001/*
002 * Copyright 2002-2015 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.format.number.money;
018
019import java.text.ParseException;
020import java.util.Collections;
021import java.util.Currency;
022import java.util.Locale;
023import java.util.Set;
024import javax.money.CurrencyUnit;
025import javax.money.Monetary;
026import javax.money.MonetaryAmount;
027
028import org.springframework.context.support.EmbeddedValueResolutionSupport;
029import org.springframework.format.AnnotationFormatterFactory;
030import org.springframework.format.Formatter;
031import org.springframework.format.Parser;
032import org.springframework.format.Printer;
033import org.springframework.format.annotation.NumberFormat;
034import org.springframework.format.annotation.NumberFormat.Style;
035import org.springframework.format.number.CurrencyStyleFormatter;
036import org.springframework.format.number.NumberStyleFormatter;
037import org.springframework.format.number.PercentStyleFormatter;
038import org.springframework.util.StringUtils;
039
040/**
041 * Formats {@link javax.money.MonetaryAmount} fields annotated
042 * with Spring's common {@link NumberFormat} annotation.
043 *
044 * @author Juergen Hoeller
045 * @since 4.2
046 * @see NumberFormat
047 */
048public class Jsr354NumberFormatAnnotationFormatterFactory extends EmbeddedValueResolutionSupport
049                implements AnnotationFormatterFactory<NumberFormat> {
050
051        private static final String CURRENCY_CODE_PATTERN = "\u00A4\u00A4";
052
053
054        @Override
055        @SuppressWarnings("unchecked")
056        public Set<Class<?>> getFieldTypes() {
057                return (Set) Collections.singleton(MonetaryAmount.class);
058        }
059
060        @Override
061        public Printer<MonetaryAmount> getPrinter(NumberFormat annotation, Class<?> fieldType) {
062                return configureFormatterFrom(annotation);
063        }
064
065        @Override
066        public Parser<MonetaryAmount> getParser(NumberFormat annotation, Class<?> fieldType) {
067                return configureFormatterFrom(annotation);
068        }
069
070
071        private Formatter<MonetaryAmount> configureFormatterFrom(NumberFormat annotation) {
072                if (StringUtils.hasLength(annotation.pattern())) {
073                        return new PatternDecoratingFormatter(resolveEmbeddedValue(annotation.pattern()));
074                }
075                else {
076                        Style style = annotation.style();
077                        if (style == Style.NUMBER) {
078                                return new NumberDecoratingFormatter(new NumberStyleFormatter());
079                        }
080                        else if (style == Style.PERCENT) {
081                                return new NumberDecoratingFormatter(new PercentStyleFormatter());
082                        }
083                        else {
084                                return new NumberDecoratingFormatter(new CurrencyStyleFormatter());
085                        }
086                }
087        }
088
089
090        private static class NumberDecoratingFormatter implements Formatter<MonetaryAmount> {
091
092                private final Formatter<Number> numberFormatter;
093
094                public NumberDecoratingFormatter(Formatter<Number> numberFormatter) {
095                        this.numberFormatter = numberFormatter;
096                }
097
098                @Override
099                public String print(MonetaryAmount object, Locale locale) {
100                        return this.numberFormatter.print(object.getNumber(), locale);
101                }
102
103                @Override
104                public MonetaryAmount parse(String text, Locale locale) throws ParseException {
105                        CurrencyUnit currencyUnit = Monetary.getCurrency(locale);
106                        Number numberValue = this.numberFormatter.parse(text, locale);
107                        return Monetary.getDefaultAmountFactory().setNumber(numberValue).setCurrency(currencyUnit).create();
108                }
109        }
110
111
112        private static class PatternDecoratingFormatter implements Formatter<MonetaryAmount> {
113
114                private final String pattern;
115
116                public PatternDecoratingFormatter(String pattern) {
117                        this.pattern = pattern;
118                }
119
120                @Override
121                public String print(MonetaryAmount object, Locale locale) {
122                        CurrencyStyleFormatter formatter = new CurrencyStyleFormatter();
123                        formatter.setCurrency(Currency.getInstance(object.getCurrency().getCurrencyCode()));
124                        formatter.setPattern(this.pattern);
125                        return formatter.print(object.getNumber(), locale);
126                }
127
128                @Override
129                public MonetaryAmount parse(String text, Locale locale) throws ParseException {
130                        CurrencyStyleFormatter formatter = new CurrencyStyleFormatter();
131                        Currency currency = determineCurrency(text, locale);
132                        CurrencyUnit currencyUnit = Monetary.getCurrency(currency.getCurrencyCode());
133                        formatter.setCurrency(currency);
134                        formatter.setPattern(this.pattern);
135                        Number numberValue = formatter.parse(text, locale);
136                        return Monetary.getDefaultAmountFactory().setNumber(numberValue).setCurrency(currencyUnit).create();
137                }
138
139                private Currency determineCurrency(String text, Locale locale) {
140                        try {
141                                if (text.length() < 3) {
142                                        // Could not possibly contain a currency code ->
143                                        // try with locale and likely let it fail on parse.
144                                        return Currency.getInstance(locale);
145                                }
146                                else if (this.pattern.startsWith(CURRENCY_CODE_PATTERN)) {
147                                        return Currency.getInstance(text.substring(0, 3));
148                                }
149                                else if (this.pattern.endsWith(CURRENCY_CODE_PATTERN)) {
150                                        return Currency.getInstance(text.substring(text.length() - 3));
151                                }
152                                else {
153                                        // A pattern without a currency code...
154                                        return Currency.getInstance(locale);
155                                }
156                        }
157                        catch (IllegalArgumentException ex) {
158                                throw new IllegalArgumentException("Cannot determine currency for number value [" + text + "]", ex);
159                        }
160                }
161        }
162
163}