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Elasticsearch subproject :server
/*
* 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.internal;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryRewriteContext;
import org.elasticsearch.index.query.Rewriteable;
import java.io.IOException;
import java.util.Arrays;
import java.util.Objects;
/**
* Represents a {@link QueryBuilder} and a list of alias names that filters the builder is composed of.
*/
public final class AliasFilter implements Writeable, Rewriteable {
private final String[] aliases;
private final QueryBuilder filter;
public static final AliasFilter EMPTY = new AliasFilter(null, Strings.EMPTY_ARRAY);
public AliasFilter(QueryBuilder filter, String... aliases) {
this.aliases = aliases == null ? Strings.EMPTY_ARRAY : aliases;
this.filter = filter;
}
public AliasFilter(StreamInput input) throws IOException {
aliases = input.readStringArray();
filter = input.readOptionalNamedWriteable(QueryBuilder.class);
}
@Override
public AliasFilter rewrite(QueryRewriteContext context) throws IOException {
QueryBuilder queryBuilder = this.filter;
if (queryBuilder != null) {
QueryBuilder rewrite = Rewriteable.rewrite(queryBuilder, context);
if (rewrite != queryBuilder) {
return new AliasFilter(rewrite, aliases);
}
}
return this;
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeStringArray(aliases);
out.writeOptionalNamedWriteable(filter);
}
/**
* Returns the aliases patters that are used to compose the {@link QueryBuilder}
* returned from {@link #getQueryBuilder()}
*/
public String[] getAliases() {
return aliases;
}
/**
* Returns the alias filter {@link QueryBuilder} or null
if there is no such filter
*/
public QueryBuilder getQueryBuilder() {
return filter;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
AliasFilter that = (AliasFilter) o;
return Arrays.equals(aliases, that.aliases) && Objects.equals(filter, that.filter);
}
@Override
public int hashCode() {
return Objects.hash(Arrays.hashCode(aliases), filter);
}
@Override
public String toString() {
return "AliasFilter{" + "aliases=" + Arrays.toString(aliases) + ", filter=" + filter + '}';
}
}