IMP::example::ExampleObject Class Reference

An example simple object which is reference counted. More...

#include <IMP/example/ExampleObject.h>

Inheritance diagram for IMP::example::ExampleObject:

Public Member Functions
	ExampleObject (const Floats &data)
double	get_data (unsigned int i) const
virtual std::string	get_type_name () const
virtual ::IMP::base::VersionInfo	get_version_info () const
	Get information about the module and version of the object.
Public Member Functions inherited from IMP::base::Object
virtual void	clear_caches ()
virtual void	do_destroy ()
CheckLevel	get_check_level () const
LogLevel	get_log_level () const
void	set_check_level (CheckLevel l)
void	set_log_level (LogLevel l)
	Set the logging level used in this object. More...
void	set_was_used (bool tf) const
void	show (std::ostream &out=std::cout) const
const std::string &	get_name () const
void	set_name (std::string name)

Additional Inherited Members
Protected Member Functions inherited from IMP::base::Object
	Object (std::string name)
	Construct an object with the given name. More...

Detailed Description

Only IMP::Pointer objects should be used to store pointers to instances of these objects.

The source code is as follows:

/**
 *  \file IMP/example/ExampleObject.h
 *  \brief An example showing how to make a simple ref counted object
 *
 *  Copyright 2007-2014 IMP Inventors. All rights reserved.
 */

#ifndef IMPEXAMPLE_EXAMPLE_OBJECT_H
#define IMPEXAMPLE_EXAMPLE_OBJECT_H

#include <IMP/example/example_config.h>

#include <IMP/base/Object.h>
#include <IMP/base/object_macros.h>
#include <IMP/base/types.h>
#include <IMP/base/Pointer.h>
#include <vector>

IMPEXAMPLE_BEGIN_NAMESPACE

//! An example simple object which is reference counted.
/** Only IMP::Pointer objects should be used to store pointers to
    instances of these objects.

    The source code is as follows:
    \include ExampleObject.h
    \include ExampleObject.cpp
 */
class IMPEXAMPLEEXPORT ExampleObject : public base::Object {
  Floats data_;

 public:
  ExampleObject(const Floats &data);

  double get_data(unsigned int i) const {
    IMP_USAGE_CHECK(i < data_.size(), "Index " << i << " out of range.");
    return data_[i];
  }

  /* Make sure that it can't be allocated on the stack
     The macro defines an empty destructor. In general,
     you want destructors to be empty since they are hard
     to maintain.
  */
  IMP_OBJECT_METHODS(ExampleObject);
};

typedef base::Vector<base::Pointer<ExampleObject> > ExampleObjects;
typedef base::Vector<base::WeakPointer<ExampleObject> > ExampleObjectsTemp;

IMPEXAMPLE_END_NAMESPACE

#endif /* IMPEXAMPLE_EXAMPLE_OBJECT_H */

/**
 *  \file ExampleObject.cpp
 *  \brief An example reference counted object.
 *
 *  Copyright 2007-2014 IMP Inventors. All rights reserved.
 *
 */

#include "IMP/example/ExampleObject.h"
#include "IMP/base/Pointer.h"

IMPEXAMPLE_BEGIN_NAMESPACE

ExampleObject::ExampleObject(const Floats &data)
    : base::Object("ExampleObject%1%"), data_(data) {}
namespace {

#ifdef __clang__
IMP_CLANG_PRAGMA(diagnostic ignored "-Wunused-function")
#endif

/** An example of how to return a new object. */
ExampleObject *create_example_object(const Floats &data) {
  IMP_NEW(ExampleObject, ret, (data));
  // one could do some work here

  // make sure it is not freed
  return ret.release();
}

void usage_example() {
  Floats data(1000, -1);

  // this would not compile
  // ExampleObject rcstack;

  // create a new object and store it in a ref counted pointer
  IMP_NEW(ExampleObject, rc, (data));
  // reference count is 1

  // another object with another copy of the data
  base::Pointer<ExampleObject> rc_other = new ExampleObject(data);

  // have two pointers point to the object
  base::Pointer<ExampleObject> rc2 = rc;
  // reference count is 2

  // the object is still around since rc2 points to it
  rc = static_cast<ExampleObject *>(nullptr);
  // reference count is 1

  std::cout << rc2->get_data(100);
  // the object will be deleted on exit
}
}

IMPEXAMPLE_END_NAMESPACE

Definition at line 29 of file ExampleObject.h.

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

• ExampleObject.h