Class SlowCompositeCodecReaderWrapper

  • All Implemented Interfaces:
    java.io.Closeable, java.lang.AutoCloseable

    final class SlowCompositeCodecReaderWrapper
    extends CodecReader
    A merged CodecReader view of multiple CodecReader. This view is primarily targeted at merging, not searching.
    • Field Detail

      • codecReaders

        private final CodecReader[] codecReaders
      • docStarts

        private final int[] docStarts
      • liveDocs

        private final Bits liveDocs
      • numDocs

        int numDocs
    • Constructor Detail

      • SlowCompositeCodecReaderWrapper

        private SlowCompositeCodecReaderWrapper​(java.util.List<CodecReader> codecReaders)
                                         throws java.io.IOException
        Throws:
        java.io.IOException
    • Method Detail

      • wrap

        static CodecReader wrap​(java.util.List<CodecReader> readers)
                         throws java.io.IOException
        Throws:
        java.io.IOException
      • docIdToReaderId

        private int docIdToReaderId​(int doc)
      • getCoreCacheHelper

        public IndexReader.CacheHelper getCoreCacheHelper()
        Description copied from class: LeafReader
        Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this leaf regardless of deletions. Two readers that have the same data but different sets of deleted documents or doc values updates may be considered equal. Consider using IndexReader.getReaderCacheHelper() if you need deletions or dv updates to be taken into account.

        A return value of null indicates that this reader is not suited for caching, which is typically the case for short-lived wrappers that alter the content of the wrapped leaf reader.

        Specified by:
        getCoreCacheHelper in class LeafReader
      • getFieldInfos

        public FieldInfos getFieldInfos()
        Description copied from class: LeafReader
        Get the FieldInfos describing all fields in this reader.

        Note: Implementations should cache the FieldInfos instance returned by this method such that subsequent calls to this method return the same instance.

        Specified by:
        getFieldInfos in class LeafReader
      • getLiveDocs

        public Bits getLiveDocs()
        Description copied from class: LeafReader
        Returns the Bits representing live (not deleted) docs. A set bit indicates the doc ID has not been deleted. If this method returns null it means there are no deleted documents (all documents are live).

        The returned instance has been safely published for use by multiple threads without additional synchronization.

        Specified by:
        getLiveDocs in class LeafReader
      • numDocs

        public int numDocs()
        Description copied from class: IndexReader
        Returns the number of documents in this index.

        NOTE: This operation may run in O(maxDoc). Implementations that can't return this number in constant-time should cache it.

        Specified by:
        numDocs in class IndexReader
      • maxDoc

        public int maxDoc()
        Description copied from class: IndexReader
        Returns one greater than the largest possible document number. This may be used to, e.g., determine how big to allocate an array which will have an element for every document number in an index.
        Specified by:
        maxDoc in class IndexReader
      • getReaderCacheHelper

        public IndexReader.CacheHelper getReaderCacheHelper()
        Description copied from class: IndexReader
        Optional method: Return a IndexReader.CacheHelper that can be used to cache based on the content of this reader. Two readers that have different data or different sets of deleted documents will be considered different.

        A return value of null indicates that this reader is not suited for caching, which is typically the case for short-lived wrappers that alter the content of the wrapped reader.

        Specified by:
        getReaderCacheHelper in class IndexReader