// Copyright 2005 The Apache Software Foundation
//
// 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 org.apache.tapestry.form.validator;
import org.apache.tapestry.IMarkupWriter;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.form.FormComponentContributorContext;
import org.apache.tapestry.form.IFormComponent;
import org.apache.tapestry.form.ValidationMessages;
import org.apache.tapestry.form.translator.NumberTranslator;
import org.apache.tapestry.json.JSONLiteral;
import org.apache.tapestry.json.JSONObject;
import org.apache.tapestry.valid.ValidationConstants;
import org.apache.tapestry.valid.ValidationConstraint;
import org.apache.tapestry.valid.ValidationStrings;
import org.apache.tapestry.valid.ValidatorException;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.Locale;
/**
* Validates that the input value is not larger than a particular maximum value.
*
* @author Howard Lewis Ship
* @since 4.0
*/
public class Max extends BaseValidator
{
private double _max;
public Max()
{
}
public Max(String initializer)
{
super(initializer);
}
/**
* Does comparison based on the {@link Number#doubleValue()}.
*/
public void validate(IFormComponent field, ValidationMessages messages, Object object)
throws ValidatorException
{
Number value = (Number) object;
if (value.doubleValue() > _max)
throw new ValidatorException(buildMessage(messages, field),
ValidationConstraint.TOO_LARGE);
}
private String getStringValue(Locale locale, IFormComponent field)
{
String ret = null;
NumberTranslator translator = (NumberTranslator)super.getFieldTranslator(field, NumberTranslator.class);
if (translator != null)
ret = translator.format(field, locale, new Double(_max));
else
ret = String.valueOf(_max);
return ret;
}
private String buildMessage(ValidationMessages messages, IFormComponent field)
{
return messages.formatValidationMessage(
getMessage(),
ValidationStrings.VALUE_TOO_LARGE,
new Object[]
{ field.getDisplayName(), getStringValue(messages.getLocale(), field) });
}
public void renderContribution(IMarkupWriter writer, IRequestCycle cycle,
FormComponentContributorContext context, IFormComponent field)
{
JSONObject profile = context.getProfile();
if (!profile.has(ValidationConstants.CONSTRAINTS)) {
profile.put(ValidationConstants.CONSTRAINTS, new JSONObject());
}
JSONObject cons = profile.getJSONObject(ValidationConstants.CONSTRAINTS);
context.addInitializationScript(field, "dojo.require(\"dojo.i18n.number\");");
String maxString = getStringValue(context.getLocale(), field);
String grouping = "";
DecimalFormatSymbols symbols = null;
NumberTranslator translator = (NumberTranslator)super.getFieldTranslator(field, NumberTranslator.class);
if (translator != null) {
DecimalFormat format = translator.getDecimalFormat(context.getLocale());
if (format.isGroupingUsed()) {
grouping += ",separator:" + JSONObject.quote(format.getDecimalFormatSymbols().getGroupingSeparator());
grouping += ",groupSize:" + format.getGroupingSize();
} else {
grouping += ",separator:\"\"";
}
symbols = format.getDecimalFormatSymbols();
} else {
symbols = new DecimalFormatSymbols(context.getLocale());
}
accumulateProperty(cons, field.getClientId(),
new JSONLiteral("[tapestry.form.validation.lessThanOrEqual,"
+ JSONObject.quote(maxString)
+ ",{"
+ "decimal:" + JSONObject.quote(symbols.getDecimalSeparator())
+ grouping
+ "}]"));
accumulateProfileProperty(field, profile, ValidationConstants.CONSTRAINTS, buildMessage(context, field));
}
public void setMax(double max)
{
_max = max;
}
public double getMax()
{
return _max;
}
}