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Core of the Object/Lucene mapper, query engine and index management

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/*
 * Hibernate Search, full-text search for your domain model
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later
 * See the lgpl.txt file in the root directory or .
 */
package org.hibernate.search.analyzer.impl;

import org.apache.lucene.analysis.Analyzer;
import org.hibernate.search.util.impl.PassThroughAnalyzer;

/**
 * A reference to an {@link Analyzer}.
 *
 * @author Davide D'Alto
 */
public class LuceneAnalyzerReference implements AnalyzerReference {

	/**
	 * Analyzer that applies no operation whatsoever to the flux.
	 * This is useful for queries operating on non tokenized fields.
	 */
	public static final LuceneAnalyzerReference PASS_THROUGH = new LuceneAnalyzerReference( PassThroughAnalyzer.INSTANCE );

	private final Analyzer analyzer;

	public LuceneAnalyzerReference(Analyzer analyzer) {
		this.analyzer = analyzer;
	}

	public Analyzer getAnalyzer() {
		return analyzer;
	}

	@Override
	public void close() {
		analyzer.close();
	}

	@Override
	public  boolean is(Class analyzerType) {
		return LuceneAnalyzerReference.class.isAssignableFrom( analyzerType );
	}

	@Override
	@SuppressWarnings("unchecked")
	public  T unwrap(Class analyzerType) {
		return (T) this;
	}

	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder();
		sb.append( getClass().getSimpleName() );
		sb.append( "<" );
		sb.append( analyzer );
		sb.append( ">" );
		return sb.toString();
	}
}