org.web3d.vrml.renderer
Class CRProtoInstance

java.lang.Object
  org.web3d.vrml.renderer.CRProtoInstance

All Implemented Interfaces:

FrameStateListener, VRMLExecutionSpace, VRMLNode, VRMLNodeType, VRMLProtoInstance

public class CRProtoInstance

extends java.lang.Object

implements VRMLProtoInstance, VRMLNodeType

A concrete instance of a Prototype that is common for all renderers.

This class cannot be instantiated directly. The only way to get an instance of this is to ask for one from a proto implementation - either external or normal. As a node that does not form part of the scenegraph, the fields that are those of the root node's definition. If you ask for the normal implementation node, you will also get this first node.

IS Implementation

This implementation handles IS values as a sort of route with a few missing bits. When a value is set in the interface declaration, we look up all the IS related nodes and fields. For each of these we then call sendRoute() on them to update their value.

For the reverse case, when a value changes inside the proto body, we just mark the field as being changed in that node. Then, when someone checks the proto interface field, it will go through the list of related IS nodes and ask their field if it has been updated. If it has, then this value is copied to the interface declaration field and, using setValue() call on the interface field, makes sure it gets propogated to the other users.

Note: The upshot of this implementation is that is does not correctly deal with IS values where the end user has not connected a ROUTE to one of the proto declaration fields. In order to send values to items where there is an IS, we rely on having the user call hasFieldChanged() or setValue() to update all the internal users of the field. In the case where fields are not routed, this means that hasFieldChanged() is never called and hence the other users of IS are never informed.

DEF/USE Handling

Because you can DEF an instance of a Proto, we run into all sorts of interesting problems. As we have to put in Java3D shared groups and stuff we really need access to the root node before it is created. The problem there is that we don't have that access, and even when we do it is too late to deal with the DEF work. In an ideal world, when you ask for the implementation node the J3D node it returns and the node this instance returns are going to be the same thing. DEF completely stuffs with that idea.

The solution implemented here is to take the root node and apply any wrapping that may be needed to get it to work in a shared environment. In order to use a ProtoInstance within the J3D scene you first check for the type being correct by asking for the Implementation node and checking the interface corresponds to one that you are allowed to accept. If that passes then you check for the DEF with isDEF() just like any other node. Then, to add the real object to the scenegraph you call either getSharedObject() or getSceneGraphObject() as appropriate. Note that they must be called on this class instance, not on the implementation node. If you call them on the implementation instance, the results are undefined and will probably lead to a lot of errors generated by the Java3D internals.

Version:

$Revision: 1.60 $

Author:

Justin Couch

Field Summary

protected static java.lang.String	BAD_NODE_MSG A standard message for when the supplied node is wrong.
protected int	bodyNodeCount A counter for the number of body nodes
protected VRMLNodeType[]	bodyNodes The nodes that form the body group
protected boolean	completeBody Whether the protoBody is complete
protected ErrorReporter	errorReporter Reporter instance for handing out errors
protected static java.lang.String	FIELD_CLASH_MSG When the same field is defined twice, but with different types
protected int	FIELD_METADATA Index of the metadata field
protected IntHashMap	fieldChangedMap Map of whether the field index has been changed since last check
protected VRMLFieldData	fieldData Scratch class var for returning field data
protected java.util.List	fieldDeclList List of the field maps registered in order for their definitions.
protected java.util.Map	fieldIndexMap Data mapping holding the field name -> index (Integer) mapping
protected IntHashMap	fieldSizeMap A map of the field indexes (Integer) to the size of the data provided at that field.
protected IntHashMap	fieldValueMap A map of the field indexes (Integer) to their values (object).
protected boolean	inSetup Flag indicating we are in setup mode currently
protected boolean	isDEF Flag indicating this is a DEF node
protected int[]	isListEntry IsList entry to use for sendRoute, the one that triggered the event
protected IntHashMap	isMap The mapping that holds is field index (key) to the list of destination node information.
protected boolean	isStatic Flag for the node being static
protected boolean	isVrml97 Flag indicating VRML97 lookup semantics for IS behaviour
protected int	lastFieldIndex The last field index.
protected static java.lang.String	METADATA_NODE_MSG Message for when the node in setValue() is not a Metadata
protected static java.lang.String	METADATA_PROTO_MSG Message for when the proto is not a Metadata
protected java.lang.String	nodeName The name of this node type
protected VRMLProtoInstance	pMetadata proto representation of the metadata node
protected java.util.HashMap	proxyNodeMap Mapping of an external imported name to the ImportNodeProxy instance
protected int	refCount The current number of references to this node.
protected VRMLNodeType	rootNode The node that describes the type of proto
protected ProtoScene	sceneInfo Contained scene information
protected FrameStateManager	stateManager Frame state manager for this event model instance
protected java.util.Map	uniqueFieldIndexMap Unique version of fieldIndexMap with no exposedField expansions
protected VRMLNodeType	vfMetadata SFNode metadata NULL
protected static java.lang.String	VRML97_FIELD_MSG Message when the field type is not valid in VRML97
protected int	vrmlMajorVersion The major version of the spec this instance belongs to.
protected int	vrmlMinorVersion The minor version of the spec this instance belongs to.

Constructor Summary

protected

CRProtoInstance(java.lang.String name, boolean vrml97, VRMLFieldDeclaration[] fields, int numBodyNodes) Create an instance for the proto with the number of fields.

Method Summary

void	addNodeListener(VRMLNodeListener l) Add a listener to this node instance.
void	allEventsComplete() Ignored by this implementation.
protected int	appendField(VRMLFieldDeclaration field) Append a field declaration to this node.
protected void	fireFieldChanged(int index) Send a notification to the registered listeners that a field has been changed.
java.util.List	getAllFields() Make a listing of all fields that are currently registered in this node.
boolean	getComplete() Find out whether this proto is complete and ready to use.
BasicScene	getContainedScene() Get the contained scene graph that this instance has.
int	getFieldCount() Get the count of the number of fields currently registered.
VRMLFieldDeclaration	getFieldDeclaration(int index) Get the declaration of the field at the given index.
int	getFieldIndex(java.lang.String fieldName) Get the index of the given field name.
VRMLFieldData	getFieldValue(int index) Get the value of a field.
VRMLNodeType	getImplementationNode() Get the first node declared in the proto as that defines just how we we can add this into the scenegraph.
VRMLNodeType	getMetadataObject() Get the currently registered metadata object instance.
int[]	getNodeFieldIndices() Get the list of indices that correspond to fields that contain nodes ie MFNode and SFNode).
int	getNumFields() Get the number of fields defined for this node.
int	getPrimaryType() Get the primary type of this node.
int	getRefCount() Ask for the current number of references to this object.
int[]	getSecondaryType() Get the secondary type of this node.
java.lang.Object	getUserData(int index) Fetch the stored user data for a given field index.
java.lang.String	getVRMLNodeName() Get the name of this node as a string.
boolean	hasFieldChanged(int index) Check to see if the given field has changed since we last checked.
boolean	isDEF() Check to see if this node has been DEFd.
boolean	isSetupFinished() Check to see if setupFinished() has already been called on this node.
void	notifyExternProtoLoaded(int index, VRMLNodeType node) Notify a node that an ExternProto has resolved.
void	removeNodeListener(VRMLNodeListener l) Remove a listener from this node instance.
void	sendRoute(double time, int srcIndex, VRMLNodeType destNode, int destIndex) Send a routed value from this node to the given destination node.
void	setComplete() Denote that this proto is complete and ready to use.
void	setDEF() Notify this node that is has been DEFd.
void	setErrorReporter(ErrorReporter reporter) Register an error reporter with the engine so that any errors generated by the node's internals can be reported in a nice, pretty fashion.
void	setFrameStateManager(FrameStateManager mgr) Set the frame state manager to be used by this proto instance.
void	setMetadataObject(VRMLNodeType data) Set the X3DMetadataObject that is associated with this node.
void	setupFinished() Notification that the construction phase of this node has finished.
void	setUserData(int index, java.lang.Object data) Set arbitrary data for a given field.
void	setValue(int index, boolean value) Set the value of the field at the given index as an boolean.
void	setValue(int index, boolean[] value, int numValid) Set the value of the field at the given index as an array of booleans.
void	setValue(int index, double value) Set the value of the field at the given index as an double.
void	setValue(int index, double[] value, int numValid) Set the value of the field at the given index as an array of doubles.
void	setValue(int index, float value) Set the value of the field at the given index as a float.
void	setValue(int index, float[] value, int numValid) Set the value of the field at the given index as an array of floats.
void	setValue(int index, int value) Set the value of the field at the given index as an integer.
void	setValue(int index, int[] value, int numValid) Set the value of the field at the given index as an array of integers.
void	setValue(int index, long value) Set the value of the field at the given index as an integer.
void	setValue(int index, long[] value, int numValid) Set the value of the field at the given index as an array of integers.
void	setValue(int index, java.lang.String value) Set the value of the field at the given index as a string.
void	setValue(int index, java.lang.String[] value, int numValid) Set the value of the field at the given index as an array of strings.
void	setValue(int index, VRMLNodeType child) Set the value of the field at the given index as a node.
void	setValue(int index, VRMLNodeType[] children, int numValid) Set the value of the field at the given index as an array of nodes.
void	setVersion(int major, int minor, boolean isStatic) Set the version of VRML that this node should represent.
int	updateRefCount(boolean add) Change the reference count up or down by one.

Methods inherited from class java.lang.Object

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

Field Detail

BAD_NODE_MSG

protected static final java.lang.String BAD_NODE_MSG

A standard message for when the supplied node is wrong. Just add the node name of the wrong type to the end.

See Also:

Constant Field Values

METADATA_PROTO_MSG

protected static final java.lang.String METADATA_PROTO_MSG

Message for when the proto is not a Metadata

See Also:

Constant Field Values

METADATA_NODE_MSG

protected static final java.lang.String METADATA_NODE_MSG

Message for when the node in setValue() is not a Metadata

See Also:

Constant Field Values

VRML97_FIELD_MSG

protected static final java.lang.String VRML97_FIELD_MSG

Message when the field type is not valid in VRML97

See Also:

Constant Field Values

FIELD_CLASH_MSG

protected static final java.lang.String FIELD_CLASH_MSG

When the same field is defined twice, but with different types

See Also:

Constant Field Values

errorReporter

protected ErrorReporter errorReporter

Reporter instance for handing out errors

isStatic

protected boolean isStatic

Flag for the node being static

vrmlMajorVersion

protected int vrmlMajorVersion

The major version of the spec this instance belongs to.

vrmlMinorVersion

protected int vrmlMinorVersion

The minor version of the spec this instance belongs to.

fieldIndexMap

protected java.util.Map fieldIndexMap

Data mapping holding the field name -> index (Integer) mapping

uniqueFieldIndexMap

protected java.util.Map uniqueFieldIndexMap

Unique version of fieldIndexMap with no exposedField expansions

fieldDeclList

protected java.util.List fieldDeclList

List of the field maps registered in order for their definitions. When created, this list will have a null value in each index position for the size of the number of declared fields. This allows a user to set(int, object) the value if they want.

nodeName

protected final java.lang.String nodeName

The name of this node type

FIELD_METADATA

protected final int FIELD_METADATA

Index of the metadata field

fieldData

protected final VRMLFieldData fieldData

Scratch class var for returning field data

bodyNodes

protected VRMLNodeType[] bodyNodes

The nodes that form the body group

bodyNodeCount

protected int bodyNodeCount

A counter for the number of body nodes

rootNode

protected VRMLNodeType rootNode

The node that describes the type of proto

sceneInfo

protected ProtoScene sceneInfo

Contained scene information

stateManager

protected FrameStateManager stateManager

Frame state manager for this event model instance

proxyNodeMap

protected java.util.HashMap proxyNodeMap

Mapping of an external imported name to the ImportNodeProxy instance

isMap

protected final IntHashMap isMap

The mapping that holds is field index (key) to the list of destination node information. (ProtoFieldInfo - value).

fieldValueMap

protected final IntHashMap fieldValueMap

A map of the field indexes (Integer) to their values (object). Fields using primitive types have these converted to the equivalent Class.

fieldSizeMap

protected final IntHashMap fieldSizeMap

A map of the field indexes (Integer) to the size of the data provided at that field. Used for multi-value fields and represents the number of elements, not the number of raw values.

fieldChangedMap

protected final IntHashMap fieldChangedMap

Map of whether the field index has been changed since last check

isDEF

protected boolean isDEF

Flag indicating this is a DEF node

inSetup

protected boolean inSetup

Flag indicating we are in setup mode currently

isVrml97

protected boolean isVrml97

Flag indicating VRML97 lookup semantics for IS behaviour

lastFieldIndex

protected int lastFieldIndex

The last field index. Used for extern protos that append fields

isListEntry

protected int[] isListEntry

IsList entry to use for sendRoute, the one that triggered the event

refCount

protected int refCount

The current number of references to this node. This is for informational purposes only and should never be touched by derived classes.

completeBody

protected boolean completeBody

Whether the protoBody is complete

vfMetadata

protected VRMLNodeType vfMetadata

SFNode metadata NULL

pMetadata

protected VRMLProtoInstance pMetadata

proto representation of the metadata node

Constructor Detail

CRProtoInstance

protected CRProtoInstance(java.lang.String name,
                          boolean vrml97,
                          VRMLFieldDeclaration[] fields,
                          int numBodyNodes)

Create an instance for the proto with the number of fields. To set the values of these fields, use the normal setValue methods. The fields are list does not care if it contains null values.

Parameters:

name - The node name of the proto

vrml97 - true if this is a VRML97 issue proto

fields - The fields that need to be set here

numBodyNodes - The number of nodes in the body of the proto

Method Detail

getImplementationNode

public VRMLNodeType getImplementationNode()

Get the first node declared in the proto as that defines just how we we can add this into the scenegraph. If this is an empty prototype implementation, or represents an Extern proto that has not been loaded yet then this will return null.

Specified by:

getImplementationNode in interface VRMLProtoInstance

Returns:

The node instance that represents the first node

getFieldCount

public int getFieldCount()

Get the count of the number of fields currently registered.

Specified by:

getFieldCount in interface VRMLProtoInstance

Returns:

The number of fields available

getAllFields

public java.util.List getAllFields()

Make a listing of all fields that are currently registered in this node. The list contains instances of VRMLFieldDeclaration.

Specified by:

getAllFields in interface VRMLProtoInstance

Returns:

A list of the current field declarations

getRefCount

public int getRefCount()

Ask for the current number of references to this object.

Specified by:

getRefCount in interface VRMLNodeType

Returns:

The number of references to this node

updateRefCount

public int updateRefCount(boolean add)

Change the reference count up or down by one.

Specified by:

updateRefCount in interface VRMLNodeType

Parameters:

add - true to increment the reference count, false to decrement

Returns:

The new reference count

setMetadataObject

public void setMetadataObject(VRMLNodeType data)
                       throws InvalidFieldValueException

Set the X3DMetadataObject that is associated with this node.

Specified by:

setMetadataObject in interface VRMLNodeType

Parameters:

data - The node to register as the metadata

Throws:

InvalidFieldValueException - The object instance provided does not implment VRMLMetadataNodeType or is not a proto instance that encapsulates it as it's primary type

getMetadataObject

public VRMLNodeType getMetadataObject()

Get the currently registered metadata object instance. If none is set then return null.

Specified by:

getMetadataObject in interface VRMLNodeType

Returns:

The current metadata object or null

isSetupFinished

public boolean isSetupFinished()

Check to see if setupFinished() has already been called on this node.

Specified by:

isSetupFinished in interface VRMLNodeType

Returns:

true if setupFinished() has been called

setupFinished

public void setupFinished()

Notification that the construction phase of this node has finished. If the node would like to do any internal processing, such as setting up geometry, then go for it now.

Specified by:

setupFinished in interface VRMLNodeType

setFrameStateManager

public void setFrameStateManager(FrameStateManager mgr)

Set the frame state manager to be used by this proto instance. used to pass in information about the contained scene for extern proto handler.

Specified by:

setFrameStateManager in interface VRMLNodeType

Parameters:

mgr - The manager instance to use

allEventsComplete

public void allEventsComplete()

Ignored by this implementation.

Specified by:

allEventsComplete in interface FrameStateListener

setErrorReporter

public void setErrorReporter(ErrorReporter reporter)

Register an error reporter with the engine so that any errors generated by the node's internals can be reported in a nice, pretty fashion. Setting a value of null will clear the currently set reporter. If one is already set, the new value replaces the old.

Specified by:

setErrorReporter in interface VRMLNode

Parameters:

reporter - The instance to use or null

getVRMLNodeName

public java.lang.String getVRMLNodeName()

Get the name of this node as a string.

Specified by:

getVRMLNodeName in interface VRMLNode

Returns:

The name of the node

setVersion

public void setVersion(int major,
                       int minor,
                       boolean isStatic)

Set the version of VRML that this node should represent. Different versions have different capabilities, even within the same node.

Specified by:

setVersion in interface VRMLNode

Parameters:

major - The major version number of this scene

minor - The minor version number of this scene

isStatic - true if this node is under a static group and won't change after the setup is finished

setDEF

public void setDEF()

Notify this node that is has been DEFd. This method shall only be called before setupFinished(). It is an error to call it any other time. It is also guaranteed that this call will be made after construction, but before any of the setValue() methods have been called.

Specified by:

setDEF in interface VRMLNodeType

Throws:

java.lang.IllegalStateException - The setup is finished.

isDEF

public boolean isDEF()

Check to see if this node has been DEFd. Returns true if it has and the user should ask for the shared representation rather than the normal one.

Specified by:

isDEF in interface VRMLNode

Returns:

true if this node has been DEFd

getFieldIndex

public int getFieldIndex(java.lang.String fieldName)

Get the index of the given field name. If the name does not exist for this node then return a value of -1.

Specified by:

getFieldIndex in interface VRMLNode

Parameters:

fieldName - The name of the field we want the index from

Returns:

The index of the field name or -1

getNodeFieldIndices

public int[] getNodeFieldIndices()

Get the list of indices that correspond to fields that contain nodes ie MFNode and SFNode). Used for blind scene graph traversal without needing to spend time querying for all fields etc. If a node does not have any fields that contain nodes, this shall return null. The field list covers all field types, regardless of whether they are readable or not at the VRML-level.

Specified by:

getNodeFieldIndices in interface VRMLNode

Returns:

The list of field indices that correspond to SF/MFnode fields or null if none

getFieldDeclaration

public VRMLFieldDeclaration getFieldDeclaration(int index)

Get the declaration of the field at the given index. This allows for reverse lookup if needed. If the field does not exist, this will give a value of null.

Specified by:

getFieldDeclaration in interface VRMLNode

Parameters:

index - The index of the field to get information

Returns:

A representation of this field's information

getNumFields

public int getNumFields()

Get the number of fields defined for this node.

Specified by:

getNumFields in interface VRMLNode

Returns:

The number of fields.

addNodeListener

public void addNodeListener(VRMLNodeListener l)

Add a listener to this node instance. If the listener is already added or null the request is silently ignored.

Specified by:

addNodeListener in interface VRMLNodeType

Parameters:

l - The listener instance to add

removeNodeListener

public void removeNodeListener(VRMLNodeListener l)

Remove a listener from this node instance. If the listener is null or not registered, the request is silently ignored.

Specified by:

removeNodeListener in interface VRMLNodeType

Parameters:

l - The listener to be removed

hasFieldChanged

public boolean hasFieldChanged(int index)

Check to see if the given field has changed since we last checked. Calling this method will set the flag back to "not changed" so that two consective reads after a changed value would result in a true and then false being returned. If the field number is not recognized for this node then this returns false.

For a proto instance, we have to check the IS values and so look at every output node that has output mapped back to this field. We never keep a local flag of the fields stored here.

Specified by:

hasFieldChanged in interface VRMLNodeType

Parameters:

index - The index of the field to change.

Returns:

true if the field has changed since last read

getFieldValue

public VRMLFieldData getFieldValue(int index)
                            throws InvalidFieldException

Get the value of a field. If the field is a primitive type, it will return a class representing the value. For arrays or nodes it will return the instance directly.

Specified by:

getFieldValue in interface VRMLNodeType

Parameters:

index - The index of the field to change.

Returns:

The class representing the field value

Throws:

InvalidFieldException - The field index is not known

getPrimaryType

public int getPrimaryType()

Get the primary type of this node. Replaces the instanceof mechanism for use in switch statements.

Specified by:

getPrimaryType in interface VRMLNode

Returns:

The primary type

getSecondaryType

public int[] getSecondaryType()

Get the secondary type of this node. Replaces the instanceof mechanism for use in switch statements. For protos, the secondary type is described as the primary type of the defining node type.

Specified by:

getSecondaryType in interface VRMLNode

Returns:

The secondary type

notifyExternProtoLoaded

public void notifyExternProtoLoaded(int index,
                                    VRMLNodeType node)
                             throws InvalidFieldValueException

Notify a node that an ExternProto has resolved. This will verify the objects type and add it to the render sceneGraph.

Specified by:

notifyExternProtoLoaded in interface VRMLNodeType

Parameters:

index - The field index

node - The node resolved

Throws:

InvalidFieldValueException - If the proto contains he wrong type

sendRoute

public void sendRoute(double time,
                      int srcIndex,
                      VRMLNodeType destNode,
                      int destIndex)

Send a routed value from this node to the given destination node. The route should use the appropriate setValue() method of the destination node. It should not attempt to cast the node up to a higher level. Routing should also follow the standard rules for the loop breaking and other appropriate rules for the specification.

Specified by:

sendRoute in interface VRMLNodeType

Parameters:

time - The time that this route occurred (not necessarily epoch time. Should be treated as a relative value only)

srcIndex - The index of the field in this node that the value should be sent from

destNode - The node reference that we will be sending the value to

destIndex - The index of the field in the destination node that the value should be sent to.

setValue

public void setValue(int index,
                     int value)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as an integer. This would be used to set SFInt32 field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

value - The new value to use for the node

Throws:

InvalidFieldException - The index does not match a known field

InvalidFieldValueException - The value provided is out of range for the field type.

setValue

public void setValue(int index,
                     int[] value,
                     int numValid)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as an array of integers. This would be used to set MFInt32 field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

value - The new value to use for the node

numValid - The number of valid values to copy from the array

Throws:

InvalidFieldException - The index does not match a known field

InvalidFieldValueException - The value provided is out of range for the field type.

setValue

public void setValue(int index,
                     long value)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as an integer. This would be used to set SFLong field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

value - The new value to use for the node

Throws:

InvalidFieldException - The index does not match a known field

InvalidFieldValueException - The value provided is out of range for the field type.

setValue

public void setValue(int index,
                     long[] value,
                     int numValid)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as an array of integers. This would be used to set MFLong field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

value - The new value to use for the node

numValid - The number of valid values to copy from the array

Throws:

InvalidFieldException - The index does not match a known field

InvalidFieldValueException - The value provided is out of range for the field type.

setValue

public void setValue(int index,
                     boolean value)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as an boolean. This would be used to set SFBool field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

value - The new value to use for the node

Throws:

InvalidFieldException - The field index is not know

InvalidFieldValueException - The value provided is out of range for the field type.

setValue

public void setValue(int index,
                     boolean[] value,
                     int numValid)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as an array of booleans. This would be used to set MFBool field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

value - The new value to use for the node

numValid - The number of valid values to copy from the array

Throws:

InvalidFieldException - The field index is not know

InvalidFieldValueException - The value provided is out of range for the field type.

setValue

public void setValue(int index,
                     float value)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as a float. This would be used to set SFFloat field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

value - The new value to use for the node

Throws:

InvalidFieldException - The index does not match a known field

InvalidFieldValueException - The value provided is out of range for the field type.

setValue

public void setValue(int index,
                     float[] value,
                     int numValid)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as an array of floats. This would be used to set MFFloat, SFVec2f, SFVec3f and SFRotation field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

value - The new value to use for the node

numValid - The number of valid values to copy from the array

Throws:

InvalidFieldException - The index does not match a known field

InvalidFieldValueException - The value provided is out of range for the field type.

setValue

public void setValue(int index,
                     double value)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as an double. This would be used to set SFDouble field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

value - The new value to use for the node

Throws:

InvalidFieldException - The index does not match a known field

InvalidFieldValueException - The value provided is out of range for the field type.

setValue

public void setValue(int index,
                     double[] value,
                     int numValid)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as an array of doubles. This would be used to set MFDouble, SFVec2d and SFVec3d field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

value - The new value to use for the node

numValid - The number of valid values to copy from the array

Throws:

InvalidFieldException - The index does not match a known field

InvalidFieldValueException - The value provided is out of range for the field type.

setValue

public void setValue(int index,
                     java.lang.String value)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as a string. This would be used to set SFString field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

value - The new value to use for the node

Throws:

InvalidFieldException - The index does not match a known field

InvalidFieldValueException - The value provided is out of range for the field type.

setValue

public void setValue(int index,
                     java.lang.String[] value,
                     int numValid)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as an array of strings. This would be used to set MFString field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

value - The new value to use for the node

numValid - The number of valid values to copy from the array

Throws:

InvalidFieldException - The index does not match a known field

InvalidFieldValueException - The value provided is out of range for the field type.

setValue

public void setValue(int index,
                     VRMLNodeType child)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as a node. This would be used to set SFNode field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

child - The new value to use for the node

Throws:

InvalidFieldException - The index does not match a known field

InvalidFieldValueException - The value provided is out of range for the field type.

setValue

public void setValue(int index,
                     VRMLNodeType[] children,
                     int numValid)
              throws InvalidFieldException,
                     InvalidFieldValueException

Set the value of the field at the given index as an array of nodes. This would be used to set MFNode field types.

Specified by:

setValue in interface VRMLNodeType

Parameters:

index - The index of destination field to set

children - The new value to use for the node

numValid - The number of valid values to copy from the array

Throws:

InvalidFieldException - The index does not match a known field

InvalidFieldValueException - The value provided is out of range for the field type.

getContainedScene

public BasicScene getContainedScene()

Get the contained scene graph that this instance has. This represents everything about the internal scene that the node declaration wraps. This is a real-time representation so that if it the nodes contains a script that changes the internal representation then this instance will be updated to reflect and changes made.

Specified by:

getContainedScene in interface VRMLExecutionSpace

Returns:

The scene contained by this node instance

appendField

protected int appendField(VRMLFieldDeclaration field)
                   throws FieldExistsException

Append a field declaration to this node. This is added to the current list on the end. If the field already exists with the given name but different values exception will be generated. If the field has exactly the same signature it will silently ignore the request.

Parameters:

field - The new field to add

Returns:

The index that this field was added at

Throws:

FieldExistsException - A conflicting field of the same name already exists for this node

setComplete

public void setComplete()

Denote that this proto is complete and ready to use. Extern protos and local protos resolve completeness differently so this cannot be in the finishCreate method.

getComplete

public boolean getComplete()

Find out whether this proto is complete and ready to use.

Returns:

Is the proto ready to use?

setUserData

public void setUserData(int index,
                        java.lang.Object data)
                 throws InvalidFieldException

Set arbitrary data for a given field. Provided primarily to help the EAI fullfil its requirements, but may be useful elsewhere.

Specified by:

setUserData in interface VRMLNode

Parameters:

index - The index of destination field to set

data - The item to store for the field

Throws:

InvalidFieldException - The field index is not known

getUserData

public java.lang.Object getUserData(int index)
                             throws InvalidFieldException

Fetch the stored user data for a given field index. If nothing is registered, null is returned.

Specified by:

getUserData in interface VRMLNode

Parameters:

index - The index of destination field to set

Returns:

The item stored for the field or null

Throws:

InvalidFieldException - The field index is not known

fireFieldChanged

protected void fireFieldChanged(int index)

Send a notification to the registered listeners that a field has been changed. If no listeners have been registered, then this does nothing, so always call it regardless.

Parameters:

index - The index of the field that changed