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* 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.rest.action.admin.indices;
import org.elasticsearch.action.admin.indices.analyze.AnalyzeRequest;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.action.RestToXContentListener;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestRequest.Method.POST;
public class RestAnalyzeAction extends BaseRestHandler {
public static class Fields {
public static final ParseField ANALYZER = new ParseField("analyzer");
public static final ParseField TEXT = new ParseField("text");
public static final ParseField FIELD = new ParseField("field");
public static final ParseField TOKENIZER = new ParseField("tokenizer");
public static final ParseField TOKEN_FILTERS = new ParseField("filter");
public static final ParseField CHAR_FILTERS = new ParseField("char_filter");
public static final ParseField EXPLAIN = new ParseField("explain");
public static final ParseField ATTRIBUTES = new ParseField("attributes");
}
public RestAnalyzeAction(Settings settings, RestController controller) {
super(settings);
controller.registerHandler(GET, "/_analyze", this);
controller.registerHandler(GET, "/{index}/_analyze", this);
controller.registerHandler(POST, "/_analyze", this);
controller.registerHandler(POST, "/{index}/_analyze", this);
}
@Override
public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
AnalyzeRequest analyzeRequest = new AnalyzeRequest(request.param("index"));
try (XContentParser parser = request.contentOrSourceParamParser()) {
buildFromContent(parser, analyzeRequest);
} catch (IOException e) {
throw new IllegalArgumentException("Failed to parse request body", e);
}
return channel -> client.admin().indices().analyze(analyzeRequest, new RestToXContentListener<>(channel));
}
static void buildFromContent(XContentParser parser, AnalyzeRequest analyzeRequest)
throws IOException {
if (parser.nextToken() != XContentParser.Token.START_OBJECT) {
throw new IllegalArgumentException("Malformed content, must start with an object");
} else {
XContentParser.Token token;
String currentFieldName = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (Fields.TEXT.match(currentFieldName) && token == XContentParser.Token.VALUE_STRING) {
analyzeRequest.text(parser.text());
} else if (Fields.TEXT.match(currentFieldName) && token == XContentParser.Token.START_ARRAY) {
List<String> texts = new ArrayList<>();
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
if (token.isValue() == false) {
throw new IllegalArgumentException(currentFieldName + " array element should only contain text");
}
texts.add(parser.text());
}
analyzeRequest.text(texts.toArray(new String[texts.size()]));
} else if (Fields.ANALYZER.match(currentFieldName) && token == XContentParser.Token.VALUE_STRING) {
analyzeRequest.analyzer(parser.text());
} else if (Fields.FIELD.match(currentFieldName) && token == XContentParser.Token.VALUE_STRING) {
analyzeRequest.field(parser.text());
} else if (Fields.TOKENIZER.match(currentFieldName)) {
if (token == XContentParser.Token.VALUE_STRING) {
analyzeRequest.tokenizer(parser.text());
} else if (token == XContentParser.Token.START_OBJECT) {
analyzeRequest.tokenizer(parser.map());
} else {
throw new IllegalArgumentException(currentFieldName + " should be tokenizer's name or setting");
}
} else if (Fields.TOKEN_FILTERS.match(currentFieldName)
&& token == XContentParser.Token.START_ARRAY) {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
if (token == XContentParser.Token.VALUE_STRING) {
analyzeRequest.addTokenFilter(parser.text());
} else if (token == XContentParser.Token.START_OBJECT) {
analyzeRequest.addTokenFilter(parser.map());
} else {
throw new IllegalArgumentException(currentFieldName
+ " array element should contain filter's name or setting");
}
}
} else if (Fields.CHAR_FILTERS.match(currentFieldName)
&& token == XContentParser.Token.START_ARRAY) {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
if (token == XContentParser.Token.VALUE_STRING) {
analyzeRequest.addCharFilter(parser.text());
} else if (token == XContentParser.Token.START_OBJECT) {
analyzeRequest.addCharFilter(parser.map());
} else {
throw new IllegalArgumentException(currentFieldName
+ " array element should contain char filter's name or setting");
}
}
} else if (Fields.EXPLAIN.match(currentFieldName)) {
if (parser.isBooleanValue()) {
analyzeRequest.explain(parser.booleanValue());
} else {
throw new IllegalArgumentException(currentFieldName + " must be either 'true' or 'false'");
}
} else if (Fields.ATTRIBUTES.match(currentFieldName) && token == XContentParser.Token.START_ARRAY) {
List<String> attributes = new ArrayList<>();
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
if (token.isValue() == false) {
throw new IllegalArgumentException(currentFieldName + " array element should only contain attribute name");
}
attributes.add(parser.text());
}
analyzeRequest.attributes(attributes.toArray(new String[attributes.size()]));
} else {
throw new IllegalArgumentException("Unknown parameter ["
+ currentFieldName + "] in request body or parameter is of the wrong type[" + token + "] ");
}
}
}
}
}