mike-tr-adamson commented on code in PR #2310: URL: https://github.com/apache/cassandra/pull/2310#discussion_r1205391570
########## src/java/org/apache/cassandra/cql3/Vectors.java: ########## @@ -0,0 +1,176 @@ +/* + * 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; + +import java.nio.ByteBuffer; +import java.util.ArrayList; +import java.util.List; + +import org.apache.cassandra.cql3.functions.Function; +import org.apache.cassandra.db.marshal.AbstractType; +import org.apache.cassandra.db.marshal.VectorType; +import org.apache.cassandra.exceptions.InvalidRequestException; +import org.apache.cassandra.transport.ProtocolVersion; +import org.apache.cassandra.utils.ByteBufferUtil; + +public class Vectors +{ + private Vectors() {} + + private static AbstractType<?> elementsType(AbstractType<?> type) + { + return ((VectorType<?>) type.unwrap()).getElementsType(); + } + + private static ColumnSpecification valueSpecOf(ColumnSpecification column) + { + return new ColumnSpecification(column.ksName, column.cfName, new ColumnIdentifier("value(" + column.name + ")", true), elementsType(column.type)); + } + + public static class Literal extends Term.Raw + { + private final List<Term.Raw> elements; + + public Literal(List<Term.Raw> elements) + { + this.elements = elements; + } + + @Override + public TestResult testAssignment(String keyspace, ColumnSpecification receiver) + { + if (!(receiver.type instanceof VectorType)) + return AssignmentTestable.TestResult.NOT_ASSIGNABLE; + VectorType<?> type = (VectorType<?>) receiver.type; + if (elements.size() != type.dimension) + return AssignmentTestable.TestResult.NOT_ASSIGNABLE; + ColumnSpecification valueSpec = valueSpecOf(receiver); + return AssignmentTestable.TestResult.testAll(receiver.ksName, valueSpec, elements); + } + + @Override + public Term prepare(String keyspace, ColumnSpecification receiver) throws InvalidRequestException + { + if (!(receiver.type instanceof VectorType)) + throw new InvalidRequestException(String.format("Invalid vector literal for %s of type %s", receiver.name, receiver.type.asCQL3Type())); + VectorType<?> type = (VectorType<?>) receiver.type; + if (elements.size() != type.dimension) + throw new InvalidRequestException(String.format("Invalid vector literal for %s of type %s; expected %d elements, but given %d", receiver.name, receiver.type.asCQL3Type(), type.dimension, elements.size())); + + ColumnSpecification valueSpec = valueSpecOf(receiver); + List<Term> values = new ArrayList<>(elements.size()); + boolean allTerminal = true; + for (Term.Raw rt : elements) + { + if (!rt.testAssignment(keyspace, valueSpec).isAssignable()) + throw new InvalidRequestException(String.format("Invalid vector literal for %s: value %s is not of type %s", receiver.name, rt, valueSpec.type.asCQL3Type())); + + Term t = rt.prepare(keyspace, valueSpec); + + if (t instanceof Term.NonTerminal) + allTerminal = false; + + values.add(t); + } + DelayedValue value = new DelayedValue(type, values); + return allTerminal ? value.bind(QueryOptions.DEFAULT) : value; + } + + @Override + public String getText() + { + return Lists.listToString(elements, Term.Raw::getText); + } + + @Override + public AbstractType<?> getExactTypeIfKnown(String keyspace) + { + // not enough information to know dimension + return null; + } + } + + public static class Value<T> extends Term.MultiItemTerminal + { + public final VectorType<T> type; + public final List<ByteBuffer> elements; + + public Value(VectorType<T> type, List<ByteBuffer> elements) + { + this.type = type; + this.elements = elements; + } + + public ByteBuffer get(ProtocolVersion version) + { + return type.decomposeRaw(elements); + } + + public List<ByteBuffer> getElements() + { + return elements; + } + } + + /** + * Basically similar to a Value, but with some non-pure function (that need + * to be evaluated at execution time) in it. + */ + public static class DelayedValue<T> extends Term.NonTerminal + { + private final VectorType<T> type; + private final List<Term> elements; + + public DelayedValue(VectorType<T> type, List<Term> elements) + { + this.type = type; + this.elements = elements; + } + + public boolean containsBindMarker() + { + return elements.stream().anyMatch(Term::containsBindMarker); + } + + public void collectMarkerSpecification(VariableSpecifications boundNames) + { + elements.forEach(t -> t.collectMarkerSpecification(boundNames)); + } + + public Terminal bind(QueryOptions options) throws InvalidRequestException + { + List<ByteBuffer> buffers = new ArrayList<ByteBuffer>(elements.size()); Review Comment: nit: `List<ByteBuffer> buffers = new ArrayList<>(elements.size);` -- This is an automated message from the Apache Git Service. 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