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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 com.carrotsearch.hppc.cursors.ObjectCursor;
import com.carrotsearch.hppc.cursors.ObjectObjectCursor;
import org.elasticsearch.action.admin.indices.mapping.get.GetMappingsRequest;
import org.elasticsearch.action.admin.indices.mapping.get.GetMappingsResponse;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.cluster.metadata.MappingMetaData;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.set.Sets;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.index.IndexNotFoundException;
import org.elasticsearch.indices.TypeMissingException;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.BytesRestResponse;
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.RestBuilderListener;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Set;
import java.util.SortedSet;
import java.util.stream.Collectors;
import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestRequest.Method.HEAD;
import static org.elasticsearch.rest.RestStatus.OK;
public class RestGetMappingAction extends BaseRestHandler {
public RestGetMappingAction(final Settings settings, final RestController controller) {
super(settings);
controller.registerHandler(GET, "/{index}/{type}/_mapping", this);
controller.registerHandler(GET, "/{index}/_mappings", this);
controller.registerHandler(GET, "/{index}/_mapping", this);
controller.registerHandler(GET, "/{index}/_mappings/{type}", this);
controller.registerHandler(GET, "/{index}/_mapping/{type}", this);
controller.registerHandler(HEAD, "/{index}/_mapping/{type}", this);
controller.registerHandler(GET, "/_mapping/{type}", this);
}
@Override
public String getName() {
return "get_mapping_action";
}
@Override
public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
final String[] indices = Strings.splitStringByCommaToArray(request.param("index"));
final String[] types = request.paramAsStringArrayOrEmptyIfAll("type");
final GetMappingsRequest getMappingsRequest = new GetMappingsRequest();
getMappingsRequest.indices(indices).types(types);
getMappingsRequest.indicesOptions(IndicesOptions.fromRequest(request, getMappingsRequest.indicesOptions()));
getMappingsRequest.local(request.paramAsBoolean("local", getMappingsRequest.local()));
return channel -> client.admin().indices().getMappings(getMappingsRequest, new RestBuilderListener(channel) {
@Override
public RestResponse buildResponse(final GetMappingsResponse response, final XContentBuilder builder) throws Exception {
final ImmutableOpenMap> mappingsByIndex = response.getMappings();
if (mappingsByIndex.isEmpty() && (indices.length != 0 || types.length != 0)) {
if (indices.length != 0 && types.length == 0) {
builder.close();
return new BytesRestResponse(channel, new IndexNotFoundException(String.join(",", indices)));
} else {
builder.close();
return new BytesRestResponse(channel, new TypeMissingException("_all", String.join(",", types)));
}
}
final Set typeNames = new HashSet<>();
for (final ObjectCursor> cursor : mappingsByIndex.values()) {
for (final ObjectCursor inner : cursor.value.keys()) {
typeNames.add(inner.value);
}
}
final SortedSet difference = Sets.sortedDifference(Arrays.stream(types).collect(Collectors.toSet()), typeNames);
// now remove requested aliases that contain wildcards that are simple matches
final List matches = new ArrayList<>();
outer:
for (final String pattern : difference) {
if (pattern.contains("*")) {
for (final String typeName : typeNames) {
if (Regex.simpleMatch(pattern, typeName)) {
matches.add(pattern);
continue outer;
}
}
}
}
difference.removeAll(matches);
final RestStatus status;
builder.startObject();
{
if (difference.isEmpty()) {
status = RestStatus.OK;
} else {
status = RestStatus.NOT_FOUND;
final String message;
if (difference.size() == 1) {
message = String.format(Locale.ROOT, "type [%s] missing", toNamesString(difference.iterator().next()));
} else {
message = String.format(Locale.ROOT, "types [%s] missing", toNamesString(difference.toArray(new String[0])));
}
builder.field("error", message);
builder.field("status", status.getStatus());
}
for (final ObjectObjectCursor> indexEntry : mappingsByIndex) {
builder.startObject(indexEntry.key);
{
builder.startObject("mappings");
{
for (final ObjectObjectCursor typeEntry : indexEntry.value) {
builder.field(typeEntry.key, typeEntry.value.sourceAsMap());
}
}
builder.endObject();
}
builder.endObject();
}
}
builder.endObject();
return new BytesRestResponse(status, builder);
}
});
}
private static String toNamesString(final String... names) {
return Arrays.stream(names).collect(Collectors.joining(","));
}
}