org.elasticsearch.search.fetch.partial.PartialFieldsParseElement Maven / Gradle / Ivy
/*
* 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.search.fetch.partial;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.search.SearchParseElement;
import org.elasticsearch.search.internal.SearchContext;
import java.util.ArrayList;
import java.util.List;
/**
*
* "partial_fields" : {
* "test1" : {
* "includes" : "doc['field_name'].value"
* },
* "test2" : {
* "excludes" : "..."
* }
* }
*
*/
public class PartialFieldsParseElement implements SearchParseElement {
@Override
public void parse(XContentParser parser, SearchContext context) throws Exception {
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 (token == XContentParser.Token.START_OBJECT) {
String fieldName = currentFieldName;
List includes = null;
List excludes = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.START_ARRAY) {
if ("includes".equals(currentFieldName) || "include".equals(currentFieldName)) {
if (includes == null) {
includes = new ArrayList(2);
}
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
includes.add(parser.text());
}
} else if ("excludes".equals(currentFieldName) || "exclude".equals(currentFieldName)) {
if (excludes == null) {
excludes = new ArrayList(2);
}
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
excludes.add(parser.text());
}
}
} else if (token.isValue()) {
if ("include".equals(currentFieldName)) {
if (includes == null) {
includes = new ArrayList(2);
}
includes.add(parser.text());
} else if ("exclude".equals(currentFieldName)) {
if (excludes == null) {
excludes = new ArrayList(2);
}
excludes.add(parser.text());
}
}
}
PartialFieldsContext.PartialField field = new PartialFieldsContext.PartialField(fieldName,
includes == null ? Strings.EMPTY_ARRAY : includes.toArray(new String[includes.size()]),
excludes == null ? Strings.EMPTY_ARRAY : excludes.toArray(new String[excludes.size()]));
context.partialFields().add(field);
}
}
}
}