package org.apache.lucene.index.codecs;
/**
* 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.
*/
import org.apache.lucene.index.FieldInfo;
import org.apache.lucene.index.Fields;
import org.apache.lucene.index.FieldsEnum;
import java.io.IOException;
import java.io.Closeable;
/** Abstract API that consumes terms, doc, freq, prox and
* payloads postings. Concrete implementations of this
* actually do "something" with the postings (write it into
* the index in a specific format).
*
* @lucene.experimental
*/
public abstract class FieldsConsumer implements Closeable {
/** Add a new field */
public abstract TermsConsumer addField(FieldInfo field) throws IOException;
/** Called when we are done adding everything. */
public abstract void close() throws IOException;
public void merge(MergeState mergeState, Fields fields) throws IOException {
FieldsEnum fieldsEnum = fields.iterator();
assert fieldsEnum != null;
String field;
while((field = fieldsEnum.next()) != null) {
mergeState.fieldInfo = mergeState.fieldInfos.fieldInfo(field);
final TermsConsumer termsConsumer = addField(mergeState.fieldInfo);
termsConsumer.merge(mergeState, fieldsEnum.terms());
}
}
}