Objects, Perl

This provides much more flexibility, as the data objects returned by the object loader can be passed to other programs, such as those written in C, C++, Java Perl or Python, passed over the Internet via a CORBA server or used to create more interesting views, such as a view including an image made from data in the object (an example of this can be seen in Figure 1.11 further in this Chapter). 

The API interfaces to SRS provide an object oriented programmers interface into an SRS system. This allows programmers to access the databases in their SRS system from their programs written in C++, Perl, Java or Python. The databases can be queried and information retrieved about the set of entries. The SRS system itself can be interrogated about the databases available and the fields which can be queried within those databases. 

The GUS application framework consists of a Perl and Java object layer complemented by a pipeline, GUI applications, and a Web development kit. The object layer includes one-to-one mappings between object and tables/views. 

Four APIs to caBIO are available, each suitable for different client-programming environments Java, Perl, SOAP, and HTTP-XML. Domain objects represent... 

An action invokes a custom Perl object it defines input data and result data in a state transition. 

A validator invokes a custom Perl object for data validation. 

In order to add an additional EOS module, the user needs to supply an object-oriented Perl module that... 

One of the most powerful aspects of the HCToolkit is its extensibility in Perl. This allows rapid development of new applications for specific tasks. For example, an included extension quickly calculates and plots a pressure-temperature phase diagram at user-specified conditions (PT-PhaseDiagram.pl, found in the /apps subdirectory of the distribution tree). In fact, a scripting application that does some sort of equilibrium calculation needs only do four things create a database connection, use that connection to load a pre-defined fluid, initialize the flash object and do the flash calculation. These steps are shown in Figure 4. 

Perl has many featines that caimot be covered in a single chapter. For example, subroutines allow one to define customized functions that take arguments and retimi a result. References allow sophisticated data structures such as lists of lists to be created. Objects allow large, complex programs to be written so that code can be reused in different contexts. Pipes and processes allow for the control of external programs, perhaps to create an automated pipeline invoking commonly used programs. 

Python Python is a free object-oriented, easy-to-leam progranuning language and is useful in applieation development [15], It overcomes some of the drawbacks of Perl. It contains scalable, extendable scripting and can be embedded ... 

R. Perle, Hearing...t/.5. Government Controls on Sales to Iraq, pp.44, 54 Strengthening the Export Licensing System, p.44 A. Friedman, US Officials Ignored Objections to Dual-use exports to Iraq , Financial Times, 19 September 1990, p.2. 

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