Java tutorial
/* * 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.usergrid.persistence.collection.mvcc.entity; import org.apache.usergrid.persistence.collection.MvccEntity; import com.google.common.base.Preconditions; import static org.apache.usergrid.persistence.core.util.ValidationUtils.verifyEntityWrite; import static org.apache.usergrid.persistence.core.util.ValidationUtils.verifyIdentity; import static org.apache.usergrid.persistence.core.util.ValidationUtils.verifyTimeUuid; import static org.apache.usergrid.persistence.core.util.ValidationUtils.verifyVersion; /** * Validation Utilities for collection */ public class MvccValidationUtils { /** * Verify the version is correct. Also verifies the contained entity */ public static void verifyMvccEntityWithEntity(MvccEntity entity) { Preconditions.checkNotNull(entity.getEntity().isPresent(), "Entity is required"); verifyVersion(entity.getVersion()); verifyMvccEntityOptionalEntity(entity); } /** * Verify the version is correct. Does not verify the contained entity of it is null */ public static void verifyMvccEntityOptionalEntity(MvccEntity entity) { verifyIdentity(entity.getId()); verifyTimeUuid(entity.getVersion(), "version"); if (entity.getEntity().isPresent()) { verifyEntityWrite(entity.getEntity().orNull()); } } }