org.opensearch.search.aggregations.pipeline.BucketSelectorPipelineAggregationBuilder Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of opensearch Show documentation
Show all versions of opensearch Show documentation
OpenSearch subproject :server
/*
* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
/*
* 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.
*/
/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*/
package org.opensearch.search.aggregations.pipeline;
import org.opensearch.core.common.ParsingException;
import org.opensearch.core.common.io.stream.StreamInput;
import org.opensearch.core.common.io.stream.StreamOutput;
import org.opensearch.core.xcontent.XContentBuilder;
import org.opensearch.core.xcontent.XContentParser;
import org.opensearch.script.Script;
import org.opensearch.search.aggregations.pipeline.BucketHelpers.GapPolicy;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.TreeMap;
import static org.opensearch.search.aggregations.pipeline.PipelineAggregator.Parser.BUCKETS_PATH;
import static org.opensearch.search.aggregations.pipeline.PipelineAggregator.Parser.GAP_POLICY;
/**
* Aggregation Builder for bucket_selector agg
*
* @opensearch.internal
*/
public class BucketSelectorPipelineAggregationBuilder extends AbstractPipelineAggregationBuilder {
public static final String NAME = "bucket_selector";
private final Map bucketsPathsMap;
private final Script script;
private GapPolicy gapPolicy = GapPolicy.SKIP;
public BucketSelectorPipelineAggregationBuilder(String name, Map bucketsPathsMap, Script script) {
super(name, NAME, new TreeMap<>(bucketsPathsMap).values().toArray(new String[bucketsPathsMap.size()]));
this.bucketsPathsMap = bucketsPathsMap;
this.script = script;
}
public BucketSelectorPipelineAggregationBuilder(String name, Script script, String... bucketsPaths) {
this(name, convertToBucketsPathMap(bucketsPaths), script);
}
/**
* Read from a stream.
*/
public BucketSelectorPipelineAggregationBuilder(StreamInput in) throws IOException {
super(in, NAME);
bucketsPathsMap = in.readMap(StreamInput::readString, StreamInput::readString);
script = new Script(in);
gapPolicy = GapPolicy.readFrom(in);
}
@Override
protected void doWriteTo(StreamOutput out) throws IOException {
out.writeMap(bucketsPathsMap, StreamOutput::writeString, StreamOutput::writeString);
script.writeTo(out);
gapPolicy.writeTo(out);
}
private static Map convertToBucketsPathMap(String[] bucketsPaths) {
Map bucketsPathsMap = new HashMap<>();
for (int i = 0; i < bucketsPaths.length; i++) {
bucketsPathsMap.put("_value" + i, bucketsPaths[i]);
}
return bucketsPathsMap;
}
/**
* Sets the gap policy to use for this aggregation.
*/
public BucketSelectorPipelineAggregationBuilder gapPolicy(GapPolicy gapPolicy) {
if (gapPolicy == null) {
throw new IllegalArgumentException("[gapPolicy] must not be null: [" + name + "]");
}
this.gapPolicy = gapPolicy;
return this;
}
/**
* Gets the gap policy to use for this aggregation.
*/
public GapPolicy gapPolicy() {
return gapPolicy;
}
@Override
protected PipelineAggregator createInternal(Map metadata) {
return new BucketSelectorPipelineAggregator(name, bucketsPathsMap, script, gapPolicy, metadata);
}
@Override
protected XContentBuilder internalXContent(XContentBuilder builder, Params params) throws IOException {
builder.field(BUCKETS_PATH.getPreferredName(), bucketsPathsMap);
builder.field(Script.SCRIPT_PARSE_FIELD.getPreferredName(), script);
builder.field(GAP_POLICY.getPreferredName(), gapPolicy.getName());
return builder;
}
public static BucketSelectorPipelineAggregationBuilder parse(String reducerName, XContentParser parser) throws IOException {
XContentParser.Token token;
Script script = null;
String currentFieldName = null;
Map bucketsPathsMap = null;
GapPolicy gapPolicy = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.VALUE_STRING) {
if (BUCKETS_PATH.match(currentFieldName, parser.getDeprecationHandler())) {
bucketsPathsMap = new HashMap<>();
bucketsPathsMap.put("_value", parser.text());
} else if (GAP_POLICY.match(currentFieldName, parser.getDeprecationHandler())) {
gapPolicy = GapPolicy.parse(parser.text(), parser.getTokenLocation());
} else if (Script.SCRIPT_PARSE_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
script = Script.parse(parser);
} else {
throw new ParsingException(
parser.getTokenLocation(),
"Unknown key for a " + token + " in [" + reducerName + "]: [" + currentFieldName + "]."
);
}
} else if (token == XContentParser.Token.START_ARRAY) {
if (BUCKETS_PATH.match(currentFieldName, parser.getDeprecationHandler())) {
List paths = new ArrayList<>();
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
String path = parser.text();
paths.add(path);
}
bucketsPathsMap = new HashMap<>();
for (int i = 0; i < paths.size(); i++) {
bucketsPathsMap.put("_value" + i, paths.get(i));
}
} else {
throw new ParsingException(
parser.getTokenLocation(),
"Unknown key for a " + token + " in [" + reducerName + "]: [" + currentFieldName + "]."
);
}
} else if (token == XContentParser.Token.START_OBJECT) {
if (Script.SCRIPT_PARSE_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
script = Script.parse(parser);
} else if (BUCKETS_PATH.match(currentFieldName, parser.getDeprecationHandler())) {
Map map = parser.map();
bucketsPathsMap = new HashMap<>();
for (Map.Entry entry : map.entrySet()) {
bucketsPathsMap.put(entry.getKey(), String.valueOf(entry.getValue()));
}
} else {
throw new ParsingException(
parser.getTokenLocation(),
"Unknown key for a " + token + " in [" + reducerName + "]: [" + currentFieldName + "]."
);
}
} else {
throw new ParsingException(parser.getTokenLocation(), "Unexpected token " + token + " in [" + reducerName + "].");
}
}
if (bucketsPathsMap == null) {
throw new ParsingException(
parser.getTokenLocation(),
"Missing required field [" + BUCKETS_PATH.getPreferredName() + "] for bucket_selector aggregation [" + reducerName + "]"
);
}
if (script == null) {
throw new ParsingException(
parser.getTokenLocation(),
"Missing required field ["
+ Script.SCRIPT_PARSE_FIELD.getPreferredName()
+ "] for bucket_selector aggregation ["
+ reducerName
+ "]"
);
}
BucketSelectorPipelineAggregationBuilder factory = new BucketSelectorPipelineAggregationBuilder(
reducerName,
bucketsPathsMap,
script
);
if (gapPolicy != null) {
factory.gapPolicy(gapPolicy);
}
return factory;
}
@Override
protected void validate(ValidationContext context) {
context.validateHasParent(NAME, name);
}
@Override
protected boolean overrideBucketsPath() {
return true;
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), bucketsPathsMap, script, gapPolicy);
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null || getClass() != obj.getClass()) return false;
if (super.equals(obj) == false) return false;
BucketSelectorPipelineAggregationBuilder other = (BucketSelectorPipelineAggregationBuilder) obj;
return Objects.equals(bucketsPathsMap, other.bucketsPathsMap)
&& Objects.equals(script, other.script)
&& Objects.equals(gapPolicy, other.gapPolicy);
}
@Override
public String getWriteableName() {
return NAME;
}
}