Java tutorial
/** * Copyright 2013-2018 the original author or authors from the Jeddict project (https://jeddict.github.io/). * * Licensed 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 io.github.jeddict.jpa.spec.validator.column; import java.util.List; import org.apache.commons.lang.StringUtils; import io.github.jeddict.jpa.spec.PrimaryKeyJoinColumn; import io.github.jeddict.jpa.spec.validator.MarshalValidator; public class PrimaryKeyJoinColumnValidator extends MarshalValidator<PrimaryKeyJoinColumn> { @Override public PrimaryKeyJoinColumn marshal(PrimaryKeyJoinColumn column) throws Exception { if (column != null && isEmpty(column)) { return null; } return column; } public static boolean isEmpty(PrimaryKeyJoinColumn column) { boolean empty = false; if (StringUtils.isBlank(column.getName()) && StringUtils.isBlank(column.getReferencedColumnName()) && StringUtils.isBlank(column.getColumnDefinition()) && ForeignKeyValidator.isEmpty(column.getForeignKey())) { empty = true; } if (!empty && StringUtils.isBlank(column.getName()) && StringUtils.isNotBlank(column.getImplicitName())) { column.setName(column.getImplicitName()); column.setImplicitName(null); } if (!empty && StringUtils.isBlank(column.getName())) { empty = true; } return empty; } public static boolean isNotEmpty(PrimaryKeyJoinColumn column) { return !isEmpty(column); } /** * Remove empty/invalid PrimaryKeyJoinColumn * * @param columns */ public static void filter(List<PrimaryKeyJoinColumn> columns) { columns.removeIf(PrimaryKeyJoinColumnValidator::isEmpty); } }