| /* |
| * 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.xr; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.eclipse.persistence.exceptions.DynamicException; |
| |
| public class XRFieldInfo { |
| |
| protected HashMap<String, Index> fieldInfo = new HashMap<String, Index>(); |
| |
| public XRFieldInfo() { |
| super(); |
| } |
| |
| public int numFields() { |
| return fieldInfo.size(); |
| } |
| |
| public void addFieldInfo(String fieldName, int idx) { |
| fieldInfo.put(fieldName, new Index(idx)); |
| } |
| |
| public int getFieldIdx(String fieldName) { |
| Index i = fieldInfo.get(fieldName); |
| if (i == null) { |
| throw DynamicException.invalidPropertyName(null, fieldName); |
| } |
| return i.idx; |
| } |
| |
| public String getFieldName(int fieldIdx) { |
| String fieldName = null; |
| for (Map.Entry<String, Index> me : fieldInfo.entrySet()) { |
| if (me.getValue().idx == fieldIdx) { |
| fieldName = me.getKey(); |
| break; |
| } |
| } |
| return fieldName; |
| } |
| |
| // Made static final for performance reasons. |
| private static final class Index { |
| int idx; |
| public Index(int idx) { |
| this.idx = idx; |
| } |
| } |
| } |