/*
* 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.mahout.text;
import com.google.common.base.Strings;
import org.apache.hadoop.io.Text;
import org.apache.lucene.document.Document;
import java.util.List;
import static org.apache.commons.lang.StringUtils.isNotBlank;
/**
*
*
**/
@Deprecated
class LuceneSeqFileHelper {
public static final String SEPARATOR_FIELDS = " ";
public static final int USE_TERM_INFOS = 1;
private LuceneSeqFileHelper() {}
public static void populateValues(Document document, Text theValue, List<String> fields) {
StringBuilder valueBuilder = new StringBuilder();
for (int i = 0; i < fields.size(); i++) {
String field = fields.get(i);
String fieldValue = document.get(field);
if (isNotBlank(fieldValue)) {
valueBuilder.append(fieldValue);
if (i != fields.size() - 1) {
valueBuilder.append(SEPARATOR_FIELDS);
}
}
}
theValue.set(Strings.nullToEmpty(valueBuilder.toString()));
}
}