Module is.codion.framework.domain
Package is.codion.framework.domain.entity.attribute

Interface AttributeDefinition<T>

Type Parameters:
T - the underlying type
All Known Subinterfaces:
AuditColumnDefinition<T>, ColumnDefinition<T>, DerivedAttributeDefinition<T>, ForeignKeyDefinition, TransientAttributeDefinition<T>
public interface AttributeDefinition<T>
Defines an Attribute. Factory for AttributeDefinition instances.

  • Field Details

    • DEFAULT_MAXIMUM_FRACTION_DIGITS

      static final int DEFAULT_MAXIMUM_FRACTION_DIGITS
      The default maximum fraction digits for floating point numbers
      See Also:

    • MAXIMUM_FRACTION_DIGITS

      static final PropertyValue<Integer> MAXIMUM_FRACTION_DIGITS
      Specifies the default maximum number of fraction digits for double property values
      Note that values are rounded when set.
      • Value type: Integer
      • Default value: 10

    • DECIMAL_ROUNDING_MODE

      static final PropertyValue<RoundingMode> DECIMAL_ROUNDING_MODE
      Specifies the default rounding mode used for decimal property values
      See Also:

    • TIME_FORMAT

      static final PropertyValue<String> TIME_FORMAT
      The default date format pattern to use when showing time values in tables and when creating default time input fields
      • Value type: String
      • Default value: HH:mm

    • DATE_TIME_FORMAT

      static final PropertyValue<String> DATE_TIME_FORMAT
      The default date/time format pattern to use when showing date/time values in tables and when creating default date/time input fields
      • Value type: String
      • Default value: dd-MM-yyyy HH:mm [month/day order is locale specific]

    • DATE_FORMAT

      static final PropertyValue<String> DATE_FORMAT
      The default date format pattern to use when showing date values in tables and when creating default date input fields
      • Value type: String
      • Default value: dd-MM-yyyy [month/day order is locale specific]

    • NUMBER_FORMAT_GROUPING

      static final PropertyValue<Boolean> NUMBER_FORMAT_GROUPING
      Specifies whether number format grouping is used by default
      • Value type: Boolean
      • Default value: false

    • GROUPING_SEPARATOR

      static final PropertyValue<Character> GROUPING_SEPARATOR
      Specifies the default number grouping separator
      • Value type: Character
      • Default value: The grouping separator for the default locale

    • DECIMAL_SEPARATOR

      static final PropertyValue<Character> DECIMAL_SEPARATOR
      Specifies the default number decimal separator.
      • Value type: Character
      • Default value: The decimal separator for the default locale

    • USE_LEXICAL_STRING_COMPARATOR

      static final PropertyValue<Boolean> USE_LEXICAL_STRING_COMPARATOR
      Specifies whether String values should use a lexical comparator by default
      • Value type: Boolean
      • Default value: true

  • Method Details

    • attribute

      Attribute<T> attribute()
      The Attribute this definition is based on, should be unique within an Entity. By default, the Attribute.name() serves as column name for database columns.
      Returns:
      the attribute this definition is based on

    • entityType

      EntityType entityType()
      Returns:
      the type of the entity this attribute is associated with

    • caption

      String caption()
      Returns:
      the caption

    • description

      String description()
      Returns:
      a String describing this attribute

    • string

      String string(T value)
      Returns a string representation of the given value formatted with this attributes format. If no format is available Object.toString() is used. By default, null values result in an empty string.
      Parameters:
      value - the value to format.
      Returns:
      the value formatted as a string
      See Also:

    • hasDefaultValue

      boolean hasDefaultValue()
      Returns:
      true if a default value has been set for this attribute

    • defaultValue

      T defaultValue()
      Returns:
      the default value for this attribute, if no default value has been set null is returned
      See Also:

    • hidden

      boolean hidden()
      Returns:
      true if this attribute should be hidden in table views

    • maximumValue

      Number maximumValue()
      Returns:
      the maximum allowed value for this attribute, null if none is defined, only applicable to numerical attributes

    • minimumValue

      Number minimumValue()
      Returns:
      the minimum allowed value for this attribute, null if none is defined, only applicable to numerical attributes

    • maximumFractionDigits

      int maximumFractionDigits()
      Returns:
      the maximum number of fraction digits to use for this attribute value, -1 if this attribute is not based on Types.DOUBLE or Types.DECIMAL
      See Also:

    • decimalRoundingMode

      RoundingMode decimalRoundingMode()
      Returns:
      the rounding mode to use when working with decimal values
      See Also:

    • nullable

      boolean nullable()
      Returns:
      true if null is a valid value for this attribute

    • derived

      boolean derived()
      The value of a derived attribute can not be set, as it's value is derived from other values
      Returns:
      true if the value of this attribute is derived from one or more values

    • maximumLength

      int maximumLength()
      Returns:
      the maximum length of this attribute value, -1 is returned if the maximum length is undefined, this only applies to String (varchar) based attributes

    • mnemonic

      char mnemonic()
      Returns the mnemonic associated with this attribute.
      Returns:
      the mnemonic to use when creating a label for this attribute, 0 meaning no mnemonic

    • format

      Format format()
      Returns the Format used when presenting values for this attribute, null if none has been specified.
      Returns:
      the Format object used to format the value of attributes when being presented

    • dateTimePattern

      String dateTimePattern()
      Returns the date time format pattern used when presenting and inputting values for this attribute.
      Returns:
      the date/time format pattern

    • dateTimeFormatter

      DateTimeFormatter dateTimeFormatter()
      Returns the date time formatter used when presenting and inputting values for this attribute.
      Returns:
      the DateTimeFormatter for this attribute or null if this is not a date/time based attribute

    • comparator

      Comparator<T> comparator()
      Returns:
      the Comparator to use when comparing values associated with this attribute

    • validItem

      boolean validItem(T value)
      Validates the given value against the valid items for this attribute. Always returns true if this is not an item based attribute.
      Parameters:
      value - the value to validate
      Returns:
      true if the given value is a valid item for this attribute
      See Also:

    • items

      List<Item<T>> items()
      Returns the valid items for this attribute or an empty list in case this is not an item based attribute
      Returns:
      an unmodifiable view of the valid items for this attribute

    • definitionComparator

      static Comparator<AttributeDefinition<?>> definitionComparator()
      Returns a new Comparator instance for sorting attribute definition instances by caption, or if that is not available, attribute name, ignoring case
      Returns:
      a new Comparator instance