| /* |
| * Copyright (c) 2019 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 |
| */ |
| |
| package org.eclipse.persistence.internal.identitymaps; |
| |
| import java.util.Comparator; |
| |
| import org.eclipse.persistence.internal.helper.ClassConstants; |
| |
| /** |
| * Comparator for CacheIds with array comparison support |
| */ |
| class CacheIdComparator implements Comparator<CacheId> { |
| |
| @Override |
| public int compare(CacheId id1, CacheId id2) { |
| if (id1 == id2) { |
| return 0; |
| } |
| |
| return compareObjectArrays(id1.primaryKey, id2.primaryKey); |
| } |
| |
| private int compareObjectArrays(Object[] array1, Object[] array2) { |
| if (array1.length == array2.length) { |
| for (int index = 0; index < array1.length; index++) { |
| Object value1 = array1[index]; |
| Object value2 = array2[index]; |
| if (value1 == null) { |
| if (value2 != null) { |
| return -1; |
| } else { |
| continue; |
| } |
| } else if (value2 == null) { |
| return 1; |
| } |
| |
| Class value1Class = value1.getClass(); |
| if (value1Class.isArray()) { |
| Class value2Class = value2.getClass(); |
| if (value1Class == ClassConstants.APBYTE && value2Class == ClassConstants.APBYTE) { |
| int result = compareByteArrays((byte[])value1, (byte[])value2); |
| if (result != 0) { |
| return result; |
| } |
| } else if (value1Class == ClassConstants.APCHAR && value2Class == ClassConstants.APCHAR) { |
| int result = compareCharArrays((char[])value1, (char[])value2); |
| if (result != 0) { |
| return result; |
| } |
| } else { |
| int result = compareObjectArrays((Object[])value1, (Object[])value2); |
| if (result != 0) { |
| return result; |
| } |
| } |
| } else { |
| try { |
| int compareTo = ((Comparable)value1).compareTo(value2); |
| if (compareTo != 0) { |
| return compareTo; |
| } |
| } catch (Exception exception) { |
| int result = value1.hashCode() - value2.hashCode(); |
| if (result != 0) { |
| return result > 0 ? 1 : -1; |
| } |
| } |
| } |
| } |
| return 0; |
| } else { |
| return array1.length > array2.length ? 1 : -1; |
| } |
| |
| } |
| |
| private int compareCharArrays(char[] array1, char[] array2) { |
| if (array1.length == array2.length) { |
| for (int index = 0; index < array1.length; index++) { |
| if (array1[index] != array2[index]) { |
| return array1[index] > array2[index] ? 1 : -1; |
| } |
| } |
| return 0; |
| } else { |
| return array1.length > array2.length ? 1 : -1; |
| } |
| } |
| |
| private int compareByteArrays(byte[] array1, byte[] array2) { |
| if (array1.length == array2.length) { |
| for (int index = 0; index < array1.length; index++) { |
| if (array1[index] != array2[index]) { |
| return array1[index] > array2[index] ? 1 : -1; |
| } |
| } |
| return 0; |
| } else { |
| return array1.length > array2.length ? 1 : -1; |
| } |
| } |
| } |