how to get input from barcode reader in java Getting Ready for Production in Java

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Getting Ready for Production
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Option Check All Check Universe Structure
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Purpose Checks all components within the universe, except for cardinalities, which must be explicitly selected Compares the structure information in the Structure pane with the tables and columns within the RDBMS If there is a difference between the two, Designer will give a warning Tables within the Table Browser that have been removed or renamed but that are not in the Structure pane will not cause an error If you regularly refresh your structure with View | Refresh Structure, this check should return no errors Similar to the Parse button within the Object definition, this verifies that the SQL SELECT and WHERE syntax is correct and that the TABLECOLUMN for each object is valid Similar to Parse Objects but checks predefined conditions only This does not check the WHERE clause of regular objects This will check if the cardinality has been defined for each join It will not detect the relationship between the tables This will detect any loops and inform you if they were resolved with an alias or context Designer will list any loops that have not been resolved When you start using contexts, you must ensure that all joins defined belong to a context The one exception is a shortcut join These do not need to belong to a context but will generate an integrity check error if they are not defined to one; you can ignore this error, as it does not cause a problem during query execution Ensures that the join cardinality (one to many, for example) has been set and is correct
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PART II
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Parse Objects
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TABLE 16-1 Settings to Check the Integrity of the Universe Components
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even if they produce an error during the integrity check, they still work correctly, as the shortcut join is used only when a user builds a query that involves only the two tables
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Checking as You Go
With the preceding two object errors, had you clicked Parse during the object modification, you also would have received an error Hence a very important lesson: unless you like solving many problems at once, check the universe integrity as you make modifications Designer allows you to set options that will force you to adhere to this practice These options are global for all universes you develop from this particular workstation From the pull-down menu, select Tools | Options and the General tab
Part II:
A Better Universe
In the Integrity box, set the option Automatic Parse Upon Definition to have Designer check the SQL syntax whenever you add or modify an object or join With this setting, you will not be able to add objects or joins that contain errors Designer will not warn you about isolated joins when you create them, but it will prevent you from adding joins that contain an incorrect SQL statement (for example, if you define a complex join and skip a parenthesis or join operator) While this setting is fairly fail-proof, it can be aggravating when you are creating a complex object with long SQL syntax and it doesn t allow you to leave the partial SQL statement Also, some readers of the first Complete Reference complained of intermittent problems parsing long DECODE statements against certain versions for Oracle, but I could not re-create this The second setting, Send Check Integrity Warning Before Export, will prompt you to do an integrity check prior to exporting the universe to the repository Designer prompts you to check the universe integrity prior to export:
16:
Getting Ready for Production
The last setting, Check Universe Integrity At Opening, forces an integrity check as soon as you open the universe While this is a useful reminder to resolve errors, I personally find it annoying when used in conjunction with the first two settings
Universe Documentation
Designer allows you to print a report to generate documentation on the universe To select what information gets included in a particular printout, use the pull-down menu to set Tools | Options | Print/PDF
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