summaryrefslogtreecommitdiffstats
path: root/src/org/apache/http/protocol/UriPatternMatcher.java
diff options
context:
space:
mode:
Diffstat (limited to 'src/org/apache/http/protocol/UriPatternMatcher.java')
-rw-r--r--src/org/apache/http/protocol/UriPatternMatcher.java127
1 files changed, 127 insertions, 0 deletions
diff --git a/src/org/apache/http/protocol/UriPatternMatcher.java b/src/org/apache/http/protocol/UriPatternMatcher.java
new file mode 100644
index 0000000..2870d99
--- /dev/null
+++ b/src/org/apache/http/protocol/UriPatternMatcher.java
@@ -0,0 +1,127 @@
+/*
+ * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/UriPatternMatcher.java $
+ * $Revision: 630662 $
+ * $Date: 2008-02-24 11:40:51 -0800 (Sun, 24 Feb 2008) $
+ *
+ * ====================================================================
+ * 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.http.protocol;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+/**
+ * Maintains a map of objects keyed by a request URI pattern.
+ * Instances can be looked up by request URI.<br/>
+ * Patterns may have three formats:
+ * <ul>
+ * <li><code>*</code></li>
+ * <li><code>*&lt;uri&gt;</code></li>
+ * <li><code>&lt;uri&gt;*</code></li>
+ * </ul>
+ *
+ * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
+ *
+ * @version $Revision: 630662 $
+ */
+public class UriPatternMatcher {
+
+ private final Map handlerMap;
+
+ public UriPatternMatcher() {
+ super();
+ this.handlerMap = new HashMap();
+ }
+
+ public void register(final String pattern, final Object handler) {
+ if (pattern == null) {
+ throw new IllegalArgumentException("URI request pattern may not be null");
+ }
+ if (handler == null) {
+ throw new IllegalArgumentException("HTTP request handelr may not be null");
+ }
+ this.handlerMap.put(pattern, handler);
+ }
+
+ public void unregister(final String pattern) {
+ if (pattern == null) {
+ return;
+ }
+ this.handlerMap.remove(pattern);
+ }
+
+ public void setHandlers(final Map map) {
+ if (map == null) {
+ throw new IllegalArgumentException("Map of handlers may not be null");
+ }
+ this.handlerMap.clear();
+ this.handlerMap.putAll(map);
+ }
+
+ public Object lookup(String requestURI) {
+ if (requestURI == null) {
+ throw new IllegalArgumentException("Request URI may not be null");
+ }
+ //Strip away the query part part if found
+ int index = requestURI.indexOf("?");
+ if (index != -1) {
+ requestURI = requestURI.substring(0, index);
+ }
+
+ // direct match?
+ Object handler = this.handlerMap.get(requestURI);
+ if (handler == null) {
+ // pattern match?
+ String bestMatch = null;
+ for (Iterator it = this.handlerMap.keySet().iterator(); it.hasNext();) {
+ String pattern = (String) it.next();
+ if (matchUriRequestPattern(pattern, requestURI)) {
+ // we have a match. is it any better?
+ if (bestMatch == null
+ || (bestMatch.length() < pattern.length())
+ || (bestMatch.length() == pattern.length() && pattern.endsWith("*"))) {
+ handler = this.handlerMap.get(pattern);
+ bestMatch = pattern;
+ }
+ }
+ }
+ }
+ return handler;
+ }
+
+ protected boolean matchUriRequestPattern(final String pattern, final String requestUri) {
+ if (pattern.equals("*")) {
+ return true;
+ } else {
+ return
+ (pattern.endsWith("*") && requestUri.startsWith(pattern.substring(0, pattern.length() - 1))) ||
+ (pattern.startsWith("*") && requestUri.endsWith(pattern.substring(1, pattern.length())));
+ }
+ }
+
+}