Module org.apache.sis.feature
Package org.apache.sis.feature

Class FeatureFormat

Object
Format
CompoundFormat<Object>
TabularFormat<Object>
FeatureFormat
All Implemented Interfaces:
Serializable, Cloneable, Localized
public class FeatureFormat extends TabularFormat<Object>
Formats features or feature types in a tabular format. This format assumes a monospaced font and an encoding supporting drawing box characters (e.g. UTF-8).

Example

A feature named “City” and containing 3 properties (“name”, “population” and “twin town”) may be formatted like below. The two first properties are attributes while the last property is an association to another feature. 
   City
   ┌────────────┬─────────┬──────────────┬───────────┐
   │ Name       │ Type    │ Multiplicity │ Value     │
   ├────────────┼─────────┼──────────────┼───────────┤
   │ name       │ String  │ [1 … 1]      │ Paderborn │
   │ population │ Integer │ [1 … 1]      │ 143,174   │
   │ twin town  │ City    │ [0 … ∞]      │ Le Mans   │
   └────────────┴─────────┴──────────────┴───────────┘

Limitations

  • The current implementation can only format features — parsing is not yet implemented.
  • Feature­Format, like most java​.text​.Format subclasses, is not thread-safe.
Since:
0.5
See Also:

  • Constructor Details

    • FeatureFormat

      public FeatureFormat()
      Creates a new formatter for the default locale and timezone.

    • FeatureFormat

      public FeatureFormat(Locale locale, TimeZone timezone)
      Creates a new formatter for the given locale and timezone.
      Parameters:
      locale - the locale, or null for Locale​.ROOT.
      timezone - the timezone, or null for UTC.

  • Method Details

    • getValueType

      public final Class<Object> getValueType()
      Returns the type of objects formatted by this class. This method has to return Object​.class since it is the only common parent to Feature and Feature­Type.
      Specified by:
      get­Value­Type in class Compound­Format<Object>
      Returns:
      Object​.class

    • getLocale

      public Locale getLocale(Locale.Category category)
      Returns the locale for the given category.
      Overrides:
      get­Locale in class Compound­Format<Object>
      Parameters:
      category - the category for which a locale is desired.
      Returns:
      the locale for the given category (never null).

    • getAllowedColumns

      public Set<FeatureFormat.Column> getAllowedColumns()
      Returns all columns that may be shown in the tables to format. The columns included in the set may be shown, but not necessarily; some columns will still be omitted if they are completely empty. However, columns not included in the set are guaranteed to be omitted.
      Returns:
      all columns that may be shown in the tables to format.
      Since:
      0.8

    • setAllowedColumns

      public void setAllowedColumns(Set<FeatureFormat.Column> inclusion)
      Sets all columns that may be shown in the tables to format. Note that the columns specified to this method are not guaranteed to be shown; some columns will still be omitted if they are completely empty.
      Parameters:
      inclusion - all columns that may be shown in the tables to format.
      Since:
      0.8

    • format

      public void format(Object object, Appendable toAppendTo) throws IOException
      Formats the given object to the given stream of buffer. The object may be an instance of any of the following types:
      • Feature
      • Feature­Type
      Specified by:
      format in class Compound­Format<Object>
      Parameters:
      object - the object to format.
      to­Append­To - where to format the object.
      Throws:
      IOException - if an error occurred while writing to the given appendable.

    • parse

      public Object parse(CharSequence text, ParsePosition pos) throws ParseException
      Not yet supported.
      Specified by:
      parse in class Compound­Format<Object>
      Parameters:
      text - the character sequence for the object to parse.
      pos - the position where to start the parsing. On return, the position where the parsing stopped or where an error occurred.
      Returns:
      currently never return.
      Throws:
      Parse­Exception - currently always thrown.

    • clone

      public FeatureFormat clone()
      Returns a clone of this format.
      Overrides:
      clone in class Tabular­Format<Object>
      Returns:
      a clone of this format.