/*
 * 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 <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.search.elasticsearch.analyzer.impl;

import java.util.Collections;
import java.util.Map;
import java.util.TreeMap;

import org.hibernate.search.elasticsearch.logging.impl.Log;
import org.hibernate.search.elasticsearch.settings.impl.model.AnalyzerDefinition;
import org.hibernate.search.elasticsearch.settings.impl.model.CharFilterDefinition;
import org.hibernate.search.elasticsearch.settings.impl.model.TokenFilterDefinition;
import org.hibernate.search.elasticsearch.settings.impl.model.TokenizerDefinition;
import org.hibernate.search.util.logging.impl.LoggerFactory;

/**
 * A simple implementation of {@link ElasticsearchAnalysisDefinitionRegistry}.
 * <p>
 * This class also provides access to the mapping from full names to definitions.
 *
 * @author Yoann Rodiere
 */
public final class SimpleElasticsearchAnalysisDefinitionRegistry implements ElasticsearchAnalysisDefinitionRegistry {

	private static final Log LOG = LoggerFactory.make( Log.class );

	private final Map<String, AnalyzerDefinition> analyzerDefinitions = new TreeMap<>();
	private final Map<String, TokenizerDefinition> tokenizerDefinitions = new TreeMap<>();
	private final Map<String, TokenFilterDefinition> tokenFilterDefinitions = new TreeMap<>();
	private final Map<String, CharFilterDefinition> charFilterDefinitions = new TreeMap<>();

	@Override
	public void register(String name, AnalyzerDefinition definition) {
		AnalyzerDefinition previous = analyzerDefinitions.putIfAbsent( name, definition );
		if ( previous != null && previous != definition ) {
			throw LOG.analyzerNamingConflict( name );
		}
	}

	@Override
	public void register(String name, TokenizerDefinition definition) {
		TokenizerDefinition previous = tokenizerDefinitions.putIfAbsent( name, definition );
		if ( previous != null && previous != definition ) {
			throw LOG.tokenizerNamingConflict( name );
		}
	}

	@Override
	public void register(String name, TokenFilterDefinition definition) {
		TokenFilterDefinition previous = tokenFilterDefinitions.putIfAbsent( name, definition );
		if ( previous != null && previous != definition ) {
			throw LOG.tokenFilterNamingConflict( name );
		}
	}

	@Override
	public void register(String name, CharFilterDefinition definition) {
		CharFilterDefinition previous = charFilterDefinitions.putIfAbsent( name, definition );
		if ( previous != null && previous != definition ) {
			throw LOG.charFilterNamingConflict( name );
		}
	}

	@Override
	public AnalyzerDefinition getAnalyzerDefinition(String name) {
		return analyzerDefinitions.get( name );
	}

	@Override
	public TokenizerDefinition getTokenizerDefinition(String name) {
		return tokenizerDefinitions.get( name );
	}

	@Override
	public TokenFilterDefinition getTokenFilterDefinition(String name) {
		return tokenFilterDefinitions.get( name );
	}

	@Override
	public CharFilterDefinition getCharFilterDefinition(String name) {
		return charFilterDefinitions.get( name );
	}

	public Map<String, AnalyzerDefinition> getAnalyzerDefinitions() {
		return Collections.unmodifiableMap( analyzerDefinitions );
	}

	public Map<String, TokenizerDefinition> getTokenizerDefinitions() {
		return Collections.unmodifiableMap( tokenizerDefinitions );
	}

	public Map<String, TokenFilterDefinition> getTokenFilterDefinitions() {
		return Collections.unmodifiableMap( tokenFilterDefinitions );
	}

	public Map<String, CharFilterDefinition> getCharFilterDefinitions() {
		return Collections.unmodifiableMap( charFilterDefinitions );
	}

}