This is an automated email from the ASF dual-hosted git repository. hui pushed a commit to branch lmh/TypeProviderOpt in repository https://gitbox.apache.org/repos/asf/iotdb.git
commit dbb75b59af70caab4b2db9417a4c6081a938146e Author: Minghui Liu <[email protected]> AuthorDate: Thu Sep 1 15:51:11 2022 +0800 add NodeRef --- .../org/apache/iotdb/db/mpp/common/NodeRef.java | 55 ++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/server/src/main/java/org/apache/iotdb/db/mpp/common/NodeRef.java b/server/src/main/java/org/apache/iotdb/db/mpp/common/NodeRef.java new file mode 100644 index 0000000000..761984d3dd --- /dev/null +++ b/server/src/main/java/org/apache/iotdb/db/mpp/common/NodeRef.java @@ -0,0 +1,55 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.iotdb.db.mpp.common; + +import org.apache.iotdb.db.mpp.plan.statement.StatementNode; + +import static java.lang.System.identityHashCode; +import static java.util.Objects.requireNonNull; + +public class NodeRef<T extends StatementNode> { + + private final T node; + + public NodeRef(T node) { + this.node = requireNonNull(node, "node is null"); + } + + public static <T extends StatementNode> NodeRef<T> of(T node) { + return new NodeRef<>(node); + } + + @Override + public boolean equals(Object o) { + if (this == o) { + return true; + } + if (o == null || getClass() != o.getClass()) { + return false; + } + NodeRef<?> other = (NodeRef<?>) o; + return node == other.node; + } + + @Override + public int hashCode() { + return identityHashCode(node); + } +}
