PropertyBag Class Reference
[Property Interface]

#include </home/sspr/src/www/orocos-1.0/export/build/orocos-rtt-1.2.2/build/rtt/PropertyBag.hpp>

List of all members.

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Detailed Description

A container for holding references to properties.

Introduction

This class groups properties of different types into a single container. A PropertyBag object can handed to a Marshaller object which will serialize the contents of the PropertyBag.

All operations on a PropertyBag are non recursive. The PropertyBag itself is not aware of the possible hierarchical structure. You need to use the global scope functions for handling hierarchical structures.

A PropertyBag is not the owner of the properties within. It defines a group of properties, nothing more. When this group of properties contains another PropertyBag, this bag is considered as a 'pointer' to other properties. Even such a bag is not owned by the PropertyBag.

Constructing PropertyBags

It can happen in an application that a PropertyBag is filled with dynamically created Property objects. The bag is not responsible for cleaning up these objects once they are no longer needed. The application which uses the PropertyBag has to find a way of deleting the possible dangling pointers.

Warning:

The elements in a PropertyBag are unordered. Operations on the bag may change the relative order of the elements.

Using PropertyBags

To add a Property<ClassT> prop to a PropertyBag bag, use

     bag.add(&prop).
     

To retrieve this property, either use find or getProperty to retrieve a Property by name :

     PropertyBase* pb = bag.find( "name" ).
     Property<ClassT> pb = bag.getProperty<ClassT>( "name" ).
     

Both will return null if no such property exists.

See also:

PropertyBase, Property, BagOperations

Public Types
typedef std::vector< PropertyBase * >	Properties
	The container in which the properties are stored.
typedef Properties	PropertyContainerType
	Deprecated, use Properties.
typedef Properties::iterator	iterator
	An iterator over the Properties.
typedef Properties::const_iterator	const_iterator
	A const iterator over the Properties.
typedef std::vector< std::string >	Names
	The container to hold names of Properties.
Public Member Functions
	PropertyBag ()
	The default constructor.
	PropertyBag (const std::string &_type)
	The typed constructor.
	PropertyBag (const PropertyBag &orig)
	The copy constructor.
void	add (PropertyBase *p)
	Add a valid property to the container.
void	remove (PropertyBase *p)
	Remove a property from the container.
bool	addProperty (PropertyBase *p)
	Add a valid property to the container.
bool	removeProperty (PropertyBase *p)
	Remove a property from the container.
void	clear ()
	Removes all PropertyBases from this bag, without deleting them.
void	list (Names &names) const
	List the names of all properties.
Names	list () const
	List the names of all properties.
bool	empty () const
	Return true if no properties are present in this bag.
template<class T>
Property< T > *	getProperty (const std::string &name) const
	Get a Property<T> with name name.
PropertyBase *	getItem (int i) const
	Returns the i'th Property, starting from 0.
size_t	size () const
	Get the number of Properties in this bag.
void	identify (PropertyIntrospection *pi) const
	Identify the contents of this bag through introspection.
void	identify (PropertyBagVisitor *pi) const
	Identify the contents of this bag through introspection.
PropertyBase *	find (const std::string &name) const
	Find the PropertyBase with name name.
PropertyBag &	operator= (const PropertyBag &orig)
	This assignment assigns all PropertyBases of another bag in this bag, making an exact copy or the original.
PropertyBag &	operator<<= (const PropertyBag &source)
	The update operator.
PropertyBag &	operator<< (PropertyBase *item)
	The 'add' operator.
const std::string &	getType () const
void	setType (const std::string &newtype)
Properties &	getProperties ()
const Properties &	getProperties () const
iterator	begin ()
const_iterator	begin () const
iterator	end ()
const_iterator	end () const
Protected Attributes
Properties	mproperties
std::string	type
Classes
struct	FindProp
	A function object for finding a Property by name. More...

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Constructor & Destructor Documentation

PropertyBag

(

const std::string &

_type

)

The typed constructor.

Parameters:

type

The type of PropertyBag.

PropertyBag

(

const PropertyBag &

orig

)

The copy constructor.

The copy constructor of the PropertyBag makes non-deep copies of its elements.

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Member Function Documentation

void add

(

PropertyBase *

p

)

Add a valid property to the container.

Analogous to addProperty.

Parameters:

p

Pointer to the property to be added.

void remove

(

PropertyBase *

p

)

Remove a property from the container.

Analogous to removeProperty.

Parameters:

p

Pointer to the property to be removed.

bool addProperty

(

PropertyBase *

p

)

Add a valid property to the container.

Parameters:

p

Pointer to the property to be added.

Returns:

false if ! p->ready(), true otherwise.

bool removeProperty

(

PropertyBase *

p

)

Remove a property from the container.

Parameters:

p

Pointer to the property to be removed.

void clear

(

)

Removes all PropertyBases from this bag, without deleting them.

This is a not recursive function.

void list

(

Names &

names

)

const

List the names of all properties.

Parameters:

names

The container which will be used to store all available property names in.

Names list

(

)

const

List the names of all properties.

Returns:

A container of names.

Property<T>* getProperty

(

const std::string &

name

)

const [inline]

Get a Property<T> with name name.

Parameters:

	T	The type of which this property is.
	name	The name of the property to search for.

Returns:

The Property<T> with this name, zero if it does not exist ( no such T or no such name )

PropertyBase* getItem

(

int

i

)

const [inline]

Returns the i'th Property, starting from 0.

Returns:

zero if i is out of range.

PropertyBase* find

(

const std::string &

name

)

const

Find the PropertyBase with name name.

Parameters:

name

The name of the property to search for.

Returns:

The PropertyBase with this name, zero if it does not exist.

PropertyBag& operator<<=

(

const PropertyBag &

source

)

The update operator.

It updates this bag so it contains all PropertyBases of another bag, removing own PropertyBases if duplicate names exist in the source bag.

PropertyBag& operator<<

(

PropertyBase *

item

)

[inline]

The 'add' operator.

Equivalent to add().

Parameters:

item

The Property to add to this bag.

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

• rtt/PropertyBag.hpp

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