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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.search.aggregations.bucket.composite;
import org.elasticsearch.Version;
import org.elasticsearch.common.ParsingException;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.script.Script;
import org.elasticsearch.search.aggregations.support.ValueType;
import org.elasticsearch.xcontent.AbstractObjectParser;
import org.elasticsearch.xcontent.ObjectParser;
import org.elasticsearch.xcontent.ParseField;
import org.elasticsearch.xcontent.ToXContent.Params;
import org.elasticsearch.xcontent.XContentBuilder;
import org.elasticsearch.xcontent.XContentParser;
import java.io.IOException;
import static org.elasticsearch.common.xcontent.XContentParserUtils.ensureExpectedToken;
public class CompositeValuesSourceParserHelper {
static , T> void declareValuesSourceFields(AbstractObjectParser objectParser) {
objectParser.declareField(VB::field, XContentParser::text, new ParseField("field"), ObjectParser.ValueType.STRING);
objectParser.declareBoolean(VB::missingBucket, new ParseField("missing_bucket"));
objectParser.declareString(VB::missingOrder, new ParseField("missing_order"));
objectParser.declareField(VB::userValuetypeHint, p -> {
ValueType valueType = ValueType.lenientParse(p.text());
return valueType;
}, new ParseField("value_type"), ObjectParser.ValueType.STRING);
objectParser.declareField(
VB::script,
(parser, context) -> Script.parse(parser),
Script.SCRIPT_PARSE_FIELD,
ObjectParser.ValueType.OBJECT_OR_STRING
);
objectParser.declareField(VB::order, XContentParser::text, new ParseField("order"), ObjectParser.ValueType.STRING);
}
public static void writeTo(CompositeValuesSourceBuilder builder, StreamOutput out) throws IOException {
final byte code;
if (builder.getClass() == TermsValuesSourceBuilder.class) {
code = 0;
} else if (builder.getClass() == DateHistogramValuesSourceBuilder.class) {
code = 1;
} else if (builder.getClass() == HistogramValuesSourceBuilder.class) {
code = 2;
} else if (builder.getClass() == GeoTileGridValuesSourceBuilder.class) {
if (out.getVersion().before(Version.V_7_5_0)) {
throw new IOException(
"Attempting to serialize ["
+ builder.getClass().getSimpleName()
+ "] to a node with unsupported version ["
+ out.getVersion()
+ "]"
);
}
code = 3;
} else {
throw new IOException("invalid builder type: " + builder.getClass().getSimpleName());
}
out.writeByte(code);
builder.writeTo(out);
}
public static CompositeValuesSourceBuilder readFrom(StreamInput in) throws IOException {
int code = in.readByte();
switch (code) {
case 0:
return new TermsValuesSourceBuilder(in);
case 1:
return new DateHistogramValuesSourceBuilder(in);
case 2:
return new HistogramValuesSourceBuilder(in);
case 3:
return new GeoTileGridValuesSourceBuilder(in);
default:
throw new IOException("Invalid code " + code);
}
}
public static CompositeValuesSourceBuilder fromXContent(XContentParser parser) throws IOException {
XContentParser.Token token = parser.currentToken();
ensureExpectedToken(XContentParser.Token.START_OBJECT, token, parser);
token = parser.nextToken();
ensureExpectedToken(XContentParser.Token.FIELD_NAME, token, parser);
String name = parser.currentName();
token = parser.nextToken();
ensureExpectedToken(XContentParser.Token.START_OBJECT, token, parser);
token = parser.nextToken();
ensureExpectedToken(XContentParser.Token.FIELD_NAME, token, parser);
String type = parser.currentName();
token = parser.nextToken();
ensureExpectedToken(XContentParser.Token.START_OBJECT, token, parser);
final CompositeValuesSourceBuilder builder;
switch (type) {
case TermsValuesSourceBuilder.TYPE:
builder = TermsValuesSourceBuilder.parse(name, parser);
break;
case DateHistogramValuesSourceBuilder.TYPE:
builder = DateHistogramValuesSourceBuilder.PARSER.parse(parser, name);
break;
case HistogramValuesSourceBuilder.TYPE:
builder = HistogramValuesSourceBuilder.parse(name, parser);
break;
case GeoTileGridValuesSourceBuilder.TYPE:
builder = GeoTileGridValuesSourceBuilder.parse(name, parser);
break;
default:
throw new ParsingException(parser.getTokenLocation(), "invalid source type: " + type);
}
parser.nextToken();
parser.nextToken();
return builder;
}
public static XContentBuilder toXContent(CompositeValuesSourceBuilder source, XContentBuilder builder, Params params)
throws IOException {
builder.startObject();
builder.startObject(source.name());
source.toXContent(builder, params);
builder.endObject();
builder.endObject();
return builder;
}
}