Features Overview

Features Overview

GroupDocs.Assembly for Java is an API that allows you to generate documents in popular office and email file formats based upon template documents and data obtained from various sources including databases, XML, JSON, OData and more. The following is the list of salient features which are offered by the GroupDocs.Assembly API:

  • Multiple data formats support
  • Use formulae & perform sequential data operations
  • Apply upper, lower, capital, firstcap formatting to strings in template syntax
  • Template syntax support formatting of ordinal, cardinal, alphabetic numeric nature
  • Support template documents with custom variables & text comments within template syntax tags
  • Dynamically insert out document content in report
  • Dynamically configure background color of html documents & generate barcode in reports
  • Dynamically insert hyperlinks in reports & apply attributes to email message body
  • Dynamically attach email attachments
  • Support of next field analogue of Microsoft Word
  • Update fields during word processing document assembly
  • Apply formula during spreadsheet assembly
  • Template formatting for numeric, text, image, date-time, chart elements
  • Conditional formatting of template text elements
  • Linq-based template syntax
  • Change format of assembled file using explicit specifications or file extension
  • Auto-removal of empty paragraphs
  • Generate various report types, e.g., charts, image, tables, lists and more
  • Inline template syntax errors in generated documents instead of exception throwing.
  • Load template documents from html with resources and save assembled Word, Excel, PowerPoint & emails to html with resources

Following is the detail given about how the features are offered with their usage and limits.

Data Sources

Data Formats

FeatureSupport in GroupDocs.Assembly for Java
DatabaseSupported (using DataSet, DataTable, etc.)
XMLSupported (using DataSet.ReadXml or XML deserialization of custom objects)
ODataSupported (using deserialization of custom objects through WCF or third-party Java libraries)
JSONSupported (using a third-party component like JsonJava on DataSet or custom objects in Java)
Custom Java ObjectsSupported
Ability to use Spreadsheet as Table of DataSupported
Ability to use Word processing Table as Table of DataSupported

Data Manipulation Capabilities

FeatureSupport in GroupDocs.Assembly for Java
Sequential Data Operations (filtering, ordering, grouping, aggregating, etc.)Supported (through LINQ syntax for data sources of all types, LINQ extension method analogues are named using lower camel case)
Type Member InvocationSupported
Built-In Data Relation SupportSupported
Data Processing CustomizationSupported (using external Java types)
External Document ImportSupported

Explicit Support for Multiple Data Sources

A new overload DocumentAssembler.AssembleDocument is added in the new release. Using this overload user can reference multiple data source objects and their members in the template. Overload accepts an array of data source names and an array of data sources. Learn more about support of multiple data sources in this article.

Template Formats, Elements and Syntax

Template Document Formats

Word Processing Document Formats

Word Processing Document formats including Microsoft Word Document and OpenOffice document formats are supported. For more details, please visit Support for Word Processing Document Formats.

Spreadsheet Document Formats

Spreadsheet Document formats including Microsoft Excel Workbook and OpenOffice spreadsheet document formats are supported. For more details, please visit Support for Spreadsheet Document Formats.

Presentation Document Formats

Presentation Document formats including Microsoft PowerPoint Presentation and OpenOffice presentation document formats are supported. For more details, please visit Support for Presentation Document Formats.

More Document Formats

More Document formats including Email, PDF, HTML, Plain Text, Epub and XPS document formats will be supported in the future releases. For more details, please visit Support for more Document Formats.

Dynamic Merging of Table Cells

You can merge table cells with equal textual contents within your reports dynamically using cellMerge tag. For the detail, please visit Merging Table Cells Dynamically.

Textual Comments within Template Syntax Tags

An optional comment providing a human-readable explanation ignored by the engine

<<tag_name [expression] switch1 switch2 ... // optional_comment >>

In-lining of Syntax Error Messages into Templates 

In-lining of syntax error messages into templates instead of exception throwing. For the detail, please visit Use of In-line Syntax Error Messages into Templates.

Template Elements

FeatureSupport in GroupDocs.Assembly for Java
Formatted Text BlocksSupported
HTML BlocksSupported
Repeated Blocks (including list items and table rows)Supported
Conditional BlocksSupported (including list items and table rows)
Pivot TablesTo be supported
Barcodes (through barcode fonts)Supported
Bound Form ControlsTo be supported
Hyperlinks to URI or BookmarksSupported

Template Syntax Formats for Expression Results

Specifying String Formats

API provides a useful feature to format strings in template syntax. String formatting such as upper, lower, capital, etc.

String FormatDescription
lowerConverts a string to lower case (“the string”)
upperConverts a string to upper case (“THE STRING”)
capsCapitalizes a first letter of every word in a string (“The String”)
firstCapCapitalizes the first letter of the first word in a string (“The string”)

Specifying Numeric Formats

Using GroupDocs.Assembly for Java user can also do numeric formatting in template syntax. Numeric formatting such as ordinal, cardinal, alphabetic, etc.

Number FormatDescription
alphabeticFormats an integer number as an upper-case letter (A, B, C, …)
romanFormats an integer number as an upper-case Roman numeral (I, II, III, …)
ordinalAppends an ordinal suffix to an integer number (1st, 2nd, 3rd, …)
ordinalTextConverts an integer number to its ordinal text representation (First, Second, Third, …)
cardinalConverts an integer number to its text representation (One, Two, Three, …)
hexFormats an integer number as hexadecimal (8, 9, A, B, C, D, E, F, 10, 11, …)
arabicDashEncloses an integer number with dashes (- 1 -, - 2 -, - 3 -, …)

Variables in Template Documents

API permits users to define variables in template documents as follows:

<<var [st = "Hello, "]>><<[st]>><<var[st = "World!"]>><<[st]>>

Support for Outer Document Insertion

You can insert contents of outer documents to your reports dynamically.

Barcode Image Generation

Barcode images can be generated in reports dynamically.

Support for Analogue of Microsoft Word NEXT Field

This feature allows user to implement a new «next» tag. The tag should be supported only within data bands created by using «foreach» tag.

Setting Background Color Dynamically

For HTML documents, a background color can not be set dynamically using the backColor tag

<<backColor ["red"]>>text with red background<</backColor>>

Aside this, you can use the HTML style attribute to achieve this. 

Inserting Images Dynamically

You can insert images to your reports dynamically using image tags.

<<image [image_expression]>>

Ability to Update Fields

API permits users to update fields while assembling Word Processing documents.

Ability to Calculate Formulas

API allows users to calculate formula while assembling Spreadsheet documents.

Template Elements Formatting

FeatureSupport in GroupDocs.Assembly for Java
Numeric/Date-Time Value FormattingSupported
Text FormattingSupported
Conditional Text FormattingSupported (only through conditional blocks)
Image FormattingSupported (WYSIWYG)
Chart FormattingSupported (WYSIWYG)

Template Syntax

FeatureSupport in GroupDocs.Assembly for Java
LINQ-BasedSupported, LINQ extension method analogues are named using lower camel case
MustacheTo be supported

Changing Output File Format 

GroupDocs.Assembly provides a powerful feature to change the target file format of an assembled document using file extension or explicit specification.

Loading HTML and Saving To HTML with External Resource Files

Load template documents from html with resources and save assembled Word, Excel, PowerPoint & emails to html with resources. Please visit the following articles for the detail:

Numbering Restart in Nested Numbered List 

The GroupDocs.Assembly engine allows restart list numbering within your documents dynamically using «restartNum» tags. In particular, this feature is useful when working with a nested numbered list within a data band. Please visit this article for more details

Metered Licensing

The GroupDocs.Assembly.Metered public class has been added to provide metered licensing.

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