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 * 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,
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 *  See the License for the specific language governing permissions and
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package io.undertow.servlet.predicate;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import javax.servlet.DispatcherType;

import io.undertow.predicate.Predicate;
import io.undertow.predicate.PredicateBuilder;
import io.undertow.server.HttpServerExchange;
import io.undertow.servlet.handlers.ServletRequestContext;

Predicate that returns true if the dispatcher type matches the specified type.
Author:Stuart Douglas
/** * Predicate that returns true if the dispatcher type matches the specified type. * * @author Stuart Douglas */
public class DispatcherTypePredicate implements Predicate { public static final DispatcherTypePredicate FORWARD = new DispatcherTypePredicate(DispatcherType.FORWARD); public static final DispatcherTypePredicate INCLUDE = new DispatcherTypePredicate(DispatcherType.INCLUDE); public static final DispatcherTypePredicate REQUEST = new DispatcherTypePredicate(DispatcherType.REQUEST); public static final DispatcherTypePredicate ASYNC = new DispatcherTypePredicate(DispatcherType.ASYNC); public static final DispatcherTypePredicate ERROR = new DispatcherTypePredicate(DispatcherType.ERROR); private final DispatcherType dispatcherType; public DispatcherTypePredicate(final DispatcherType dispatcherType) { this.dispatcherType = dispatcherType; } @Override public boolean resolve(final HttpServerExchange value) { return value.getAttachment(ServletRequestContext.ATTACHMENT_KEY).getDispatcherType() == dispatcherType; } @Override public String toString() { return "dispatcher( " + dispatcherType.toString() + " )"; } public static class Builder implements PredicateBuilder { @Override public String name() { return "dispatcher"; } @Override public Map<String, Class<?>> parameters() { final Map<String, Class<?>> params = new HashMap<>(); params.put("value", String.class); return params; } @Override public Set<String> requiredParameters() { final Set<String> params = new HashSet<>(); params.add("value"); return params; } @Override public String defaultParameter() { return "value"; } @Override public Predicate build(final Map<String, Object> config) { String value = (String) config.get("value"); return new DispatcherTypePredicate(DispatcherType.valueOf(value)); } } }