nifi-nar-bundles/nifi-snmp-bundle/nifi-snmp-processors/src/main/java/org/apache/nifi/snmp/validators/OIDValidator.java

/*
 * 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.snmp.validators;

import org.apache.nifi.components.ValidationContext;
import org.apache.nifi.components.ValidationResult;
import org.apache.nifi.components.Validator;

import java.util.regex.Pattern;

public class OIDValidator implements Validator {

    public static final Pattern OID_PATTERN = Pattern.compile("[0-9+.]*");

    @Override
    public ValidationResult validate(final String subject, final String input, final ValidationContext context) {
        final ValidationResult.Builder builder = new ValidationResult.Builder();
        builder.subject(subject).input(input);
        if (context.isExpressionLanguageSupported(subject) && context.isExpressionLanguagePresent(input)) {
            return builder.valid(true).explanation("Contains Expression Language").build();
        }
        try {
            if (OID_PATTERN.matcher(input).matches()) {
                builder.valid(true);
            } else {
                builder.valid(false).explanation(input + " is not a valid OID");
            }
        } catch (final IllegalArgumentException e) {
            builder.valid(false).explanation(e.getMessage());
        }
        return builder.build();
    }
}