| /* |
| * Copyright (c) 1998, 2020 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // Oracle - initial API and implementation from Oracle TopLink |
| package org.eclipse.persistence.internal.jpa.parsing; |
| |
| import org.eclipse.persistence.expressions.*; |
| import org.eclipse.persistence.queries.ObjectLevelReadQuery; |
| import org.eclipse.persistence.queries.ReportQuery; |
| |
| /** |
| * INTERNAL |
| * <p><b>Purpose</b>: Represent a '/' in EJBQL |
| * <p><b>Responsibilities</b>:<ul> |
| * <li> Generate the correct expression for a '/' |
| * </ul> |
| * @author Jon Driscoll and Joel Lucuik |
| * @since July 2003 |
| */ |
| public class DivideNode extends BinaryOperatorNode implements AliasableNode { |
| public DivideNode() { |
| super(); |
| } |
| |
| /** |
| * INTERNAL |
| * Apply this node to the passed query |
| */ |
| @Override |
| public void applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext context) { |
| if (theQuery.isReportQuery()) { |
| ReportQuery reportQuery = (ReportQuery)theQuery; |
| reportQuery.addAttribute("divide", generateExpression(context), (Class)getType()); |
| } |
| } |
| |
| /** |
| * INTERNAL |
| * Validate node and calculates its type. |
| */ |
| @Override |
| public void validate(ParseTreeContext context) { |
| super.validate(context); |
| if ((left != null) && (right != null)) { |
| TypeHelper typeHelper = context.getTypeHelper(); |
| setType(typeHelper.extendedBinaryNumericPromotion( |
| left.getType(), right.getType())); |
| } |
| } |
| |
| /** |
| * INTERNAL |
| * Generate the expression. The steps are: |
| * 1. Generate the expression for the left node |
| * 2. Add the .divide to the where clause returned from step 1 |
| * 3. Generate the expression for the right side and use it as the parameter for the .divide() |
| * 4. Return the completed where clause to the caller |
| */ |
| @Override |
| public Expression generateExpression(GenerationContext context) { |
| Expression whereClause = getLeft().generateExpression(context); |
| whereClause = ExpressionMath.divide(whereClause, getRight().generateExpression(context)); |
| return whereClause; |
| } |
| |
| @Override |
| public boolean isDivideNode() { |
| return true; |
| } |
| |
| @Override |
| public boolean isAliasableNode(){ |
| return true; |
| } |
| } |