org.elasticsearch.search.internal.AliasFilter Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* 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.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 +
'}';
}
}