Attempting to set the blacklistedDigests or blacklistedSignatureMethods properties on an XMLSignatureValidationStage bean from a Spring configuration fails, with Spring claiming the property is not writable. It isn't specific about why.
Some investigation leads me to believe that this is a bug in the version of Spring that we shipped with the 0.8.0 release (3.2.2.RELEASE) as it goes away in the latest stable version of Spring (3.2.5.RELEASE).
One workround is to remove the older Spring JAR files from one's install and replace them with the latest version.
I am going to try and reproduce this in a less complex context, and establish a unit test. This probably needs to be in aggregator-cli, as aggregator-pipeline itself is not dependent on Spring (the bean itself is functional).