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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.search.aggregations.pipeline;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.search.aggregations.AggregatorFactory;
import org.elasticsearch.search.aggregations.PipelineAggregationBuilder;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Objects;
/**
* Base implementation of a {@link PipelineAggregationBuilder}.
*/
public abstract class AbstractPipelineAggregationBuilder<PAB extends AbstractPipelineAggregationBuilder<PAB>>
extends PipelineAggregationBuilder {
/**
* Field shared by many parsers.
*/
public static final ParseField BUCKETS_PATH_FIELD = new ParseField("buckets_path");
protected final String type;
protected Map<String, Object> metaData;
protected AbstractPipelineAggregationBuilder(String name, String type, String[] bucketsPaths) {
super(name, bucketsPaths);
if (type == null) {
throw new IllegalArgumentException("[type] must not be null: [" + name + "]");
}
this.type = type;
}
/**
* Read from a stream.
*/
protected AbstractPipelineAggregationBuilder(StreamInput in, String type) throws IOException {
this(in.readString(), type, in.readStringArray());
metaData = in.readMap();
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeString(name);
out.writeStringArray(bucketsPaths);
out.writeMap(metaData);
doWriteTo(out);
}
protected abstract void doWriteTo(StreamOutput out) throws IOException;
public String type() {
return type;
}
/**
* Validates the state of this factory (makes sure the factory is properly
* configured)
*/
@Override
public final void validate(AggregatorFactory<?> parent, AggregatorFactory<?>[] factories,
List<PipelineAggregationBuilder> pipelineAggregatorFactories) {
doValidate(parent, factories, pipelineAggregatorFactories);
}
protected abstract PipelineAggregator createInternal(Map<String, Object> metaData) throws IOException;
/**
* Creates the pipeline aggregator
*
* @return The created aggregator
*/
@Override
public final PipelineAggregator create() throws IOException {
PipelineAggregator aggregator = createInternal(this.metaData);
return aggregator;
}
public void doValidate(AggregatorFactory<?> parent, AggregatorFactory<?>[] factories,
List<PipelineAggregationBuilder> pipelineAggregatorFactories) {
}
@SuppressWarnings("unchecked")
@Override
public PAB setMetaData(Map<String, Object> metaData) {
this.metaData = metaData;
return (PAB) this;
}
@Override
public final XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(getName());
if (this.metaData != null) {
builder.field("meta", this.metaData);
}
builder.startObject(type);
if (!overrideBucketsPath() && bucketsPaths != null) {
builder.startArray(PipelineAggregator.Parser.BUCKETS_PATH.getPreferredName());
for (String path : bucketsPaths) {
builder.value(path);
}
builder.endArray();
}
internalXContent(builder, params);
builder.endObject();
return builder.endObject();
}
/**
* @return <code>true</code> if the {@link AbstractPipelineAggregationBuilder}
* overrides the XContent rendering of the bucketPath option.
*/
protected boolean overrideBucketsPath() {
return false;
}
protected abstract XContentBuilder internalXContent(XContentBuilder builder, Params params) throws IOException;
@Override
public int hashCode() {
return Objects.hash(Arrays.hashCode(bucketsPaths), metaData, name, type, doHashCode());
}
protected abstract int doHashCode();
@Override
public boolean equals(Object obj) {
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
@SuppressWarnings("unchecked")
AbstractPipelineAggregationBuilder<PAB> other = (AbstractPipelineAggregationBuilder<PAB>) obj;
if (!Objects.equals(name, other.name))
return false;
if (!Objects.equals(type, other.type))
return false;
if (!Objects.deepEquals(bucketsPaths, other.bucketsPaths))
return false;
if (!Objects.equals(metaData, other.metaData))
return false;
return doEquals(obj);
}
protected abstract boolean doEquals(Object obj);
@Override
public String getType() {
return type;
}
}
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