RepositoryCopier has problems with multi-valued properties

When using the RepositoryCopier to backup and restore your repository you run into problems with multi-valued properties where you have only one value assigned.

The backup works fine but when you try to restore the backup and want to get the values of a multi-valued property you get:

java.lang.RuntimeException: property /ns:someNode/ns:multiValued is a single-valued property, so it's value can not be retrieved as an array
at org.apache.jackrabbit.core.PropertyImpl.internalGetValues(PropertyImpl.java:441)
at org.apache.jackrabbit.core.PropertyImpl.getValues(PropertyImpl.java:475)
at xxx.MyClass.getProperty(MyClass.java:274)

You can reproduce that by using the RepositoryCopier to copy your repository and then read it back again. You must have a node with a multi-valued property in it where you have only one value contained in the property to the time the backup is created.

The node type definition looks like:

// The namespace declaration
<ns='http://noPlaceLikeHome/'>
<nt='http://www.jcp.org/jcr/nt/1.0'>

// Node type name
[ns:myNodeType]

• ns:multiValued (string)
  multiple