| /* |
| * 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.functions; |
| |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Optional; |
| |
| import com.datastax.driver.core.DataType; |
| import com.datastax.driver.core.TupleType; |
| import com.datastax.driver.core.TupleValue; |
| import com.datastax.driver.core.TypeCodec; |
| import com.datastax.driver.core.UDTValue; |
| import com.datastax.driver.core.UserType; |
| import org.apache.cassandra.cql3.ColumnIdentifier; |
| import org.apache.cassandra.db.marshal.AbstractType; |
| import org.apache.cassandra.schema.CQLTypeParser; |
| import org.apache.cassandra.schema.KeyspaceMetadata; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| /** |
| * Package private implementation of {@link UDFContext} |
| */ |
| public final class UDFContextImpl implements UDFContext |
| { |
| private final KeyspaceMetadata keyspaceMetadata; |
| private final Map<String, TypeCodec<Object>> byName = new HashMap<>(); |
| private final TypeCodec<Object>[] argCodecs; |
| private final TypeCodec<Object> returnCodec; |
| |
| UDFContextImpl(List<ColumnIdentifier> argNames, TypeCodec<Object>[] argCodecs, TypeCodec<Object> returnCodec, |
| KeyspaceMetadata keyspaceMetadata) |
| { |
| for (int i = 0; i < argNames.size(); i++) |
| byName.put(argNames.get(i).toString(), argCodecs[i]); |
| this.argCodecs = argCodecs; |
| this.returnCodec = returnCodec; |
| this.keyspaceMetadata = keyspaceMetadata; |
| } |
| |
| public UDTValue newArgUDTValue(String argName) |
| { |
| return newUDTValue(codecFor(argName)); |
| } |
| |
| public UDTValue newArgUDTValue(int argNum) |
| { |
| return newUDTValue(codecFor(argNum)); |
| } |
| |
| public UDTValue newReturnUDTValue() |
| { |
| return newUDTValue(returnCodec); |
| } |
| |
| public UDTValue newUDTValue(String udtName) |
| { |
| Optional<org.apache.cassandra.db.marshal.UserType> udtType = keyspaceMetadata.types.get(ByteBufferUtil.bytes(udtName)); |
| DataType dataType = UDHelper.driverType(udtType.orElseThrow( |
| () -> new IllegalArgumentException("No UDT named " + udtName + " in keyspace " + keyspaceMetadata.name) |
| )); |
| return newUDTValue(dataType); |
| } |
| |
| public TupleValue newArgTupleValue(String argName) |
| { |
| return newTupleValue(codecFor(argName)); |
| } |
| |
| public TupleValue newArgTupleValue(int argNum) |
| { |
| return newTupleValue(codecFor(argNum)); |
| } |
| |
| public TupleValue newReturnTupleValue() |
| { |
| return newTupleValue(returnCodec); |
| } |
| |
| public TupleValue newTupleValue(String cqlDefinition) |
| { |
| AbstractType<?> abstractType = CQLTypeParser.parse(keyspaceMetadata.name, cqlDefinition, keyspaceMetadata.types); |
| DataType dataType = UDHelper.driverType(abstractType); |
| return newTupleValue(dataType); |
| } |
| |
| private TypeCodec<Object> codecFor(int argNum) |
| { |
| if (argNum < 0 || argNum >= argCodecs.length) |
| throw new IllegalArgumentException("Function does not declare an argument with index " + argNum); |
| return argCodecs[argNum]; |
| } |
| |
| private TypeCodec<Object> codecFor(String argName) |
| { |
| TypeCodec<Object> codec = byName.get(argName); |
| if (codec == null) |
| throw new IllegalArgumentException("Function does not declare an argument named '" + argName + '\''); |
| return codec; |
| } |
| |
| private static UDTValue newUDTValue(TypeCodec<Object> codec) |
| { |
| DataType dataType = codec.getCqlType(); |
| return newUDTValue(dataType); |
| } |
| |
| private static UDTValue newUDTValue(DataType dataType) |
| { |
| if (!(dataType instanceof UserType)) |
| throw new IllegalStateException("Function argument is not a UDT but a " + dataType.getName()); |
| UserType userType = (UserType) dataType; |
| return userType.newValue(); |
| } |
| |
| private static TupleValue newTupleValue(TypeCodec<Object> codec) |
| { |
| DataType dataType = codec.getCqlType(); |
| return newTupleValue(dataType); |
| } |
| |
| private static TupleValue newTupleValue(DataType dataType) |
| { |
| if (!(dataType instanceof TupleType)) |
| throw new IllegalStateException("Function argument is not a tuple type but a " + dataType.getName()); |
| TupleType tupleType = (TupleType) dataType; |
| return tupleType.newValue(); |
| } |
| } |