PostContextifier.java

/*
 * 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.tallison.lucene.syns.contextifiers;

public class PostContextifier implements Contextifier {
    private final static String FIELD = "post";

    @Override
    public String convert(String s, int cnt) {
        int i = s.lastIndexOf("_");
        if (i > -1 && i + 1 < s.length()) {
            StringBuilder sb = new StringBuilder();
            sb.append(s.substring(0, i));
            sb.append(START_MARKER);
            sb.append(FIELD);
            sb.append(FIELD_MARKER);
            sb.append(s.substring(i + 1));
            sb.append(COUNT_MARKER);
            sb.append(cnt);
            return sb.toString();
        }
        return null;
    }

}