Sparse object instantiation

A system, comprising:

• a code reuse user interface;
• and
• a processor programmed to:
• allow, within the code reuse user interface executed by the processor, a code developer to specify unused data variables of a coded object definition to be reused, from pre-existing code within a new application, as a partial object without instantiation of the unused data variables;
• detect within the code reuse user interface an indication from the code developer that at least one data variable of the reused coded object definition is specified as unused in the new application;
• and
• externalize, from the code reuse user interface to a runtime environment, the specified at least one unused data variable of the reused coded object definition, where as part of execution of the new application in the runtime environment, the runtime environment instantiates the reused coded object definition as the partial object without instantiation of the specified at least one unused data variable.

A computer program product, comprising:

• a computer readable storage medium having computer readable program code embodied therewith, where the computer readable storage medium is not a transitory signal per se and where the computer readable program code when executed on a computer causes the computer to:
• allow, within a code reuse user interface executed by the computer, a code developer to specify unused data variables of a coded object definition to be reused, from pre-existing code within a new application, as a partial object without instantiation of the unused data variables;
• detect within the code reuse user interface an indication from the code developer that at least one data variable of the reused coded object definition is specified as unused in the new application;
• and
• externalize, from the code reuse user interface to a runtime environment, the specified at least one unused data variable of the reused coded object definition, where as part of execution of the new application in the runtime environment, the runtime environment instantiates the reused coded object definition as the partial object without instantiation of the specified at least one unused data variable.