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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.declarative.converters;
import java.util.Locale;
import com.vaadin.data.util.converter.Converter;
import com.vaadin.ui.declarative.DesignAttributeHandler;
/**
* An converter for Enum to/from String for {@link DesignAttributeHandler} to
* use internally.
*
* @since 7.4
* @author Vaadin Ltd
*/
public class DesignEnumConverter implements Converter<String, Enum> {
@Override
public Enum convertToModel(String value, Class<? extends Enum> targetType,
Locale locale)
throws com.vaadin.data.util.converter.Converter.ConversionException {
if (value == null || value.trim().equals("")) {
return null;
}
return Enum.valueOf(targetType, value.toUpperCase(Locale.ENGLISH));
}
@Override
public String convertToPresentation(Enum value,
Class<? extends String> targetType, Locale locale)
throws com.vaadin.data.util.converter.Converter.ConversionException {
if (value == null) {
return null;
}
return value.name().toLowerCase(Locale.ENGLISH);
}
@Override
public Class<Enum> getModelType() {
return Enum.class;
}
@Override
public Class<String> getPresentationType() {
return String.class;
}
}
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