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/*
* 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.ui.renderers;
import java.text.NumberFormat;
import java.util.Locale;
import com.vaadin.ui.Grid.AbstractRenderer;
import elemental.json.JsonValue;
/**
* A renderer for presenting number values.
*
* @since 7.4
* @author Vaadin Ltd
*/
public class NumberRenderer extends AbstractRenderer<Number> {
private final Locale locale;
private final NumberFormat numberFormat;
private final String formatString;
/**
* Creates a new number renderer.
* <p/>
* The renderer is configured to render with the number's natural string
* representation in the default locale.
*/
public NumberRenderer() {
this(Locale.getDefault());
}
/**
* Creates a new number renderer.
* <p/>
* The renderer is configured to render the number as defined with the given
* number format.
*
* @param numberFormat
* the number format with which to display numbers
* @throws IllegalArgumentException
* if {@code numberFormat} is {@code null}
*/
public NumberRenderer(NumberFormat numberFormat) {
this(numberFormat, "");
}
/**
* Creates a new number renderer.
* <p/>
* The renderer is configured to render the number as defined with the given
* number format.
*
* @param numberFormat
* the number format with which to display numbers
* @param nullRepresentation
* the textual representation of {@code null} value
* @throws IllegalArgumentException
* if {@code numberFormat} is {@code null}
*/
public NumberRenderer(NumberFormat numberFormat, String nullRepresentation)
throws IllegalArgumentException {
super(Number.class, nullRepresentation);
if (numberFormat == null) {
throw new IllegalArgumentException("Number format may not be null");
}
locale = null;
this.numberFormat = numberFormat;
formatString = null;
}
/**
* Creates a new number renderer.
* <p/>
* The renderer is configured to render with the number's natural string
* representation in the given locale.
*
* @param locale
* the locale in which to display numbers
* @throws IllegalArgumentException
* if {@code locale} is {@code null}
*/
public NumberRenderer(Locale locale) throws IllegalArgumentException {
this("%s", locale);
}
/**
* Creates a new number renderer.
* <p/>
* The renderer is configured to render with the number's natural string
* representation in the given locale.
*
* @param formatString
* the format string with which to format the number
* @param locale
* the locale in which to display numbers
* @throws IllegalArgumentException
* if {@code locale} is {@code null}
*/
public NumberRenderer(String formatString, Locale locale) throws IllegalArgumentException {
this(formatString, locale, ""); //This will call #toString() during formatting
}
/**
* Creates a new number renderer.
* <p/>
* The renderer is configured to render with the given format string in the
* default locale.
*
* @param
* formatString the format string with which to format the number
* @throws IllegalArgumentException
* if {@code formatString} is {@code null}
* @see <a
* href="http://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#syntax">Format
* String Syntax</a>
*/
public NumberRenderer(String formatString) throws IllegalArgumentException {
this(formatString, Locale.getDefault(), "");
}
/**
* Creates a new number renderer.
* <p/>
* The renderer is configured to render with the given format string in the
* given locale.
*
* @param formatString
* the format string with which to format the number
* @param locale
* the locale in which to present numbers
* @throws IllegalArgumentException
* if either argument is {@code null}
* @see <a
* href="http://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#syntax">Format
* String Syntax</a>
*/
public NumberRenderer(String formatString, Locale locale, String nullRepresentation) {
super(Number.class, nullRepresentation);
if (formatString == null) {
throw new IllegalArgumentException("Format string may not be null");
}
if (locale == null) {
throw new IllegalArgumentException("Locale may not be null");
}
this.locale = locale;
numberFormat = null;
this.formatString = formatString;
}
@Override
public JsonValue encode(Number value) {
String stringValue;
if (value == null) {
stringValue = getNullRepresentation();
} else if (formatString != null && locale != null) {
stringValue = String.format(locale, formatString, value);
} else if (numberFormat != null) {
stringValue = numberFormat.format(value);
} else {
throw new IllegalStateException(String.format("Internal bug: "
+ "%s is in an illegal state: "
+ "[locale: %s, numberFormat: %s, formatString: %s]",
getClass().getSimpleName(), locale, numberFormat,
formatString));
}
return encode(stringValue, String.class);
}
@Override
public String toString() {
final String fieldInfo;
if (numberFormat != null) {
fieldInfo = "numberFormat: " + numberFormat.toString();
} else {
fieldInfo = "locale: " + locale + ", formatString: " + formatString;
}
return String.format("%s [%s]", getClass().getSimpleName(), fieldInfo);
}
@Override
public String getNullRepresentation() {
return super.getNullRepresentation();
}
}
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