/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * 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
 * under the License.
 */

package org.elasticsearch.index.analysis;

import org.apache.lucene.analysis.core.StopAnalyzer;
import org.apache.lucene.analysis.miscellaneous.PatternAnalyzer;
import org.apache.lucene.analysis.util.CharArraySet;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.Version;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.inject.assistedinject.Assisted;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.env.Environment;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.settings.IndexSettings;

import java.util.regex.Pattern;

/**
 *
 */
public class PatternAnalyzerProvider extends AbstractIndexAnalyzerProvider<PatternAnalyzer> {

    private final PatternAnalyzer analyzer;

    @Inject
    public PatternAnalyzerProvider(Index index, @IndexSettings Settings indexSettings, Environment env, @Assisted String name, @Assisted Settings settings) {
        super(index, indexSettings, name, settings);

        Version esVersion = indexSettings.getAsVersion(IndexMetaData.SETTING_VERSION_CREATED, org.elasticsearch.Version.CURRENT);
        final CharArraySet defaultStopwords;
        if (esVersion.onOrAfter(Version.V_1_0_0_RC1)) {
            defaultStopwords = CharArraySet.EMPTY_SET;
        } else {
            defaultStopwords = StopAnalyzer.ENGLISH_STOP_WORDS_SET;
        }
        boolean lowercase = settings.getAsBoolean("lowercase", true);
        CharArraySet stopWords = Analysis.parseStopWords(env, settings, defaultStopwords, version);

        String sPattern = settings.get("pattern", "\\W+" /*PatternAnalyzer.NON_WORD_PATTERN*/);
        if (sPattern == null) {
            throw new ElasticsearchIllegalArgumentException("Analyzer [" + name + "] of type pattern must have a `pattern` set");
        }
        Pattern pattern = Regex.compile(sPattern, settings.get("flags"));

        analyzer = new PatternAnalyzer(version, pattern, lowercase, stopWords);
    }

    @Override
    public PatternAnalyzer get() {
        return analyzer;
    }
}

@@ -864,82 +864,274 @@
 sis.
-core.StopAnalyzer;%0Aimport org.apache.lucene.analysis.miscellaneous
+Analyzer;%0Aimport org.apache.lucene.analysis.TokenStream;%0Aimport org.apache.lucene.analysis.core.LowerCaseFilter;%0Aimport org.apache.lucene.analysis.core.StopAnalyzer;%0Aimport org.apache.lucene.analysis.core.StopFilter;%0Aimport org.apache.lucene.analysis.pattern
 .Pattern
 Anal
@@ -1126,21 +1126,22 @@
 .Pattern
-Analy
+Tokeni
 zer;%0Aimp
@@ -1684,24 +1684,47 @@
 xSettings;%0A%0A
+import java.io.Reader;%0A
 import java.
@@ -1830,23 +1830,16 @@
 rovider%3C
-Pattern
 Analyzer
@@ -1888,16 +1888,1148 @@
 lyzer;%0A%0A
+    private static final class PatternAnalyzer extends Analyzer %7B%0A        private final org.apache.lucene.util.Version version;%0A        private final Pattern pattern;%0A        private final boolean lowercase;%0A        private final CharArraySet stopWords;%0A%0A        PatternAnalyzer(org.apache.lucene.util.Version version, Pattern pattern, boolean lowercase, CharArraySet stopWords) %7B%0A            this.version = version;%0A            this.pattern = pattern;%0A            this.lowercase = lowercase;%0A            this.stopWords = stopWords;%0A        %7D%0A%0A        @Override%0A        protected TokenStreamComponents createComponents(String s, Reader reader) %7B%0A            final TokenStreamComponents source = new TokenStreamComponents(new PatternTokenizer(reader, pattern, -1));%0A            TokenStream result = null;%0A            if (lowercase) %7B%0A                 result = new LowerCaseFilter(version, source.getTokenStream());%0A            %7D%0A            result = new StopFilter(version, (result == null) ? source.getTokenStream() : result, stopWords);%0A            return new TokenStreamComponents(source.getTokenizer(), result);%0A        %7D%0A    %7D%0A%0A
     @Inj

Remove Lucene's deprecated PatternTokenizer