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{{content/}} |
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{{id name="fig_data_source"/}} |
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-{{figure image="data_source_en.png" }} |
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-Configuration screen for creating data sources: (1) list of existing data sources, (2) area for editing the selected data source, (3) settings panel of the data source, (4) servlet URL for accessing the data source. |
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-{{/figure}} |
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+{{figure image="data_source_en.png"}}Configuration screen for creating data sources: (1) list of existing data sources, (2) area for editing the selected data source, (3) settings panel of the data source, (4) servlet URL for accessing the data source.{{/figure}} |
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The sources or rather data sources are lodged as text in the format CSV, JSON or XML and can be worked up through the {{designer/}}/the form. |
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To have an access to data sources in the script area via javascript too, all data sources are converted into a JSON structure and customized in the object {{code}}XFC_METADATA.urls.datasource_[csv|json|xml]{{/code}}. The structure of this JSON structure for the different data sources is expounded in the respective section. |
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== CSV == |
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-Here you can insert data sets in the CSV format. |
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+{{figure image="data_source_csv_servlet_json_comparison.png"}} |
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+The JSON structure of a CSV data source. This JSON structure can be accessed through JavaScript via {{code}}XFC_METADATA.urls.datasource_csv{{/code}}. (1) On the left there is the JSON structure of the data source with out using the first row as a header. Instead the headers are of the form: {{code}}colX{{/code}}. (2) On the right there is the data source where the first row is being used as the header. |
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+{{/figure}} |
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-* Choose the option //CSV// under //type//. |
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-* Assign an explicit name. |
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-* Insert the data sperated with a comma in the arrey //value//. |
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+CSV data sources can be viewed in a source code view or in a table view. The view can be switched by clicking the appropriate button {{ficon name="table-large"/}}/{{icon name="code"/}} beneath the editing area. |
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-{{figure image="datenquelle_csv_8.png" width="300"}} |
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-The JSON structure of the CSV data source. To this JSON structure can only be accessed via {{code}}XFC_METADATA.urls.datasource_[csv|json|xml]{{/code}}. |
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-{{/figure}} |
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+//Source code view of a CSV data source//: ([[CSV file format>>https://en.wikipedia.org/wiki/Comma-separated_values||target="_blank"]]) |
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+{{lightbox image="data_source_csv_source.png" title="Source code view of a CSV data source"/}} |
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+//Table view of a CSV data source//: |
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+{{lightbox image="data_source_csv_table.png" title="Table view of a CSV data source"/}} |
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-=== Example for a CSV data source === |
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+=== Editing CSV tables === |
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-{{info}} |
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-The CSV data are converted to a JSON object internally, so that the first line of the //CSV data// always defines the object names for the later access. |
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-{{/info}} |
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+There is a row of buttons beneath the editing area for editing the CSV data table: |
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-{{code}} |
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-Value 1.1, value 1.2, value 1.3, value 1.4, ... |
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-{{/code}} |
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+* {{ficon name="plus-circle"/}} **Insert**: Inserts new rows or columns relative to the selected cell. |
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+* {{ficon name="trash-alt2"/}} **Remove**: Removes the selected row(s) or column(s) or empties the selected cell. |
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+* {{icon name="upload"/}} **Import**: Opens up the [[dialog for importing CSV data sources>>||anchor="data_source_import_csv"]]. |
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+* {{icon name="code"/}} **Source code view**: Switches to source code view. |
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-The readout of the values in the {{designer/}} ensues through the //servlet// with the namen //datenquellecsv//. |
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+=== Header of CSV data sources === |
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+There is an additional option for CSV data sources in the data source settings. The option **First row is header** determines how the values of the data sources are being accessed via its servlet ({{code}}XFC_METADATA.urls.datasource_csv{{/code}}): |
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+* **Aktiviert**: |
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+Die Zellen der erste Zeile werden als Schlüssel bzw. {{code}}keys{{/code}} für den Zugriff auf die Werte der jeweiligen Spalte verwendet (siehe [[Anwendungsbeispiel>>||anchor="data_source_csv_example"]]). |
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+* **Deaktiviert**: |
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+Die Schlüssel bzw. {{code}}keys{{/code}} für den Zugriff auf die Werte der einzelnen Datensätze/Zeilen sind durchnummeriert, beginnend mit {{code}}0{{/code}}. Diese Schlüssel haben folgende Form: {{code}}colX{{/code}}, wobei {{code}}X{{/code}} für den Index der Spalte steht. |
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+ |
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+{{lightbox image="data_source_csv_settings_de.png" title="Die Option **Erste Zeile ist Header** regelt den Zugriff auf die Werte der Datenquelle über das entsprechende Servlet"/}} |
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+ |
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+CSV-Datenquellen können im {{designer case="dat"/}} über das //Servlet// mit Namen {{code}}XFC_METADATA.urls.datasource_csv{{/code}} ausgelsen werden. |
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=== Servlet parameters === |
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{{info}} |