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/*
* Copyright 2000-2022 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.v7.data.util.converter;
import java.util.Locale;
/**
* A converter that converts from {@link String} to {@link Boolean} and back.
* The String representation is given by {@link Boolean#toString()} or provided
* in constructor {@link #StringToBooleanConverter(String, String)}.
* <p>
* Leading and trailing white spaces are ignored when converting from a String.
* </p>
* <p>
* For language-dependent representation, subclasses should overwrite
* {@link #getFalseString(Locale)} and {@link #getTrueString(Locale)}
* </p>
*
* @author Vaadin Ltd
* @since 7.0
*/
@Deprecated
public class StringToBooleanConverter implements Converter<String, Boolean> {
private final String trueString;
private final String falseString;
/**
* Creates converter with default string representations - "true" and
* "false".
*
*/
public StringToBooleanConverter() {
this(Boolean.TRUE.toString(), Boolean.FALSE.toString());
}
/**
* Creates converter with custom string representation.
*
* @since 7.5.4
* @param falseString
* string representation for <code>false</code>
* @param trueString
* string representation for <code>true</code>
*/
public StringToBooleanConverter(String trueString, String falseString) {
this.trueString = trueString;
this.falseString = falseString;
}
/*
* (non-Javadoc)
*
* @see
* com.vaadin.data.util.converter.Converter#convertToModel(java.lang.Object,
* java.lang.Class, java.util.Locale)
*/
@Override
public Boolean convertToModel(String value,
Class<? extends Boolean> targetType, Locale locale)
throws ConversionException {
if (value == null || value.isEmpty()) {
return null;
}
// Remove leading and trailing white space
value = value.trim();
if (getTrueString().equals(value)) {
return true;
} else if (getFalseString().equals(value)) {
return false;
} else {
throw new ConversionException("Cannot convert " + value + " to "
+ getModelType().getName());
}
}
/**
* Gets the string representation for true. Default is "true", if not set in
* constructor.
*
* @return the string representation for true
*/
protected String getTrueString() {
return trueString;
}
/**
* Gets the string representation for false. Default is "false", if not set
* in constructor.
*
* @return the string representation for false
*/
protected String getFalseString() {
return falseString;
}
/*
* (non-Javadoc)
*
* @see
* com.vaadin.data.util.converter.Converter#convertToPresentation(java.lang
* .Object, java.lang.Class, java.util.Locale)
*/
@Override
public String convertToPresentation(Boolean value,
Class<? extends String> targetType, Locale locale)
throws ConversionException {
if (value == null) {
return null;
}
if (value) {
return getTrueString(locale);
} else {
return getFalseString(locale);
}
}
/**
* Gets the locale-depended string representation for false. Default is
* locale-independent value provided by {@link #getFalseString()}
*
* @since 7.5.4
* @param locale
* to be used
* @return the string representation for false
*/
protected String getFalseString(Locale locale) {
return getFalseString();
}
/**
* Gets the locale-depended string representation for true. Default is
* locale-independent value provided by {@link #getTrueString()}
*
* @since 7.5.4
* @param locale
* to be used
* @return the string representation for true
*/
protected String getTrueString(Locale locale) {
return getTrueString();
}
/*
* (non-Javadoc)
*
* @see com.vaadin.data.util.converter.Converter#getModelType()
*/
@Override
public Class<Boolean> getModelType() {
return Boolean.class;
}
/*
* (non-Javadoc)
*
* @see com.vaadin.data.util.converter.Converter#getPresentationType()
*/
@Override
public Class<String> getPresentationType() {
return String.class;
}
}
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