90 lines
2.9 KiB
Java
90 lines
2.9 KiB
Java
// Copyright (C) 2018 The Android Open Source Project, 2009-2015 Elasticsearch
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package com.google.gerrit.elasticsearch.builders;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* A Query that matches documents matching boolean combinations of other queries.
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*
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* <p>A trimmed down version of org.elasticsearch.index.query.BoolQueryBuilder.
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*/
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public class BoolQueryBuilder extends QueryBuilder {
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private final List<QueryBuilder> mustClauses = new ArrayList<>();
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private final List<QueryBuilder> mustNotClauses = new ArrayList<>();
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private final List<QueryBuilder> filterClauses = new ArrayList<>();
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private final List<QueryBuilder> shouldClauses = new ArrayList<>();
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/**
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* Adds a query that <b>must</b> appear in the matching documents and will contribute to scoring.
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*/
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public BoolQueryBuilder must(QueryBuilder queryBuilder) {
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mustClauses.add(queryBuilder);
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return this;
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}
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/**
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* Adds a query that <b>must not</b> appear in the matching documents and will not contribute to
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* scoring.
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*/
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public BoolQueryBuilder mustNot(QueryBuilder queryBuilder) {
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mustNotClauses.add(queryBuilder);
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return this;
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}
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/**
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* Adds a query that <i>should</i> appear in the matching documents. For a boolean query with no
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* <tt>MUST</tt> clauses one or more <code>SHOULD</code> clauses must match a document for the
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* BooleanQuery to match.
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*/
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public BoolQueryBuilder should(QueryBuilder queryBuilder) {
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shouldClauses.add(queryBuilder);
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return this;
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}
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@Override
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protected void doXContent(XContentBuilder builder) throws IOException {
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builder.startObject("bool");
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doXArrayContent("must", mustClauses, builder);
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doXArrayContent("filter", filterClauses, builder);
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doXArrayContent("must_not", mustNotClauses, builder);
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doXArrayContent("should", shouldClauses, builder);
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builder.endObject();
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}
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private void doXArrayContent(String field, List<QueryBuilder> clauses, XContentBuilder builder)
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throws IOException {
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if (clauses.isEmpty()) {
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return;
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}
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if (clauses.size() == 1) {
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builder.field(field);
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clauses.get(0).toXContent(builder);
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} else {
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builder.startArray(field);
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for (QueryBuilder clause : clauses) {
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clause.toXContent(builder);
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}
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builder.endArray();
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}
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}
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}
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