| /* |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.hc.core5.http.protocol; |
| |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.regex.Pattern; |
| |
| import org.apache.hc.core5.annotation.Contract; |
| import org.apache.hc.core5.annotation.ThreadingBehavior; |
| import org.apache.hc.core5.util.Args; |
| |
| /** |
| * Maintains a map of objects keyed by a request URI regular expression. |
| * |
| * <p> |
| * The insertion order is in maintained in that map such that the lookup tests each regex until there is a match. This |
| * class can be used to resolve an object matching a particular request URI. |
| * </p> |
| * |
| * @param <T> The type of registered objects. |
| * @since 5.0 |
| */ |
| @Contract(threading = ThreadingBehavior.SAFE) |
| public class UriRegexMatcher<T> implements LookupRegistry<T> { |
| |
| private final Map<String, T> objectMap; |
| private final Map<String, Pattern> patternMap; |
| |
| public UriRegexMatcher() { |
| super(); |
| this.objectMap = new LinkedHashMap<>(); |
| this.patternMap = new LinkedHashMap<>(); |
| } |
| |
| /** |
| * Registers the given object for URIs matching the given regex. |
| * |
| * @param regex |
| * the regex to register the handler for. |
| * @param obj |
| * the object. |
| */ |
| @Override |
| public synchronized void register(final String regex, final T obj) { |
| Args.notNull(regex, "URI request regex"); |
| this.objectMap.put(regex, obj); |
| this.patternMap.put(regex, Pattern.compile(regex)); |
| } |
| |
| /** |
| * Removes registered object, if exists, for the given regex. |
| * |
| * @param regex |
| * the regex to unregister. |
| */ |
| @Override |
| public synchronized void unregister(final String regex) { |
| if (regex == null) { |
| return; |
| } |
| this.objectMap.remove(regex); |
| this.patternMap.remove(regex); |
| } |
| |
| /** |
| * Looks up an object matching the given request path. |
| * |
| * @param path |
| * the request path |
| * @return object or {@code null} if no match is found. |
| */ |
| @Override |
| public synchronized T lookup(final String path) { |
| Args.notNull(path, "Request path"); |
| // direct match? |
| final T obj = this.objectMap.get(path); |
| if (obj == null) { |
| // regex match? |
| for (final Entry<String, Pattern> entry : this.patternMap.entrySet()) { |
| if (entry.getValue().matcher(path).matches()) { |
| return objectMap.get(entry.getKey()); |
| } |
| } |
| } |
| return obj; |
| } |
| |
| @Override |
| public String toString() { |
| return this.objectMap.toString(); |
| } |
| |
| } |