e57::FloatNode Class Reference

#include <E57Format.h>

Public Member Functions

void checkInvariant (bool doRecurse=true, bool doUpcast=true)
 Check whether FloatNode class invariant is true. More...
 
ImageFile destImageFile () const
 Get the ImageFile that was declared as the destination for the node when it was created. More...
 
void dump (int indent=0, std::ostream &os=std::cout) const
 Diagnostic function to print internal state of object to output stream in an indented format. More...
 
ustring elementName () const
 Get elementName string, that identifies the node in its parent. More...
 
 FloatNode ()=delete
 
 FloatNode (const Node &n)
 Downcast a generic Node handle to a FloatNode handle. More...
 
 FloatNode (ImageFile destImageFile, double value=0.0, FloatPrecision precision=E57_DOUBLE, double minimum=E57_DOUBLE_MIN, double maximum=E57_DOUBLE_MAX)
 Create an E57 element for storing an double precision IEEE floating point number. More...
 
bool isAttached () const
 Has node been attached into the tree of an ImageFile. More...
 
bool isRoot () const
 Is this a root node. More...
 
double maximum () const
 Get the declared maximum that the value may take. More...
 
double minimum () const
 Get the declared minimum that the value may take. More...
 
 operator Node () const
 Upcast a FloatNode handle to a generic Node handle. More...
 
Node parent () const
 Return parent of node, or self if a root node. More...
 
ustring pathName () const
 Get absolute pathname of node. More...
 
FloatPrecision precision () const
 Get declared precision of the floating point number. More...
 
double value () const
 Get IEEE floating point value stored. More...
 

Constructor & Destructor Documentation

◆ FloatNode() [1/3]

e57::FloatNode::FloatNode ( )
delete

◆ FloatNode() [2/3]

FloatNode::FloatNode ( ImageFile  destImageFile,
double  value = 0.0,
FloatPrecision  precision = E57_DOUBLE,
double  minimum = E57_DOUBLE_MIN,
double  maximum = E57_DOUBLE_MAX 
)
explicit

Create an E57 element for storing an double precision IEEE floating point number.

Parameters
[in]destImageFileThe ImageFile where the new node will eventually be stored.
[in]valueThe double precision IEEE floating point value of the element.
[in]precisionThe precision of IEEE floating point to use. May be E57_SINGLE or E57_DOUBLE.
[in]minimumThe smallest value that the value may take.
[in]maximumThe largest value that the value may take.

An FloatNode stores an IEEE floating point number and a lower and upper bound. The FloatNode class corresponds to the ASTM E57 standard Float element. See the class discussion at bottom of FloatNode page for more details.

The destImageFile indicates which ImageFile the FloatNode will eventually be attached to. A node is attached to an ImageFile by adding it underneath the predefined root of the ImageFile (gotten from ImageFile::root). It is not an error to fail to attach the FloatNode to the destImageFile. It is an error to attempt to attach the FloatNode to a different ImageFile.

There is only one FloatNode constructor that handles both E57_SINGLE and E57_DOUBLE precision cases. If precision = E57_SINGLE, then the object will silently round the double precision value to the nearest representable single precision value. In this case, the lower bits will be lost, and if the value is outside the representable range of a single precision number, the exponent may be changed. The same is true for the minimum and maximum arguments.

Warning: it is an error to give an value outside the minimum / maximum bounds, even if the FloatNode is destined to be used in a CompressedVectorNode prototype (where the value will be ignored). If the FloatNode is to be used in a prototype, it is recommended to specify a value = 0 if 0 is within bounds, or a value = minimum if 0 is not within bounds.

Precondition
The destImageFile must be open (i.e. destImageFile.isOpen() must be true).
The destImageFile must have been opened in write mode (i.e. destImageFile.isWritable() must be true).
minimum <= value <= maximum
Returns
A smart FloatNode handle referencing the underlying object.
Exceptions
E57_ERROR_BAD_API_ARGUMENT
E57_ERROR_IMAGEFILE_NOT_OPEN
E57_ERROR_FILE_IS_READ_ONLY
E57_ERROR_VALUE_OUT_OF_BOUNDS
E57_ERROR_INTERNALAll objects in undocumented state
See also
FloatPrecision, FloatNode::value, Node, CompressedVectorNode, CompressedVectorNode::prototype

◆ FloatNode() [3/3]

FloatNode::FloatNode ( const Node n)
explicit

Downcast a generic Node handle to a FloatNode handle.

Parameters
[in]nThe generic handle to downcast.

The handle n must be for an underlying FloatNode, otherwise an exception is thrown. In designs that need to avoid the exception, use Node::type() to determine the actual type of the n before downcasting. This function must be explicitly called (c++ compiler cannot insert it automatically).

Returns
A smart FloatNode handle referencing the underlying object.
Exceptions
E57_ERROR_BAD_NODE_DOWNCAST
See also
Node::type(), FloatNode::operator Node()

Set our shared_ptr to the downcast shared_ptr

References e57::E57_ERROR_BAD_NODE_DOWNCAST, e57::E57_FLOAT, and e57::toString().

Member Function Documentation

◆ checkInvariant()

void FloatNode::checkInvariant ( bool  doRecurse = true,
bool  doUpcast = true 
)

Check whether FloatNode class invariant is true.

Parameters
[in]doRecurseIf true, also check invariants of all children or sub-objects recursively.
[in]doUpcastIf true, also check invariants of the generic Node class.

This function checks at least the assertions in the documented class invariant description (see class reference page for this object). Other internal invariants that are implementation-dependent may also be checked. If any invariant clause is violated, an E57Exception with errorCode of E57_ERROR_INVARIANCE_VIOLATION is thrown.

Checking the invariant recursively may be expensive if the tree is large, so should be used judiciously, in debug versions of the application.

Postcondition
No visible state is modified.
Exceptions
E57_ERROR_INVARIANCE_VIOLATIONor any other E57 ErrorCode

References e57::Node::checkInvariant(), destImageFile(), e57::E57_ERROR_INVARIANCE_VIOLATION, e57::E57_SINGLE, maximum(), minimum(), precision(), and value().

◆ destImageFile()

ImageFile FloatNode::destImageFile ( ) const

Get the ImageFile that was declared as the destination for the node when it was created.

The first argument of the constructors of each of the 8 types of nodes is an ImageFile that indicates which ImageFile the node will eventually be attached to. This function returns that constructor argument. It is an error to attempt to attach the node to a different ImageFile. However it is not an error to not attach the node to any ImageFile (it's just wasteful). Use Node::isAttached to check if the node actually did get attached.

Postcondition
No visible object state is modified.
Returns
The ImageFile that was declared as the destination for the node when it was created.
See also
Node::isAttached, StructureNode::StructureNode(), VectorNode::VectorNode(), CompressedVectorNode::CompressedVectorNode(), IntegerNode::IntegerNode(), ScaledIntegerNode::ScaledIntegerNode(), FloatNode::FloatNode(), StringNode::StringNode(), BlobNode::BlobNode()

Referenced by checkInvariant().

◆ dump()

void FloatNode::dump ( int  indent = 0,
std::ostream &  os = std::cout 
) const

Diagnostic function to print internal state of object to output stream in an indented format.

Parameters
[in]indentNumber of spaces to indent all the printed lines of this object.
[in]osOutput stream to print on.

All objects in the E57 Foundation API (with exception of E57Exception) support a dump() function. These functions print out to the console a detailed listing of the internal state of objects. The content of these printouts is not documented, and is really of interest only to implementation developers/maintainers or the really adventurous users. In implementations of the API other than the Reference Implementation, the dump() functions may produce no output (although the functions should still be defined). The output format may change from version to version.

Postcondition
No visible object state is modified.
Exceptions
NoE57Exceptions

◆ elementName()

ustring FloatNode::elementName ( ) const

Get elementName string, that identifies the node in its parent.

The elementName is a string associated with each parent-child link between nodes. For a given parent, the elementName uniquely identifies each of its children. Thus, any node in a tree can be identified by a sequence of elementNames that form a path from the tree's root node (see Node::pathName for more details).

Three types of nodes (the container node types) can be parents: StructureNode, VectorNode, and CompressedVectorNode. The children of a StructureNode are explicitly given unique elementNames when they are attached to the parent (using StructureNode::set). The children of VectorNode and CompressedVectorNode are implicitly given elementNames based on their position in the list (starting at "0"). In a CompressedVectorNode, the elementName can become quite large: "1000000000" or more. However in a CompressedVectorNode, the elementName string is not stored in the file and is deduced by the position of the child.

Precondition
The destination ImageFile must be open (i.e. destImageFile().isOpen()).
Postcondition
No visible state is modified.
Returns
The element name of the node, or "" if a root node.
Exceptions
E57_ERROR_IMAGEFILE_NOT_OPEN
E57_ERROR_INTERNALAll objects in undocumented state
See also
Node::pathName, Node::parent, Node::isRoot

◆ isAttached()

bool FloatNode::isAttached ( ) const

Has node been attached into the tree of an ImageFile.

Nodes are attached into an ImageFile tree by inserting them as children (directly or indirectly) of the ImageFile's root node. Nodes can also be attached to an ImageFile if they are used in the codecs or prototype trees of an CompressedVectorNode that is attached. Attached nodes will be saved to disk when the ImageFile is closed, and restored when the ImageFile is read back in from disk. Unattached nodes will not be saved to disk. It is not recommended to create nodes that are not eventually attached to the ImageFile.

Precondition
The destination ImageFile must be open (i.e. destImageFile().isOpen()).
Postcondition
No visible object state is modified.
Returns
true if node is child of (or in codecs or prototype of a child CompressedVectorNode of) the root node of an ImageFile.
Exceptions
E57_ERROR_IMAGEFILE_NOT_OPEN
E57_ERROR_INTERNALAll objects in undocumented state
See also
Node::destImageFile, ImageFile::root

◆ isRoot()

bool FloatNode::isRoot ( ) const

Is this a root node.

A root node has itself as a parent (it is not a child of any node). Newly constructed nodes (before they are inserted into an ImageFile tree) start out as root nodes. It is possible to temporarily create small trees that are unattached to any ImageFile. In these temporary trees, the top-most node will be a root node. After the tree is attached to the ImageFile tree, the only root node will be the pre-created one of the ImageTree (the one returned by ImageFile::root). The concept of attachment is slightly larger than that of the parent-child relationship (see Node::isAttached and CompressedVectorNode::CompressedVectorNode for more details).

Precondition
The destination ImageFile must be open (i.e. destImageFile().isOpen()).
Postcondition
No visible state is modified.
Returns
true if this node is a root node.
Exceptions
E57_ERROR_IMAGEFILE_NOT_OPEN
E57_ERROR_INTERNALAll objects in undocumented state
See also
Node::parent, Node::isAttached, CompressedVectorNode::CompressedVectorNode

◆ maximum()

double FloatNode::maximum ( void  ) const

Get the declared maximum that the value may take.

If precision is E57_SINGLE, the single precision maximum is returned as a double. If precision is E57_DOUBLE, the double precision maximum is returned as a double.

Precondition
The destination ImageFile must be open (i.e. destImageFile().isOpen()).
Postcondition
No visible state is modified.
Returns
The declared maximum that the value may take.
Exceptions
E57_ERROR_IMAGEFILE_NOT_OPEN
E57_ERROR_INTERNALAll objects in undocumented state
See also
FloatNode::minimum, FloatNode::value

Referenced by checkInvariant(), and e57::ReaderImpl::ReadData3D().

◆ minimum()

double FloatNode::minimum ( void  ) const

Get the declared minimum that the value may take.

If precision is E57_SINGLE, the single precision minimum is returned as a double. If precision is E57_DOUBLE, the double precision minimum is returned as a double.

Precondition
The destination ImageFile must be open (i.e. destImageFile().isOpen()).
Postcondition
No visible state is modified.
Returns
The declared minimum that the value may take.
Exceptions
E57_ERROR_IMAGEFILE_NOT_OPEN
E57_ERROR_INTERNALAll objects in undocumented state
See also
FloatNode::maximum, FloatNode::value

Referenced by checkInvariant(), and e57::ReaderImpl::ReadData3D().

◆ operator Node()

FloatNode::operator Node ( ) const

Upcast a FloatNode handle to a generic Node handle.

An upcast is always safe, and the compiler can automatically insert it for initializations of Node variables and Node function arguments.

Returns
A smart Node handle referencing the underlying object.
Exceptions
NoE57Exceptions.
See also
Explanation in Node, Node::type()

Upcast from shared_ptr<FloatNodeImpl> to SharedNodeImplPtr and construct a Node object

◆ parent()

Node FloatNode::parent ( ) const

Return parent of node, or self if a root node.

Nodes are organized into trees (acyclic graphs) with a distinguished node (the "top-most" node) called the root node. A parent-child relationship is established between nodes to form a tree. Nodes can have zero or one parent. Nodes with zero parents are called root nodes. In the API, if a node has zero parents it is represented by having itself as a parent. Due to the set-once design of the API, a parent-child relationship cannot be modified once established. A child node can be any of the 8 node types, but a parent node can only be one of the 3 container node types (E57_STRUCTURE, E57_VECTOR, and E57_COMPRESSED_VECTOR). Each parent-child link has a string name (the elementName) associated with it (See Node::elementName for more details). More than one tree can be formed at any given time. Typically small trees are temporarily constructed before attachment to an ImageFile so that they will be written to the disk.

Warning: user algorithms that use this function to walk the tree must take care to handle the case where a node is its own parent (it is a root node). Use Node::isRoot to avoid infinite loops or infinite recursion.

Precondition
The destination ImageFile must be open (i.e. destImageFile().isOpen()).
Postcondition
No visible state is modified.
Returns
A smart Node handle referencing the parent node or this node if is a root node.
Exceptions
E57_ERROR_IMAGEFILE_NOT_OPEN
E57_ERROR_INTERNALAll objects in undocumented state
See also
Node::isRoot, Node::isAttached, CompressedVectorNode::CompressedVectorNode, Node::elementName

Referenced by PathScripts.PathSimulatorGui.CAMSimTaskUi::accept(), Mod.PartDesign.WizardShaft.Shaft.Shaft::equilibrium(), PathScripts.PathSimulatorGui.CAMSimTaskUi::reject(), and PathScripts.PathOpGui.TaskPanelPage::setParent().

◆ pathName()

ustring FloatNode::pathName ( ) const

Get absolute pathname of node.

Nodes are organized into trees (acyclic graphs) by a parent-child relationship between nodes. Each parent-child relationship has an associated elementName string that is unique for a given parent. Any node in a given tree can be identified by a sequence of elementNames of how to get to the node from the root of the tree. An absolute pathname string that is formed by arranging this sequence of elementNames separated by the "/" character with a leading "/" prepended.

Some example absolute pathNames: "/data3D/0/points/153/cartesianX", "/data3D/0/points", "/cameraImages/1/pose/rotation/w", and "/". These examples have probably been attached to an ImageFile. Here is an example absolute pathName of a node in a pose tree that has not yet been attached to an ImageFile: "/pose/rotation/w".

A technical aside: the elementName of a root node does not appear in absolute pathnames, since the "path" is between the staring node (the root) and the ending node. By convention, in this API, a root node has the empty string ("") as its elementName.

Precondition
The destination ImageFile must be open (i.e. destImageFile().isOpen()).
Postcondition
No visible state is modified.
Returns
The absolute path name of the node.
Exceptions
E57_ERROR_IMAGEFILE_NOT_OPEN
E57_ERROR_INTERNALAll objects in undocumented state
See also
Node::elementName, Node::parent, Node::isRoot

◆ precision()

FloatPrecision FloatNode::precision ( ) const

Get declared precision of the floating point number.

Precondition
The destination ImageFile must be open (i.e. destImageFile().isOpen()).
Postcondition
No visible state is modified.
Returns
The declared precision of the floating point number, either E57_SINGLE or E57_DOUBLE.
Exceptions
E57_ERROR_IMAGEFILE_NOT_OPEN
E57_ERROR_INTERNALAll objects in undocumented state
See also
FloatPrecision

Referenced by checkInvariant(), ifc2x3.ifcgeometricrepresentationsubcontext::ifcgeometricrepresentationcontext_precision(), and ifc4.ifcgeometricrepresentationsubcontext::ifcgeometricrepresentationcontext_precision().

◆ value()


The documentation for this class was generated from the following files: