| /* |
| * 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.nifi.avro; |
| |
| import org.apache.avro.Schema; |
| import org.apache.nifi.components.ValidationContext; |
| import org.apache.nifi.components.ValidationResult; |
| import org.apache.nifi.components.Validator; |
| |
| public class AvroSchemaValidator implements Validator { |
| |
| @Override |
| public ValidationResult validate(final String subject, final String input, final ValidationContext context) { |
| if (context.isExpressionLanguageSupported(subject) && context.isExpressionLanguagePresent(input)) { |
| return new ValidationResult.Builder() |
| .input(input) |
| .subject(subject) |
| .valid(true) |
| .explanation("Expression Language is present") |
| .build(); |
| } |
| |
| try { |
| new Schema.Parser().parse(input); |
| |
| return new ValidationResult.Builder() |
| .valid(true) |
| .build(); |
| } catch (final Exception e) { |
| return new ValidationResult.Builder() |
| .input(input) |
| .subject(subject) |
| .valid(false) |
| .explanation("Not a valid Avro Schema: " + e.getMessage()) |
| .build(); |
| } |
| } |
| |
| } |
