit"`.
      - If the `name` does not contain the `"[#]"` sequence of characters, then `index` value is appended between square brackets. For example if `name` is `"axes"` and the index is 2, then the formatted message will contain `"axes[2]"`.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `index` - the Index of the element to check in an array or a list. Used only if an exception is thrown.
        `element` - the array or list element to check against null value.
      Throws:
        `NullArgumentException` - if `element` is null.

    - #### ensureNonEmpty

          public static void ensureNonEmpty​(String name,
                                            CharSequence text)
                                     throws NullArgumentException,
                                            IllegalArgumentException

      Makes sure that a character sequence is non-null and non-empty. If the given `text` is null, then a `NullArgumentException` is thrown. Otherwise if the given `text` has a length equals to 0, then an `IllegalArgumentException` is thrown.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `text` - the user argument to check against null value and empty sequences.
      Throws:
        `NullArgumentException` - if `text` is null.
        `IllegalArgumentException` - if `text` is empty.

    - #### ensureNonEmpty

          public static void ensureNonEmpty​(String name,
                                            Object[] array)
                                     throws NullArgumentException,
                                            IllegalArgumentException

      Makes sure that an array is non-null and non-empty. If the given `array` is null, then a `NullArgumentException` is thrown. Otherwise if the array length is equals to 0, then an `IllegalArgumentException` is thrown.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `array` - the user argument to check against null value and empty array.
      Throws:
        `NullArgumentException` - if `array` is null.
        `IllegalArgumentException` - if `array` is empty.
      Since:
        1.0

    - #### ensureNonEmpty

          public static void ensureNonEmpty​(String name,
                                            int[] values,
                                            int min,
                                            int max,
                                            boolean distinct)
                                     throws IllegalArgumentException

      Ensures that the given `values` array is non-null and non-empty. This method can also ensures that all values are between the given bounds (inclusive) and are distinct. The distinct values requirement is useful for validating arrays of spatiotemporal dimension indices, where dimensions can not be repeated.

      Note that a successful call to `ensureNonEmpty(name, values, 0, max, true)` implies 1 ≦ `values​.length` ≦ `max`.

      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `values` - integer values to validate.
        `min` - the minimal allowed value (inclusive), or `Integer​.MIN_VALUE` if none.
        `max` - the maximal allowed value (inclusive), or `Integer​.MAX_VALUE` if none.
        `distinct` - `true` if each value must be unique.
      Throws:
        `NullArgumentException` - if `values` is null.
        `IllegalArgumentException` - if `values` is empty, contains a value lower than `min`, contains a value greater than `max`, or contains duplicated values while `distinct` is `true`.
      Since:
        1.0

    - #### ensureExpectedCount

          public static void ensureExpectedCount​(String name,
                                                 int expected,
                                                 int actual)

      Ensures that a method receiving a variable number of arguments got the expected count. If `actual` = `expected`, then this method does nothing. Otherwise a message saying "Too few" or "Too many arguments" is thrown.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `expected` - expected number of arguments.
        `actual` - actual number of arguments.
      Since:
        1.0

    - #### ensureCanCast

          public static void ensureCanCast​(String name,
                                           Class<?> expectedType,
                                           Object value)
                                    throws IllegalArgumentException

      Ensures that the specified value is null or an instance assignable to the given type. If this method does not thrown an exception, then the value can be casted to the class represented by `expectedType` without throwing a `ClassCastException`.
      Parameters:
        `name` - the name of the argument to be checked, used only if an exception is thrown. Can be `null` if the name is unknown.
        `expectedType` - the expected type (class or interface).
        `value` - the value to check, or `null`.
      Throws:
        `IllegalArgumentException` - if `value` is non-null and is not assignable to the given type.
      See Also:
        `Containers​.property(Map, Object, Class)`

    - #### ensureValidIndex

          public static void ensureValidIndex​(int upper,
                                              int index)
                                       throws IndexOutOfBoundsException

      Ensures that the given index is equals or greater than zero and lower than the given upper value. This method is designed for methods that expect an index value as the only argument. For this reason, this method does not take the argument name.
      Parameters:
        `upper` - the maximal index value, exclusive.
        `index` - the index to check.
      Throws:
        `IndexOutOfBoundsException` - if the given index is negative or not lower than the given upper value.
      See Also:
        `ensurePositive(String, int)`

    - #### ensureValidIndexRange

          public static void ensureValidIndexRange​(int length,
                                                   int lower,
                                                   int upper)
                                            throws IndexOutOfBoundsException

      Ensures that the given index range is valid for a sequence of the given length. This method is designed for methods that expect an index range as their only arguments. For this reason, this method does not take argument names.

      This method verifies only the `lower` and `upper` argument values. It does not not verify the validity of the `length` argument, because this information is assumed to be provided by the implementation rather than the user.

      Parameters:
        `length` - the length of the sequence (array, `CharSequence`, etc.).
        `lower` - the user-specified lower index, inclusive.
        `upper` - the user-specified upper index, exclusive.
      Throws:
        `IndexOutOfBoundsException` - if the given [`lower` … `upper`] range is out of the sequence index range.
      See Also:
        `ensureSizeBetween(String, int, int, int)`

    - #### ensurePositive

          public static void ensurePositive​(String name,
                                            int value)
                                     throws IllegalArgumentException

      Ensures that the given integer value is greater than or equals to zero. This method is used for checking values that are not index. For checking index values, use `ensureValidIndex(int, int)` instead.
      Parameters:
        `name` - the name of the argument to be checked, used only if an exception is thrown.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is negative.
      See Also:
        `ensureValidIndex(int, int)`, `ensureStrictlyPositive(String, int)`

    - #### ensurePositive

          public static void ensurePositive​(String name,
                                            long value)
                                     throws IllegalArgumentException

      Ensures that the given long value is greater than or equals to zero.
      Parameters:
        `name` - the name of the argument to be checked, used only if an exception is thrown.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is negative.
      See Also:
        `ensureStrictlyPositive(String, long)`

    - #### ensurePositive

          public static void ensurePositive​(String name,
                                            float value)
                                     throws IllegalArgumentException

      Ensures that the given floating point value is not NaN and is greater than or equals to zero. Note that positive infinity is considered a valid value.
      Parameters:
        `name` - the name of the argument to be checked, used only if an exception is thrown.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is NaN or negative.
      See Also:
        `ensureStrictlyPositive(String, float)`

    - #### ensurePositive

          public static void ensurePositive​(String name,
                                            double value)
                                     throws IllegalArgumentException

      Ensures that the given floating point value is not NaN and is greater than or equals to zero. Note that positive infinity is considered a valid value.
      Parameters:
        `name` - the name of the argument to be checked, used only if an exception is thrown.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is NaN or negative.
      See Also:
        `ensureStrictlyPositive(String, double)`

    - #### ensureStrictlyPositive

          public static void ensureStrictlyPositive​(String name,
                                                    int value)
                                             throws IllegalArgumentException

      Ensures that the given integer value is greater than zero.
      Parameters:
        `name` - the name of the argument to be checked, used only if an exception is thrown.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is negative or equals to zero.
      See Also:
        `ensurePositive(String, int)`

    - #### ensureStrictlyPositive

          public static void ensureStrictlyPositive​(String name,
                                                    long value)
                                             throws IllegalArgumentException

      Ensures that the given long value is greater than zero.
      Parameters:
        `name` - the name of the argument to be checked, used only if an exception is thrown.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is negative or equals to zero.
      See Also:
        `ensurePositive(String, long)`

    - #### ensureStrictlyPositive

          public static void ensureStrictlyPositive​(String name,
                                                    float value)
                                             throws IllegalArgumentException

      Ensures that the given floating point value is not NaN and is greater than zero. Note that positive infinity is considered a valid value.
      Parameters:
        `name` - the name of the argument to be checked, used only if an exception is thrown.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is NaN, zero or negative.
      See Also:
        `ensurePositive(String, float)`

    - #### ensureStrictlyPositive

          public static void ensureStrictlyPositive​(String name,
                                                    double value)
                                             throws IllegalArgumentException

      Ensures that the given floating point value is not NaN and is greater than zero. Note that positive infinity is considered a valid value.
      Parameters:
        `name` - the name of the argument to be checked, used only if an exception is thrown.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is NaN, zero or negative.
      See Also:
        `ensurePositive(String, double)`

    - #### ensureFinite

          public static void ensureFinite​(String name,
                                          float value)

      Ensures that the given floating point value is not NaN neither Float.isInfinite(float). The value can be negative, zero or positive.
      Parameters:
        `name` - the name of the argument to be checked, used only if an exception is thrown.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is NaN or infinite.

    - #### ensureFinite

          public static void ensureFinite​(String name,
                                          double value)

      Ensures that the given floating point value is not NaN neither Double.isInfinite(double). The value can be negative, zero or positive.
      Parameters:
        `name` - the name of the argument to be checked, used only if an exception is thrown.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is NaN or infinite.

    - #### ensureBetween

          public static void ensureBetween​(String name,
                                           int min,
                                           int max,
                                           int value)
                                    throws IllegalArgumentException

      Ensures that the given integer value is between the given bounds, inclusive. This is a general-purpose method for checking integer arguments. Note that the following specialized methods are provided for common kinds of integer range checks:
      - `ensureSizeBetween(…)` if the `value` argument is a collection size or an array length.
      - `ensureValidIndex(…)` if the `value` argument is an index in a list or an array.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `min` - the minimal value, inclusive.
        `max` - the maximal value, inclusive.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is not in the given range.
      See Also:
        `ensureSizeBetween(String, int, int, int)`, `ensureValidIndex(int, int)`, `ensureValidIndexRange(int, int, int)`

    - #### ensureBetween

          public static void ensureBetween​(String name,
                                           long min,
                                           long max,
                                           long value)
                                    throws IllegalArgumentException

      Ensures that the given long value is between the given bounds, inclusive.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `min` - the minimal value, inclusive.
        `max` - the maximal value, inclusive.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is not in the given range.

    - #### ensureBetween

          public static void ensureBetween​(String name,
                                           float min,
                                           float max,
                                           float value)
                                    throws IllegalArgumentException

      Ensures that the given floating point value is between the given bounds, inclusive.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `min` - the minimal value, inclusive.
        `max` - the maximal value, inclusive.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is NaN or not in the given range.

    - #### ensureBetween

          public static void ensureBetween​(String name,
                                           double min,
                                           double max,
                                           double value)
                                    throws IllegalArgumentException

      Ensures that the given floating point value is between the given bounds, inclusive.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `min` - the minimal value, inclusive.
        `max` - the maximal value, inclusive.
        `value` - the user argument to check.
      Throws:
        `IllegalArgumentException` - if the given value is NaN or not in the given range.

    - #### ensureSizeBetween

          public static void ensureSizeBetween​(String name,
                                               int min,
                                               int max,
                                               int size)
                                        throws IllegalArgumentException

      Ensures that the given collection size or array length is between the given bounds, inclusive. This method performs the same check than `ensureBetween(…)`, but the error message is different in case of failure.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `min` - the minimal size (inclusive), or 0 if none.
        `max` - the maximal size (inclusive), or `Integer​.MAX_VALUE` if none.
        `size` - the user collection size or array length to be checked.
      Throws:
        `IllegalArgumentException` - if the given value is not in the given range.
      See Also:
        `ensureBetween(String, int, int, int)`, `ensureValidIndexRange(int, int, int)`

    - #### ensureValidUnicodeCodePoint

          public static void ensureValidUnicodeCodePoint​(String name,
                                                         int code)
                                                  throws IllegalArgumentException

      Ensures that the given integer is a valid Unicode code point. The range of valid code points goes from `U+0000` to `U+10FFFF` inclusive.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `code` - the Unicode code point to verify.
      Throws:
        `IllegalArgumentException` - if the given value is not a valid Unicode code point.
      Since:
        0.4

    - #### ensureDimensionMatches

          public static void ensureDimensionMatches​(String name,
                                                    int expected,
                                                    CoordinateReferenceSystem crs)
                                             throws MismatchedDimensionException

      Ensures that the given CRS, if non-null, has the expected number of dimensions. This method does nothing if the given coordinate reference system is null.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `expected` - the expected number of dimensions.
        `crs` - the coordinate reference system to check for its dimension, or `null`.
      Throws:
        `MismatchedDimensionException` - if the given coordinate reference system is non-null and does not have the expected number of dimensions.

    - #### ensureDimensionMatches

          public static void ensureDimensionMatches​(String name,
                                                    int expected,
                                                    CoordinateSystem cs)
                                             throws MismatchedDimensionException

      Ensures that the given coordinate system, if non-null, has the expected number of dimensions. This method does nothing if the given coordinate system is null.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `expected` - the expected number of dimensions.
        `cs` - the coordinate system to check for its dimension, or `null`.
      Throws:
        `MismatchedDimensionException` - if the given coordinate system is non-null and does not have the expected number of dimensions.
      Since:
        0.6

    - #### ensureDimensionMatches

          public static void ensureDimensionMatches​(String name,
                                                    int expected,
                                                    int[] indices)
                                             throws MismatchedDimensionException

      Ensures that the given array of indices, if non-null, has the expected number of dimensions (taken as its length). This method does nothing if the given array is null.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `expected` - the expected number of dimensions.
        `indices` - the array of indices to check for its number of dimensions, or `null`.
      Throws:
        `MismatchedDimensionException` - if the given array of indices is non-null and does not have the expected number of dimensions (taken as its length).
      Since:
        1.0

    - #### ensureDimensionMatches

          public static void ensureDimensionMatches​(String name,
                                                    int expected,
                                                    double[] vector)
                                             throws MismatchedDimensionException

      Ensures that the given vector, if non-null, has the expected number of dimensions (taken as its length). This method does nothing if the given vector is null.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `expected` - the expected number of dimensions.
        `vector` - the vector to check for its number of dimensions, or `null`.
      Throws:
        `MismatchedDimensionException` - if the given vector is non-null and does not have the expected number of dimensions (taken as its length).

    - #### ensureDimensionMatches

          public static void ensureDimensionMatches​(String name,
                                                    int expected,
                                                    DirectPosition position)
                                             throws MismatchedDimensionException

      Ensures that the given direct position, if non-null, has the expected number of dimensions. This method does nothing if the given direct position is null.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `expected` - the expected number of dimensions.
        `position` - the direct position to check for its dimension, or `null`.
      Throws:
        `MismatchedDimensionException` - if the given direct position is non-null and does not have the expected number of dimensions.

    - #### ensureDimensionMatches

          public static void ensureDimensionMatches​(String name,
                                                    int expected,
                                                    Envelope envelope)
                                             throws MismatchedDimensionException

      Ensures that the given envelope, if non-null, has the expected number of dimensions. This method does nothing if the given envelope is null.
      Parameters:
        `name` - the name of the argument to be checked. Used only if an exception is thrown.
        `expected` - the expected number of dimensions.
        `envelope` - the envelope to check for its dimension, or `null`.
      Throws:
        `MismatchedDimensionException` - if the given envelope is non-null and does not have the expected number of dimensions.