| /* |
| * 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 |
| * |
| * https://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.avro; |
| |
| import java.util.Iterator; |
| |
| /** |
| * <p> |
| * A {@link SchemaValidator} for validating the provided schema against the |
| * first {@link Schema} in the iterable in {@link #validate(Schema, Iterable)}. |
| * </p> |
| * <p> |
| * Uses the {@link SchemaValidationStrategy} provided in the constructor to |
| * validate the schema against the first Schema in the iterable, if it exists, |
| * via {@link SchemaValidationStrategy#validate(Schema, Schema)}. |
| * </p> |
| */ |
| public final class ValidateLatest implements SchemaValidator { |
| private final SchemaValidationStrategy strategy; |
| |
| /** |
| * @param strategy The strategy to use for validation of pairwise schemas. |
| */ |
| public ValidateLatest(SchemaValidationStrategy strategy) { |
| this.strategy = strategy; |
| } |
| |
| @Override |
| public void validate(Schema toValidate, Iterable<Schema> schemasInOrder) throws SchemaValidationException { |
| Iterator<Schema> schemas = schemasInOrder.iterator(); |
| if (schemas.hasNext()) { |
| Schema existing = schemas.next(); |
| strategy.validate(toValidate, existing); |
| } |
| } |
| |
| } |