| /** |
| * 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.hadoop.hdfs.web.resources; |
| |
| /** Integer parameter. */ |
| abstract class IntegerParam extends Param<Integer, IntegerParam.Domain> { |
| IntegerParam(final Domain domain, final Integer value, |
| final Integer min, final Integer max) { |
| super(domain, value); |
| checkRange(min, max); |
| } |
| |
| private void checkRange(final Integer min, final Integer max) { |
| if (value == null) { |
| return; |
| } |
| if (min != null && value < min) { |
| throw new IllegalArgumentException("Invalid parameter range: " + getName() |
| + " = " + domain.toString(value) + " < " + domain.toString(min)); |
| } |
| if (max != null && value > max) { |
| throw new IllegalArgumentException("Invalid parameter range: " + getName() |
| + " = " + domain.toString(value) + " > " + domain.toString(max)); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return getName() + "=" + domain.toString(getValue()); |
| } |
| |
| /** The domain of the parameter. */ |
| static final class Domain extends Param.Domain<Integer> { |
| /** The radix of the number. */ |
| final int radix; |
| |
| Domain(final String paramName) { |
| this(paramName, 10); |
| } |
| |
| Domain(final String paramName, final int radix) { |
| super(paramName); |
| this.radix = radix; |
| } |
| |
| @Override |
| public String getDomain() { |
| return "<" + NULL + " | int in radix " + radix + ">"; |
| } |
| |
| @Override |
| Integer parse(final String str) { |
| try{ |
| return NULL.equals(str)? null: Integer.parseInt(str, radix); |
| } catch(NumberFormatException e) { |
| throw new IllegalArgumentException("Failed to parse \"" + str |
| + "\" as a radix-" + radix + " integer.", e); |
| } |
| } |
| |
| /** Convert an Integer to a String. */ |
| String toString(final Integer n) { |
| return n == null? NULL: Integer.toString(n, radix); |
| } |
| } |
| } |