hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/analyzer/JiebaAnalyzer.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.apache.hugegraph.analyzer;

import java.util.List;
import java.util.Set;

import org.apache.hugegraph.config.ConfigException;
import org.apache.hugegraph.util.InsertionOrderUtil;

import com.google.common.collect.ImmutableList;
import com.huaban.analysis.jieba.JiebaSegmenter;
import com.huaban.analysis.jieba.SegToken;

/**
 * Reference from https://github.com/huaban/jieba-analysis
 */
public class JiebaAnalyzer implements Analyzer {

    public static final List<String> SUPPORT_MODES = ImmutableList.of(
            "SEARCH",
            "INDEX"
    );

    private static final JiebaSegmenter JIEBA_SEGMENTER = new JiebaSegmenter();

    private final JiebaSegmenter.SegMode segMode;

    public JiebaAnalyzer(String mode) {
        if (!SUPPORT_MODES.contains(mode)) {
            throw new ConfigException(
                    "Unsupported segment mode '%s' for jieba analyzer, " +
                    "the available values are %s", mode, SUPPORT_MODES);
        }
        this.segMode = JiebaSegmenter.SegMode.valueOf(mode);
    }

    @Override
    public Set<String> segment(String text) {
        Set<String> result = InsertionOrderUtil.newSet();
        for (SegToken token : JIEBA_SEGMENTER.process(text, this.segMode)) {
            result.add(token.word);
        }
        return result;
    }
}