org.simpleframework.xml.transform.LocaleTransform Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of simple-xml Show documentation
Show all versions of simple-xml Show documentation
Simple is a high performance XML serialization and configuration framework for Java
The newest version!
/*
* LocaleTransform.java May 2007
*
* Copyright (C) 2007, Niall Gallagher
*
* 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.simpleframework.xml.transform;
import java.util.regex.Pattern;
import java.util.Locale;
/**
* The LocaleTransform
is used to transform locale
* values to and from string representations, which will be inserted
* in the generated XML document as the value place holder. The
* value must be readable and writable in the same format. Fields
* and methods annotated with the XML attribute annotation will use
* this to persist and retrieve the value to and from the XML source.
*
*
* @Attribute
* private Locale locale;
*
*
* As well as the XML attribute values using transforms, fields and
* methods annotated with the XML element annotation will use this.
* Aside from the obvious difference, the element annotation has an
* advantage over the attribute annotation in that it can maintain
* any references using the CycleStrategy
object.
*
* @author Niall Gallagher
*/
class LocaleTransform implements Transform{
/**
* This is the pattern used to split the parts of the locale.
*/
private final Pattern pattern;
/**
* Constructor for the LocaleTransform
object. This
* is used to create a transform that will convert locales to and
* from string representations. The representations use the Java
* locale representation of language, country, and varient.
*/
public LocaleTransform() {
this.pattern = Pattern.compile("_");
}
/**
* This method is used to convert the string value given to an
* appropriate representation. This is used when an object is
* being deserialized from the XML document and the value for
* the string representation is required.
*
* @param locale the string representation of the date value
*
* @return this returns an appropriate instanced to be used
*/
public Locale read(String locale) throws Exception {
String[] list = pattern.split(locale);
if(list.length < 1) {
throw new InvalidFormatException("Invalid locale %s", locale);
}
return read(list);
}
/**
* This method is used to convert the string value given to an
* appropriate representation. This is used when an object is
* being deserialized from the XML document and the value for
* the string representation is required.
*
* @param locale the string representation of the date value
*
* @return this returns an appropriate instanced to be used
*/
private Locale read(String[] locale) throws Exception {
String[] list = new String[] {"", "", ""};
for(int i = 0; i < list.length; i++) {
if(i < locale.length) {
list[i] = locale[i];
}
}
return new Locale(list[0], list[1], list[2]);
}
/**
* This method is used to convert the provided value into an XML
* usable format. This is used in the serialization process when
* there is a need to convert a field value in to a string so
* that that value can be written as a valid XML entity.
*
* @param locale this is the value to be converted to a string
*
* @return this is the string representation of the given date
*/
public String write(Locale locale) {
return locale.toString();
}
}