/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 io.undertow.attribute;
import java.util.
ArrayDeque;
import java.util.
Deque;
import io.undertow.server.
HttpServerExchange;
/**
* Path parameter
*
* @author Stuart Douglas
*/
public class
PathParameterAttribute implements
ExchangeAttribute {
private final
String parameter;
public
PathParameterAttribute(
String parameter) {
this.
parameter =
parameter;
}
@
Override
public
String readAttribute(final
HttpServerExchange exchange) {
Deque<
String>
res =
exchange.
getPathParameters().
get(
parameter);
if(
res == null) {
return null;
}else if(
res.
isEmpty()) {
return "";
} else if(
res.
size() ==1) {
return
res.
getFirst();
} else {
StringBuilder sb = new
StringBuilder("[");
int
i = 0;
for(
String s :
res) {
sb.
append(
s);
if(++
i !=
res.
size()) {
sb.
append(", ");
}
}
sb.
append("]");
return
sb.
toString();
}
}
@
Override
public void
writeAttribute(final
HttpServerExchange exchange, final
String newValue) throws
ReadOnlyAttributeException {
final
ArrayDeque<
String>
value = new
ArrayDeque<>();
value.
add(
newValue);
exchange.
getPathParameters().
put(
parameter,
value);
}
public static final class
Builder implements
ExchangeAttributeBuilder {
@
Override
public
String name() {
return "Path Parameter";
}
@
Override
public
ExchangeAttribute build(final
String token) {
if (
token.
startsWith("%{p,") &&
token.
endsWith("}")) {
final
String qp =
token.
substring(4,
token.
length() - 1);
return new
PathParameterAttribute(
qp);
}
return null;
}
@
Override
public int
priority() {
return 0;
}
}
}