| /* |
| * 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.ignite.internal.processors.query; |
| |
| import org.apache.ignite.internal.processors.cache.GridCacheOperation; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Operations on entries which could be performed during transaction. |
| * Operations are used during SQL statements execution, but does not define exact SQL statements semantics. |
| * It is better to treat them independently and having their own semantics. |
| */ |
| public enum EnlistOperation { |
| /** |
| * This operation creates entry if it does not exist or raises visible failure otherwise. |
| */ |
| INSERT(GridCacheOperation.CREATE), |
| /** |
| * This operation creates entry if it does not exist or modifies existing one otherwise. |
| */ |
| UPSERT(GridCacheOperation.UPDATE), |
| /** |
| * This operation modifies existing entry or does nothing if entry does not exist. |
| */ |
| UPDATE(GridCacheOperation.UPDATE), |
| /** |
| * This operation deletes existing entry or does nothing if entry does not exist. |
| */ |
| DELETE(GridCacheOperation.DELETE), |
| /** |
| * This operation locks existing entry protecting it from updates by other transactions |
| * or does notrhing if entry does not exist. |
| */ |
| LOCK(null), |
| /** |
| * This operation applies entry transformer. |
| */ |
| TRANSFORM(GridCacheOperation.UPDATE); |
| |
| /** */ |
| private final GridCacheOperation cacheOp; |
| |
| /** */ |
| EnlistOperation(GridCacheOperation cacheOp) { |
| this.cacheOp = cacheOp; |
| } |
| |
| /** |
| * @return Corresponding Cache operation. |
| */ |
| public GridCacheOperation cacheOperation() { |
| return cacheOp; |
| } |
| |
| /** */ |
| public boolean isDeleteOrLock() { |
| return this == DELETE || this == LOCK; |
| } |
| |
| /** */ |
| public boolean isInvoke() { |
| return this == TRANSFORM; |
| } |
| |
| /** |
| * Indicates that an operation cannot create new row. |
| */ |
| public boolean noCreate() { |
| // has no meaning for LOCK |
| assert this != LOCK; |
| |
| return this == UPDATE || this == DELETE; |
| } |
| |
| /** Enum values. */ |
| private static final EnlistOperation[] VALS = values(); |
| |
| /** |
| * @param ord Ordinal value. |
| * @return Enum value. |
| */ |
| @Nullable public static EnlistOperation fromOrdinal(int ord) { |
| return ord < 0 || ord >= VALS.length ? null : VALS[ord]; |
| } |
| } |