| /* |
| * 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.selection; |
| |
| import java.nio.ByteBuffer; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| import org.apache.cassandra.schema.ColumnMetadata; |
| import org.apache.cassandra.cql3.ColumnSpecification; |
| import org.apache.cassandra.cql3.FieldIdentifier; |
| import org.apache.cassandra.cql3.QueryOptions; |
| import org.apache.cassandra.cql3.UserTypes; |
| import org.apache.cassandra.cql3.functions.Function; |
| import org.apache.cassandra.db.filter.ColumnFilter; |
| import org.apache.cassandra.db.filter.ColumnFilter.Builder; |
| import org.apache.cassandra.db.marshal.AbstractType; |
| import org.apache.cassandra.db.marshal.TupleType; |
| import org.apache.cassandra.db.marshal.UserType; |
| import org.apache.cassandra.exceptions.InvalidRequestException; |
| import org.apache.cassandra.transport.ProtocolVersion; |
| |
| /** |
| * <code>Selector</code> for literal map (e.g. {'min' : min(value), 'max' : max(value), 'count' : count(value)}). |
| * |
| */ |
| final class UserTypeSelector extends Selector |
| { |
| /** |
| * The map type. |
| */ |
| private final AbstractType<?> type; |
| |
| /** |
| * The user type fields |
| */ |
| private final Map<FieldIdentifier, Selector> fields; |
| |
| public static Factory newFactory(final AbstractType<?> type, final Map<FieldIdentifier, Factory> factories) |
| { |
| return new Factory() |
| { |
| protected String getColumnName() |
| { |
| return UserTypes.userTypeToString(factories, Factory::getColumnName); |
| } |
| |
| protected AbstractType<?> getReturnType() |
| { |
| return type; |
| } |
| |
| protected final void addColumnMapping(SelectionColumnMapping mapping, ColumnSpecification resultsColumn) |
| { |
| SelectionColumnMapping tmpMapping = SelectionColumnMapping.newMapping(); |
| for (Factory factory : factories.values()) |
| { |
| factory.addColumnMapping(tmpMapping, resultsColumn); |
| } |
| |
| if (tmpMapping.getMappings().get(resultsColumn).isEmpty()) |
| // add a null mapping for cases where the collection is empty |
| mapping.addMapping(resultsColumn, (ColumnMetadata)null); |
| else |
| // collate the mapped columns from the child factories & add those |
| mapping.addMapping(resultsColumn, tmpMapping.getMappings().values()); |
| } |
| |
| public Selector newInstance(final QueryOptions options) |
| { |
| Map<FieldIdentifier, Selector> fields = new HashMap<>(factories.size()); |
| for (Entry<FieldIdentifier, Factory> factory : factories.entrySet()) |
| fields.put(factory.getKey(), factory.getValue().newInstance(options)); |
| |
| return new UserTypeSelector(type, fields); |
| } |
| |
| @Override |
| public boolean isAggregateSelectorFactory() |
| { |
| for (Factory factory : factories.values()) |
| { |
| if (factory.isAggregateSelectorFactory()) |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public void addFunctionsTo(List<Function> functions) |
| { |
| for (Factory factory : factories.values()) |
| factory.addFunctionsTo(functions); |
| } |
| |
| @Override |
| public boolean isWritetimeSelectorFactory() |
| { |
| for (Factory factory : factories.values()) |
| { |
| if (factory.isWritetimeSelectorFactory()) |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean isTTLSelectorFactory() |
| { |
| for (Factory factory : factories.values()) |
| { |
| if (factory.isTTLSelectorFactory()) |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| boolean areAllFetchedColumnsKnown() |
| { |
| for (Factory factory : factories.values()) |
| { |
| if (!factory.areAllFetchedColumnsKnown()) |
| return false; |
| } |
| return true; |
| } |
| |
| @Override |
| void addFetchedColumns(Builder builder) |
| { |
| for (Factory factory : factories.values()) |
| factory.addFetchedColumns(builder); |
| } |
| }; |
| } |
| |
| public void addFetchedColumns(ColumnFilter.Builder builder) |
| { |
| for (Selector field : fields.values()) |
| field.addFetchedColumns(builder); |
| } |
| |
| public void addInput(ProtocolVersion protocolVersion, ResultSetBuilder rs) throws InvalidRequestException |
| { |
| for (Selector field : fields.values()) |
| field.addInput(protocolVersion, rs); |
| } |
| |
| public ByteBuffer getOutput(ProtocolVersion protocolVersion) throws InvalidRequestException |
| { |
| UserType userType = (UserType) type; |
| ByteBuffer[] buffers = new ByteBuffer[userType.size()]; |
| for (int i = 0, m = userType.size(); i < m; i++) |
| { |
| Selector selector = fields.get(userType.fieldName(i)); |
| if (selector != null) |
| buffers[i] = selector.getOutput(protocolVersion); |
| } |
| return TupleType.buildValue(buffers); |
| } |
| |
| public void reset() |
| { |
| for (Selector field : fields.values()) |
| field.reset(); |
| } |
| |
| public AbstractType<?> getType() |
| { |
| return type; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return UserTypes.userTypeToString(fields); |
| } |
| |
| private UserTypeSelector(AbstractType<?> type, Map<FieldIdentifier, Selector> fields) |
| { |
| this.type = type; |
| this.fields = fields; |
| } |
| } |