com.vaadin.ui.declarative.converters.DesignEnumConverter Maven / Gradle / Ivy
/*
* Copyright (C) 2000-2024 Vaadin Ltd
*
* This program is available under Vaadin Commercial License and Service Terms.
*
* See for the full
* license.
*/
package com.vaadin.ui.declarative.converters;
import java.util.Locale;
import com.vaadin.data.Converter;
import com.vaadin.data.Result;
import com.vaadin.data.ValueContext;
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
*/
@SuppressWarnings("rawtypes")
public class DesignEnumConverter
implements Converter {
private final Class type;
/**
* Creates a converter for the given enum type.
*
* @param type
* the enum type to convert to/from
*/
public DesignEnumConverter(Class type) {
this.type = type;
}
@SuppressWarnings("unchecked")
@Override
public Result convertToModel(String value, ValueContext context) {
if (value == null || value.trim().isEmpty()) {
return Result.ok(null);
}
try {
T result = (T) Enum.valueOf(type, value.toUpperCase(Locale.ROOT));
return Result.ok(result);
} catch (Exception e) {
return Result.error(e.getMessage());
}
}
@Override
public String convertToPresentation(T value, ValueContext context) {
if (value == null) {
return null;
}
return value.name().toLowerCase(Locale.ROOT);
}
}