Module org.apache.sis.feature

Package org.apache.sis.feature.builder

package org.apache.sis.feature.builder

Helper classes for creating Feature­Type instances. Usage of this package is not mandatory, but make easier to create Default­Feature­Type instances together with their attributes and associations.

The starting point is Feature­Type­Builder. The following example creates a feature type for a capital, as a special kind of city, named "Utopia" by default:

FeatureTypeBuilder builder;

// Create a feature type for a city, which contains a name and a population.
builder = new FeatureTypeBuilder() .setName("City");
builder.addAttribute(String.class) .setName("name").setDefaultValue("Utopia");
builder.addAttribute(Integer.class).setName("population");
FeatureType city = builder.build();

// Create a subclass for a city which is also a capital.
builder = new FeatureTypeBuilder().setName("Capital").setSuperTypes(city);
builder.addAttribute(String.class).setName("parliament");
FeatureType capital = builder.build();

A call to System.out.println(capital) prints the following table:

   Capital ⇾ City
   ┌────────────┬─────────┬──────────────┬───────────────┐
   │ Name       │ Type    │ Multiplicity │ Default value │
   ├────────────┼─────────┼──────────────┼───────────────┤
   │ name       │ String  │   [1 … 1]    │ Utopia        │
   │ population │ Integer │   [1 … 1]    │               │
   │ parliament │ String  │   [1 … 1]    │               │
   └────────────┴─────────┴──────────────┴───────────────┘

Since:

0.8

See Also:

• Default­Feature­Type

Related Packages

Package	Description
org.apache.sis.feature	Defines the structure and content of views of real-world phenomenon.

Class	Description
AssociationRoleBuilder	Describes one association from the Feature­Type to be built by an Feature­Type­Builder to another Feature­Type.
AttributeRole	Roles that can be associated to some attributes for instructing Feature­Type­Builder how to generate predefined operations.
AttributeTypeBuilder<V>	Describes one Attribute­Type which will be part of the feature type to be built by a Feature­Type­Builder.
CharacteristicTypeBuilder<V>	Describes one characteristic of the Attribute­Type will will be built by a Feature­Type­Builder.
FeatureTypeBuilder	Helper class for the creation of Feature­Type instances.
PropertyTypeBuilder	Describes one property of the Feature­Type to be built by an Feature­Type­Builder.
TypeBuilder	Information common to all kind of types (feature, association, characteristics).