| /* |
| * 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.druid.math.expr; |
| |
| import com.google.common.collect.ImmutableSet; |
| import org.apache.druid.common.config.NullHandling; |
| import org.apache.druid.java.util.common.IAE; |
| import org.apache.druid.java.util.common.StringUtils; |
| import org.apache.druid.math.expr.vector.ExprVectorProcessor; |
| import org.apache.druid.math.expr.vector.VectorMathProcessors; |
| |
| import javax.annotation.Nullable; |
| import java.util.Objects; |
| |
| /** |
| * Base type for all single argument operators, with a single {@link Expr} child for the operand. |
| */ |
| abstract class UnaryExpr implements Expr |
| { |
| final String op; |
| final Expr expr; |
| |
| UnaryExpr(String op, Expr expr) |
| { |
| this.op = op; |
| this.expr = expr; |
| } |
| |
| abstract UnaryExpr copy(Expr expr); |
| |
| @Override |
| public Expr visit(Shuttle shuttle) |
| { |
| Expr newExpr = expr.visit(shuttle); |
| //noinspection ObjectEquality (checking for object equality here is intentional) |
| if (newExpr != expr) { |
| return shuttle.visit(copy(newExpr)); |
| } |
| return shuttle.visit(this); |
| } |
| |
| @Override |
| public BindingAnalysis analyzeInputs() |
| { |
| // currently all unary operators only operate on scalar inputs |
| return expr.analyzeInputs().withScalarArguments(ImmutableSet.of(expr)); |
| } |
| |
| @Nullable |
| @Override |
| public ExprType getOutputType(InputBindingInspector inspector) |
| { |
| return expr.getOutputType(inspector); |
| } |
| |
| @Override |
| public boolean equals(Object o) |
| { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| UnaryExpr unaryExpr = (UnaryExpr) o; |
| return Objects.equals(expr, unaryExpr.expr); |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return Objects.hash(expr); |
| } |
| |
| @Override |
| public String stringify() |
| { |
| return StringUtils.format("%s%s", op, expr.stringify()); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return StringUtils.format("%s%s", op, expr); |
| } |
| } |
| |
| class UnaryMinusExpr extends UnaryExpr |
| { |
| UnaryMinusExpr(String op, Expr expr) |
| { |
| super(op, expr); |
| } |
| |
| @Override |
| UnaryExpr copy(Expr expr) |
| { |
| return new UnaryMinusExpr(op, expr); |
| } |
| |
| @Override |
| public ExprEval eval(ObjectBinding bindings) |
| { |
| ExprEval ret = expr.eval(bindings); |
| if (NullHandling.sqlCompatible() && (ret.value() == null)) { |
| return ExprEval.of(null); |
| } |
| if (ret.type() == ExprType.LONG) { |
| return ExprEval.of(-ret.asLong()); |
| } |
| if (ret.type() == ExprType.DOUBLE) { |
| return ExprEval.of(-ret.asDouble()); |
| } |
| throw new IAE("unsupported type " + ret.type()); |
| } |
| |
| @Override |
| public boolean canVectorize(InputBindingInspector inspector) |
| { |
| return inspector.areNumeric(expr) && expr.canVectorize(inspector); |
| } |
| |
| @Override |
| public <T> ExprVectorProcessor<T> buildVectorized(VectorInputBindingInspector inspector) |
| { |
| return VectorMathProcessors.negate(inspector, expr); |
| } |
| } |
| |
| class UnaryNotExpr extends UnaryExpr |
| { |
| UnaryNotExpr(String op, Expr expr) |
| { |
| super(op, expr); |
| } |
| |
| @Override |
| UnaryExpr copy(Expr expr) |
| { |
| return new UnaryNotExpr(op, expr); |
| } |
| |
| @Override |
| public ExprEval eval(ObjectBinding bindings) |
| { |
| ExprEval ret = expr.eval(bindings); |
| if (NullHandling.sqlCompatible() && (ret.value() == null)) { |
| return ExprEval.of(null); |
| } |
| // conforming to other boolean-returning binary operators |
| ExprType retType = ret.type() == ExprType.DOUBLE ? ExprType.DOUBLE : ExprType.LONG; |
| return ExprEval.ofBoolean(!ret.asBoolean(), retType); |
| } |
| |
| @Nullable |
| @Override |
| public ExprType getOutputType(InputBindingInspector inspector) |
| { |
| ExprType implicitCast = super.getOutputType(inspector); |
| if (ExprType.STRING.equals(implicitCast)) { |
| return ExprType.LONG; |
| } |
| return implicitCast; |
| } |
| } |