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Create a class to hold field capabilities for one index.
Currently, the same class `FieldCapabilities` is used both to represent the capabilities for one index, and also the merged capabilities across indices. To help clarify the logic, this PR proposes to create a separate class `IndexFieldCapabilities` for the capabilities in one index. The refactor will also help when adding `source_path` information in elastic#49264, since the merged source path field will have a different structure from the field for a single index. Individual changes: * Add a new class IndexFieldCapabilities. * Remove extra constructor from FieldCapabilities. * Combine the add and merge methods in FieldCapabilities.Builder.
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server/src/main/java/org/elasticsearch/action/fieldcaps/IndexFieldCapabilities.java
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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. | ||
*/ | ||
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package org.elasticsearch.action.fieldcaps; | ||
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import org.elasticsearch.Version; | ||
import org.elasticsearch.common.io.stream.StreamInput; | ||
import org.elasticsearch.common.io.stream.StreamOutput; | ||
import org.elasticsearch.common.io.stream.Writeable; | ||
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import java.io.IOException; | ||
import java.util.Map; | ||
import java.util.Objects; | ||
import java.util.Set; | ||
import java.util.stream.Collectors; | ||
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/** | ||
* Describes the capabilities of a field in a single index. | ||
*/ | ||
public class IndexFieldCapabilities implements Writeable { | ||
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private final String name; | ||
private final String type; | ||
private final boolean isSearchable; | ||
private final boolean isAggregatable; | ||
private final Map<String, String> meta; | ||
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/** | ||
* @param name The name of the field. | ||
* @param type The type associated with the field. | ||
* @param isSearchable Whether this field is indexed for search. | ||
* @param isAggregatable Whether this field can be aggregated on. | ||
* @param meta Metadata about the field. | ||
*/ | ||
IndexFieldCapabilities(String name, String type, | ||
boolean isSearchable, boolean isAggregatable, | ||
Map<String, String> meta) { | ||
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this.name = name; | ||
this.type = type; | ||
this.isSearchable = isSearchable; | ||
this.isAggregatable = isAggregatable; | ||
this.meta = meta; | ||
} | ||
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IndexFieldCapabilities(StreamInput in) throws IOException { | ||
if (in.getVersion().onOrAfter(Version.V_8_0_0)) { | ||
this.name = in.readString(); | ||
this.type = in.readString(); | ||
this.isSearchable = in.readBoolean(); | ||
this.isAggregatable = in.readBoolean(); | ||
this.meta = in.readMap(StreamInput::readString, StreamInput::readString); | ||
} else { | ||
// Previously we reused the FieldCapabilities class to represent index field capabilities. | ||
FieldCapabilities fieldCaps = new FieldCapabilities(in); | ||
this.name = fieldCaps.getName(); | ||
this.type = fieldCaps.getType(); | ||
this.isSearchable = fieldCaps.isSearchable(); | ||
this.isAggregatable = fieldCaps.isAggregatable(); | ||
this.meta = fieldCaps.meta().entrySet().stream().collect(Collectors.toMap( | ||
Map.Entry::getKey, | ||
entry -> entry.getValue().iterator().next())); | ||
} | ||
} | ||
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@Override | ||
public void writeTo(StreamOutput out) throws IOException { | ||
if (out.getVersion().onOrAfter(Version.V_8_0_0)) { | ||
out.writeString(name); | ||
out.writeString(type); | ||
out.writeBoolean(isSearchable); | ||
out.writeBoolean(isAggregatable); | ||
out.writeMap(meta, StreamOutput::writeString, StreamOutput::writeString); | ||
} else { | ||
// Previously we reused the FieldCapabilities class to represent index field capabilities. | ||
Map<String, Set<String>> wrappedMeta = meta.entrySet().stream().collect(Collectors.toMap( | ||
Map.Entry::getKey, | ||
entry -> Set.of(entry.getValue()))); | ||
FieldCapabilities fieldCaps = new FieldCapabilities(name, type, isSearchable, isAggregatable, null, null, null, wrappedMeta); | ||
fieldCaps.writeTo(out); | ||
} | ||
} | ||
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public String getName() { | ||
return name; | ||
} | ||
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public String getType() { | ||
return type; | ||
} | ||
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public boolean isAggregatable() { | ||
return isAggregatable; | ||
} | ||
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public boolean isSearchable() { | ||
return isSearchable; | ||
} | ||
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public Map<String, String> meta() { | ||
return meta; | ||
} | ||
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@Override | ||
public boolean equals(Object o) { | ||
if (this == o) return true; | ||
if (o == null || getClass() != o.getClass()) return false; | ||
IndexFieldCapabilities that = (IndexFieldCapabilities) o; | ||
return isSearchable == that.isSearchable && | ||
isAggregatable == that.isAggregatable && | ||
Objects.equals(name, that.name) && | ||
Objects.equals(type, that.type) && | ||
Objects.equals(meta, that.meta); | ||
} | ||
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@Override | ||
public int hashCode() { | ||
return Objects.hash(name, type, isSearchable, isAggregatable, meta); | ||
} | ||
} |
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