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NXobjectImpl (h5jan API)











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org.eclipse.dawnsci.nexus.impl
Class NXobjectImpl



java.lang.Object


org.eclipse.dawnsci.analysis.tree.impl.NodeImpl


org.eclipse.dawnsci.analysis.tree.impl.GroupNodeImpl


org.eclipse.dawnsci.nexus.impl.NXobjectImpl











All Implemented Interfaces:
java.io.Serializable, java.lang.Iterable<NodeLink>, GroupNode, Node, NXobject


Direct Known Subclasses:
NXapertureImpl, NXattenuatorImpl, NXbeam_stopImpl, NXbeamImpl, NXbending_magnetImpl, NXcapillaryImpl, NXciteImpl, NXcollectionImpl, NXcollimatorImpl, NXcontainerImpl, NXcrystalImpl, NXcylindrical_geometryImpl, NXdataImpl, NXdetector_groupImpl, NXdetector_moduleImpl, NXdetectorImpl, NXdisk_chopperImpl, NXelectrostatic_kickerImpl, NXentryImpl, NXenvironmentImpl, NXevent_dataImpl, NXfermi_chopperImpl, NXfilterImpl, NXflipperImpl, NXfresnel_zone_plateImpl, NXgeometryImpl, NXgratingImpl, NXguideImpl, NXinsertion_deviceImpl, NXinstrumentImpl, NXlogImpl, NXmagnetic_kickerImpl, NXmirrorImpl, NXmoderatorImpl, NXmonitorImpl, NXmonochromatorImpl, NXnoteImpl, NXoff_geometryImpl, NXorientationImpl, NXparametersImpl, NXpinholeImpl, NXpolarizerImpl, NXpositionerImpl, NXprocessImpl, NXquadrupole_magnetImpl, NXreflectionsImpl, NXrootImpl, NXsample_componentImpl, NXsampleImpl, NXsensorImpl, NXseparatorImpl, NXshapeImpl, NXslitImpl, NXsolenoid_magnetImpl, NXsourceImpl, NXspin_rotatorImpl, NXsubentryImpl, NXtransformationsImpl, NXtranslationImpl, NXuserImpl, NXvelocity_selectorImpl, NXxraylensImpl




public abstract class NXobjectImpl
extends GroupNodeImpl
implements NXobject
The abstract superclass of all base class implementation classes.
 Unlike the base class implementation classes, this class is
 not autogenerated.

See Also:
Serialized Form












Field Summary

Fields 

Modifier and Type
Field and Description


static java.lang.String
NX_CLASS
Name of attribute



protected static long
serialVersionUID 






Fields inherited from class org.eclipse.dawnsci.analysis.tree.impl.NodeImpl
attributes, id, INDENT





Fields inherited from interface org.eclipse.dawnsci.analysis.api.tree.Node
ATTRIBUTE, SEPARATOR








Constructor Summary

Constructors 

Modifier
Constructor and Description


protected 
NXobjectImpl()
Creates a new NeXus group node.



protected 
NXobjectImpl(long oid)
Creates a new NeXus group node.










Method Summary

All Methods Instance Methods Concrete Methods 

Modifier and Type
Method and Description


void
addExternalLink(java.lang.String name,
               java.lang.String externalFileName,
               java.lang.String pathToNode)
Adds an external link within the given name within this node to the node
 with the given path within the file with the given name.



protected void
appendNodeString(java.lang.StringBuilder s,
                java.lang.String n) 


boolean
canAddChild(NXobject nexusObject)
Returns whether the given NeXus group object can be added as a child group
 to this base class instance according to the NXDL definition for this base class.



DataNode
createDataNode(java.lang.String name,
              ILazyDataset value)
Creates and adds a new datanode to this group for the given field name and
 with the given dataset as its value.



java.util.Map<java.lang.String,IDataset>
getAllDatasets()
Returns all datasets as a map keyed by field name



Dataset
getAttr(java.lang.String name,
       java.lang.String attrName)
Get the value of the given attribute.



java.lang.Boolean
getAttrBoolean(java.lang.String name,
              java.lang.String attrName)
Get the value of the given attribute as a Boolean, or null if not set.



java.util.Date
getAttrDate(java.lang.String name,
           java.lang.String attrName)
Get the value of the given attribute as a date.



java.lang.Double
getAttrDouble(java.lang.String name,
             java.lang.String attrName)
Get the value of the given attribute as a Double, or null if not set.



java.lang.Long
getAttrLong(java.lang.String name,
           java.lang.String attrName)
Get the value of the given attribute as a Long, or null if not set.



java.lang.Number
getAttrNumber(java.lang.String name,
             java.lang.String attrName)
Get the value of the given attribute as a number.



java.lang.String
getAttrString(java.lang.String name,
             java.lang.String attrName)
Get the value of the given attribute as a String.



java.lang.Boolean
getBoolean(java.lang.String name)
Gets the value of the given field as a boolean, or null if not set



<N extends NXobject>
N
getChild(java.lang.String name,
        java.lang.Class<N> nxClass)
Returns the child of this node of the given type with the given name.



java.util.Map<java.lang.String,NXobject>
getChildren()
Returns a map containing all the children of this node.



<N extends NXobject>
java.util.Map<java.lang.String,N>
getChildren(java.lang.Class<N> nxClass)
Returns a map containing all the children of this node of the given class.



IDataset
getDataset(java.lang.String name)
Gets the dataset for the field with the given name, if it exists, otherwise null.



java.util.Date
getDate(java.lang.String name)
Gets the value of the given field as a date.



java.lang.Double
getDouble(java.lang.String name)
Gets the value of the given field as a Double, or null if not set.



ILazyWriteableDataset
getLazyWritableDataset(java.lang.String name)
Returns the ILazyWriteableDataset for the field within this object with the given name,
 or null if no such field exists, or the dataset for this field is not a
 ILazyWriteableDataset



java.lang.Long
getLong(java.lang.String name)
Gets the value of the given field as a long, or null if not set.



java.lang.Number
getNumber(java.lang.String name)
Gets the value of the given field as a number, or null if not set.



java.lang.String
getString(java.lang.String name)
Gets the value of the given field as a string.



ILazyWriteableDataset
initializeFixedSizeLazyDataset(java.lang.String name,
                              int[] shape,
                              java.lang.Class<?> dtype)
Creates and adds a new ILazyWriteableDataset to this group for the given field
 name with the given fixed shape and of the given element class



ILazyWriteableDataset
initializeLazyDataset(java.lang.String name,
                     int[] maxShape,
                     java.lang.Class<?> dtype)
Creates and adds a new ILazyWriteableDataset to this group for the given field name,
 with the given maximum shape and of the given element class



ILazyWriteableDataset
initializeLazyDataset(java.lang.String name,
                     int rank,
                     java.lang.Class<?> dtype)
Creates and adds a new ILazyWriteableDataset to this group for the given field name,
 with the given rank (dimensionality) and of the given element class



<N extends NXobject>
void
putChild(java.lang.String name,
        N child)
Add a child node with the given name.



void
setAttribute(java.lang.String name,
            java.lang.String attrName,
            java.lang.Object attrValue)
Set the value of the given attribute.



<N extends NXobject>
void
setChildren(java.util.Map<java.lang.String,N> map)
Adds the child nodes with the given names.



DataNode
setDataset(java.lang.String name,
          IDataset value)
Sets the dataset for the field with the given name



protected DataNode
setDate(java.lang.String name,
       java.util.Date date) 


DataNode
setField(java.lang.String name,
        java.lang.Object value)
Set the value of the given field to the given value.



DataNode
setString(java.lang.String name,
         java.lang.String value) 






Methods inherited from class org.eclipse.dawnsci.analysis.tree.impl.GroupNodeImpl
addDataNode, addGroupNode, addNode, addNodeLink, addSymbolicNode, containsDataNode, containsGroupNode, containsNode, containsSymbolicNode, createNodeLink, findLinkedNodeName, findNodeLink, getDataNode, getDataNodeMap, getDataNodes, getDatasets, getGlobalPool, getGroupNode, getGroupNodeMap, getGroupNodes, getNames, getNode, getNodeLink, getNodeNameIterator, getNumberOfDataNodes, getNumberOfGroupNodes, getNumberOfNodelinks, getSymbolicNode, isGroupNode, isPopulated, iterator, removeDataNode, removeDataNode, removeGroupNode, removeGroupNode, removeSymbolicNode, removeSymbolicNode, setGlobalPool, toString





Methods inherited from class org.eclipse.dawnsci.analysis.tree.impl.NodeImpl
addAttribute, containsAttribute, getAttribute, getAttributeIterator, getAttributeNameIterator, getID, getNumberOfAttributes, isDataNode, isSymbolicNode





Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait





Methods inherited from interface org.eclipse.dawnsci.nexus.NXobject
getNexusBaseClass, getNXclass, getPermittedChildGroupClasses





Methods inherited from interface org.eclipse.dawnsci.analysis.api.tree.GroupNode
addDataNode, addGroupNode, addNode, addNodeLink, addSymbolicNode, containsDataNode, containsGroupNode, containsNode, containsSymbolicNode, findLinkedNodeName, findNodeLink, getDataNode, getDataNodeMap, getDataNodes, getDatasets, getGlobalPool, getGroupNode, getGroupNodeMap, getGroupNodes, getNames, getNode, getNodeLink, getNodeNameIterator, getNumberOfDataNodes, getNumberOfGroupNodes, getNumberOfNodelinks, getSymbolicNode, isPopulated, iterator, removeDataNode, removeDataNode, removeGroupNode, removeGroupNode, removeSymbolicNode, removeSymbolicNode, setGlobalPool





Methods inherited from interface org.eclipse.dawnsci.analysis.api.tree.Node
addAttribute, containsAttribute, getAttribute, getAttributeIterator, getAttributeNameIterator, getID, getNumberOfAttributes, isDataNode, isGroupNode, isSymbolicNode





Methods inherited from interface java.lang.Iterable
forEach, spliterator














Field Detail





serialVersionUID
protected static final long serialVersionUID

See Also:
Constant Field Values








NX_CLASS
public static final java.lang.String NX_CLASS
Name of attribute

See Also:
Constant Field Values










Constructor Detail





NXobjectImpl
protected NXobjectImpl()
Creates a new NeXus group node. This constructor is used when
 create a new NeXus file







NXobjectImpl
protected NXobjectImpl(long oid)
Creates a new NeXus group node. This constructor is used when loading
 a new NeXus file. No further nodes should be added to a NeXus tree that has
 been loaded from disk.

Parameters:
oid - 










Method Detail





canAddChild
public boolean canAddChild(NXobject nexusObject)
Description copied from interface: NXobject
Returns whether the given NeXus group object can be added as a child group
 to this base class instance according to the NXDL definition for this base class.

Specified by:
canAddChild in interface NXobject
Parameters:
nexusObject - potential child nexus group object
Returns:
true if the given group object can be added as a child of this base
    class instance, false otherwise








getChild
public <N extends NXobject> N getChild(java.lang.String name,
                                       java.lang.Class<N> nxClass)
Description copied from interface: NXobject
Returns the child of this node of the given type with the given name.

Specified by:
getChild in interface NXobject
Parameters:
name - of child
nxClass - class of child
Returns:
named child NXobject of given NeXus class or null if none








getDataset
public IDataset getDataset(java.lang.String name)
Description copied from interface: NXobject
Gets the dataset for the field with the given name, if it exists, otherwise null.
 Note that this method should only be used for small datasets, i.e. those set before the scan.
 To get the dataset for larger datasets (i.e. data acquired during the scan) use
 getDataNode(name).getDataset() which returns an ILazyDataset.

Specified by:
getDataset in interface NXobject
Parameters:
name - dataset name
Returns:
the dataset for the field with the given name, or null if the no such dataset exists








getLazyWritableDataset
public ILazyWriteableDataset getLazyWritableDataset(java.lang.String name)
Description copied from interface: NXobject
Returns the ILazyWriteableDataset for the field within this object with the given name,
 or null if no such field exists, or the dataset for this field is not a
 ILazyWriteableDataset

Specified by:
getLazyWritableDataset in interface NXobject
Parameters:
name - field name
Returns:
the ILazyWriteableDataset for the given field if it exists, otherwise null








setDataset
public DataNode setDataset(java.lang.String name,
                           IDataset value)
Description copied from interface: NXobject
Sets the dataset for the field with the given name

Specified by:
setDataset in interface NXobject
Returns:
the new data node, for convenience








initializeLazyDataset
public ILazyWriteableDataset initializeLazyDataset(java.lang.String name,
                                                   int rank,
                                                   java.lang.Class<?> dtype)
Description copied from interface: NXobject
Creates and adds a new ILazyWriteableDataset to this group for the given field name,
 with the given rank (dimensionality) and of the given element class

Specified by:
initializeLazyDataset in interface NXobject
Parameters:
name - field name
rank - rank
dtype - dataset element class
Returns:
new lazy writable dataset








initializeLazyDataset
public ILazyWriteableDataset initializeLazyDataset(java.lang.String name,
                                                   int[] maxShape,
                                                   java.lang.Class<?> dtype)
Description copied from interface: NXobject
Creates and adds a new ILazyWriteableDataset to this group for the given field name,
 with the given maximum shape and of the given element class

Specified by:
initializeLazyDataset in interface NXobject
Parameters:
name - field name
maxShape - the maximum shape
dtype - dataset element class
Returns:
new lazy writable dataset








initializeFixedSizeLazyDataset
public ILazyWriteableDataset initializeFixedSizeLazyDataset(java.lang.String name,
                                                            int[] shape,
                                                            java.lang.Class<?> dtype)
Description copied from interface: NXobject
Creates and adds a new ILazyWriteableDataset to this group for the given field
 name with the given fixed shape and of the given element class

Specified by:
initializeFixedSizeLazyDataset in interface NXobject
Parameters:
name - field name
dtype - dataset element class
Returns:
new lazy writable dataset








addExternalLink
public void addExternalLink(java.lang.String name,
                            java.lang.String externalFileName,
                            java.lang.String pathToNode)
Description copied from interface: NXobject
Adds an external link within the given name within this node to the node
 with the given path within the file with the given name.
 The external file need not exist at the time this method is invoked.

Specified by:
addExternalLink in interface NXobject
Parameters:
name - name of link within this group
externalFileName - name of external file to link to
pathToNode - path of node within external file to link to








createDataNode
public DataNode createDataNode(java.lang.String name,
                               ILazyDataset value)
Description copied from interface: NXobject
Creates and adds a new datanode to this group for the given field name and
 with the given dataset as its value. The given dataset may be either a
 ILazyWriteableDataset or an IDataset.

Specified by:
createDataNode in interface NXobject
Parameters:
name - field name
value - dataset
Returns:
new data node








getChildren
public <N extends NXobject> java.util.Map<java.lang.String,N> getChildren(java.lang.Class<N> nxClass)
Description copied from interface: NXobject
Returns a map containing all the children of this node of the given class. The keys of the
 map are the names of the child nodes.

Specified by:
getChildren in interface NXobject
Parameters:
nxClass - class of children.
Returns:
map of children, key is child node's name








getChildren
public java.util.Map<java.lang.String,NXobject> getChildren()
Description copied from interface: NXobject
Returns a map containing all the children of this node. The keys of the map are the
 names of the child nodes within this NXobject.

Specified by:
getChildren in interface NXobject
Returns:
map of children, key is the child node's name










putChild
public <N extends NXobject> void putChild(java.lang.String name,
                                          N child)
Description copied from interface: NXobject
Add a child node with the given name. This method should be used with caution
 as it allows a child group to be added that may not be permitted by the NXDL
 base class definition for this base class. In preference, the relevant
 set method on the base class specific sub-interface of this interface
 should be used.

Specified by:
putChild in interface NXobject
Parameters:
name - name of child group
child - child group








setChildren
public <N extends NXobject> void setChildren(java.util.Map<java.lang.String,N> map)
Description copied from interface: NXobject
Adds the child nodes with the given names.
 This method should be used with caution as it allows a child group
 to be added that may not be permitted by the NXDL
 base class definition for this base class. In preference, the relevant
 set method on the base class specific sub-interface of this interface
 should be used.

Specified by:
setChildren in interface NXobject
Parameters:
map - map from names to child nodes to add








getString
public java.lang.String getString(java.lang.String name)
Description copied from interface: NXobject
Gets the value of the given field as a string.

Specified by:
getString in interface NXobject
Parameters:
name - name of field
Returns:
the value of the given field as a string, null if
   there is no field with the given name








setString
public DataNode setString(java.lang.String name,
                          java.lang.String value)







getAllDatasets
public java.util.Map<java.lang.String,IDataset> getAllDatasets()
Description copied from interface: NXobject
Returns all datasets as a map keyed by field name

Specified by:
getAllDatasets in interface NXobject
Returns:
all datasets








getBoolean
public java.lang.Boolean getBoolean(java.lang.String name)
Description copied from interface: NXobject
Gets the value of the given field as a boolean, or null if not set

Specified by:
getBoolean in interface NXobject
Parameters:
name - name of field
Returns:
the value of the given field as a boolean, null if
   there is no field with the given name








getLong
public java.lang.Long getLong(java.lang.String name)
Description copied from interface: NXobject
Gets the value of the given field as a long, or null if not set.

Specified by:
getLong in interface NXobject
Parameters:
name - name of field
Returns:
the value of the given field as a long, null if
   there is no field with the given name








getDouble
public java.lang.Double getDouble(java.lang.String name)
Description copied from interface: NXobject
Gets the value of the given field as a Double, or null if not set.

Specified by:
getDouble in interface NXobject
Parameters:
name - name of field
Returns:
the value of the given field as a double, null if
   there is no field with the given name








getNumber
public java.lang.Number getNumber(java.lang.String name)
Description copied from interface: NXobject
Gets the value of the given field as a number, or null if not set.

Specified by:
getNumber in interface NXobject
Parameters:
name - name of field
Returns:
the value of the given field as a number, null if
   there is no field with the given name








getDate
public java.util.Date getDate(java.lang.String name)
Description copied from interface: NXobject
Gets the value of the given field as a date.

Specified by:
getDate in interface NXobject
Parameters:
name - name of field
Returns:
the value of the given field as a date, null if
   there is no field with the given name, or the value cannot be parsed as a date








setField
public DataNode setField(java.lang.String name,
                         java.lang.Object value)
Set the value of the given field to the given value. The
 value may be an atomic value (e.g. primitive wrapper, object or string),
 or a dataset.

Specified by:
setField in interface NXobject
Parameters:
name - name
value - value
Returns:
the newly created DataNode.








setDate
protected DataNode setDate(java.lang.String name,
                           java.util.Date date)







setAttribute
public void setAttribute(java.lang.String name,
                         java.lang.String attrName,
                         java.lang.Object attrValue)
Description copied from interface: NXobject
Set the value of the given attribute. If the first argument is not null
 then the attribute is set on the field or child group with this name

Specified by:
setAttribute in interface NXobject
Parameters:
name - name of node (if null then current group)
attrName - attribute name
attrValue - attribute value








getAttr
public Dataset getAttr(java.lang.String name,
                       java.lang.String attrName)
Description copied from interface: NXobject
Get the value of the given attribute. If the first argument is
 not null then returns the value of attribute of the field
 or child group with that name.

Specified by:
getAttr in interface NXobject
Parameters:
name - name of node (if null then current group)
attrName - attribute name
Returns:
value of attribute as a long








getAttrString
public java.lang.String getAttrString(java.lang.String name,
                                      java.lang.String attrName)
Description copied from interface: NXobject
Get the value of the given attribute as a String. If the first argument is
 not null then returns the value of attribute of the field
 or child group with that name.

Specified by:
getAttrString in interface NXobject
Parameters:
name - name of node (if null then current group)
attrName - attribute name
Returns:
value of attribute as a long








getAttrBoolean
public java.lang.Boolean getAttrBoolean(java.lang.String name,
                                        java.lang.String attrName)
Description copied from interface: NXobject
Get the value of the given attribute as a Boolean, or null if not set.
 If the first argument is not null then returns the value of attribute of the
 field or child group with that name.

Specified by:
getAttrBoolean in interface NXobject
Parameters:
name - name of node (if null then current group)
attrName - attribute name
Returns:
value of attribute as a Boolean, or null if not set








getAttrLong
public java.lang.Long getAttrLong(java.lang.String name,
                                  java.lang.String attrName)
Description copied from interface: NXobject
Get the value of the given attribute as a Long, or null if not set.
 If the first argument is not null then returns the value of attribute of the
 field or child group with that name.

Specified by:
getAttrLong in interface NXobject
Parameters:
name - name of node (if null then current group)
attrName - attribute name
Returns:
value of attribute as a Long, or null if not set








getAttrDouble
public java.lang.Double getAttrDouble(java.lang.String name,
                                      java.lang.String attrName)
Description copied from interface: NXobject
Get the value of the given attribute as a Double, or null if not set.
 If the first argument is not null then returns the value of attribute of the
 field or child group with that name.

Specified by:
getAttrDouble in interface NXobject
Parameters:
name - name of node (if null then current group)
attrName - attribute name
Returns:
value of attribute as a double








getAttrNumber
public java.lang.Number getAttrNumber(java.lang.String name,
                                      java.lang.String attrName)
Description copied from interface: NXobject
Get the value of the given attribute as a number. If the first argument is
 not null then returns the value of attribute of the field
 or child group with that name.

Specified by:
getAttrNumber in interface NXobject
Parameters:
name - name of node (if null then current group)
attrName - attribute name
Returns:
value of attribute as a number








getAttrDate
public java.util.Date getAttrDate(java.lang.String name,
                                  java.lang.String attrName)
Description copied from interface: NXobject
Get the value of the given attribute as a date. If the first argument is
 not null then returns the value of attribute of the field
 or child group with that name.

Specified by:
getAttrDate in interface NXobject
Parameters:
name - name of node (if null then current group)
attrName - attribute name
Returns:
value of attribute as a date, or null if
   no such attribute or value cannot be parsed as a date








appendNodeString
protected void appendNodeString(java.lang.StringBuilder s,
                                java.lang.String n)

Overrides:
appendNodeString in class GroupNodeImpl














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Summary: 
Nested | 
Field | 
Constr | 
Method


Detail: 
Field | 
Constr | 
Method

Modifier and Type	Field and Description
`static java.lang.String`	`NX_CLASS` Name of attribute
`protected static long`	`serialVersionUID`

Modifier	Constructor and Description
`protected`	`NXobjectImpl()` Creates a new NeXus group node.
`protected`	`NXobjectImpl(long oid)` Creates a new NeXus group node.

Modifier and Type	Method and Description
`void`	`addExternalLink(java.lang.String name, java.lang.String externalFileName, java.lang.String pathToNode)` Adds an external link within the given name within this node to the node with the given path within the file with the given name.
`protected void`	`appendNodeString(java.lang.StringBuilder s, java.lang.String n)`
`boolean`	`canAddChild(NXobject nexusObject)` Returns whether the given NeXus group object can be added as a child group to this base class instance according to the NXDL definition for this base class.
`DataNode`	`createDataNode(java.lang.String name, ILazyDataset value)` Creates and adds a new datanode to this group for the given field name and with the given dataset as its value.
`java.util.Map<java.lang.String,IDataset>`	`getAllDatasets()` Returns all datasets as a map keyed by field name
`Dataset`	`getAttr(java.lang.String name, java.lang.String attrName)` Get the value of the given attribute.
`java.lang.Boolean`	`getAttrBoolean(java.lang.String name, java.lang.String attrName)` Get the value of the given attribute as a `Boolean`, or `null` if not set.
`java.util.Date`	`getAttrDate(java.lang.String name, java.lang.String attrName)` Get the value of the given attribute as a date.
`java.lang.Double`	`getAttrDouble(java.lang.String name, java.lang.String attrName)` Get the value of the given attribute as a `Double`, or `null` if not set.
`java.lang.Long`	`getAttrLong(java.lang.String name, java.lang.String attrName)` Get the value of the given attribute as a `Long`, or `null` if not set.
`java.lang.Number`	`getAttrNumber(java.lang.String name, java.lang.String attrName)` Get the value of the given attribute as a number.
`java.lang.String`	`getAttrString(java.lang.String name, java.lang.String attrName)` Get the value of the given attribute as a `String`.
`java.lang.Boolean`	`getBoolean(java.lang.String name)` Gets the value of the given field as a boolean, or `null` if not set
`<N extends NXobject> N`	`getChild(java.lang.String name, java.lang.Class<N> nxClass)` Returns the child of this node of the given type with the given name.
`java.util.Map<java.lang.String,NXobject>`	`getChildren()` Returns a map containing all the children of this node.
`<N extends NXobject> java.util.Map<java.lang.String,N>`	`getChildren(java.lang.Class<N> nxClass)` Returns a map containing all the children of this node of the given class.
`IDataset`	`getDataset(java.lang.String name)` Gets the dataset for the field with the given name, if it exists, otherwise `null`.
`java.util.Date`	`getDate(java.lang.String name)` Gets the value of the given field as a date.
`java.lang.Double`	`getDouble(java.lang.String name)` Gets the value of the given field as a `Double`, or `null` if not set.
`ILazyWriteableDataset`	`getLazyWritableDataset(java.lang.String name)` Returns the `ILazyWriteableDataset` for the field within this object with the given name, or `null` if no such field exists, or the dataset for this field is not a `ILazyWriteableDataset`
`java.lang.Long`	`getLong(java.lang.String name)` Gets the value of the given field as a long, or `null` if not set.
`java.lang.Number`	`getNumber(java.lang.String name)` Gets the value of the given field as a number, or `null` if not set.
`java.lang.String`	`getString(java.lang.String name)` Gets the value of the given field as a string.
`ILazyWriteableDataset`	`initializeFixedSizeLazyDataset(java.lang.String name, int[] shape, java.lang.Class<?> dtype)` Creates and adds a new `ILazyWriteableDataset` to this group for the given field name with the given fixed shape and of the given element class
`ILazyWriteableDataset`	`initializeLazyDataset(java.lang.String name, int[] maxShape, java.lang.Class<?> dtype)` Creates and adds a new `ILazyWriteableDataset` to this group for the given field name, with the given maximum shape and of the given element class
`ILazyWriteableDataset`	`initializeLazyDataset(java.lang.String name, int rank, java.lang.Class<?> dtype)` Creates and adds a new `ILazyWriteableDataset` to this group for the given field name, with the given rank (dimensionality) and of the given element class
`<N extends NXobject> void`	`putChild(java.lang.String name, N child)` Add a child node with the given name.
`void`	`setAttribute(java.lang.String name, java.lang.String attrName, java.lang.Object attrValue)` Set the value of the given attribute.
`<N extends NXobject> void`	`setChildren(java.util.Map<java.lang.String,N> map)` Adds the child nodes with the given names.
`DataNode`	`setDataset(java.lang.String name, IDataset value)` Sets the dataset for the field with the given name
`protected DataNode`	`setDate(java.lang.String name, java.util.Date date)`
`DataNode`	`setField(java.lang.String name, java.lang.Object value)` Set the value of the given field to the given value.
`DataNode`	`setString(java.lang.String name, java.lang.String value)`