Package org.openstreetmap.josm.command

Class Command

java.lang.Object

org.openstreetmap.josm.command.Command

All Implemented Interfaces:

PseudoCommand

Direct Known Subclasses:

AbstractNodesCommand, AddCommand, AddPrimitivesCommand, ChangeCommand, ChangeMembersCommand, ChangePropertyCommand, ChangePropertyKeyCommand, ChangeRelationMemberRoleCommand, ConflictAddCommand, ConflictResolveCommand, DeleteCommand, MoveCommand, PurgeCommand, SelectCommand, SequenceCommand, TransformNodesCommand

public abstract class Command
extends java.lang.Object
implements PseudoCommand

Classes implementing Command modify a dataset in a specific way. A command is one atomic action on a specific dataset, such as move or delete. The command remembers the DataSet it is operating on.

Since:

21 (creation), 10599 (signature)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	Command.CloneVisitor
static class	Command.OldNodeState	Small helper for holding the interesting part of the old data state of the objects.

Field Summary

Fields

Modifier and Type	Field	Description
private java.util.Map<OsmPrimitive,PrimitiveData>	cloneMap	the map of OsmPrimitives in the original state to OsmPrimitives in cloned state
private DataSet	data	the dataset which this command is applied to
static int	IS_INCOMPLETE	IS_INCOMPLETE: operation on incomplete target
static int	IS_OK	IS_OK : operation is okay
static int	IS_OUTSIDE	IS_OUTSIDE : operation on element outside of download area

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Command(DataSet data)	Creates a new command in the context of a specific data set, without data layer

Method Summary

Modifier and Type	Method	Description
static int	checkOutlyingOrIncompleteOperation(java.util.Collection<? extends OsmPrimitive> primitives, java.util.Collection<? extends OsmPrimitive> ignore)	Check whether user is about to operate on data outside of the download area.
protected void	ensurePrimitivesAreInDataset()	Ensures that all primitives that are participating in this command belong to the affected data set.
boolean	equals(java.lang.Object obj)
boolean	executeCommand()	Executes the command on the dataset.
abstract void	fillModifiedData(java.util.Collection<OsmPrimitive> modified, java.util.Collection<OsmPrimitive> deleted, java.util.Collection<OsmPrimitive> added)	Fill in the changed data this command operates on.
DataSet	getAffectedDataSet()	Gets the data set this command affects.
PrimitiveData	getOrig(OsmPrimitive osm)	Lets other commands access the original version of the object.
java.util.Collection<? extends OsmPrimitive>	getParticipatingPrimitives()	Return the primitives that take part in this command.
int	hashCode()
void	undoCommand()	Undoes the command.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.openstreetmap.josm.command.PseudoCommand

getChildren, getDescriptionIcon, getDescriptionText

Field Detail

IS_OK

public static final int IS_OK

IS_OK : operation is okay

See Also:

Constant Field Values

IS_OUTSIDE

public static final int IS_OUTSIDE

IS_OUTSIDE : operation on element outside of download area

See Also:

Constant Field Values

IS_INCOMPLETE

public static final int IS_INCOMPLETE

IS_INCOMPLETE: operation on incomplete target

See Also:

Constant Field Values

cloneMap

private java.util.Map<OsmPrimitive,PrimitiveData> cloneMap

the map of OsmPrimitives in the original state to OsmPrimitives in cloned state

data

private final DataSet data

the dataset which this command is applied to

Constructor Detail

Command

protected Command(DataSet data)

Creates a new command in the context of a specific data set, without data layer

Parameters:

data - the data set. Must not be null.

Throws:

java.lang.IllegalArgumentException - if data is null

Since:

11240

Method Detail

executeCommand

public boolean executeCommand()

Executes the command on the dataset. This implementation will remember all primitives returned by fillModifiedData for restoring them on undo.

The layer should be invalidated after execution so that it can be re-painted.

Returns:

true

undoCommand

public void undoCommand()

Undoes the command. It can be assumed that all objects are in the same state they were before. It can also be assumed that executeCommand was called exactly once before. This implementation undoes all objects stored by a former call to executeCommand.

getOrig

public PrimitiveData getOrig(OsmPrimitive osm)

Lets other commands access the original version of the object. Usually for undoing.

Parameters:

osm - The requested OSM object

Returns:

The original version of the requested object, if any

getAffectedDataSet

public DataSet getAffectedDataSet()

Gets the data set this command affects.

Returns:

The data set. May be null if no layer was set and no edit layer was found.

Since:

10467

fillModifiedData

public abstract void fillModifiedData(java.util.Collection<OsmPrimitive> modified,
                                      java.util.Collection<OsmPrimitive> deleted,
                                      java.util.Collection<OsmPrimitive> added)

Fill in the changed data this command operates on. Add to the lists, don't clear them.

Parameters:

modified - The modified primitives

deleted - The deleted primitives

added - The added primitives

getParticipatingPrimitives

public java.util.Collection<? extends OsmPrimitive> getParticipatingPrimitives()

Return the primitives that take part in this command. The collection is computed during execution.

Specified by:

getParticipatingPrimitives in interface PseudoCommand

Returns:

primitives that take part in this command

checkOutlyingOrIncompleteOperation

public static int checkOutlyingOrIncompleteOperation(java.util.Collection<? extends OsmPrimitive> primitives,
                                                     java.util.Collection<? extends OsmPrimitive> ignore)

Check whether user is about to operate on data outside of the download area.

Parameters:

primitives - the primitives to operate on

ignore - null or a primitive to be ignored

Returns:

true, if operating on outlying primitives is OK; false, otherwise

ensurePrimitivesAreInDataset

protected void ensurePrimitivesAreInDataset()

Ensures that all primitives that are participating in this command belong to the affected data set. Commands may use this in their update methods to check the consistency of the primitives they operate on.

Throws:

java.lang.AssertionError - if no DataSet is set or if any primitive does not belong to that dataset.

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object