/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.wicket.markup.html.form;
import java.util.Locale;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.model.IModel;
import org.apache.wicket.util.convert.ConversionException;
import org.apache.wicket.util.convert.IConverter;
import org.apache.wicket.util.lang.Objects;
import org.apache.wicket.util.value.IValueMap;
import org.apache.wicket.validation.validator.RangeValidator;
/**
* A {@link TextField} for HTML5 <input> with type <em>number</em>.
*
* <p>
* Automatically validates the input against the configured {@link #setMinimum(N) min} and
* {@link #setMaximum(N) max} attributes. If any of them is <code>null</code> then respective
* MIN_VALUE or MAX_VALUE for the number type is used. If the number type has no minimum and/or
* maximum value then {@link Double#MIN_VALUE} and {@link Double#MAX_VALUE} are used respectfully.
*
* @param <N>
* the type of the number
*/
public class NumberTextField<N extends Number & Comparable<N>> extends TextField<N>
{
private static final long serialVersionUID = 1L;
/**
* Use this as a marker of step attribute value "any"
* Because the w3c spec requires step to be a non-negative digit
* greater than zero we use zero as delegate for "any" keyword.
*/
public static final Double ANY = Double.valueOf(0d);
private RangeValidator<N> validator;
private N minimum;
private N maximum;
private N step;
/**
* Construct.
*
* @param id
* component id
*/
public NumberTextField(String id)
{
this(id, null);
}
/**
* Construct.
*
* @param id
* component id
* @param model
* the input value
*/
public NumberTextField(String id, IModel<N> model)
{
this(id, model, null);
}
/**
* Construct.
*
* @param id
* component id
* @param model
* the input value
* @param type
* The type to use when updating the model for this text field
*/
public NumberTextField(String id, IModel<N> model, Class<N> type)
{
super(id, model, type);
validator = null;
minimum = null;
maximum = null;
}
/**
* Sets the minimum allowed value
*
* @param minimum
* the minimum allowed value
* @return this instance
*/
public NumberTextField<N> setMinimum(final N minimum)
{
this.minimum = minimum;
return this;
}
/**
* Sets the maximum allowed value
*
* @param maximum
* the maximum allowed value
* @return this instance
*/
public NumberTextField<N> setMaximum(final N maximum)
{
this.maximum = maximum;
return this;
}
/**
* Sets the step attribute
*
* @param step
* the step attribute
* @return this instance
*/
public NumberTextField<N> setStep(final N step)
{
this.step = step;
return this;
}
@Override
public void onConfigure()
{
super.onConfigure();
if (validator != null)
{
remove(validator);
validator = null;
}
if (minimum != null || maximum != null)
{
validator = RangeValidator.range(minimum, maximum);
add(validator);
}
}
private Class<N> getNumberType()
{
Class<N> numberType = getType();
if (numberType == null && getModelObject() != null)
{
numberType = (Class<N>)getModelObject().getClass();
}
return numberType;
}
@Override
protected void onComponentTag(final ComponentTag tag)
{
super.onComponentTag(tag);
IValueMap attributes = tag.getAttributes();
if (minimum != null)
{
attributes.put("min", Objects.stringValue(minimum));
}
else
{
attributes.remove("min");
}
if (maximum != null)
{
attributes.put("max", Objects.stringValue(maximum));
}
else
{
attributes.remove("max");
}
if (step != null)
{
if (step.doubleValue() == ANY)
{
attributes.put("step", "any");
}
else
{
attributes.put("step", Objects.stringValue(step));
}
}
else
{
attributes.remove("step");
}
}
@Override
protected String[] getInputTypes()
{
return new String[] {"number"};
}
/**
* The formatting for {@link Locale#ENGLISH} might not be compatible with HTML (e.g. group
* digits), thus use {@link Objects#stringValue(Object)} instead.
*
* @return value
*/
@Override
protected String getModelValue()
{
N value = getModelObject();
if (value == null)
{
return "";
}
else
{
return Objects.stringValue(value);
}
}
/**
* Always use {@link Locale#ENGLISH} to parse the input.
*/
@Override
protected void convertInput()
{
IConverter<N> converter = getConverter(getNumberType());
try
{
setConvertedInput(converter.convertToObject(getInput(), Locale.ENGLISH));
}
catch (ConversionException e)
{
error(newValidationError(e));
}
}
}