Interface-like specification for construtors

Consider this scenario: I want to instantiate one of the implementations of the interface Foo, the exact subclass being chosen at runtime based on user input. The constructor to be used (via Constructor.newInstance()) in such an instantiation has a non-zero argument list - say, SubFoo(double[] a, double[] b). The question is: is there a way (however sinuous it might be) to enforce that all implementations of Foo provide a (double[], double[]) constructor, as it would be if the constructor was a regular method of the interface, or from the moment I begin to use reflection all client programmers who wish to implement Foo are (other then for my documentation) on their own?

ejp wrote:
Why do you care? As long as you only provide a (double[], double[]) constructor in your abstract base class, so that subclasses must provide these values, why do you care what the constructors of the implementation classes look like?Because my design does not have, or otherwise need, an abstract base class, only the interface. For the regular methods of the interface there is no interest in providing a base implementation, as the implementing classes should be free to handle the messages however they wish. Same goes for my imaginary (double[], double[]) constructor - how the constructor arguments should be handled should be entirely up to the subclasses, since only they should know about their instance fields they need to initialize on construction. That means that (according to this design) the abstract base class constructor wouldn't use the arguments for anything useful to the subclasses. And then, as it is not possible to override constructors or make them abstract, it would be pretty much useless...
Hopefully I managed to get across what I'm trying to do design-wise. While I understand that constructors can't be abstract like a regular method due to their special role and - for reasons I read about but didn't really understand - that having static interface methods is not possible as well, I believe what I am trying to achieve makes sense - after all, as far as semantics are concerned a public constructor/static factory method is part of the class' interface (not interface in the Java language construct sense, but in the design concept sense)...

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Specifications for development

hi gurus
how to give thje specifications for development?

To speak at macro level that is at projet manager or at senior levels. The Functional Spec (Specification) which is a comprehensive document is created after the (SRS) Software Requirements Document. It provides more details on selected items originally described in the Software Requirements Template. Elsewhre organizations combine these two documents into a single document.
The Functional Specification describes the features of the desired functinality.. It describes the product's features as seen by the stake holders,and contains the technical information and the data needed for the design and developement.
The Functional Specification defines what the functionality will be of a particulat area that is to be precise a transaction in SAP terminology.
The Functional Specification document to create a detailed design document that explains in detail how the software will be designed and developed.
The functional specification translates the Software Requirements template into a technical description which
a) Ensures that the product feature requirements are correctly understood before moving into the next step, that is detchnical developement process.
b) Clearly and unambiguously provides all the information necessary for the technical consultants to develop the objects.
At the consultant level the functional spects are preapred by functinal consultants on any functionality for the purpose of getting the same functinality designed by the technical pepole as most of the times the functionalities according to the requirements of the clients are not available on ready made basis.
Let me throw some light on documentation which is prepared before and in a project:
1) Templates
2) Heat Analysis -
3) Fit Gap or Gap Analysis
4) Business Process Design
5) Business Process Model
6) Business Change & Impact
7) Configuration Design, which is just 5 % of Total SAP- have different names -
8) Future Impact & Change Assessement
9) Functional Design (Module Wise)
10) Risk Assessement
11) Process Metrics and Many More-- Which has impact on Business and its work flow
In Details
Functional specifications (functional specs), in the end, are the blueprint for how you want a particular report and transaction to look and work. It details what the report will do, how a user will interact with it, and what it will look like. By creating a blueprint of the report or transaction first, time and productivity are saved during the development stage because the programmers can program instead of also working out the logic of the user-experience. It will also enable you to manage the expectations of your clients or management, as they will know exactly what to expect.
A key benefit of writing up a Functional Spec is in streamlining the development process. The developer working from the spec has, ideally, all of their questions answered about the report or transaction and can start building it. And since this is a spec that was approved by the client, they are building nothing less than what the client is expecting. There should be nothing left to guess or interpret when the spec is completed.
Functional Specification
A functional specification (or sometimes functional specifications) is a formal document used to describe in detail for software developers a product's intended capabilities, appearance, and interactions with users. The functional specification is a kind of guideline and continuing reference point as the developers write the programming code. (At least one major product development group used a "Write the manual first" approach. Before the product existed, they wrote the user's guide for a word processing system, then declared that the user's guide was the functional specification. The developers were challenged to create a product that matched what the user's guide described.) Typically, the functional specification for an application program with a series of interactive windows and dialogs with a user would show the visual appearance of the user interface and describe each of the possible user input actions and the program response actions. A functional specification may also contain formal descriptions of user tasks, dependencies on other products, and usability criteria. Many companies have a guide for developers that describes what topics any product's functional specification should contain.
For a sense of where the functional specification fits into the development process, here are a typical series of steps in developing a software product:
Requirements:
This is a formal statement of what the product planners informed by their knowledge of the marketplace and specific input from existing or potential customers believe is needed for a new product or a new version of an existing product. Requirements are usually expressed in terms of narrative statements and in a relatively general way.
Objectives: Objectives are written by product designers in response to the Requirements. They describe in a more specific way what the product will look like. Objectives may describe architectures, protocols, and standards to which the product will conform. Measurable objectives are those that set some criteria by which the end product can be judged. Measurability can be in terms of some index of customer satisfaction or in terms of capabilities and task times. Objectives must recognize time and resource constraints. The development schedule is often part or a corollary of the Objectives.
Functional specification.: The functional specification (usually functional spec or just spec for short) is the formal response to the objectives. It describes all external user and programming interfaces that the product must support.
Design change requests: Throughout the development process, as the need for change to the functional specification is recognized, a formal change is described in a design change request.
Logic Specification:
The structure of the programming (for example, major groups of code modules that support a similar function), individual code modules and their relationships, and the data parameters that they pass to each other may be described in a formal document called a logic specification. The logic specification describes internal interfaces and is for use only by the developers, testers, and, later, to some extent, the programmers that service the product and provide code fixes to the field.
User documentation:
In general, all of the preceding documents (except the logic specification) are used as source material for the technical manuals and online information (such as help pages) that are prepared for the product's users.
Test plan: Most development groups have a formal test plan that describes test cases that will exercise the programming that is written. Testing is done at the module (or unit) level, at the component level, and at the system level in context with other products. This can be thought of as alpha testing. The plan may also allow for beta test. Some companies provide an early version of the product to a selected group of customers for testing in a "real world" situation.
The Final Product:
Ideally, the final product is a complete implementation of the functional specification and design change requests, some of which may result from formal testing and beta testing. The cycle is then repeated for the next version of the product, beginning with a new Requirements statement, which ideally uses feedback from customers about the current product to determine what customers need or want next.
Most software makers adhere to a formal development process similar to the one described above. The hardware development process is similar but includes some additional considerations for the outsourcing of parts and verification of the manufacturing process itself.

Please update the functional specifications for Vendor Balance Report

Dear All,
Please update the functional specifications for Vendor Balance Report with
proper descriptions.
Please include
1. How your selection screen should look like..
2. Output format ( in an excel sheet)
3. Logic for every field in the output format (viz. .. how do link the
vendors from the selection screen to the BKPf and BSEG tables, how do you
find open and closed items in BSEG , etc.)
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tally with the balance as shown in FBL1N for a given vendor for the given
day.'
You need to give the logic for the FBL1N, in that case.
Regards
Rama Mohan

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The 4GB sticks I am using are http://shop.kingston.com/partsinfo.asp?ktcpartno=KTL-TP667/4G
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As you can see from the link above, these little suckers are pricey. But consider the price of 2GB SoDIMMs were $950 when they entered the market a couple of years ago. The price will drop.
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If you have any other questions, please stop by http://blogs.technet.com/keithcombs/archive/2008/07/05/testing-my-apple-macbook- pro-with-8gb-of-ram.aspx and ask there. I'll see them much more quickly.
Cheers,
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Microsoft

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Index:
DOCUMENT INFORMATION
ACCEPTANCE
STAKEHOLDERS
BUSINESS KEY STAKEHOLDERS
OTHER KEY ROLES AND RESPONSIBILITIES
1.    CONFIGURATION FOR PROJECT
2.     DATA STRUCTURES
2.1     APPLICATION DATA STRUCTURE MODEL
2.2     DATA ACCESS OBJECTS
3.     SYSTEM INTERFACE PROCESSES
3.1     SYSTEM CONNECTIVITY MODEL
3.2     SYSTEM INTERFACE DEFINITIONS
3.2.1     Interface Definition:
<Name of the interface e.g. BAPI/RFC, Webservice, Bean etc >
<Name of the interface e.g. BAPI/RFC, Webservice, Bean etc >
3.2.2     <BAPI/RFC, Webservice, Bean >Definition:
<Name of the interface e.g. BAPI/RFC, Webservice, Bean etc >
4.     OBJECT DESIGN
4.1     WEB DYNPRO COMPONENT MODEL
4.1.1     Views used in the WD Component
4.1.2     External Components used in the WD Component
4.1.3     Interface Controller used in the WD Component
4.1.4     Custom Controllers used in WD component
4.1.5     Events, Actions and Methods
4.1.6     Context Elements Defined in WD Components
4.1.7     Context Binding/Mapping in WD Components
4.2     ABAP RFCS
4.2.1     RFC Summary:
5.     USER INTERFACE SCREEN DESIGNS
5.1     VIEW ARRANGEMENT (WINDOWS DIAGRAM)
5.2     NAVIGATION MODELING
5.3     WEBDYNPRO VIEW DETAILS
5.3.1     <View Name>: <This view shows information related to view including screen shots.>
INPUT DATA:
OUTPUT DATA:
6.     APPENDIX A u2013 OUTSTANDING ISSUES

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Thanks,
=Tod

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Interface-like specification for construtors

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