| /** |
| * Licensed to jclouds, Inc. (jclouds) under one or more |
| * contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. jclouds 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.jclouds.predicates.validators; |
| |
| import static com.google.common.base.CharMatcher.inRange; |
| import static com.google.common.base.CharMatcher.is; |
| |
| import javax.inject.Inject; |
| import javax.inject.Named; |
| |
| import org.jclouds.predicates.Validator; |
| |
| import com.google.common.base.CharMatcher; |
| import com.google.inject.Singleton; |
| |
| /** |
| * Validates name for dns-style names |
| * |
| * @see org.jclouds.rest.InputParamValidator |
| * @see org.jclouds.predicates.Validator |
| * |
| * @author Adrian Cole |
| */ |
| @Singleton |
| public class DnsNameValidator extends Validator<String> { |
| private int min; |
| private int max; |
| |
| @Inject |
| protected DnsNameValidator(@Named("jclouds.dns_name_length_min") int min, |
| @Named("jclouds.dns_name_length_max") int max) { |
| this.min = min; |
| this.max = max; |
| } |
| |
| public void validate(String name) { |
| |
| if (name == null || name.length() < min || name.length() > max) |
| throw exception(name, "Can't be null or empty. Length must be " + min + " to " + max |
| + " symbols."); |
| if (CharMatcher.JAVA_LETTER_OR_DIGIT.indexIn(name) != 0) |
| throw exception(name, "Should start with letter/number"); |
| if (!name.toLowerCase().equals(name)) |
| throw exception(name, "Should be only lowercase"); |
| |
| /* |
| * The name must be a valid DNS name. From wikipedia: "The characters allowed in a label are a |
| * subset of the ASCII character set, a and includes the characters a through z, A through Z, |
| * digits 0 through 9". From Azure: Every Dash (-) Must Be Immediately Preceded and Followed |
| * by a Letter or Number. |
| */ |
| CharMatcher range = getAcceptableRange(); |
| if (!range.matchesAllOf(name)) |
| throw exception(name, "Should have lowercase ASCII letters, " + "numbers, or dashes"); |
| } |
| |
| protected CharMatcher getAcceptableRange() { |
| return inRange('a', 'z').or(inRange('0', '9').or(is('-'))); |
| } |
| |
| protected IllegalArgumentException exception(String vAppName, String reason) { |
| return new IllegalArgumentException(String.format( |
| "Object '%s' doesn't match dns naming constraints. " + "Reason: %s.", vAppName, |
| reason)); |
| } |
| |
| } |