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Elasticsearch - Open Source, Distributed, RESTful Search Engine
/*
* 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.analyze;
import org.elasticsearch.action.admin.indices.analyze.AnalyzeRequest;
import org.elasticsearch.action.admin.indices.analyze.AnalyzeResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.ParseFieldMatcher;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentHelper;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.RestChannel;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.action.support.RestActions;
import org.elasticsearch.rest.action.support.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", "token_filter", "token_filters", "filters");
public static final ParseField CHAR_FILTERS = new ParseField("char_filter", "char_filters");
public static final ParseField EXPLAIN = new ParseField("explain");
public static final ParseField ATTRIBUTES = new ParseField("attributes");
}
@Inject
public RestAnalyzeAction(Settings settings, RestController controller, Client client) {
super(settings, controller, client);
controller.registerHandler(GET, "/_analyze", this);
controller.registerHandler(GET, "/{index}/_analyze", this);
controller.registerHandler(POST, "/_analyze", this);
controller.registerHandler(POST, "/{index}/_analyze", this);
}
@Override
public void handleRequest(final RestRequest request, final RestChannel channel, final Client client) {
String[] texts = request.paramAsStringArrayOrEmptyIfAll("text");
AnalyzeRequest analyzeRequest = new AnalyzeRequest(request.param("index"));
analyzeRequest.text(texts);
analyzeRequest.analyzer(request.param("analyzer"));
analyzeRequest.field(request.param("field"));
analyzeRequest.tokenizer(request.param("tokenizer"));
analyzeRequest.tokenFilters(request.paramAsStringArray("filter", request.paramAsStringArray("token_filter",
request.paramAsStringArray("token_filters", request.paramAsStringArray("filters", analyzeRequest.tokenFilters())))));
analyzeRequest.charFilters(request.paramAsStringArray("char_filter", request.paramAsStringArray("char_filters", analyzeRequest.charFilters())));
analyzeRequest.explain(request.paramAsBoolean("explain", false));
analyzeRequest.attributes(request.paramAsStringArray("attributes", analyzeRequest.attributes()));
if (RestActions.hasBodyContent(request)) {
XContentType type = RestActions.guessBodyContentType(request);
if (type == null) {
if (texts == null || texts.length == 0) {
texts = new String[]{ RestActions.getRestContent(request).toUtf8() };
analyzeRequest.text(texts);
}
} else {
// NOTE: if rest request with xcontent body has request parameters, the parameters does not override xcontent values
buildFromContent(RestActions.getRestContent(request), analyzeRequest, parseFieldMatcher);
}
}
client.admin().indices().analyze(analyzeRequest, new RestToXContentListener(channel));
}
public static void buildFromContent(BytesReference content, AnalyzeRequest analyzeRequest, ParseFieldMatcher parseFieldMatcher) {
try (XContentParser parser = XContentHelper.createParser(content)) {
if (parser.nextToken() != XContentParser.Token.START_OBJECT) {
throw new IllegalArgumentException("Malforrmed 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 (parseFieldMatcher.match(currentFieldName, Fields.TEXT) && token == XContentParser.Token.VALUE_STRING) {
analyzeRequest.text(parser.text());
} else if (parseFieldMatcher.match(currentFieldName, Fields.TEXT) && token == XContentParser.Token.START_ARRAY) {
List 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 (parseFieldMatcher.match(currentFieldName, Fields.ANALYZER) && token == XContentParser.Token.VALUE_STRING) {
analyzeRequest.analyzer(parser.text());
} else if (parseFieldMatcher.match(currentFieldName, Fields.FIELD) && token == XContentParser.Token.VALUE_STRING) {
analyzeRequest.field(parser.text());
} else if (parseFieldMatcher.match(currentFieldName, Fields.TOKENIZER) && token == XContentParser.Token.VALUE_STRING) {
analyzeRequest.tokenizer(parser.text());
} else if (parseFieldMatcher.match(currentFieldName, Fields.TOKEN_FILTERS) && token == XContentParser.Token.START_ARRAY) {
List filters = new ArrayList<>();
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
if (token.isValue() == false) {
throw new IllegalArgumentException(currentFieldName + " array element should only contain token filter's name");
}
filters.add(parser.text());
}
analyzeRequest.tokenFilters(filters.toArray(new String[filters.size()]));
} else if (parseFieldMatcher.match(currentFieldName, Fields.CHAR_FILTERS) && token == XContentParser.Token.START_ARRAY) {
List charFilters = new ArrayList<>();
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
if (token.isValue() == false) {
throw new IllegalArgumentException(currentFieldName + " array element should only contain char filter's name");
}
charFilters.add(parser.text());
}
analyzeRequest.charFilters(charFilters.toArray(new String[charFilters.size()]));
} else if (parseFieldMatcher.match(currentFieldName, Fields.EXPLAIN)) {
if (parser.isBooleanValue()) {
analyzeRequest.explain(parser.booleanValue());
} else {
throw new IllegalArgumentException(currentFieldName + " must be either 'true' or 'false'");
}
} else if (parseFieldMatcher.match(currentFieldName, Fields.ATTRIBUTES) && token == XContentParser.Token.START_ARRAY){
List 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 + "] ");
}
}
}
} catch (IOException e) {
throw new IllegalArgumentException("Failed to parse request body", e);
}
}
}