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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.mapping.get;
import org.elasticsearch.action.admin.indices.mapping.get.GetFieldMappingsRequest;
import org.elasticsearch.action.admin.indices.mapping.get.GetFieldMappingsResponse;
import org.elasticsearch.action.admin.indices.mapping.get.GetFieldMappingsResponse.FieldMappingMetaData;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.BytesRestResponse;
import org.elasticsearch.rest.RestChannel;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.RestResponse;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.rest.action.support.RestBuilderListener;
import java.io.IOException;
import java.util.Map;
import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestStatus.NOT_FOUND;
import static org.elasticsearch.rest.RestStatus.OK;
/**
*
*/
public class RestGetFieldMappingAction extends BaseRestHandler {
@Inject
public RestGetFieldMappingAction(Settings settings, RestController controller, Client client) {
super(settings, client);
controller.registerHandler(GET, "/_mapping/field/{fields}", this);
controller.registerHandler(GET, "/_mapping/{type}/field/{fields}", this);
controller.registerHandler(GET, "/{index}/_mapping/field/{fields}", this);
controller.registerHandler(GET, "/{index}/{type}/_mapping/field/{fields}", this);
controller.registerHandler(GET, "/{index}/_mapping/{type}/field/{fields}", this);
}
@Override
public void handleRequest(final RestRequest request, final RestChannel channel, final Client client) {
final String[] indices = Strings.splitStringByCommaToArray(request.param("index"));
final String[] types = request.paramAsStringArrayOrEmptyIfAll("type");
final String[] fields = Strings.splitStringByCommaToArray(request.param("fields"));
GetFieldMappingsRequest getMappingsRequest = new GetFieldMappingsRequest();
getMappingsRequest.indices(indices).types(types).fields(fields).includeDefaults(request.paramAsBoolean("include_defaults", false));
getMappingsRequest.indicesOptions(IndicesOptions.fromRequest(request, getMappingsRequest.indicesOptions()));
getMappingsRequest.local(request.paramAsBoolean("local", getMappingsRequest.local()));
client.admin().indices().getFieldMappings(getMappingsRequest, new RestBuilderListener<GetFieldMappingsResponse>(channel) {
@Override
public RestResponse buildResponse(GetFieldMappingsResponse response, XContentBuilder builder) throws Exception {
Map<String, Map<String, Map<String, FieldMappingMetaData>>> mappingsByIndex = response.mappings();
boolean isPossibleSingleFieldRequest = indices.length == 1 && types.length == 1 && fields.length == 1;
if (isPossibleSingleFieldRequest && isFieldMappingMissingField(mappingsByIndex)) {
return new BytesRestResponse(OK, builder.startObject().endObject());
}
RestStatus status = OK;
if (mappingsByIndex.isEmpty() && fields.length > 0) {
status = NOT_FOUND;
}
builder.startObject();
response.toXContent(builder, request);
builder.endObject();
return new BytesRestResponse(status, builder);
}
});
}
/**
* Helper method to find out if the only included fieldmapping metadata is typed NULL, which means
* that type and index exist, but the field did not
*/
private boolean isFieldMappingMissingField(Map<String, Map<String, Map<String, FieldMappingMetaData>>> mappingsByIndex) throws IOException {
if (mappingsByIndex.size() != 1) {
return false;
}
for (Map<String, Map<String, FieldMappingMetaData>> value : mappingsByIndex.values()) {
for (Map<String, FieldMappingMetaData> fieldValue : value.values()) {
for (Map.Entry<String, FieldMappingMetaData> fieldMappingMetaDataEntry : fieldValue.entrySet()) {
if (fieldMappingMetaDataEntry.getValue().isNull()) {
return true;
}
}
}
}
return false;
}
}
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