com.vaadin.data.util.converter.StringToIntegerConverter Maven / Gradle / Ivy
/*
* Copyright 2000-2014 Vaadin Ltd.
*
* 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 com.vaadin.data.util.converter;
import java.text.NumberFormat;
import java.util.Locale;
/**
* A converter that converts from {@link String} to {@link Integer} and back.
* Uses the given locale and a {@link NumberFormat} instance for formatting and
* parsing.
*
* Override and overwrite {@link #getFormat(Locale)} to use a different format.
*
*
* @author Vaadin Ltd
* @since 7.0
*/
public class StringToIntegerConverter extends
AbstractStringToNumberConverter {
/**
* Returns the format used by
* {@link #convertToPresentation(Integer, Class, Locale)} and
* {@link #convertToModel(String, Class, Locale)}
*
* @param locale
* The locale to use
* @return A NumberFormat instance
*/
@Override
protected NumberFormat getFormat(Locale locale) {
if (locale == null) {
locale = Locale.getDefault();
}
return NumberFormat.getIntegerInstance(locale);
}
/*
* (non-Javadoc)
*
* @see
* com.vaadin.data.util.converter.Converter#convertToModel(java.lang.Object,
* java.lang.Class, java.util.Locale)
*/
@Override
public Integer convertToModel(String value,
Class targetType, Locale locale)
throws ConversionException {
Number n = convertToNumber(value, targetType, locale);
if (n == null) {
return null;
}
int intValue = n.intValue();
if (intValue == n.longValue()) {
// If the value of n is outside the range of long, the return value
// of longValue() is either Long.MIN_VALUE or Long.MAX_VALUE. The
// above comparison promotes int to long and thus does not need to
// consider wrap-around.
return intValue;
}
throw new ConversionException("Could not convert '" + value + "' to "
+ Integer.class.getName() + ": value out of range");
}
/*
* (non-Javadoc)
*
* @see com.vaadin.data.util.converter.Converter#getModelType()
*/
@Override
public Class getModelType() {
return Integer.class;
}
}