| /* |
| * Copyright (c) 2012, 2021 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 |
| // |
| package org.eclipse.persistence.jpa.jpql.tools; |
| |
| import org.eclipse.persistence.jpa.jpql.ParameterTypeVisitor; |
| import org.eclipse.persistence.jpa.jpql.tools.spi.IType; |
| |
| /** |
| * This visitor calculates the type of an input parameter. |
| * <p> |
| * Provisional API: This interface is part of an interim API that is still under development and |
| * expected to change significantly before reaching stability. It is available at this early stage |
| * to solicit feedback from pioneering adopters on the understanding that any code that uses this |
| * API will almost certainly be broken (repeatedly) as the API evolves. |
| * |
| * @version 2.5 |
| * @since 2.4 |
| * @author Pascal Filion |
| */ |
| public class DefaultParameterTypeVisitor extends ParameterTypeVisitor { |
| |
| /** |
| * The context used to query information about the application metadata and cached information. |
| */ |
| private JPQLQueryContext queryContext; |
| |
| /** |
| * Creates a new <code>DefaultParameterTypeVisitor</code>. |
| * |
| * @param queryContext The context used to query information about the application metadata and |
| * cached information |
| */ |
| public DefaultParameterTypeVisitor(JPQLQueryContext queryContext) { |
| super(); |
| this.queryContext = queryContext; |
| } |
| |
| @Override |
| public IType getType() { |
| |
| // The type should be ignored, use the special constant |
| if (ignoreType) { |
| return queryContext.getTypeHelper().unknownType(); |
| } |
| |
| // The type name was set |
| if (typeName != null) { |
| return queryContext.getType(typeName); |
| } |
| |
| // The calculation couldn't find an expression with a type |
| if (expression == null) { |
| if (type == null) { |
| type = Object.class; |
| } |
| return queryContext.getType(type); |
| } |
| |
| return queryContext.getType(expression); |
| } |
| } |