org.apache.juneau.rest.vars.SerializedRequestAttrVar Maven / Gradle / Ivy
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package org.apache.juneau.rest.vars;
import static org.apache.juneau.internal.StringUtils.*;
import java.io.*;
import org.apache.juneau.rest.*;
import org.apache.juneau.serializer.*;
import org.apache.juneau.svl.*;
/**
* Serialized request attribute variable resolver.
*
*
* The format for this var is "$SA{contentType,key[,defaultValue]}" .
*
*
* This variable resolver requires that a {@link RestRequest} object be set as a context object on the resolver or a
* session object on the resolver session.
*
*
* Since this is a {@link SimpleVar}, any variables contained in the result will be recursively resolved.
* Likewise, if the arguments contain any variables, those will be resolved before they are passed to this var.
*
*
See Also:
*
* - {@doc juneau-rest-server.SvlVariables}
*
*/
public class SerializedRequestAttrVar extends StreamedVar {
/** The name of this variable. */
public static final String NAME = "SA";
/**
* Constructor.
*/
public SerializedRequestAttrVar() {
super(NAME);
}
@Override /* Parameter */
public void resolveTo(VarResolverSession session, Writer w, String key) throws Exception {
int i = key.indexOf(',');
if (i == -1)
throw new RuntimeException("Invalid format for $SA var. Must be of the format $SA{contentType,key[,defaultValue]}");
String[] s2 = split(key);
RestRequest req = session.getSessionObject(RestRequest.class, RequestVar.SESSION_req, true);
if (req != null) {
Object o = req.getAttribute(key);
if (o == null)
o = key;
Serializer s = req.getSerializers().getSerializer(s2[0]);
if (s != null)
s.serialize(w, o);
}
}
@Override /* Var */
protected boolean allowNested() {
return false;
}
@Override /* Var */
protected boolean allowRecurse() {
return false;
}
}