EGL (programming language): Difference between revisions

Revision as of 11:35, 31 July 2017

Revision as of 17:42, 11 May 2020

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An EGL Program part is a generatable logic part with one entry point. Each Program part contains a main() function, which represents the logic that runs at program start up. A program can include other functions and can access functions that are outside of the program. The function main() can invoke those other functions. Program functions are composed of a set of EGL statements, variables, and constants.

<sourcesyntaxhighlight lang="pascal" line highlight="5">

Program HelloWorld

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end

</syntaxhighlight>

</source>

=== Record ===

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An EGL Record part defines a set of data elements. In this example, a record with the name '''''CustomerRecord''''' is defined with 6 fields.

<sourcesyntaxhighlight lang="pascal">

Record CustomerRecord type BasicRecord

customerNumber INT;

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customerBalance MONEY;

end

</syntaxhighlight>

</source>

EGL has a specialized type of record called '''''SQLRecord''''' that is used to exchange data with a relational database.

<sourcesyntaxhighlight lang="text">

record Employee type sqlRecord { tableNames =[["Employee"]], keyItems =[EMPNO]}

EMPNUMBER string{ column = "EMPNO", maxLen = 6};

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end

</syntaxhighlight>

</source>

* In this example, the record '''''Employee''''' is bound to a table (or view) named '''''Employee'''''.

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An EGL Service part contains public functions meant to be accessed from other applications or systems. In this example, a service with two functions is defined.

<sourcesyntaxhighlight lang="pascal" line highlight="1,5,11">

package com.mycompany.services;

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end

</syntaxhighlight>

</source>

* In EGL, code is organized in packages (like [[Java (programming language)]])

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The main component of a Rich UI application is a Rich UI handler part. These parts are generated into JavaScript.

<sourcesyntaxhighlight lang="javascript" line highlight="8">

package com.mycompany.ui;

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end

</syntaxhighlight>

</source>

== Web 2.0 with EGL ==