org.apache.logging.log4j.core.config.plugins.validation.validators.NotBlankValidator Maven / Gradle / Ivy
/*
* 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.logging.log4j.core.config.plugins.validation.validators;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.config.plugins.validation.ConstraintValidator;
import org.apache.logging.log4j.core.config.plugins.validation.constraints.NotBlank;
import org.apache.logging.log4j.status.StatusLogger;
import org.apache.logging.log4j.util.Strings;
/**
* Validator that checks if a {@link CharSequence} is not entirely composed of
* whitespace.
*
* @since 2.18.0
*/
public class NotBlankValidator implements ConstraintValidator {
private static final Logger LOGGER = StatusLogger.getLogger();
private NotBlank annotation;
@Override
public void initialize(final NotBlank anAnnotation) {
this.annotation = anAnnotation;
}
@Override
public boolean isValid(final String name, final Object value) {
return Strings.isNotBlank(name) || err(name);
}
private boolean err(final String name) {
LOGGER.error(annotation.message(), name);
return false;
}
}