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- /*
- @VaadinApache2LicenseForJavaFiles@
- */
-
- package com.vaadin.data.util.converter;
-
- import java.text.NumberFormat;
- import java.text.ParsePosition;
- 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.
- * <p>
- * Override and overwrite {@link #getFormat(Locale)} to use a different format.
- * </p>
- *
- * @author Vaadin Ltd
- * @version
- * @VERSION@
- * @since 7.0
- */
- public class StringToIntegerConverter implements Converter<String, Integer> {
-
- /**
- * Returns the format used by
- * {@link #convertToPresentation(Integer, Locale)} and
- * {@link #convertToModel(String, Locale)}.
- *
- * @param locale
- * The locale to use
- * @return A NumberFormat instance
- */
- protected NumberFormat getFormat(Locale locale) {
- if (locale == null) {
- locale = Locale.getDefault();
- }
- return NumberFormat.getIntegerInstance(locale);
- }
-
- @Override
- public Integer convertToModel(String value, Locale locale)
- throws ConversionException {
- if (value == null) {
- return null;
- }
-
- // Remove leading and trailing white space
- value = value.trim();
-
- // Parse and detect errors. If the full string was not used, it is
- // an error.
- ParsePosition parsePosition = new ParsePosition(0);
- Number parsedValue = getFormat(locale).parse(value, parsePosition);
- if (parsePosition.getIndex() != value.length()) {
- throw new ConversionException("Could not convert '" + value
- + "' to " + getModelType().getName());
- }
-
- if (parsedValue == null) {
- // Convert "" to null
- return null;
- }
- return parsedValue.intValue();
- }
-
- @Override
- public String convertToPresentation(Integer value, Locale locale)
- throws ConversionException {
- if (value == null) {
- return null;
- }
-
- return getFormat(locale).format(value);
- }
-
- @Override
- public Class<Integer> getModelType() {
- return Integer.class;
- }
-
- @Override
- public Class<String> getPresentationType() {
- return String.class;
- }
-
- }
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