Hi,
I'm want to know whether the lack of support for query parameters is still
valid and how to address the issue otherwise.
Background:
I've inherited a project which uses Tapestry 5.1.0.5. The previous
developers have implemented a URLRewriterRule similar to the examples in the
guide. On inbound requests particular parameters are being picked up and on
outbound requests some queryString is added to the path of a
SimpleRequestWrapper like
return new SimpleRequestWrapper(request,
request.getPath()+"?someparameter=somevalue");
It works, which I find strange given that the Javadoc of Request.getPath()
indicates that it shouldn't contain the query parameters. For a change in
application I want to chain a couple of rules and make a clean
implementation so I made the class ParametersDelegatingRequest which allows
for adding parameters(see below).
Conceptionally nice, but it doesn't work :( Any pointers on where I'm going
wrong?
Regards,
Erwin
public class ParametersDelegatingRequest extends DelegatingRequest {
private Map<String, String[]> additionalParameters;
/**
* Constructs a DelegatingRequest in which parameters are added
*
* @param request
* @param additionalParameters
* Map with added parameters (Key= parameter name,
value=parameter value (String[])
*/
public ParametersDelegatingRequest(Request request, Map<String,
String[]> additionalParameters) {
super(request);
if (additionalParameters == null) {
throw new IllegalArgumentException("argument additionalParameters may
not be null");
}
this.additionalParameters = additionalParameters;
}
/*
* (non-Javadoc)
*
* @see
org.apache.tapestry5.services.DelegatingRequest#getParameter(java.lang.String)
*/
@Override
public String getParameter(String name) {
String[] value = additionalParameters.get(name);
if (value != null && value.length > 0) {
// array of Strings -> return the first value
return value[0];
} else {
// null -> just let the original request provide the value
return super.getParameter(name);
}
}
/*
* (non-Javadoc)
*
* @see
org.apache.tapestry5.services.DelegatingRequest#getParameterNames()
*/
@Override
public List<String> getParameterNames() {
// we don't want double names, so merge the sets first before returning
it as a list
Set<String> parameterNames = new TreeSet<String>();
parameterNames.addAll(additionalParameters.keySet());
parameterNames.addAll(super.getParameterNames());
return parameterNames.isEmpty()?null:new
ArrayList<String>(parameterNames);
}
/*
* (non-Javadoc)
*
* @see
org.apache.tapestry5.services.DelegatingRequest#getParameters(java.lang.String)
*/
@Override
public String[] getParameters(String name) {
List<String> result = new ArrayList<String>();
// this parameters
String[] values = additionalParameters.get(name);
if (values != null) {
result.addAll(Arrays.asList(values));
}
// the delegated parameters
values = super.getParameters(name);
if (values != null) {
result.addAll(Arrays.asList(values));
}
return result.isEmpty()?null:result.toArray(new String[0]);
}
}
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