/*
 * 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.Map;

import io.undertow.server.HttpServerExchange;
import io.undertow.util.AttachmentKey;

A predicate.
This is mainly used by handlers as a way to decide if a request should have certain
processing applied, based on the given conditions.
Author:
Stuart Douglas/**
 * A predicate.
 *
 * This is mainly used by handlers as a way to decide if a request should have certain
 * processing applied, based on the given conditions.
 *
 * @author Stuart Douglas
 */
public interface Predicate {

    
Attachment key that can be used to store additional predicate context that allows the predicates to store
additional information. For example a predicate that matches on a regular expression can place additional
information about match groups into the predicate context.
Predicates must not rely on this attachment being present, it will only be present if the predicate is being
used in a situation where this information may be required by later handlers.
/**
     * Attachment key that can be used to store additional predicate context that allows the predicates to store
     * additional information. For example a predicate that matches on a regular expression can place additional
     * information about match groups into the predicate context.
     *
     * Predicates must not rely on this attachment being present, it will only be present if the predicate is being
     * used in a situation where this information may be required by later handlers.
     *
     */
    AttachmentKey<Map<String, Object>> PREDICATE_CONTEXT = AttachmentKey.create(Map.class);

    boolean resolve(final HttpServerExchange value);

}