001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache license, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the license for the specific language governing permissions and
015 * limitations under the license.
016 */
017package org.apache.logging.log4j.core.config.plugins.validation.validators;
018
019import org.apache.logging.log4j.Logger;
020import org.apache.logging.log4j.core.config.plugins.convert.TypeConverters;
021import org.apache.logging.log4j.core.config.plugins.validation.ConstraintValidator;
022import org.apache.logging.log4j.core.config.plugins.validation.constraints.ValidPort;
023import org.apache.logging.log4j.status.StatusLogger;
024
025/**
026 * Validator that checks an object to verify it is a valid port number (an integer between 0 and 65535).
027 *
028 * @since 2.8
029 */
030public class ValidPortValidator implements ConstraintValidator<ValidPort> {
031
032    private static final Logger LOGGER = StatusLogger.getLogger();
033
034    private ValidPort annotation;
035
036    @Override
037    public void initialize(final ValidPort annotation) {
038        this.annotation = annotation;
039    }
040
041    @Override
042    public boolean isValid(final String name, final Object value) {
043        if (value instanceof CharSequence) {
044            return isValid(name, TypeConverters.convert(value.toString(), Integer.class, -1));
045        }
046        if (!Integer.class.isInstance(value)) {
047            LOGGER.error(annotation.message());
048            return false;
049        }
050        final int port = (int) value;
051        if (port < 0 || port > 65535) {
052            LOGGER.error(annotation.message());
053            return false;
054        }
055        return true;
056    }
057}