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.wicket.util.parse.metapattern; 018 019import java.util.regex.Matcher; 020 021/** 022 * A Group that captures floating point values (doubles and floats). 023 * 024 * @author Jonathan Locke 025 */ 026public final class FloatingPointGroup extends Group 027{ 028 private static final long serialVersionUID = 1L; 029 030 /** 031 * Constructs an FloatingPointGroup that parses Strings that match the FLOATING_POINT_NUMBER 032 * pattern. 033 * 034 * @see MetaPattern#FLOATING_POINT_NUMBER 035 */ 036 public FloatingPointGroup() 037 { 038 super(FLOATING_POINT_NUMBER); 039 } 040 041 /** 042 * @param matcher 043 * The matcher 044 * @return The value 045 */ 046 public float getFloat(final Matcher matcher) 047 { 048 return getFloat(matcher, -1); 049 } 050 051 /** 052 * Gets float by parsing the String matched by this capturing group. 053 * 054 * @param matcher 055 * The matcher 056 * @param defaultValue 057 * The default value to use if this group is omitted because it is optional 058 * @return The parsed value 059 */ 060 public float getFloat(final Matcher matcher, final float defaultValue) 061 { 062 final String value = get(matcher); 063 return value == null ? defaultValue : Float.parseFloat(value); 064 } 065 066 /** 067 * @param matcher 068 * The matcher 069 * @return The value 070 */ 071 public double getDouble(final Matcher matcher) 072 { 073 return getDouble(matcher, -1); 074 } 075 076 /** 077 * Gets double by parsing the String matched by this capturing group. 078 * 079 * @param matcher 080 * The matcher 081 * @param defaultValue 082 * The default value to use if this group is omitted because it is optional 083 * @return The parsed value 084 */ 085 public double getDouble(final Matcher matcher, final double defaultValue) 086 { 087 final String value = get(matcher); 088 return value == null ? defaultValue : Double.parseDouble(value); 089 } 090}