Package org.apache.lucene.index.pruning

Class StorePruningPolicy

  • public class StorePruningPolicy
extends PruningPolicy
    Pruning policy for removing stored fields from documents.

    • Field Detail

      • fieldFlags

        protected Map<String,​Integer> fieldFlags
        Pruning in effect for each field

      • deleteAll

        protected Set<String> deleteAll
        Fields to be completely deleted

      • fs

        protected org.apache.lucene.index.pruning.StorePruningPolicy.DelFieldSelector fs

      • delFields

        protected int delFields

    • Constructor Detail

      • StorePruningPolicy

        public StorePruningPolicy​(IndexReader in,
                          Map<String,​Integer> fieldFlags)
        Constructs a policy.
        Parameters:
        in - input reader.
        fieldFlags - a map where keys are field names, and flags are bitwise-OR values of flags defined in PruningPolicy.

    • Method Detail

      • getFieldInfos

        public FieldInfos getFieldInfos​(FieldInfos allInfos)
        Compute field infos that should be retained
        Parameters:
        allInfos - original field infos
        Returns:
        those of the original field infos which should not be removed.

      • pruneDocument

        public Document pruneDocument​(int doc,
                              FieldSelector parent)
                       throws IOException
        Prune stored fields of a document. Note that you can also arbitrarily change values of the retrieved fields, so long as the field names belong to a list of fields returned from getFieldInfos(FieldInfos).
        Parameters:
        doc - document number
        parent - original field selector that limits what fields will be retrieved.
        Returns:
        a pruned instance of a Document.
        Throws:
        IOException