# Class DefaultObjective

Object
AbstractMetadata
ModifiableMetadata
ISOMetadata
DefaultObjective

All Implemented Interfaces:
  `Serializable`, `Emptiable`, `LenientComparable`, `IdentifiedObject`, `Objective`

public class DefaultObjective extends ISOMetadata implements Objective
Describes the characteristics, spatial and temporal extent of the intended object to be observed. The following properties are mandatory in a well-formed metadata according ISO 19115:
`MI_Objective` `├─identifier…………………………` Code used to identify the objective. `│ └─code………………………………` Alphanumeric value identifying an instance in the namespace. `└─objectiveOccurrence…` Event or events associated with objective completion. `├─identifier………………` Event name or number. `│ └─code……………………` Alphanumeric value identifying an instance in the namespace. `├─trigger………………………` Initiator of the event. `├─context………………………` Meaning of the event. `├─sequence……………………` Relative time ordering of the event. `└─time………………………………` Time the event occurred.

## Limitations

- Instances of this class are not synchronized for multi-threading. Synchronization, if needed, is caller's responsibility.
- Serialized objects of this class are not guaranteed to be compatible with future Apache SIS releases. Serialization support is appropriate for short term storage or RMI between applications running the same version of Apache SIS. For long term storage, use `XML` instead.

Since:
  0.3
See Also:
  - Serialized Form

- ## Nested Class Summary

  ### Nested classes/interfaces inherited from class ModifiableMetadata

  `ModifiableMetadata​.State`

- ## Field Summary

  ### Fields inherited from class ISOMetadata

  `identifiers`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `DefaultObjective()`
  Constructs an initially empty objective.
  `DefaultObjective(Objective object)`
  Constructs a new instance initialized with the values from the specified metadata object.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `static DefaultObjective`
  `castOrCopy(Objective object)`
  Returns a SIS metadata implementation with the values of the given arbitrary implementation.
  `Collection<Extent>`
  `getExtents()`
  Returns the extent information including the bounding box, bounding polygon, vertical and temporal extent of the objective.
  `Collection<InternationalString>`
  `getFunctions()`
  Returns the role or purpose performed by or activity performed at the objective.
  `Collection<Identifier>`
  `getIdentifiers()`
  Returns the code used to identify the objective.
  `Collection<Event>`
  `getObjectiveOccurences()`
  Returns the event or events associated with objective completion.
  `Collection<PlatformPass>`
  `getPass()`
  Returns the pass of the platform over the objective.
  `InternationalString`
  `getPriority()`
  Returns the priority applied to the target.
  `Collection<Instrument>`
  `getSensingInstruments()`
  Returns the instrument which senses the objective data.
  `Collection<ObjectiveType>`
  `getTypes()`
  Returns the collection technique for the objective.
  `void`
  `setExtents(Collection<? extends Extent> newValues)`
  Sets the extent information including the bounding box, bounding polygon, vertical and temporal extent of the objective.
  `void`
  `setFunctions(Collection<? extends InternationalString> newValues)`
  Sets the role or purpose performed by or activity performed at the objective.
  `void`
  `setIdentifiers(Collection<? extends Identifier> newValues)`
  Sets the code used to identify the objective.
  `void`
  `setObjectiveOccurences(Collection<? extends Event> newValues)`
  Sets the event or events associated with objective completion.
  `void`
  `setPass(Collection<? extends PlatformPass> newValues)`
  Sets the pass of the platform over the objective.
  `void`
  `setPriority(InternationalString newValue)`
  Sets the priority applied to the target.
  `void`
  `setSensingInstruments(Collection<? extends Instrument> newValues)`
  Sets the instrument which senses the objective data.
  `void`
  `setTypes(Collection<? extends ObjectiveType> newValues)`
  Sets the collection technique for the objective.

  ### Methods inherited from class ISOMetadata

  `getIdentifier, getIdentifierMap, getStandard, setIdentifier`

  ### Methods inherited from class ModifiableMetadata

  `checkWritePermission, collectionType, copyCollection, copyList, copyMap, copySet, deepCopy, nonNullCollection, nonNullList, nonNullMap, nonNullSet, singleton, state, writeCollection, writeList, writeMap, writeSet`

  ### Methods inherited from class AbstractMetadata

  `asMap, asTreeTable, clone, equals, equals, getInterface, hashCode, isEmpty, nilReasons, prune, toString`

  ### Methods inherited from class Object

  `finalize, getClass, notify, notifyAll, wait, wait, wait`

- ## Constructor Details

  - ### DefaultObjective

    public DefaultObjective()
    Constructs an initially empty objective.

  - ### DefaultObjective

    public DefaultObjective(Objective object)
    Constructs a new instance initialized with the values from the specified metadata object. This is a shallow copy constructor, because the other metadata contained in the given object are not recursively copied.
    Parameters:
      `object` - the metadata to copy values from, or `null` if none.
    See Also:
      - `castOrCopy(Objective)`

- ## Method Details

  - ### castOrCopy

    public static DefaultObjective castOrCopy(Objective object)
    Returns a SIS metadata implementation with the values of the given arbitrary implementation. This method performs the first applicable action in the following choices:
    - If the given object is `null`, then this method returns `null`.
    - Otherwise if the given object is already an instance of `DefaultObjective`, then it is returned unchanged.
    - Otherwise a new `DefaultObjective` instance is created using the copy constructor and returned. Note that this is a shallow copy operation, because the other metadata contained in the given object are not recursively copied.
    Parameters:
      `object` - the object to get as a SIS implementation, or `null` if none.
    Returns:
      a SIS implementation containing the values of the given object (may be the given object itself), or `null` if the argument was null.

  - ### getIdentifiers

    public Collection<Identifier> getIdentifiers()
    Returns the code used to identify the objective.

    #### Unified identifiers view

    In this SIS implementation, the collection returned by this method includes the XML identifiers (ID, UUID, etc.), thus providing a unified view of every kind of identifiers associated to this objective.

    #### XML marshalling note

    The `<mac:identifier>` element marshalled to XML will exclude all the above cited identifiers, for compliance with ISO 19115 model. Those identifiers will appear in other XML elements or attributes.
    Specified by:
      `getIdentifiers` in interface `IdentifiedObject`
    Specified by:
      `getIdentifiers` in interface `Objective`
    Overrides:
      `getIdentifiers` in class `ISOMetadata`
    Returns:
      identification of the objective.
    See Also:
      - `DefaultCitation​.getIdentifiers()`
      - `getIdentifiers()`
      - `AbstractIdentifiedObject​.getIdentifiers()`

  - ### setIdentifiers

    public void setIdentifiers(Collection<? extends Identifier> newValues)
    Sets the code used to identify the objective.

    XML identifiers (ID, UUID, etc.), are not affected by this method, unless they are explicitly provided in the given collection.

    Parameters:
      `newValues` - the new identifiers values.

  - ### getPriority

    public InternationalString getPriority()
    Returns the priority applied to the target. `null` if unspecified.
    Specified by:
      `getPriority` in interface `Objective`
    Returns:
      priority applied, or `null`.

  - ### setPriority

    public void setPriority(InternationalString newValue)
    Sets the priority applied to the target.
    Parameters:
      `newValue` - the new priority value.

  - ### getTypes

    public Collection<ObjectiveType> getTypes()
    Returns the collection technique for the objective.
    Specified by:
      `getTypes` in interface `Objective`
    Returns:
      collection technique for the objective.

  - ### setTypes

    public void setTypes(Collection<? extends ObjectiveType> newValues)
    Sets the collection technique for the objective.
    Parameters:
      `newValues` - the new types values.

  - ### getFunctions

    public Collection<InternationalString> getFunctions()
    Returns the role or purpose performed by or activity performed at the objective.
    Specified by:
      `getFunctions` in interface `Objective`
    Returns:
      role or purpose performed by or activity performed at the objective.

  - ### setFunctions

    public void setFunctions(Collection<? extends InternationalString> newValues)
    Sets the role or purpose performed by or activity performed at the objective.
    Parameters:
      `newValues` - the new functions values.

  - ### getExtents

    public Collection<Extent> getExtents()
    Returns the extent information including the bounding box, bounding polygon, vertical and temporal extent of the objective.
    Specified by:
      `getExtents` in interface `Objective`
    Returns:
      extent information.

  - ### setExtents

    public void setExtents(Collection<? extends Extent> newValues)
    Sets the extent information including the bounding box, bounding polygon, vertical and temporal extent of the objective.
    Parameters:
      `newValues` - the new extents values.

  - ### getObjectiveOccurences

    public Collection<Event> getObjectiveOccurences()
    Returns the event or events associated with objective completion.
    Upcoming API change
    This method is misspelled (missing "r"). Its name may be fixed in GeoAPI 4.0.
    Specified by:
      `getObjectiveOccurences` in interface `Objective`
    Returns:
      events associated with objective completion.

  - ### setObjectiveOccurences

    public void setObjectiveOccurences(Collection<? extends Event> newValues)
    Sets the event or events associated with objective completion.
    Upcoming API change
    This method is misspelled (missing "r"). Its name may be fixed in GeoAPI 4.0.
    Parameters:
      `newValues` - the new objective occurrences values.

  - ### getPass

    public Collection<PlatformPass> getPass()
    Returns the pass of the platform over the objective.
    Specified by:
      `getPass` in interface `Objective`
    Returns:
      pass of the platform.

  - ### setPass

    public void setPass(Collection<? extends PlatformPass> newValues)
    Sets the pass of the platform over the objective.
    Parameters:
      `newValues` - the new pass values.

  - ### getSensingInstruments

    public Collection<Instrument> getSensingInstruments()
    Returns the instrument which senses the objective data.
    Specified by:
      `getSensingInstruments` in interface `Objective`
    Returns:
      instrument which senses the objective data.

  - ### setSensingInstruments

    public void setSensingInstruments(Collection<? extends Instrument> newValues)
    Sets the instrument which senses the objective data.
    Parameters:
      `newValues` - the new sensing instruments values.