/*
* 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.predicate;
import java.util.
Collections;
import java.util.
HashMap;
import java.util.
Map;
import java.util.
Set;
import io.undertow.attribute.
ExchangeAttribute;
import io.undertow.server.
HttpServerExchange;
/**
* Returns true if all the provided arguments are equal to each other
*
* @author Stuart Douglas
*/
public class
EqualsPredicate implements
Predicate {
private final
ExchangeAttribute[]
attributes;
EqualsPredicate(final
ExchangeAttribute[]
attributes) {
this.
attributes =
attributes;
}
@
Override
public boolean
resolve(final
HttpServerExchange value) {
if(
attributes.length < 2) {
return true;
}
String first =
attributes[0].
readAttribute(
value);
for(int
i = 1;
i <
attributes.length; ++
i) {
String current =
attributes[
i].
readAttribute(
value);
if(
first == null) {
if(
current != null) {
return false;
}
} else if(
current == null) {
return false;
} else if(!
first.
equals(
current)) {
return false;
}
}
return true;
}
public static class
Builder implements
PredicateBuilder {
@
Override
public
String name() {
return "equals";
}
@
Override
public
Map<
String,
Class<?>>
parameters() {
final
Map<
String,
Class<?>>
params = new
HashMap<>();
params.
put("value",
ExchangeAttribute[].class);
return
params;
}
@
Override
public
Set<
String>
requiredParameters() {
return
Collections.
singleton("value");
}
@
Override
public
String defaultParameter() {
return "value";
}
@
Override
public
Predicate build(final
Map<
String,
Object>
config) {
ExchangeAttribute[]
value = (
ExchangeAttribute[])
config.
get("value");
return new
EqualsPredicate(
value);
}
}
}