Document functions

This section describes functions that operate on document values that are available in expressions.

getDocLength

Retrieves the file size of a document.

Syntax

    getDocLength(com.adobe.idp.Document)

Parameters

com.adobe.idp.Document is a reference to a serialized document.

Returns

A Long that contains the file size of the document in bytes. Returns 0 if the parameter does not evaluate to a document.

Example

A variable named vardocument references a PDF file that was serialized after being submitted as a work item form. The following example returns 455343, the size of the referenced document in bytes:

getDocLength(/process_data/@vardocument)

getDocAttribute

Retrieves the value of the specified document attribute.

Syntax

    getDocAttribute(com.adobe.idp.Document, String)

Parameters

com.adobe.idp.Document is a reference to a serialized document. String is a string that holds the name of the document attribute to retrieve. For information about available attributes, see Document attributes for attachments and notes.

Returns

The value of the attribute specified by String. The attribute determines the type of value returned. Returns an empty string if the com.adobe.idp.Document parameter does not evaluate to a com.adobe.idp.Document value. Returns null if String does not hold a valid attribute name.

Example

A document variable named varattachment references a PDF file that was attached to a task. The following example returns an integer that represents the access permissions of the attachment:

getDocAttribute(/process_data/@varattachment,"wspermission")

setDocAttribute

Sets the value of a document attribute.

Syntax

    setDocAttribute(com.adobe.idp.Document, String, String)

Parameters

com.adobe.idp.Document is a reference to a serialized document. The first String parameter is a string that holds the name of the document attribute to set. The second String parameter is a string that holds the value to set the document attribute to. For information about available attributes, see Document attributes for attachments and notes.

Returns

A reference to the input com.adobe.idp.Document value with the attribute specified by the first String parameter set to the value specified by the second String parameter.

Returns a reference to an empty com.adobe.idp.Document value with the specified attribute set to the specified value if the first parameter does not evaluate to a document.

Returns a reference to the unchanged com.adobe.idp.Document value if the second or third parameters do not evaluate to a String.

Example

The following example returns the description of a document that the document variable named vardoc1 references:

setDocAttribute(/process_data/@vardoc1,"wsdescription",  
"An example description.")

getDocContentType

Retrieves the content type of a document. The content type identifies the type of the document, similar to the mime-type property of documents that are sent over the web. For example, a PDF document has a document type of application/pdf.

The document type of a document can have no value or can have any value that is set with the setDocContent function, when the document was attached to a task. For more information, see setDocContentType.

Syntax

    getDocContentType(com.adobe.idp.Document)

Parameters

com.adobe.idp.Document is a serialized document that is referenced by a document variable.

Returns

A String that contains the content type. Returns an empty String if the parameter does not evaluate to a document.

setDocContentType

Sets the content type of a document. The content type identifies the type of the document, similar to the mime-type property of documents that are sent over the web. For example, a PDF document has a document type of application/pdf.

Syntax

    setDocContentType(com.adobe.idp.Document, String)

Parameters

com.adobe.idp.Document is a serialized document that is referenced by a document variable.

String is a string that contains the content type that you want to set for the document.

Returns

A reference to a copy of the com.adobe.idp.Document value that was used as a parameter. Returns a new, empty document with the specified content type if the first parameter does not evaluate to a com.adobe.idp.Document.

getDocContentBase64

Retrieves the content of a document as a Base64-encoded string.

Syntax

    getDocContentBase64(aDocument)

Parameters

aDocument is a serialized document value. You can reference the document value using an XPath expression.

Returns

A string value that represents the document. If the parameter does not evaluate to a document value, an empty string is returned.

Example

A text file is stored in a document variable named documentVar. The content of the text file is the single word content. The following expression returns the string value Y29udGVudA==:

getDocConententBase64(/process_data/@documentVar)

getDocFromBase64

Converts a Base64-encoded string to a document.

Syntax

    getDocFromBase64(aString)

Parameters

aString is a string value that contains Base64-encoded text. You can reference the string value using an XPath expression.

Returns

A document value that represents a document, and the content of the document is the decoded text that aString contained.

Example

A string variable named stringVar contains the Base64-encoded text Y29udGVudA==. The following expression returns a document that contains the text content:

getDocFromBase64(/process_data/@stringVar)