/*
* 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 io.undertow.server.
HttpServerExchange;
/**
* Exchange attribute that represents a combination of attributes that should be merged into a single string.
*
* @author Stuart Douglas
*/
public class
CompositeExchangeAttribute implements
ExchangeAttribute {
private final
ExchangeAttribute[]
attributes;
public
CompositeExchangeAttribute(
ExchangeAttribute[]
attributes) {
ExchangeAttribute[]
copy = new
ExchangeAttribute[
attributes.length];
System.
arraycopy(
attributes, 0,
copy, 0,
attributes.length);
this.
attributes =
copy;
}
@
Override
public
String readAttribute(
HttpServerExchange exchange) {
final
StringBuilder sb = new
StringBuilder();
for (int
i = 0;
i <
attributes.length; ++
i) {
final
String val =
attributes[
i].
readAttribute(
exchange);
if(
val != null) {
sb.
append(
val);
}
}
return
sb.
toString();
}
@
Override
public void
writeAttribute(
HttpServerExchange exchange,
String newValue) throws
ReadOnlyAttributeException {
throw new
ReadOnlyAttributeException("combined",
newValue);
}
}