| /* |
| * Copyright (c) 1998, 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 from Oracle TopLink |
| // 08/24/2012-2.5 Guy Pelletier |
| // - 350487: JPA 2.1 Specification defined support for Stored Procedure Calls |
| package org.eclipse.persistence.queries; |
| |
| import org.eclipse.persistence.internal.helper.DatabaseField; |
| import org.eclipse.persistence.internal.localization.ExceptionLocalization; |
| import org.eclipse.persistence.sessions.DatabaseRecord; |
| |
| /** |
| * <p><b>Purpose</b>: |
| * Concrete class to represent the ColumnResult structure as defined by |
| * the EJB 3.0 Persistence specification. This class is a subcomponent of the |
| * EntityResult |
| * |
| * @see EntityResult |
| * @author Gordon Yorke |
| * @since TopLink Java Essentials |
| */ |
| |
| public class ColumnResult extends SQLResult{ |
| |
| /** Stores the Columns name from the result set */ |
| protected DatabaseField column; |
| |
| public ColumnResult(DatabaseField column){ |
| if (column == null || column.getName() == null ){ |
| throw new IllegalArgumentException(ExceptionLocalization.buildMessage("null_value_for_column_result")); |
| } |
| this.column = column; |
| } |
| |
| public ColumnResult(String column){ |
| if (column == null){ |
| throw new IllegalArgumentException(ExceptionLocalization.buildMessage("null_value_for_column_result")); |
| } |
| this.column = new DatabaseField(column); |
| } |
| |
| /** |
| * INTERNAL: |
| * Convert all the class-name-based settings in this query to actual |
| * class-based settings. This method is used when converting a project that |
| * has been built with class names to a project with classes. |
| */ |
| @Override |
| public void convertClassNamesToClasses(ClassLoader classLoader){ |
| super.convertClassNamesToClasses(classLoader); |
| |
| column.convertClassNamesToClasses(classLoader); |
| } |
| |
| public DatabaseField getColumn(){ |
| return this.column; |
| } |
| |
| /** |
| * INTERNAL: |
| * This method is a convenience method for extracting values from Results |
| */ |
| @Override |
| public Object getValueFromRecord(DatabaseRecord record, ResultSetMappingQuery query){ |
| return record.get(this.column); |
| } |
| |
| @Override |
| public boolean isColumnResult(){ |
| return true; |
| } |
| |
| } |