在lucene中实现自定义前缀去除器令牌过滤器生成脏令牌

import org.apache.lucene.analysis.TokenFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;

public class PrefixRemoverTokenFilter extends TokenFilter {
    private final CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
    private final String prefix;

    protected PrefixRemoverTokenFilter(TokenStream input, String prefix) {
        super(input);
        this.prefix = prefix;
    }

    @Override
    public boolean incrementToken() throws IOException {
        if (input.incrementToken()) {
            String term = termAtt.toString();
            if (term.startsWith(prefix)) {
                // 生成脏令牌的逻辑可以在这里实现
                // 例如，我们可以简单地返回false来跳过这个令牌
                return false;
            }
            return true;
        }
        return false;
    }
}

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.core.WhitespaceTokenizer;

public class CustomAnalyzer extends Analyzer {
    private final String prefix;

    public CustomAnalyzer(String prefix) {
        this.prefix = prefix;
    }

    @Override
    protected TokenStreamComponents createComponents(String fieldName) {
        Tokenizer source = new WhitespaceTokenizer();
        TokenStream filter = new PrefixRemoverTokenFilter(source, prefix);
        return new TokenStreamComponents(source, filter);
    }
}