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LuceneBooleanQuery.java
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LuceneBooleanQuery.java
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/*
* LuceneBooleanQuery.java
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2021-2022 Apple Inc. and the FoundationDB project authors
*
* Licensed 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 com.apple.foundationdb.record.lucene;
import com.apple.foundationdb.annotation.API;
import com.apple.foundationdb.record.EvaluationContext;
import com.apple.foundationdb.record.PlanHashable;
import com.apple.foundationdb.record.metadata.Index;
import com.apple.foundationdb.record.provider.foundationdb.FDBRecordStoreBase;
import com.apple.foundationdb.record.query.plan.cascades.explain.Attribute;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Query;
import javax.annotation.Nonnull;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;
/**
* Binder for a conjunction of other clauses.
*/
@API(API.Status.UNSTABLE)
public class LuceneBooleanQuery extends LuceneQueryClause {
@Nonnull
private final List<LuceneQueryClause> children;
@Nonnull
private final BooleanClause.Occur occur;
public LuceneBooleanQuery(@Nonnull List<LuceneQueryClause> children, @Nonnull BooleanClause.Occur occur) {
this.children = children;
this.occur = occur;
}
@Nonnull
protected List<LuceneQueryClause> getChildren() {
return children;
}
@Nonnull
protected BooleanClause.Occur getOccur() {
return occur;
}
@Override
public Query bind(@Nonnull FDBRecordStoreBase<?> store, @Nonnull Index index, @Nonnull EvaluationContext context) {
BooleanQuery.Builder builder = new BooleanQuery.Builder();
for (LuceneQueryClause child : children) {
builder.add(child.bind(store, index, context), occur);
}
return builder.build();
}
@Override
public void getPlannerGraphDetails(@Nonnull ImmutableList.Builder<String> detailsBuilder, @Nonnull ImmutableMap.Builder<String, Attribute> attributeMapBuilder) {
detailsBuilder.add("occur: {{occur}}");
attributeMapBuilder.put("occur", Attribute.gml(occur));
for (LuceneQueryClause child : children) {
child.getPlannerGraphDetails(detailsBuilder, attributeMapBuilder);
}
}
@Override
public int planHash(@Nonnull final PlanHashKind hashKind) {
return PlanHashable.iterablePlanHash(hashKind, children);
}
@Override
public String toString() {
final String op;
switch (occur) {
case MUST:
op = " AND ";
break;
case SHOULD:
op = " OR ";
break;
default:
op = " " + occur.name() + " ";
break;
}
return children.stream().map(Objects::toString).collect(Collectors.joining(op));
}
}