# Class SampleDimension.Builder

Object
Builder

Enclosing class:
  `SampleDimension`

public static class SampleDimension.Builder extends Object
A mutable builder for creating an immutable `SampleDimension`. The following properties can be set:

- An optional name for the `SampleDimension`.
- A single optional category for the background value.
- An arbitrary number of qualitative categories.
- An arbitrary number of quantitative categories.

A qualitative category is a range of sample values associated to a label. For example, 0 = no data, 1 = cloud, 2 = sea, 3 = land, etc. Missing values are also considered as a qualitative category and should be declared. If the missing value can be used as a background value for filling empty spaces in image resampling operations, then it should be declared using `setBackground(…)` method instead of `addQualitative(…)`.

A quantitative category is a range of sample values associated to numbers with units of measurement. For example, 10 = 1.0°C, 11 = 1.1°C, 12 = 1.2°C, etc. A quantitative category has a transfer function (typically a scale factor and an offset) for converting sample values to values expressed in the unit of measurement.

Qualitative and quantitative categories can be mixed in the same `SampleDimension`, provided that their ranges do not overlap. After properties have been set, the sample dimension is created by invoking `build()`.

## Note for subclass implementations

Properties are ultimately set by the following methods:

- `setName(GenericName)`
- `setBackground(CharSequence, Number)`
- `addQualitative(CharSequence, NumberRange)`
- `addQuantitative(CharSequence, NumberRange, MathTransform1D, Unit)`

All other `setName(…)`, `addQualitative(…)` and `addQuantitative(…)` methods are convenience methods delegating to above-cited methods, thus providing single points that subclasses can override.

Since:
  1.0

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `Builder()`
  Creates an initially empty builder for a sample dimension.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `SampleDimension​.Builder`
  `addQualitative(CharSequence name, boolean sample)`
  Adds a qualitative category for samples of the given boolean value.
  `SampleDimension​.Builder`
  `addQualitative(CharSequence name, byte sample)`
  Adds a qualitative category for samples of the given tiny (8 bits) integer value.
  `SampleDimension​.Builder`
  `addQualitative(CharSequence name, double sample)`
  Adds a qualitative category for samples of the given double precision floating-point value.
  `SampleDimension​.Builder`
  `addQualitative(CharSequence name, float sample)`
  Adds a qualitative category for samples of the given floating-point value.
  `SampleDimension​.Builder`
  `addQualitative(CharSequence name, int sample)`
  Adds a qualitative category for samples of the given integer value.
  `SampleDimension​.Builder`
  `addQualitative(CharSequence name, short sample)`
  Adds a qualitative category for samples of the given short (16 bits) integer value.
  `SampleDimension​.Builder`
  `addQualitative(CharSequence name, Number minimum, Number maximum)`
  Adds a qualitative category for samples in the given range of values.
  `SampleDimension​.Builder`
  `addQualitative(CharSequence name, NumberRange<?> samples)`
  Adds a qualitative category for all samples in the specified range of values.
  `SampleDimension​.Builder`
  `addQuantitative(CharSequence name, double minimum, double maximum, Unit<?> units)`
  Adds a quantitative category for values ranging from `minimum` to `maximum` inclusive in the given units of measurement.
  `SampleDimension​.Builder`
  `addQuantitative(CharSequence name, float minimum, float maximum, Unit<?> units)`
  Adds a quantitative category for values ranging from `minimum` to `maximum` inclusive in the given units of measurement.
  `SampleDimension​.Builder`
  `addQuantitative(CharSequence name, int lower, int upper, double scale, double offset, Unit<?> units)`
  Adds a quantitative category for sample values ranging from `lower` inclusive to `upper` exclusive.
  `SampleDimension​.Builder`
  `addQuantitative(CharSequence name, NumberRange<?> samples, NumberRange<?> converted)`
  Constructs a quantitative category mapping samples to real values in the specified range.
  `SampleDimension​.Builder`
  `addQuantitative(CharSequence name, NumberRange<?> samples, MathTransform1D toUnits, Unit<?> units)`
  Constructs a quantitative category for all samples in the specified range of values.
  `SampleDimension`
  `build()`
  Creates a new sample with the properties defined to this builder.
  `List<Category>`
  `categories()`
  Returns the list of categories added so far.
  `void`
  `clear()`
  Reset this builder to the same state as after construction.
  `Number`
  `getBackground()`
  Returns the value specified by the last call to a `setBackground(…)` method.
  `GenericName`
  `getName()`
  Returns the name specified by the last call to a `setName(…)` method.
  `SampleDimension​.Builder`
  `mapQualitative(CharSequence name, Number sample, float converted)`
  Adds a qualitative category for the given sample value mapped to the specified converted NaN value.
  `SampleDimension​.Builder`
  `mapQualitative(CharSequence name, NumberRange<?> samples, float converted)`
  Adds a qualitative category for the given samples values mapped to the specified converted NaN value.
  `SampleDimension​.Builder`
  `setBackground(CharSequence name, Number sample)`
  Adds a qualitative category and marks that category as the background value.
  `SampleDimension​.Builder`
  `setBackground(Number sample)`
  Sets the background value without creating a category (typically for RGB images).
  `SampleDimension​.Builder`
  `setName(int band)`
  Sets an identification of the sample dimension as a band number.
  `SampleDimension​.Builder`
  `setName(CharSequence name)`
  Sets an identification of the sample dimension as a character sequence.
  `SampleDimension​.Builder`
  `setName(GenericName name)`
  Sets an identification of the sample dimension.

  ### Methods inherited from class Object

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

- ## Constructor Details

  - ### Builder

    public Builder()
    Creates an initially empty builder for a sample dimension. Callers shall invoke at least one `addFoo(…)` method before `build()`.

- ## Method Details

  - ### getName

    public GenericName getName()
    Returns the name specified by the last call to a `setName(…)` method. If `setName(…)` has not been invoked or if `clear()` has been invoked after, then this method returns `null`. In that case the `build()` method will default to the name of the first quantitative category if present, or "Untitled" (localized) otherwise.
    Returns:
      the name explicitly set by last call to `setName(…)`, or `null` if none or cleared.
    Since:
      1.2
    See Also:
      - `SampleDimension​.getName()`

  - ### setName

    public SampleDimension.Builder setName(GenericName name)
    Sets an identification of the sample dimension. This is the value to be returned by `SampleDimension​.getName()`. If this method is invoked more than once, then the last specified name prevails (previous sample dimension names are discarded).
    Parameters:
      `name` - identification of the sample dimension.
    Returns:
      `this`, for method call chaining.

  - ### setName

    public SampleDimension.Builder setName(CharSequence name)
    Sets an identification of the sample dimension as a character sequence. This is a convenience method for creating a `GenericName` from the given characters.

    #### Default implementation

    This convenience method delegates to `setName(GenericName)`.
    Parameters:
      `name` - identification of the sample dimension.
    Returns:
      `this`, for method call chaining.

  - ### setName

    public SampleDimension.Builder setName(int band)
    Sets an identification of the sample dimension as a band number. This method should be used only when no more descriptive name is available.

    #### Default implementation

    This convenience method delegates to `setName(GenericName)`.
    Parameters:
      `band` - sequence identifier of the sample dimension to create.
    Returns:
      `this`, for method call chaining.

  - ### getBackground

    public Number getBackground()
    Returns the value specified by the last call to a `setBackground(…)` method. If `setBackground(…)` has not been invoked or if `clear()` has been invoked after, then this method returns `null`.
    Returns:
      the value set by last call to `setBackground(…)`, or `null` if none or cleared.
    Since:
      1.2
    See Also:
      - `SampleDimension​.getBackground()`

  - ### setBackground

    public SampleDimension.Builder setBackground(Number sample)
    Sets the background value without creating a category (typically for RGB images). An image without category is interpreted as an image for visualization purposes only, without values that we can associate to a unit of measurement or a qualitative meaning. This `setBackground(Number)` method can be invoked when the caller nevertheless wants to declare a background value used for filling empty spaces (e.g. in image corners).
    Parameters:
      `sample` - the background value, or `null` if none.
    Returns:
      `this`, for method call chaining.
    Since:
      1.2

  - ### setBackground

    public SampleDimension.Builder setBackground(CharSequence name, Number sample)
    Adds a qualitative category and marks that category as the background value. This is the value to be returned by `SampleDimension​.getBackground()`. If this method is invoked more than once, then the last specified value prevails (previous values become ordinary qualitative categories).
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "fill value" (localized) name.
      `sample` - the background value.
    Returns:
      `this`, for method call chaining.

  - ### addQualitative

    public SampleDimension.Builder addQualitative(CharSequence name, boolean sample)
    Adds a qualitative category for samples of the given boolean value. The `true` value is represented by 1 and the `false` value is represented by 0.

    #### Usage note

    The `setBackground(CharSequence, Number)` method should be used instead of this method when the aim is to define a default "no data" category to use when the missing value cannot be categorized more precisely (cloud, instrument error, etc).

    #### Default implementation

    This convenience method delegates to `addQualitative(CharSequence, NumberRange)`.
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "no data" name.
      `sample` - the sample value as a boolean.
    Returns:
      `this`, for method call chaining.

  - ### addQualitative

    public SampleDimension.Builder addQualitative(CharSequence name, byte sample)
    Adds a qualitative category for samples of the given tiny (8 bits) integer value. The argument is treated as a signed integer (0x80 to 0x7f).

    #### Usage note

    The `setBackground(CharSequence, Number)` method should be used instead of this method when the aim is to define a default "no data" category to use when the missing value cannot be categorized more precisely (cloud, instrument error, etc).

    #### Default implementation

    This convenience method delegates to `addQualitative(CharSequence, NumberRange)`.
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "no data" name.
      `sample` - the sample value as an integer.
    Returns:
      `this`, for method call chaining.

  - ### addQualitative

    public SampleDimension.Builder addQualitative(CharSequence name, short sample)
    Adds a qualitative category for samples of the given short (16 bits) integer value. The argument is treated as a signed integer (-32768 to 32767).

    #### Usage note

    The `setBackground(CharSequence, Number)` method should be used instead of this method when the aim is to define a default "no data" category to use when the missing value cannot be categorized more precisely (cloud, instrument error, etc).

    #### Default implementation

    This convenience method delegates to `addQualitative(CharSequence, NumberRange)`.
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "no data" name.
      `sample` - the sample value as an integer.
    Returns:
      `this`, for method call chaining.

  - ### addQualitative

    public SampleDimension.Builder addQualitative(CharSequence name, int sample)
    Adds a qualitative category for samples of the given integer value. The argument is treated as a signed integer (-2147483648 to 2147483647).

    #### Usage note

    The `setBackground(CharSequence, Number)` method should be used instead of this method when the aim is to define a default "no data" category to use when the missing value cannot be categorized more precisely (cloud, instrument error, etc).

    #### Default implementation

    This convenience method delegates to `addQualitative(CharSequence, NumberRange)`.
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "no data" name.
      `sample` - the sample value as an integer.
    Returns:
      `this`, for method call chaining.

  - ### addQualitative

    public SampleDimension.Builder addQualitative(CharSequence name, float sample)
    Adds a qualitative category for samples of the given floating-point value.

    #### Usage note

    The `setBackground(CharSequence, Number)` method should be used instead of this method when the aim is to define a default "no data" category to use when the missing value cannot be categorized more precisely (cloud, instrument error, etc).

    #### Default implementation

    This convenience method delegates to `addQualitative(CharSequence, NumberRange)`.
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "no data" name.
      `sample` - the sample value as a real number or a NaN value.
    Returns:
      `this`, for method call chaining.

  - ### addQualitative

    public SampleDimension.Builder addQualitative(CharSequence name, double sample)
    Adds a qualitative category for samples of the given double precision floating-point value.

    #### Usage note

    The `setBackground(CharSequence, Number)` method should be used instead of this method when the aim is to define a default "no data" category to use when the missing value cannot be categorized more precisely (cloud, instrument error, etc).

    #### Default implementation

    This convenience method delegates to `addQualitative(CharSequence, NumberRange)`.
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "no data" name.
      `sample` - the sample value as a real number or a NaN value.
    Returns:
      `this`, for method call chaining.

  - ### addQualitative

    public SampleDimension.Builder addQualitative(CharSequence name, Number minimum, Number maximum)
    Adds a qualitative category for samples in the given range of values.

    #### Usage note

    The `setBackground(CharSequence, Number)` method should be used instead of this method when the aim is to define a default "no data" category to use when the missing value cannot be categorized more precisely (cloud, instrument error, etc).

    #### Default implementation

    This convenience method delegates to `addQualitative(CharSequence, NumberRange)`.
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "no data" name.
      `minimum` - the minimum sample value, inclusive.
      `maximum` - the maximum sample value, inclusive.
    Returns:
      `this`, for method call chaining.
    Throws:
      `IllegalArgumentException` - if the range is empty.

  - ### addQualitative

    public SampleDimension.Builder addQualitative(CharSequence name, NumberRange<?> samples)
    Adds a qualitative category for all samples in the specified range of values. This is the most generic method for adding a qualitative category. All other `addQualitative(name, …)` methods are convenience methods delegating their work to this method.

    #### Usage note

    The `setBackground(CharSequence, Number)` method should be used instead of this method when the aim is to define a default "no data" category to use when the missing value cannot be categorized more precisely (cloud, instrument error, etc).
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "no data" name.
      `samples` - the minimum and maximum sample values in the category.
    Returns:
      `this`, for method call chaining.
    Throws:
      `IllegalArgumentException` - if the given range is empty.

  - ### mapQualitative

    public SampleDimension.Builder mapQualitative(CharSequence name, Number sample, float converted)
    Adds a qualitative category for the given sample value mapped to the specified converted NaN value. The given `converted` value must be a NaN value (not necessarily the `Float​.NaN` canonical value) and that value shall not have been used by another category.

    #### Default implementation

    This convenience method delegates to `mapQualitative(CharSequence, NumberRange, float)`.
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "no data" name.
      `sample` - the sample value as a real or integer number.
      `converted` - the converted value to map to the given sample value. `Float​.isNaN(converted)` must be `true`.
    Returns:
      `this`, for method call chaining.
    Throws:
      `IllegalArgumentException` - if `converted` is not a NaN value.
    Since:
      1.1
    See Also:
      - `MathFunctions​.toNanFloat(int)`

  - ### mapQualitative

    public SampleDimension.Builder mapQualitative(CharSequence name, NumberRange<?> samples, float converted)
    Adds a qualitative category for the given samples values mapped to the specified converted NaN value. The given `converted` value must be a NaN value (not necessarily the `Float​.NaN` canonical value) and that value shall not have been used by another category.

    The `addQualitative(…)` methods select automatically a converted value. The `mapQualitative(…)` methods are for the less common case where caller needs to control which converted NaN value is mapped to the samples values.

    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "no data" name.
      `samples` - the minimum and maximum sample values in the category.
      `converted` - the converted value to map to the given sample values. `Float​.isNaN(converted)` must be `true`.
    Returns:
      `this`, for method call chaining.
    Throws:
      `IllegalArgumentException` - if `converted` is not a NaN value.
    Since:
      1.1
    See Also:
      - `MathFunctions​.toNanFloat(int)`

  - ### addQuantitative

    public SampleDimension.Builder addQuantitative(CharSequence name, NumberRange<?> samples, NumberRange<?> converted)
    Constructs a quantitative category mapping samples to real values in the specified range. Sample values in the `samples` range will be mapped to real values in the `converted` range through a linear equation of the form:

    > measure = sample × scale + offset

    where scale and offset coefficients are computed from the ranges supplied in arguments. The units of measurement will be taken from the `converted` range if it is an instance of `MeasurementRange`.

    Warning: this method is provided for convenience when the scale and offset factors are not explicitly specified. If those factor are available, then the other `addQuantitative(name, samples, …)` methods are more reliable.

    #### Default implementation

    This convenience method delegates to `addQuantitative(CharSequence, NumberRange, MathTransform1D, Unit)`.
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "data" name.
      `samples` - the minimum and maximum sample values in the category. Element class is usually `Integer`, but `Float` and `Double` values are accepted as well.
      `converted` - the range of real values for this category, as an instance of `MeasurementRange` if those values are associated to an unit of measurement.
    Returns:
      `this`, for method call chaining.
    Throws:
      `ClassCastException` - if the range element class is not a `Number` subclass.
      `IllegalArgumentException` - if the range is invalid.

  - ### addQuantitative

    public SampleDimension.Builder addQuantitative(CharSequence name, float minimum, float maximum, Unit<?> units)
    Adds a quantitative category for values ranging from `minimum` to `maximum` inclusive in the given units of measurement. The transfer function is set to identity.

    #### Default implementation

    This convenience method delegates to `addQuantitative(CharSequence, NumberRange, MathTransform1D, Unit)`.
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "data" name.
      `minimum` - the minimum value (inclusive) in the given units.
      `maximum` - the maximum value (inclusive) in the given units.
      `units` - the units of measurement, or `null` if unknown or not applicable.
    Returns:
      `this`, for method call chaining.
    Throws:
      `IllegalArgumentException` - if a value is NaN or if `minimum` is greater than `maximum`.

  - ### addQuantitative

    public SampleDimension.Builder addQuantitative(CharSequence name, double minimum, double maximum, Unit<?> units)
    Adds a quantitative category for values ranging from `minimum` to `maximum` inclusive in the given units of measurement. The transfer function is set to identity.

    #### Default implementation

    This convenience method delegates to `addQuantitative(CharSequence, NumberRange, MathTransform1D, Unit)`.
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "data" name.
      `minimum` - the minimum value (inclusive) in the given units.
      `maximum` - the maximum value (inclusive) in the given units.
      `units` - the units of measurement, or `null` if unknown or not applicable.
    Returns:
      `this`, for method call chaining.
    Throws:
      `IllegalArgumentException` - if a value is NaN or if `minimum` is greater than `maximum`.

  - ### addQuantitative

    public SampleDimension.Builder addQuantitative(CharSequence name, int lower, int upper, double scale, double offset, Unit<?> units)
    Adds a quantitative category for sample values ranging from `lower` inclusive to `upper` exclusive. Sample values are converted into real values using the following linear equation:

    > measure = sample × scale + offset

    Results of above conversion are measurements in the units specified by the `units` argument.

    #### Default implementation

    This convenience method delegates to `addQuantitative(CharSequence, NumberRange, MathTransform1D, Unit)`.
    Parameters:
      `name` - the category name as a `String` or `InternationalString` object. or `null` for a default "data" name.
      `lower` - the lower sample value, inclusive.
      `upper` - the upper sample value, exclusive.
      `scale` - the scale value which is multiplied to sample values for the category. Must be different than zero.
      `offset` - the offset value to add to sample values for this category.
      `units` - the units of measurement of values after conversion by the scale factor and offset, or `null` if unknown or not applicable.
    Returns:
      `this`, for method call chaining.
    Throws:
      `IllegalArgumentException` - if `lower` is not smaller than `upper`, or if `scale` or `offset` are not real numbers, or if `scale` is zero.

  - ### addQuantitative

    public SampleDimension.Builder addQuantitative(CharSequence name, NumberRange<?> samples, MathTransform1D toUnits, Unit<?> units)
    Constructs a quantitative category for all samples in the specified range of values. Sample values (usually integers) will be converted into real values (usually floating-point numbers) through the `toUnits` transform. Results of that conversion are measurements in the units specified by the `units` argument.

    This is the most generic method for adding a quantitative category. All other `addQuantitative(name, …)` methods are convenience methods delegating their work to this method.

    Parameters:
      `name` - the category name as a `String` or `InternationalString` object, or `null` for a default "data" name.
      `samples` - the minimum and maximum sample values in the category. Element class is usually `Integer`, but `Float` and `Double` types are accepted as well.
      `toUnits` - the transfer function from sample values to real values in the specified units, or `null` if none.
      `units` - the units of measurement of values after conversion by the transfer function, or `null` if unknown or not applicable.
    Returns:
      `this`, for method call chaining.
    Throws:
      `ClassCastException` - if the range element class is not a `Number` subclass.
      `IllegalArgumentException` - if the range is invalid.
    See Also:
      - `TransferFunction`

  - ### categories

    public List<Category> categories()
    Returns the list of categories added so far. The returned list does not support the `add` operation, but supports the `remove` operation.
    Returns:
      the current category list, read-only except for the `remove` operation.

  - ### build

    public SampleDimension build()
    Creates a new sample with the properties defined to this builder.
    Returns:
      the sample dimension.
    Throws:
      `IllegalSampleDimensionException` - if there is overlapping ranges of sample values or other problems that prevent the construction of sample dimensions.

  - ### clear

    public void clear()
    Reset this builder to the same state as after construction. The sample dimension name, background values and all categories are discarded. This method can be invoked when the same builder is reused for creating more than one sample dimension.