Package org.apache.sis.metadata.iso.maintenance

package org.apache.sis.metadata.iso.maintenance
Information about the frequency and scope of data updates. An explanation for this package is provided in the OpenGIS® javadoc. The remaining discussion on this page is specific to the SIS implementation.


For a global overview of metadata in SIS, see the org​.apache​.sis​.metadata package javadoc.
Package overview
Class hierarchy Aggregation hierarchy
ISO 19115 metadata
 ├─ Maintenance information
 ├─ Scope
 └─ Scope description
Code list
 ├─ Maintenance frequency
 └─ Scope code
Maintenance information
 ├─ Maintenance frequency «code list»
 └─ Scope
     ├─ Scope code «code list»
     └─ Scope description

Null values, nil objects and collections

All constructors and setter methods accept null arguments. A null argument value means that the metadata element cannot be provided, and the reason for that is unspecified. Alternatively, users can specify why a metadata element is missing by providing a value created by Nil­Reason​.create­Nil­Object(Class).

Unless otherwise noted in the Javadoc, all getter methods may return an empty collection, an empty array or null if the type is neither a collection or an array. Note that non-null values may be Nil­Objects.

Unless the metadata object has been marked as unmodifiable and unless otherwise noted in the Javadoc, all collections returned by getter methods are live: adding new elements in the collection modify directly the underlying metadata object. Noticeable exceptions to this rule are union structures, for which only one property can be non-empty in the same object.