io.undertow.predicate.EqualsPredicate Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* 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.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
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;
}
@Override
public String toString() {
return "equals( {" + Arrays.asList( attributes ).stream().map(a->a.toString()).collect(Collectors.joining(", ")) + "} )";
}
public static class Builder implements PredicateBuilder {
@Override
public String name() {
return "equals";
}
@Override
public Map> parameters() {
final Map> params = new HashMap<>();
params.put("value", ExchangeAttribute[].class);
return params;
}
@Override
public Set requiredParameters() {
return Collections.singleton("value");
}
@Override
public String defaultParameter() {
return "value";
}
@Override
public Predicate build(final Map config) {
ExchangeAttribute[] value = (ExchangeAttribute[]) config.get("value");
return new EqualsPredicate(value);
}
}
}