| /* |
| * 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.cache; |
| |
| import java.util.Collection; |
| import org.apache.ignite.internal.processors.query.schema.operation.SchemaAbstractOperation; |
| import org.apache.ignite.internal.util.typedef.internal.S; |
| |
| /** |
| * Query entity patch which contain {@link SchemaAbstractOperation} operations for changing query entity. |
| * This patch can only add properties to entity and can't remove them. |
| * Other words, the patch will contain only add operations |
| * (e.g.: |
| * {@link org.apache.ignite.internal.processors.query.schema.operation.SchemaAlterTableAddColumnOperation}, |
| * {@link org.apache.ignite.internal.processors.query.schema.operation.SchemaIndexCreateOperation} |
| * ) and not remove ones. |
| * |
| * It contain only add operation because at the moment we don't have history of schema operations |
| * and by current state we can't understand some property was already deleted or it has not been added yet. |
| */ |
| public class QueryEntityPatch { |
| /** Empty query entity patch. */ |
| private static final QueryEntityPatch EMPTY_QUERY_ENTITY_PATCH = new QueryEntityPatch(null, null); |
| |
| /** Message which described conflicts during creating this patch. */ |
| private String conflictsMessage; |
| |
| /** Operations for modification query entity. */ |
| private Collection<SchemaAbstractOperation> patchOperations; |
| |
| /** |
| * Create patch. |
| */ |
| private QueryEntityPatch(String conflictsMessage, Collection<SchemaAbstractOperation> patchOperations) { |
| this.conflictsMessage = conflictsMessage; |
| this.patchOperations = patchOperations; |
| } |
| |
| /** |
| * Builder method for patch with conflicts. |
| * |
| * @param conflicts Conflicts. |
| * @return Query entity patch with conflicts. |
| */ |
| public static QueryEntityPatch conflict(String conflicts) { |
| return new QueryEntityPatch(conflicts, null); |
| } |
| |
| /** |
| * Builder method for empty patch. |
| * |
| * @return Query entity patch. |
| */ |
| public static QueryEntityPatch empty() { |
| return EMPTY_QUERY_ENTITY_PATCH; |
| } |
| |
| /** |
| * Builder method for patch with operations. |
| * |
| * @param patchOperations Operations for modification. |
| * @return Query entity patch which contain {@link SchemaAbstractOperation} operations for changing query entity. |
| */ |
| public static QueryEntityPatch patch(Collection<SchemaAbstractOperation> patchOperations) { |
| return new QueryEntityPatch(null, patchOperations); |
| } |
| |
| /** |
| * Check for conflict in this patch. |
| * |
| * @return {@code true} if patch has conflict. |
| */ |
| public boolean hasConflict() { |
| return conflictsMessage != null; |
| } |
| |
| /** |
| * @return {@code true} if patch is empty and can't be applying. |
| */ |
| public boolean isEmpty() { |
| return patchOperations == null || patchOperations.isEmpty(); |
| } |
| |
| /** |
| * @return Conflicts. |
| */ |
| public String getConflictsMessage() { |
| return conflictsMessage; |
| } |
| |
| /** |
| * @return Patch operations for applying. |
| */ |
| public Collection<SchemaAbstractOperation> getPatchOperations() { |
| return patchOperations; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public String toString() { |
| return S.toString(QueryEntityPatch.class, this); |
| } |
| } |