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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.engine.impl;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.hibernate.search.analyzer.spi.AnalyzerReference;
import org.hibernate.search.util.impl.Closeables;

/**
 * An immutable {@link AnalyzerRegistry}.
 *
 * @author Yoann Rodiere
 */
public class ImmutableAnalyzerRegistry implements AnalyzerRegistry {

	private final AnalyzerReference defaultReference;

	private final AnalyzerReference passThroughReference;

	private final Map referencesByName;

	private final Map, AnalyzerReference> referencesByClass;

	private final Collection scopedReferences;

	ImmutableAnalyzerRegistry(AnalyzerRegistry registryState) {
		this.defaultReference = registryState.getDefaultAnalyzerReference();
		this.passThroughReference = registryState.getPassThroughAnalyzerReference();
		this.referencesByName = Collections.unmodifiableMap( new HashMap<>( registryState.getNamedAnalyzerReferences() ) );
		this.referencesByClass = Collections.unmodifiableMap( new HashMap<>( registryState.getLuceneClassAnalyzerReferences() ) );
		this.scopedReferences = Collections.unmodifiableList( new ArrayList<>( registryState.getScopedAnalyzerReferences() ) );
	}

	@Override
	public AnalyzerReference getDefaultAnalyzerReference() {
		return defaultReference;
	}

	@Override
	public AnalyzerReference getPassThroughAnalyzerReference() {
		return passThroughReference;
	}

	@Override
	public Map getNamedAnalyzerReferences() {
		return referencesByName;
	}

	@Override
	public Map, AnalyzerReference> getLuceneClassAnalyzerReferences() {
		return referencesByClass;
	}

	@Override
	public Collection getScopedAnalyzerReferences() {
		return scopedReferences;
	}

	@Override
	public AnalyzerReference getAnalyzerReference(String name) {
		return referencesByName.get( name );
	}

	@Override
	public AnalyzerReference getAnalyzerReference(Class analyzerClazz) {
		return referencesByClass.get( analyzerClazz );
	}

	@Override
	public void close() {
		Closeables.closeQuietly( defaultReference );
		Closeables.closeQuietly( passThroughReference );
		Closeables.closeQuietly( referencesByName.values(), referencesByClass.values(),
				scopedReferences );
	}

}