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* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
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package org.elasticsearch.index.analysis;
import org.apache.lucene.analysis.miscellaneous.Lucene43TrimFilter;
import org.apache.lucene.util.Version;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.miscellaneous.TrimFilter;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.inject.assistedinject.Assisted;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.env.Environment;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.settings.IndexSettingsService;
public class TrimTokenFilterFactory extends AbstractTokenFilterFactory {
private final boolean updateOffsets;
private static final String UPDATE_OFFSETS_KEY = "update_offsets";
@Inject
public TrimTokenFilterFactory(Index index, IndexSettingsService indexSettingsService, Environment env, @Assisted String name, @Assisted Settings settings) {
super(index, indexSettingsService.getSettings(), name, settings);
if (version.onOrAfter(Version.LUCENE_4_4_0) && settings.get(UPDATE_OFFSETS_KEY) != null) {
throw new IllegalArgumentException(UPDATE_OFFSETS_KEY + " is not supported anymore. Please fix your analysis chain or use"
+ " an older compatibility version (<=4.3) but beware that it might cause highlighting bugs.");
}
this.updateOffsets = settings.getAsBoolean("update_offsets", false);
}
@Override
public TokenStream create(TokenStream tokenStream) {
if (version.onOrAfter(Version.LUCENE_4_4_0)) {
return new TrimFilter(tokenStream);
} else {
@SuppressWarnings("deprecation")
final TokenStream filter = new Lucene43TrimFilter(tokenStream, updateOffsets);
return filter;
}
}
}