/*
* 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.
Map;
import io.undertow.predicate.
Predicate;
import io.undertow.server.
HttpServerExchange;
/**
* @author Stuart Douglas
*/
public class
PredicateContextAttribute implements
ExchangeAttribute {
private final
String name;
public
PredicateContextAttribute(final
String name) {
this.
name =
name;
}
@
Override
public
String readAttribute(final
HttpServerExchange exchange) {
Map<
String,
Object>
context =
exchange.
getAttachment(
Predicate.
PREDICATE_CONTEXT);
if (
context != null) {
Object object =
context.
get(
name);
return
object == null ? null :
object.
toString();
}
return null;
}
@
Override
public void
writeAttribute(final
HttpServerExchange exchange, final
String newValue) throws
ReadOnlyAttributeException {
Map<
String,
Object>
context =
exchange.
getAttachment(
Predicate.
PREDICATE_CONTEXT);
if (
context != null) {
context.
put(
name,
newValue);
}
}
public static final class
Builder implements
ExchangeAttributeBuilder {
@
Override
public
String name() {
return "Predicate context variable";
}
@
Override
public
ExchangeAttribute build(final
String token) {
if (
token.
startsWith("${") &&
token.
endsWith("}") &&
token.
length() > 3) {
return new
PredicateContextAttribute(
token.
substring(2,
token.
length() - 1));
} else if (
token.
startsWith("$")) {
return new
PredicateContextAttribute(
token.
substring(1,
token.
length()));
}
return null;
}
@
Override
public int
priority() {
return 0;
}
}
}