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A fork of the Apache Cassandra Project ready to embed Elasticsearch.
/*
* 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.config.CFMetaData;
import org.apache.cassandra.config.ColumnDefinition;
import org.apache.cassandra.cql3.QueryOptions;
import org.apache.cassandra.cql3.functions.Function;
import org.apache.cassandra.cql3.statements.Bound;
import org.apache.cassandra.db.*;
import org.apache.cassandra.db.filter.RowFilter;
import org.apache.cassandra.exceptions.InvalidRequestException;
import org.apache.cassandra.index.SecondaryIndexManager;
import org.apache.cassandra.utils.btree.BTreeSet;
import static org.apache.cassandra.cql3.statements.RequestValidations.invalidRequest;
/**
* A set of single column restrictions on a primary key part (partition key or clustering key).
*/
final class PrimaryKeyRestrictionSet extends AbstractPrimaryKeyRestrictions implements Iterable
{
/**
* The restrictions.
*/
private final RestrictionSet restrictions;
/**
* true if the restrictions are corresponding to an EQ, false otherwise.
*/
private boolean eq;
/**
* true if the restrictions are corresponding to an IN, false otherwise.
*/
private boolean in;
/**
* true if the restrictions are corresponding to a Slice, false otherwise.
*/
private boolean slice;
/**
* true if the restrictions are corresponding to a Contains, false otherwise.
*/
private boolean contains;
/**
* true if the restrictions corresponding to a partition key, false if it's clustering columns.
*/
private boolean isPartitionKey;
public PrimaryKeyRestrictionSet(ClusteringComparator comparator, boolean isPartitionKey)
{
super(comparator);
this.restrictions = new RestrictionSet();
this.eq = true;
this.isPartitionKey = isPartitionKey;
}
private PrimaryKeyRestrictionSet(PrimaryKeyRestrictionSet primaryKeyRestrictions,
Restriction restriction) throws InvalidRequestException
{
super(primaryKeyRestrictions.comparator);
this.restrictions = primaryKeyRestrictions.restrictions.addRestriction(restriction);
this.isPartitionKey = primaryKeyRestrictions.isPartitionKey;
if (restriction.isSlice() || primaryKeyRestrictions.isSlice())
this.slice = true;
else if (restriction.isContains() || primaryKeyRestrictions.isContains())
this.contains = true;
else if (restriction.isIN() || primaryKeyRestrictions.isIN())
this.in = true;
else
this.eq = true;
}
private List toByteBuffers(SortedSet clusterings)
{
// It's currently a tad hard to follow that this is only called for partition key so we should fix that
List l = new ArrayList<>(clusterings.size());
for (ClusteringPrefix clustering : clusterings)
l.add(CFMetaData.serializePartitionKey(clustering));
return l;
}
@Override
public boolean isSlice()
{
return slice;
}
@Override
public boolean isEQ()
{
return eq;
}
@Override
public boolean isIN()
{
return in;
}
@Override
public boolean isOnToken()
{
return false;
}
@Override
public boolean isContains()
{
return contains;
}
@Override
public boolean isMultiColumn()
{
return false;
}
@Override
public void addFunctionsTo(List functions)
{
restrictions.addFunctionsTo(functions);
}
@Override
public PrimaryKeyRestrictions mergeWith(Restriction restriction) throws InvalidRequestException
{
if (restriction.isOnToken())
{
if (isEmpty())
return (PrimaryKeyRestrictions) restriction;
return new TokenFilter(this, (TokenRestriction) restriction);
}
return new PrimaryKeyRestrictionSet(this, restriction);
}
@Override
public NavigableSet valuesAsClustering(QueryOptions options) throws InvalidRequestException
{
return appendTo(MultiCBuilder.create(comparator), options).build();
}
@Override
public MultiCBuilder appendTo(MultiCBuilder builder, QueryOptions options)
{
for (Restriction r : restrictions)
{
r.appendTo(builder, options);
if (builder.hasMissingElements())
break;
}
return builder;
}
@Override
public MultiCBuilder appendBoundTo(MultiCBuilder builder, Bound bound, QueryOptions options)
{
throw new UnsupportedOperationException();
}
@Override
public NavigableSet boundsAsClustering(Bound bound, QueryOptions options) throws InvalidRequestException
{
MultiCBuilder builder = MultiCBuilder.create(comparator);
int keyPosition = 0;
for (Restriction r : restrictions)
{
ColumnDefinition def = r.getFirstColumn();
if (keyPosition != def.position() || r.isContains())
break;
if (r.isSlice())
{
r.appendBoundTo(builder, bound, options);
return builder.buildBoundForSlice(bound.isStart(),
r.isInclusive(bound),
r.isInclusive(bound.reverse()),
r.getColumnDefs());
}
r.appendBoundTo(builder, bound, options);
if (builder.hasMissingElements())
return BTreeSet.empty(comparator);
keyPosition = r.getLastColumn().position() + 1;
}
// Everything was an equal (or there was nothing)
return builder.buildBound(bound.isStart(), true);
}
@Override
public List values(QueryOptions options) throws InvalidRequestException
{
if (!isPartitionKey)
throw new UnsupportedOperationException();
return toByteBuffers(valuesAsClustering(options));
}
@Override
public List bounds(Bound b, QueryOptions options) throws InvalidRequestException
{
if (!isPartitionKey)
throw new UnsupportedOperationException();
return toByteBuffers(boundsAsClustering(b, options));
}
@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 boolean hasSupportingIndex(SecondaryIndexManager indexManager)
{
return restrictions.hasSupportingIndex(indexManager);
}
@Override
public void addRowFilterTo(RowFilter filter,
SecondaryIndexManager indexManager,
QueryOptions options) throws InvalidRequestException
{
int position = 0;
for (Restriction restriction : restrictions)
{
// We ignore all the clustering columns that can be handled by slices.
if (isPartitionKey || handleInFilter(restriction, position) || restriction.hasSupportingIndex(indexManager))
{
restriction.addRowFilterTo(filter, indexManager, options);
continue;
}
if (!restriction.isSlice())
position = restriction.getLastColumn().position() + 1;
}
}
@Override
public List getColumnDefs()
{
return restrictions.getColumnDefs();
}
@Override
public ColumnDefinition getFirstColumn()
{
return restrictions.firstColumn();
}
@Override
public ColumnDefinition getLastColumn()
{
return restrictions.lastColumn();
}
public final boolean needsFiltering()
{
// Backported from ClusteringColumnRestrictions from CASSANDRA-11310 for 3.6
// As that suggests, this should only be called on clustering column
// and not partition key restrictions.
int position = 0;
for (Restriction restriction : restrictions)
{
if (handleInFilter(restriction, position))
return true;
if (!restriction.isSlice())
position = restriction.getLastColumn().position() + 1;
}
return false;
}
private boolean handleInFilter(Restriction restriction, int index)
{
return restriction.isContains() || index != restriction.getFirstColumn().position();
}
public Iterator iterator()
{
return restrictions.iterator();
}
}