Invoice Template For Libreoffice Invoice Template For Libreoffice Is So Famous, But Why?

If you accept acquaintance of business appliance development, again best acceptable you will accept encountered a claim for the appliance to accept a adjustable advertisement mechanism. The aggregation I assignment for is mainly focused on developing business solutions and advertisement is an essential, indeed, charge accept aspect of all the action systems we develop. To accredit adjustable advertisement in our systems, we accept developed our own open-source (distributed beneath Apache 2.0 license) abode architect – YARG (Yet Addition Abode Generator). Now YARG is a affection of the advertisement in the CUBA belvedere – which itself is the base of all the systems we develop.



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First of all, let me acknowledgment that we are not caster reinventors. We are consistently attractive for solutions to accommodate with, as continued as those solutions fit us. Unfortunately, in this case we couldn’t acquisition any accessible antecedent apparatus that met the afterward requirements we identified:

The abutting apparatus we could acquisition was JasperReports, but there were a few blockers which chock-full us from appliance it:

Of advance we researched lots of added altered tools, but all added libraries we begin were focused on some specific format. We capital to accept a catholicon for advertisement – one apparatus for all affectionate of reports.



Taking in appliance all the credibility and thoughts listed above, we absitively to advance another, but bespoke apparatus for abode generation.

When we started YARG it was not a botheration to acquisition a library for XLS affiliation (POI-HSSF, JXLS, etc.). We absitively to go for Apache POI as the best accepted and able-bodied accurate library.

The bearings about DOC affiliation was absolutely the opposite. Alone a actual few options were accessible in the open-source bazaar (POI-HWPF, COM and UNO Runtime). The POI-HWPF library was actual bound in a cardinal of means and we did not accede it as a acceptable option. We had to accept amid COM and UNO Runtime, which is actually an API for the OpenOffice server ancillary integration.

So, afterwards abysmal analysis we absitively to aces UNO Runtime, mainly because of the absolute acknowledgment from bodies who auspiciously active it for systems coded in absolutely altered languages, such as Python, Ruby, C#, etc.

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While use of POI-HSSF was absolutely aboveboard (except of charting), we faced a cardinal of challenges amalgam UNO Runtime:

Later on, back the DOCX4J library became actual complete and popular, we accurate XLSX/DOCX. The capital advantage of the DOCX4J library is that it provides the all-important low akin admission to the certificate anatomy (basically, you accomplish with XML). Addition account of appliance DOCX4J is that it doesn’t crave OpenOffice server affiliation for DOCX letters generation.

Also, there is an adeptness to use certificate with Freemarker markup as a abode template. We usually use it to accomplish actual custom letters as HTML and again catechumen the aftereffect to PDF.

Finally, YARG basement is developed in an extendable way, so that accomplished users can apparatus affiliation with any added arrangement blazon by themselves.

Let’s get to apperceive YARG. The capital abstraction of the abode architect is to breach out the abstracts bandage and presentation layer. The Abstracts Bandage enables scripting or absolute SQL querying to back the adapted advice and the presentation bandage represents the markup of the fetched data.

All YARG letters abide of alleged ‘Bands’. A Bandage is commodity that links up abstracts and presentation layers together. So, every bandage knows area to get the abstracts from and area it is placed in the template.

For example, we appetite to book out all our advisers to an Excel spreadsheet. We will charge to actualize the ‘Staff’ bandage and ascertain an SQL concern to back the account of the employees:

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The alone affair larboard is to actualize the XLS template:

Here we go! Aloof run the affairs and adore the result!

Let’s accept we accept a arrangement of bookshops. There is a charge to accomplish an XLS abode assuming the account of awash books, with advertence to the bookshop area the books were sold. Moreover, we don’t accept a Java developer, alone a arrangement ambassador with the basal accomplishment set of XML and SQL.

First of all we charge to actualize an XLS arrangement for the report:

As you can see, we ascertain two called regions (corresponding to the bands): for shops (in blue) and for book instances (in white).

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Now we accept to back appropriate abstracts from the database:

Finally, we acknowledge the bands anatomy of the abode appliance XML:

Let’s barrage the abode and accept a attending at the aftereffect (how to run a abode is declared beneath in Standalone section):

This use case shows that you can accept a advertence to the ancestor band: book.store_id = ${Shop.id}. This accustomed us to clarify the books awash by anniversary accurate bookshop.

Let’s now actualize an balance report. We will actualize a DOCX certificate and again catechumen to the abiding anatomy – PDF document. To allegorize addition way of how to amount data, we will use Groovy script, instead of the absolute SQL query:

As you may accept noticed, Groovy calligraphy allotment List<Map<String, Object>> object. So, anniversary account is represented as a Key (parameter name) and Amount (parameter value).

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As a finishing blow we will charge to actualize a DOCX template:

To articulation the basal table to the account of of books we use ##band=Items marker.

After the abode is generated we get the afterward output:

As mentioned before, one of the requirements was to accommodate an adeptness to accommodate into IoC frameworks (Spring, Guice). We use YARG as a allotment of the able advertisement agent in the CUBA belvedere – our aerial akin Java  framework for action applications development. CUBA employs Spring as IoC mechanism, let’s accept a attending how YARG is chip into the platform:

In adjustment to accommodate YARG into Spring Framework the afterward beans should be registered:

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As you can see YARG can be calmly anchored aural your application.

Another admired affection of YARG, is that it can be acclimated as a standalone application. Technically, if you accept JRE installed, you can run the abode architect from the command prompt. For instance, if you accept a server ancillary PHP appliance and appetite to accredit advertisement in your application, again aloof actualize an XLS template, acknowledge the abode anatomy in XML and barrage YARG from the command prompt:

YARG is acutely chip into the CUBA belvedere and acts as the amount agent for the able advertisement apparatus implemented in the platform.

First of all, you can bury the advertisement in one bang appliance the CUBA Studio (read-only audience adaptation is accessible here):

CUBA offers acceptable user interface for letters management:

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To achieve the commodity let me skip accepted arid abysmal thoughts (especially because all the advice can be begin here) and bandy in a brace of my favourite reports:

So, if you are absorbed chase the articulation and apprentice more! Note that YARG is absolutely chargeless and accessible on GitHub.

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