Grails 中的重音不敏感搜索

发布于 2024-12-06 00:16:56 字数 99 浏览 0 评论 0原文

如何使用 Grails Searchable Plugin 不区分重音进行全文搜索？

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栀子花开つ 2024-12-13 00:16:56

我在 Peter Ledbrook 的帖子，但是需要付出一些努力：

由于最新的可搜索插件使用 Lucene 2.4.1，它不包含 ASCIIFoldingFilter（自 2.9.0 起可用）和 ISOLatin1AccentFilter 不支持许多语言我为剥离重音：



    import java.text.Normalizer
    import org.apache.lucene.analysis.Token
    import org.apache.lucene.analysis.TokenFilter
    import org.apache.lucene.analysis.TokenStream

    class StripAccentsFilter extends TokenFilter {

        StripAccentsFilter(TokenStream input)   {
            super(input)
        }

        public final Token next(Token reusableToken) {

            assert reusableToken

            Token nextToken = input.next(reusableToken)
            if (nextToken) {
                nextToken.setTermBuffer(Normalizer.normalize(nextToken.termBuffer() as String, Normalizer.Form.NFD)
                        .replaceAll("\\p{InCombiningDiacriticalMarks}+", ""))
                return nextToken
            }
            return null
        }
    }

以及相应的过滤器提供程序：



    import org.apache.lucene.analysis.TokenStream
    import org.compass.core.config.CompassSettings
    import org.compass.core.lucene.engine.analyzer.LuceneAnalyzerTokenFilterProvider

    class StripAccentsFilterProvider implements LuceneAnalyzerTokenFilterProvider {

        public void configure(CompassSettings paramCompassSettings) {
        }

        public TokenStream createTokenFilter(TokenStream paramTokenStream) {
            return new StripAccentsFilter(paramTokenStream)
        }

    }

现在您需要做的就是在可搜索插件的配置中注册此过滤器提供程序（grails-app/conf/Searchable.groovy）：

compassSettings = [
    'compass.engine.analyzer.default.filters': 'stripAccents',
    'compass.engine.analyzer.search.filters': 'stripAccents',
    'compass.engine.analyzerfilter.stripAccents.type': 'StripAccentsFilterProvider' 
]

I have solved this problem with help of Peter Ledbrook's post, however some effort was needed:

Since latest searchable plugin uses Lucene 2.4.1 which does not contain ASCIIFoldingFilter (available since 2.9.0) and ISOLatin1AccentFilter doesn't support many languages I have created custom filter for stripping accents:



    import java.text.Normalizer
    import org.apache.lucene.analysis.Token
    import org.apache.lucene.analysis.TokenFilter
    import org.apache.lucene.analysis.TokenStream

    class StripAccentsFilter extends TokenFilter {

        StripAccentsFilter(TokenStream input)   {
            super(input)
        }

        public final Token next(Token reusableToken) {

            assert reusableToken

            Token nextToken = input.next(reusableToken)
            if (nextToken) {
                nextToken.setTermBuffer(Normalizer.normalize(nextToken.termBuffer() as String, Normalizer.Form.NFD)
                        .replaceAll("\\p{InCombiningDiacriticalMarks}+", ""))
                return nextToken
            }
            return null
        }
    }

and corresponding filter provider:



    import org.apache.lucene.analysis.TokenStream
    import org.compass.core.config.CompassSettings
    import org.compass.core.lucene.engine.analyzer.LuceneAnalyzerTokenFilterProvider

    class StripAccentsFilterProvider implements LuceneAnalyzerTokenFilterProvider {

        public void configure(CompassSettings paramCompassSettings) {
        }

        public TokenStream createTokenFilter(TokenStream paramTokenStream) {
            return new StripAccentsFilter(paramTokenStream)
        }

    }

Now all you need to do is to register this filter provider in configuration of searchable plugin (grails-app/conf/Searchable.groovy):

compassSettings = [
    'compass.engine.analyzer.default.filters': 'stripAccents',
    'compass.engine.analyzer.search.filters': 'stripAccents',
    'compass.engine.analyzerfilter.stripAccents.type': 'StripAccentsFilterProvider' 
]

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