示例#1
0
            internal CoreReaders(SegmentReader origInstance, Directory dir, SegmentInfo si, int readBufferSize, int termsIndexDivisor)
			{
				segment = si.name;
				this.readBufferSize = readBufferSize;
				this.dir = dir;
				
				bool success = false;
				
				try
				{
					Directory dir0 = dir;
					if (si.GetUseCompoundFile())
					{
						cfsReader = new CompoundFileReader(dir, segment + "." + IndexFileNames.COMPOUND_FILE_EXTENSION, readBufferSize);
						dir0 = cfsReader;
					}
					cfsDir = dir0;
					
					fieldInfos = new FieldInfos(cfsDir, segment + "." + IndexFileNames.FIELD_INFOS_EXTENSION);
					
					this.termsIndexDivisor = termsIndexDivisor;
					TermInfosReader reader = new TermInfosReader(cfsDir, segment, fieldInfos, readBufferSize, termsIndexDivisor);
					if (termsIndexDivisor == - 1)
					{
						tisNoIndex = reader;
					}
					else
					{
						tis = reader;
						tisNoIndex = null;
					}
					
					// make sure that all index files have been read or are kept open
					// so that if an index update removes them we'll still have them
					freqStream = cfsDir.OpenInput(segment + "." + IndexFileNames.FREQ_EXTENSION, readBufferSize);
					
					if (fieldInfos.HasProx())
					{
						proxStream = cfsDir.OpenInput(segment + "." + IndexFileNames.PROX_EXTENSION, readBufferSize);
					}
					else
					{
						proxStream = null;
					}
					success = true;
				}
				finally
				{
					if (!success)
					{
						DecRef();
					}
				}


                // Must assign this at the end -- if we hit an
                // exception above core, we don't want to attempt to
                // purge the FieldCache (will hit NPE because core is
                // not assigned yet).
                this.origInstance = origInstance;
			}