| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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.apache.cassandra.cql3.restrictions; |
| |
| import java.nio.ByteBuffer; |
| import java.util.*; |
| |
| import org.apache.cassandra.schema.TableMetadata; |
| import org.apache.cassandra.cql3.QueryOptions; |
| import org.apache.cassandra.cql3.statements.Bound; |
| import org.apache.cassandra.db.ClusteringComparator; |
| import org.apache.cassandra.db.ClusteringPrefix; |
| import org.apache.cassandra.db.MultiCBuilder; |
| import org.apache.cassandra.db.filter.RowFilter; |
| import org.apache.cassandra.index.IndexRegistry; |
| |
| /** |
| * A set of single restrictions on the partition key. |
| * <p>This class can only contains <code>SingleRestriction</code> instances. Token restrictions will be handled by |
| * <code>TokenRestriction</code> class or by the <code>TokenFilter</code> class if the query contains a mix of token |
| * restrictions and single column restrictions on the partition key. |
| */ |
| final class PartitionKeySingleRestrictionSet extends RestrictionSetWrapper implements PartitionKeyRestrictions |
| { |
| /** |
| * The composite type. |
| */ |
| protected final ClusteringComparator comparator; |
| |
| public PartitionKeySingleRestrictionSet(ClusteringComparator comparator) |
| { |
| super(new RestrictionSet()); |
| this.comparator = comparator; |
| } |
| |
| private PartitionKeySingleRestrictionSet(PartitionKeySingleRestrictionSet restrictionSet, |
| SingleRestriction restriction) |
| { |
| super(restrictionSet.restrictions.addRestriction(restriction)); |
| this.comparator = restrictionSet.comparator; |
| } |
| |
| private List<ByteBuffer> toByteBuffers(SortedSet<? extends ClusteringPrefix> clusterings) |
| { |
| List<ByteBuffer> l = new ArrayList<>(clusterings.size()); |
| for (ClusteringPrefix clustering : clusterings) |
| l.add(clustering.serializeAsPartitionKey()); |
| return l; |
| } |
| |
| @Override |
| public PartitionKeyRestrictions mergeWith(Restriction restriction) |
| { |
| if (restriction.isOnToken()) |
| { |
| if (isEmpty()) |
| return (PartitionKeyRestrictions) restriction; |
| |
| return new TokenFilter(this, (TokenRestriction) restriction); |
| } |
| |
| return new PartitionKeySingleRestrictionSet(this, (SingleRestriction) restriction); |
| } |
| |
| @Override |
| public List<ByteBuffer> values(QueryOptions options) |
| { |
| MultiCBuilder builder = MultiCBuilder.create(comparator, hasIN()); |
| for (SingleRestriction r : restrictions) |
| { |
| r.appendTo(builder, options); |
| if (builder.hasMissingElements()) |
| break; |
| } |
| return toByteBuffers(builder.build()); |
| } |
| |
| @Override |
| public List<ByteBuffer> bounds(Bound bound, QueryOptions options) |
| { |
| MultiCBuilder builder = MultiCBuilder.create(comparator, hasIN()); |
| for (SingleRestriction r : restrictions) |
| { |
| r.appendBoundTo(builder, bound, options); |
| if (builder.hasMissingElements()) |
| return Collections.emptyList(); |
| } |
| return toByteBuffers(builder.buildBound(bound.isStart(), true)); |
| } |
| |
| @Override |
| public boolean hasBound(Bound b) |
| { |
| if (isEmpty()) |
| return false; |
| return restrictions.lastRestriction().hasBound(b); |
| } |
| |
| @Override |
| public boolean isInclusive(Bound b) |
| { |
| if (isEmpty()) |
| return false; |
| return restrictions.lastRestriction().isInclusive(b); |
| } |
| |
| @Override |
| public void addRowFilterTo(RowFilter filter, |
| IndexRegistry indexRegistry, |
| QueryOptions options) |
| { |
| for (SingleRestriction restriction : restrictions) |
| { |
| restriction.addRowFilterTo(filter, indexRegistry, options); |
| } |
| } |
| |
| @Override |
| public boolean needFiltering(TableMetadata table) |
| { |
| if (isEmpty()) |
| return false; |
| |
| // slice or has unrestricted key component |
| return hasUnrestrictedPartitionKeyComponents(table) || hasSlice() || hasContains(); |
| } |
| |
| @Override |
| public boolean hasUnrestrictedPartitionKeyComponents(TableMetadata table) |
| { |
| return size() < table.partitionKeyColumns().size(); |
| } |
| |
| @Override |
| public boolean hasSlice() |
| { |
| return restrictions.hasSlice(); |
| } |
| } |