Example usage for org.apache.lucene.search MultiTermQuery MultiTermQuery

Introduction

In this page you can find the example usage for org.apache.lucene.search MultiTermQuery MultiTermQuery.

Prototype

MultiTermQuery

Source Link

Usage

From source file:org.exoplatform.services.jcr.impl.core.query.lucene.WildcardQuery.java

License:Apache License

/**
 * Either rewrites this query to a lucene MultiTermQuery or in case of
 * a TooManyClauses exception to a custom jackrabbit query implementation
 * that uses a BitSet to collect all hits.
 *
 * @param reader the index reader to use for the search.
 * @return the rewritten query.//from w ww.ja v a 2s . c om
 * @throws IOException if an error occurs while reading from the index.
 */
@Override
public Query rewrite(IndexReader reader) throws IOException {
    Query stdWildcardQuery = new MultiTermQuery() {
        @Override
        protected FilteredTermEnum getEnum(IndexReader reader) throws IOException {
            return new WildcardTermEnum(reader, field, propName, pattern, transform);
        }

        /** Prints a user-readable version of this query. */
        @Override
        public String toString(String field) {
            StringBuffer buffer = new StringBuffer();
            buffer.append(field);
            buffer.append(':');
            buffer.append(ToStringUtils.boost(getBoost()));
            return buffer.toString();
        }
    };
    try {
        multiTermQuery = stdWildcardQuery.rewrite(reader);
        return multiTermQuery;
    } catch (BooleanQuery.TooManyClauses e) {
        // MultiTermQuery not possible
        log.debug("Too many terms to enumerate, using custom WildcardQuery.");
        return this;
    }
}

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