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| 1 | +/* |
| 2 | + * Licensed to the Apache Software Foundation (ASF) under one |
| 3 | + * or more contributor license agreements. See the NOTICE file |
| 4 | + * distributed with this work for additional information |
| 5 | + * regarding copyright ownership. The ASF licenses this file |
| 6 | + * to you under the Apache License, Version 2.0 (the |
| 7 | + * "License"); you may not use this file except in compliance |
| 8 | + * with the License. You may obtain a copy of the License at |
| 9 | + * |
| 10 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | + * |
| 12 | + * Unless required by applicable law or agreed to in writing, |
| 13 | + * software distributed under the License is distributed on an |
| 14 | + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | + * KIND, either express or implied. See the License for the |
| 16 | + * specific language governing permissions and limitations |
| 17 | + * under the License. |
| 18 | + */ |
| 19 | + |
| 20 | +package groovy.lang; |
| 21 | + |
| 22 | +import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation; |
| 23 | + |
| 24 | +import java.util.AbstractList; |
| 25 | + |
| 26 | +/** |
| 27 | + * @since 2.5.0 |
| 28 | + */ |
| 29 | +public abstract class AbstractTuple<E> extends AbstractList<E> { |
| 30 | + private int hashCode; |
| 31 | + |
| 32 | + @Override |
| 33 | + public boolean equals(Object o) { |
| 34 | + if (this == o) return true; |
| 35 | + if (o == null || !(o instanceof AbstractTuple)) return false; |
| 36 | + |
| 37 | + AbstractTuple that = (AbstractTuple) o; |
| 38 | + if (size() != that.size()) return false; |
| 39 | + for (int i = 0; i < size(); i++) { |
| 40 | + if (!DefaultTypeTransformation.compareEqual(get(i), that.get(i))) { |
| 41 | + return false; |
| 42 | + } |
| 43 | + } |
| 44 | + return true; |
| 45 | + } |
| 46 | + |
| 47 | + @Override |
| 48 | + public int hashCode() { |
| 49 | + if (hashCode == 0) { |
| 50 | + for (int i = 0; i < size(); i++) { |
| 51 | + Object value = get(i); |
| 52 | + int hash = (value != null) ? value.hashCode() : 0xbabe; |
| 53 | + hashCode ^= hash; |
| 54 | + } |
| 55 | + if (hashCode == 0) { |
| 56 | + hashCode = 0xbabe; |
| 57 | + } |
| 58 | + } |
| 59 | + return hashCode; |
| 60 | + } |
| 61 | +} |
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