如何将EdgeNGramTokenFilter添加到指南针查询中?

问题描述

我正在使用指南针构建一些自动完成功能，我需要在指南针查询中添加 EdgeNGramTokenFilter ，但是我看不到如何添加它.

I am building some auto-complete functionality using compass and I need to add an EdgeNGramTokenFilter to the compass query but I cannot see how I can add it.

这可能吗?

推荐答案

我设法通过创建提供程序类来添加EdgeNGramTokenFilter过滤器，该提供程序类在compass.config.xml文件中添加了对它的引用，方法是在<searchEngine>标签

I managed to add the EdgeNGramTokenFilter filter by creating a provider class adding a reference to it in the compass.config.xml file by adding the following line within the <searchEngine> tags

<analyzerFilter name="lower" type="EdgeNGramTokenFilterProvider"/>

这是课程:

import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.ngram.EdgeNGramTokenFilter;
import org.apache.lucene.analysis.ngram.EdgeNGramTokenFilter.Side;
import org.compass.core.CompassException;
import org.compass.core.config.CompassSettings;
import org.compass.core.lucene.engine.analyzer.LuceneAnalyzerTokenFilterProvider;

public class EdgeNGramTokenFilterProvider implements LuceneAnalyzerTokenFilterProvider {

    public TokenStream createTokenFilter(TokenStream tokenStream) {
        return new EdgeNGramTokenFilter(tokenStream, Side.FRONT, 1, 20);
    }

    public void configure(CompassSettings settings) throws CompassException {
    }

}

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