de.perdian.commons.lang.conversion.impl.converters.StringToNumberConverter.java Source code

Introduction

Here is the source code for de.perdian.commons.lang.conversion.impl.converters.StringToNumberConverter.java

Source

/*
 * Copyright 2013 Christian Robert
 *
 * Licensed 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 de.perdian.commons.lang.conversion.impl.converters;

import java.text.NumberFormat;
import java.text.ParseException;

import org.springframework.context.i18n.LocaleContext;

import de.perdian.commons.lang.conversion.ConverterException;

public class StringToNumberConverter extends AbstractNumberFormatConverter<String, Number> {

    public StringToNumberConverter() {
    }

    public StringToNumberConverter(String pattern) {
        super(pattern);
    }

    public StringToNumberConverter(String pattern, LocaleContext context) {
        super(pattern, context);
    }

    public StringToNumberConverter(NumberFormat format) {
        this.setFormat(format);
    }

    @Override
    protected Number convertUsingFormat(NumberFormat format, String source) {
        try {
            return source == null ? null : format.parse(source);
        } catch (ParseException e) {
            StringBuilder errorMessage = new StringBuilder();
            errorMessage.append("Cannot parse value '").append(source).append("' into ");
            errorMessage.append(" valid Number using format '").append(format);
            errorMessage.append("'");
            throw new ConverterException(source, errorMessage.toString());
        }
    }

}