diff options
3 files changed, 166 insertions, 0 deletions
diff --git a/server/src/com/vaadin/data/util/converter/DefaultConverterFactory.java b/server/src/com/vaadin/data/util/converter/DefaultConverterFactory.java index 17b89ccb20..16bab64790 100644 --- a/server/src/com/vaadin/data/util/converter/DefaultConverterFactory.java +++ b/server/src/com/vaadin/data/util/converter/DefaultConverterFactory.java @@ -95,6 +95,8 @@ public class DefaultConverterFactory implements ConverterFactory { protected Converter<String, ?> createStringConverter(Class<?> sourceType) { if (Double.class.isAssignableFrom(sourceType)) { return new StringToDoubleConverter(); + } else if (Float.class.isAssignableFrom(sourceType)) { + return new StringToFloatConverter(); } else if (Integer.class.isAssignableFrom(sourceType)) { return new StringToIntegerConverter(); } else if (Boolean.class.isAssignableFrom(sourceType)) { diff --git a/server/src/com/vaadin/data/util/converter/StringToFloatConverter.java b/server/src/com/vaadin/data/util/converter/StringToFloatConverter.java new file mode 100644 index 0000000000..76d53a7294 --- /dev/null +++ b/server/src/com/vaadin/data/util/converter/StringToFloatConverter.java @@ -0,0 +1,122 @@ +/* + * Copyright 2011 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.text.ParsePosition; +import java.util.Locale; + +/** + * A converter that converts from {@link String} to {@link Float} and back. Uses + * the given locale and a {@link NumberFormat} instance for formatting and + * parsing. + * <p> + * Leading and trailing white spaces are ignored when converting from a String. + * </p> + * <p> + * Override and overwrite {@link #getFormat(Locale)} to use a different format. + * </p> + * + * @author Vaadin Ltd + * @since 7.0 + */ +public class StringToFloatConverter implements Converter<String, Float> { + + /** + * Returns the format used by {@link #convertToPresentation(Float, 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.getNumberInstance(locale); + } + + /* + * (non-Javadoc) + * + * @see + * com.vaadin.data.util.converter.Converter#convertToModel(java.lang.Object, + * java.util.Locale) + */ + @Override + public Float convertToModel(String value, Locale locale) + throws ConversionException { + if (value == null) { + return null; + } + + // Remove leading and trailing white space + value = value.trim(); + + 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.floatValue(); + } + + /* + * (non-Javadoc) + * + * @see + * com.vaadin.data.util.converter.Converter#convertToPresentation(java.lang + * .Object, java.util.Locale) + */ + @Override + public String convertToPresentation(Float value, Locale locale) + throws ConversionException { + if (value == null) { + return null; + } + + return getFormat(locale).format(value); + } + + /* + * (non-Javadoc) + * + * @see com.vaadin.data.util.converter.Converter#getModelType() + */ + @Override + public Class<Float> getModelType() { + return Float.class; + } + + /* + * (non-Javadoc) + * + * @see com.vaadin.data.util.converter.Converter#getPresentationType() + */ + @Override + public Class<String> getPresentationType() { + return String.class; + } +} diff --git a/server/tests/src/com/vaadin/tests/server/component/abstractfield/DefaultConverterFactory.java b/server/tests/src/com/vaadin/tests/server/component/abstractfield/DefaultConverterFactory.java index 9338d74f05..698e9bcee4 100644 --- a/server/tests/src/com/vaadin/tests/server/component/abstractfield/DefaultConverterFactory.java +++ b/server/tests/src/com/vaadin/tests/server/component/abstractfield/DefaultConverterFactory.java @@ -15,6 +15,33 @@ import com.vaadin.ui.TextField; public class DefaultConverterFactory extends TestCase { + public static class FloatBean { + float f1; + Float f2; + + public FloatBean(float f1, Float f2) { + this.f1 = f1; + this.f2 = f2; + } + + public float getF1() { + return f1; + } + + public void setF1(float f1) { + this.f1 = f1; + } + + public Float getF2() { + return f2; + } + + public void setF2(Float f2) { + this.f2 = f2; + } + + } + Person paulaBean = new Person("Paula", "Brilliant", "paula@brilliant.com", 34, Sex.FEMALE, new Address("Paula street 1", 12345, "P-town", Country.FINLAND)); @@ -25,6 +52,21 @@ public class DefaultConverterFactory extends TestCase { paulaBean.setRent(rent); } + public void testFloatConversion() { + VaadinSession sess = new VaadinSession(null); + VaadinSession.setCurrent(sess); + + TextField tf = new TextField(); + tf.setLocale(new Locale("en", "US")); + tf.setPropertyDataSource(new MethodProperty<Integer>(new FloatBean(12f, + 23f), "f2")); + assertEquals("23", tf.getValue()); + tf.setValue("24"); + assertEquals("24", tf.getValue()); + assertEquals(24f, tf.getConvertedValue()); + assertEquals(24f, tf.getPropertyDataSource().getValue()); + } + public void testDefaultNumberConversion() { VaadinSession app = new VaadinSession(null); VaadinSession.setCurrent(app); |