Can not get String array from Expandovalue with "Group of Text Values"

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.1.20 EE GA2, 6.1.30 EE GA3, 7.0.0 M3
• Fix Version/s: 6.1.X EE, 6.2.2 CE GA3 , 6.2.X EE, 7.0.0 M1
• Component/s: Portal Services, Portal Services > Expando
• Labels:
  • ee-ts
  • liferay-fixpack-platform-14-6130
  • liferay-fixpack-platform-9-6210
• Branch Version/s:
  6.2.x, 6.1.x
• Backported to Branch:
  Committed
• Story Points: 7
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/17023

When getting "Group of Text" type of ExpandoValue, I can not get a well-filled array of String, just a 1 length String array, in which the 0th elementh contains the all the values in one String.

EDITED:
I changed the string literal in the groovy script from dimension to length, because "dimension" can be misleading.

steps to reproduce

1. create a custom field (let the key name : "testkey") for Document Folders, type: Group of Text Values
2. create a Document Folder, fill in the "testkey" field with value of "A[ENTER]B[ENTER]C". (Where [ENTER] means press the Enter key)
3. check the "expandovalue" table, there should be a row there, where _data is similar to A B C
4. note the classPK and companyID values.
5. use the groovy script to get this field value, with the appropriate classPK and companyID values.
   • go to Server Administration, scripts
   • set Javascript to Groovy
   • copy paste the groovy script here into the textarea field
   • click on Execute

expected behaviour

The script output should be:

[A, B, C]
length:3

experienced behaviour

The script output is

[A, B, C]
length:1

the groovy script for testing

change classPK and companyID !

import com.liferay.portlet.expando.model.ExpandoValue;
import com.liferay.portlet.documentlibrary.model.DLFolder;
import com.liferay.portlet.expando.model.ExpandoTableConstants;
import com.liferay.portlet.expando.service.ExpandoValueLocalServiceUtil;
import java.util.Arrays;

classPK = 10469;
companyID = 10156;
expandoValue = ExpandoValueLocalServiceUtil.getData(companyID,DLFolder.class.getName(), ExpandoTableConstants.DEFAULT_TABLE_NAME, "testkey",classPK,new String [0]);

println(Arrays.toString(expandoValue));
println('length:' + expandoValue.length);