SerializationNode

class simtk.openmm.openmm.SerializationNode(*args, **kwargs)

A SerializationNode stores information about an object during serialization or deserialization.

When an object is serialized, its SerializationProxy is first called to copy information about the object into a SerializationNode. That information can then be written to the output stream in the desired format.

When an object is deserialized, the input stream is read and the information is stored into a SerializationNode. The appropriate SerializationProxy is then called to reconstruct the object.

SerializationNodes are arranged in a tree. There will often be a one-to-one correspondence between objects and SerializationNodes, but that need not always be true. A proxy is free to create whatever child nodes it wants and store information in them using whatever organization is most convenient.

Each SerializationNode can store an arbitrary set of “properties”, represented as key-value pairs. The key is always a string, while the value may be a string, an int, or a double. If a value is specified using one data type and then accessed as a different data type, the node will attempt to convert the value in an appropriate way. For example, it is always reasonable to call getStringProperty() to access a property as a string. Similarly, you can use setStringProperty() to specify a property and then access it using getIntProperty(). This will produce the expected result if the original value was, in fact, the string representation of an int, but if the original string was non-numeric, the result is undefined.

__init__(*args, **kwargs)

Initialize self. See help(type(self)) for accurate signature.

Methods

__init__(*args, **kwargs)	Initialize self.
createChildNode(self, name)	Create a new child node by serializing an object.
getBoolProperty(self, name)	getBoolProperty(self, name, defaultValue) -> bool Get the property with a particular name, specified as a bool.
getChildNode(self, name)	getChildNode(self, name) -> SerializationNode Get a reference to the child node with a particular name.
getChildren(self)	getChildren(self) -> std::vector< OpenMM::SerializationNode,std::allocator< OpenMM::SerializationNode > > & Get a reference to this node’s child nodes.
getDoubleProperty(self, name)	getDoubleProperty(self, name, defaultValue) -> double Get the property with a particular name, specified as a double.
getIntProperty(self, name)	getIntProperty(self, name, defaultValue) -> int Get the property with a particular name, specified as an int.
getName(self)	Get the name of this SerializationNode.
getProperties(self)	Get a map containing all of this node’s properties.
getStringProperty(self, name)	getStringProperty(self, name, defaultValue) -> std::string const & Get the property with a particular name, specified as a string.
hasProperty(self, name)	Determine whether this node has a property with a particular node.
setBoolProperty(self, name, value)	Set the value of a property, specified as a bool.
setDoubleProperty(self, name, value)	Set the value of a property, specified as a double.
setIntProperty(self, name, value)	Set the value of a property, specified as an int.
setName(self, name)	Set the name of this SerializationNode.
setStringProperty(self, name, value)	Set the value of a property, specified as a string.

Attributes

thisown

The membership flag

property thisown

The membership flag

getName(self) → std::string const &

Get the name of this SerializationNode.

setName(self, name)

Set the name of this SerializationNode.

Parameters

name (string) – the new name of the SerializationNode

getChildren(self) → std::vector< OpenMM::SerializationNode,std::allocator< OpenMM::SerializationNode > > const

getChildren(self) -> std::vector< OpenMM::SerializationNode,std::allocator< OpenMM::SerializationNode > > & Get a reference to this node’s child nodes.

getChildNode(self, name) → SerializationNode

getChildNode(self, name) -> SerializationNode Get a reference to the child node with a particular name. If there is no child with the specified name, this throws an exception.

Parameters

the (string) – name of the child node to get

getProperties(self) → mapstringstring

Get a map containing all of this node’s properties.

hasProperty(self, name) → bool

Determine whether this node has a property with a particular node.

Parameters

name (string) – the name of the property to check for

getStringProperty(self, name) → std::string const

getStringProperty(self, name, defaultValue) -> std::string const & Get the property with a particular name, specified as a string. If there is no property with the specified name, a default value is returned instead.

Parameters

• name (string) – the name of the property to get

• defaultValue (string) – the value to return if the specified property does not exist

setStringProperty(self, name, value) → SerializationNode

Set the value of a property, specified as a string.

Parameters

• name (string) – the name of the property to set

• value (string) – the value to set for the property

getIntProperty(self, name) → int

getIntProperty(self, name, defaultValue) -> int Get the property with a particular name, specified as an int. If there is no property with the specified name, a default value is returned instead.

Parameters

• name (string) – the name of the property to get

• defaultValue (int) – the value to return if the specified property does not exist

setIntProperty(self, name, value) → SerializationNode

Set the value of a property, specified as an int.

Parameters

• name (string) – the name of the property to set

• value (int) – the value to set for the property

getBoolProperty(self, name) → bool

getBoolProperty(self, name, defaultValue) -> bool Get the property with a particular name, specified as a bool. If there is no property with the specified name, a default value is returned instead.

Parameters

• name (string) – the name of the property to get

• defaultValue (bool) – the value to return if the specified property does not exist

setBoolProperty(self, name, value) → SerializationNode

Set the value of a property, specified as a bool.

Parameters

• name (string) – the name of the property to set

• value (bool) – the value to set for the property

getDoubleProperty(self, name) → double

getDoubleProperty(self, name, defaultValue) -> double Get the property with a particular name, specified as a double. If there is no property with the specified name, a default value is returned instead.

Parameters

• name (string) – the name of the property to get

• defaultValue (double) – the value to return if the specified property does not exist

setDoubleProperty(self, name, value) → SerializationNode

Set the value of a property, specified as a double.

Parameters

• name (string) – the name of the property to set

• value (double) – the value to set for the property

createChildNode(self, name) → SerializationNode

Create a new child node by serializing an object. A SerializationProxy is automatically selected based on the object’s type, then invoked to populate the newly created node.

Note that, while this method is templatized based on the type of object being serialized, the typeid() operator is used to select the proxy. This means the template argument may be a base class, and the correct proxies will still be selected for objects of different subclasses.

Parameters

• name (string) – the name of the new node to create

• object (T *) – a pointer to the object to serialize

Returns

a reference to the newly created node

Return type

SerializationNode