| /* |
| * 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.guacamole.form; |
| |
| /** |
| * Represents a field which may contain only integer values. |
| */ |
| public class NumericField extends Field { |
| |
| /** |
| * Creates a new NumericField with the given name. |
| * |
| * @param name |
| * The unique name to associate with this field. |
| */ |
| public NumericField(String name) { |
| super(name, Field.Type.NUMERIC); |
| } |
| |
| /** |
| * Formats the given integer in the format required by a numeric field. |
| * |
| * @param i |
| * The integer to format, which may be null. |
| * |
| * @return |
| * A string representation of the given integer, or null if the given |
| * integer was null. |
| */ |
| public static String format(Integer i) { |
| |
| // Return null if no value provided |
| if (i == null) |
| return null; |
| |
| // Convert to string |
| return i.toString(); |
| |
| } |
| |
| /** |
| * Parses the given string as an integer, where the given string is in the |
| * format required by a numeric field. |
| * |
| * @param str |
| * The string to parse as an integer, which may be null. |
| * |
| * @return |
| * The integer representation of the given string, or null if the given |
| * string was null. |
| * |
| * @throws NumberFormatException |
| * If the given string is not in a parseable format. |
| */ |
| public static Integer parse(String str) throws NumberFormatException { |
| |
| // Return null if no value provided |
| if (str == null || str.isEmpty()) |
| return null; |
| |
| // Parse as integer |
| return Integer.valueOf(str); |
| |
| } |
| |
| } |