ArrayIndexOutOfBoundsException when blocking with schema clusters

[saphyll]

I got the following error when I tried blocking with schema clusters:
java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 1 at org.scify.jedai.blockbuilding.AbstractBlockBuilding.lambda$parseIndex$10(AbstractBlockBuilding.java:167) at java.base/java.util.HashMap.forEach(HashMap.java:1336) at org.scify.jedai.blockbuilding.AbstractBlockBuilding.parseIndex(AbstractBlockBuilding.java:164) at org.scify.jedai.blockbuilding.AbstractBlockBuilding.readBlocks(AbstractBlockBuilding.java:196) at org.scify.jedai.blockbuilding.AbstractBlockBuilding.getBlocks(AbstractBlockBuilding.java:96) at org.scify.jedai.gui.utilities.WorkflowManager.runBlockBuilding(WorkflowManager.java:824) at org.scify.jedai.gui.utilities.WorkflowManager.runBlockingBasedWorkflow(WorkflowManager.java:896) at org.scify.jedai.gui.utilities.WorkflowManager.executeFullBlockingBasedWorkflow(WorkflowManager.java:393) at org.scify.jedai.gui.utilities.WorkflowManager.executeFullWorkflow(WorkflowManager.java:695) at org.scify.jedai.gui.controllers.steps.CompletedController.lambda$runAlgorithmBtnHandler$6(CompletedController.java:316) at java.base/java.lang.Thread.run(Thread.java:834)

There is a String split operation in the parseIndex function, that is not working properly:
final String[] entropyString = key.split(CLUSTER_SUFFIX);
The delimiters used in keyare equivalent to CLUSTER_PREFIX, not CLUSTER_SUFFIX, and they contain a dollar-sign that has to be escaped. I worked around the issue by changing the above line to
final String[] entropyString = key.split("#\\$!cl");

I'd suggest changing the values of the prefix and suffix to something that is compatible with regex - the solution above is less readable after all.

[gpapadis]

Thank you indeed for the recommendation. Schema clustering is work in progress, so there are likely to be more bugs in the code. If your data do not contain large, heterogeneous schemata, we recommend skipping Schema Clustering for the time being.