| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.lucene.codecs.uniformsplit.sharedterms; |
| |
| import org.apache.lucene.codecs.uniformsplit.FieldMetadata; |
| import org.apache.lucene.util.BytesRef; |
| |
| /** |
| * Builds a {@link FieldMetadata} that is the union of multiple {@link FieldMetadata}. |
| * |
| * @lucene.experimental |
| */ |
| public class UnionFieldMetadataBuilder { |
| |
| private long dictionaryStartFP; |
| private long minStartBlockFP; |
| private long maxEndBlockFP; |
| private BytesRef maxLastTerm; |
| |
| public UnionFieldMetadataBuilder() { |
| dictionaryStartFP = -1; |
| minStartBlockFP = Long.MAX_VALUE; |
| maxEndBlockFP = Long.MIN_VALUE; |
| } |
| |
| public UnionFieldMetadataBuilder addFieldMetadata(FieldMetadata fieldMetadata) { |
| assert dictionaryStartFP == -1 || dictionaryStartFP == fieldMetadata.getDictionaryStartFP(); |
| dictionaryStartFP = fieldMetadata.getDictionaryStartFP(); |
| minStartBlockFP = Math.min(minStartBlockFP, fieldMetadata.getFirstBlockStartFP()); |
| maxEndBlockFP = Math.max(maxEndBlockFP, fieldMetadata.getLastBlockStartFP()); |
| if (maxLastTerm == null || maxLastTerm.compareTo(fieldMetadata.getLastTerm()) < 0) { |
| maxLastTerm = fieldMetadata.getLastTerm(); |
| } |
| return this; |
| } |
| |
| public FieldMetadata build() { |
| if (maxLastTerm == null) { |
| throw new IllegalStateException("no field metadata was provided"); |
| } |
| return new FieldMetadata(dictionaryStartFP, minStartBlockFP, maxEndBlockFP, maxLastTerm); |
| } |
| } |