package com.opentravelsoft.webapp.filter;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import java.util.Locale;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* HttpRequestWrapper overriding methods getLocale(), getLocales() to include
* the user's preferred locale.
*/
public class LocaleRequestWrapper extends HttpServletRequestWrapper {
private final transient Log log = LogFactory.getLog(LocaleRequestWrapper.class);
private final Locale preferredLocale;
/**
* Sets preferred local to user's locale
* @param decorated the current decorated request
* @param userLocale the user's locale
*/
public LocaleRequestWrapper(final HttpServletRequest decorated, final Locale userLocale) {
super(decorated);
preferredLocale = userLocale;
if (null == preferredLocale) {
log.error("preferred locale = null, it is an unexpected value!");
}
}
/**
* {@inheritDoc}
*/
public Locale getLocale() {
if (null != preferredLocale) {
return preferredLocale;
} else {
return super.getLocale();
}
}
/**
* {@inheritDoc}
*/
@SuppressWarnings("unchecked")
public Enumeration<Locale> getLocales() {
if (null != preferredLocale) {
List<Locale> l = Collections.list(super.getLocales());
if (l.contains(preferredLocale)) {
l.remove(preferredLocale);
}
l.add(0, preferredLocale);
return Collections.enumeration(l);
} else {
return super.getLocales();
}
}
}