Class DuplicatePostProcessor

  • All Implemented Interfaces:
    PopulatorPostProcessor
    Direct Known Subclasses:
    ContextDuplicatePostProcessor

    @PerLookup
    public class DuplicatePostProcessor
    extends Object
    implements PopulatorPostProcessor
    This post-processor removes duplicate descriptors from the set of descriptors being added to the service registry.

    It is often the case when using a classpath that the same jar file can appear on the path more than once. For example this is often done when patching. However, if this jar contains HK2 descriptor files in it, that can mean duplicate services that are not intended to be duplicated. This service removes all duplicate descriptors from the set to be added to HK2

    Author:
    jwells
    • Constructor Detail

      • DuplicatePostProcessor

        public DuplicatePostProcessor()
        Creates a DuplicatePostProcessor with the STRICT mode for determining duplicates
      • DuplicatePostProcessor

        public DuplicatePostProcessor​(DuplicatePostProcessorMode mode)
        Creates a DuplicatePostProcessor with the
        Parameters:
        mode -
    • Method Detail

      • getMode

        public DuplicatePostProcessorMode getMode()
        Returns the mode of this DuplicatePostProcessorMode of this processor
        Returns:
        The mode
      • process

        public DescriptorImpl process​(ServiceLocator serviceLocator,
                                      DescriptorImpl descriptorImpl)
        Description copied from interface: PopulatorPostProcessor
        This method can be used to alter the descriptor read in. It can also add descriptors, or remove the descriptor (by returning null). Any alterations made to the descriptor passed in will remain in effect.
        Specified by:
        process in interface PopulatorPostProcessor
        Parameters:
        serviceLocator - the ServiceLocator being populated. Will not be null
        descriptorImpl - The descriptorImpl read from some external source. This processor can modify this descriptor fully
        Returns:
        The descriptor to be added to the system. If this returns null then the descriptorImpl passed in will NOT be added to the system. Implementations may return the descriptor passed in, but do not have to. The descriptor added to the system will be the one returned from this method