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IndicesFilterParser.java
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IndicesFilterParser.java
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/*
* Licensed to ElasticSearch and Shay Banon 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.query;
import com.google.common.collect.Sets;
import org.apache.lucene.search.Filter;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.lucene.search.Queries;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.common.xcontent.XContentParser;
import java.io.IOException;
import java.util.Set;
/**
*/
public class IndicesFilterParser implements FilterParser {
public static final String NAME = "indices";
@Nullable
private final ClusterService clusterService;
@Inject
public IndicesFilterParser(@Nullable ClusterService clusterService) {
this.clusterService = clusterService;
}
@Override
public String[] names() {
return new String[]{NAME};
}
@Override
public Filter parse(QueryParseContext parseContext) throws IOException, QueryParsingException {
XContentParser parser = parseContext.parser();
Filter filter = null;
Set<String> indices = Sets.newHashSet();
String currentFieldName = null;
XContentParser.Token token;
Filter noMatchFilter = Queries.MATCH_ALL_FILTER;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.START_OBJECT) {
if ("filter".equals(currentFieldName)) {
filter = parseContext.parseInnerFilter();
} else if ("no_match_filter".equals(currentFieldName)) {
noMatchFilter = parseContext.parseInnerFilter();
} else {
throw new QueryParsingException(parseContext.index(), "[indices] filter does not support [" + currentFieldName + "]");
}
} else if (token == XContentParser.Token.START_ARRAY) {
if ("indices".equals(currentFieldName)) {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
String value = parser.textOrNull();
if (value == null) {
throw new QueryParsingException(parseContext.index(), "No value specified for term filter");
}
indices.add(value);
}
} else {
throw new QueryParsingException(parseContext.index(), "[indices] filter does not support [" + currentFieldName + "]");
}
} else if (token.isValue()) {
if ("index".equals(currentFieldName)) {
indices.add(parser.text());
} else if ("no_match_filter".equals(currentFieldName)) {
String type = parser.text();
if ("all".equals(type)) {
noMatchFilter = Queries.MATCH_ALL_FILTER;
} else if ("none".equals(type)) {
noMatchFilter = Queries.MATCH_NO_FILTER;
}
} else {
throw new QueryParsingException(parseContext.index(), "[indices] filter does not support [" + currentFieldName + "]");
}
}
}
if (filter == null) {
throw new QueryParsingException(parseContext.index(), "[indices] requires 'filter' element");
}
if (indices.isEmpty()) {
throw new QueryParsingException(parseContext.index(), "[indices] requires 'indices' element");
}
String[] concreteIndices = indices.toArray(new String[indices.size()]);
if (clusterService != null) {
MetaData metaData = clusterService.state().metaData();
concreteIndices = metaData.concreteIndices(indices.toArray(new String[indices.size()]), true, true);
}
for (String index : concreteIndices) {
if (Regex.simpleMatch(index, parseContext.index().name())) {
return filter;
}
}
return noMatchFilter;
}
}