| /* |
| * 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. |
| */ |
| package org.apache.felix.http.base.internal.util; |
| |
| import java.util.StringTokenizer; |
| |
| /** |
| * Some convenience utilities to deal with path patterns. |
| */ |
| public abstract class PatternUtil |
| { |
| |
| /** |
| * Check for valid servlet pattern |
| * @param pattern The pattern |
| * @return {@code true} if its valid |
| */ |
| public static boolean isValidPattern(final String pattern) |
| { |
| if ( pattern == null ) |
| { |
| return false; |
| } |
| if ( pattern.indexOf("?") != -1 ) |
| { |
| return false; |
| } |
| // default and root |
| if ( pattern.length() == 0 || pattern.equals("/") ) |
| { |
| return true; |
| } |
| // extension |
| if ( pattern.startsWith("*.") ) |
| { |
| return pattern.indexOf("/") == -1; |
| } |
| if ( !pattern.startsWith("/") ) |
| { |
| return false; |
| } |
| final int pos = pattern.indexOf('*'); |
| if ( pos != -1 && pos < pattern.length() - 1 ) |
| { |
| return false; |
| } |
| if ( pos != -1 && pattern.charAt(pos - 1) != '/') |
| { |
| return false; |
| } |
| if ( pattern.charAt(pattern.length() - 1) == '/') |
| { |
| return false; |
| } |
| return true; |
| } |
| |
| // check for valid symbolic name |
| public static boolean isValidSymbolicName(final String name) |
| { |
| if ( name == null || name.isEmpty() ) |
| { |
| return false; |
| } |
| boolean valid = true; |
| boolean expectToken = false; |
| boolean done = false; |
| final StringTokenizer st = new StringTokenizer(name, ".", true); |
| while ( !done && st.hasMoreTokens() ) |
| { |
| final String token = st.nextToken(); |
| if ( expectToken ) |
| { |
| if ( !".".equals(token) ) |
| { |
| valid = false; |
| done = true; |
| } |
| else |
| { |
| expectToken = false; |
| } |
| } |
| else |
| { |
| if ( ".".equals(token) ) |
| { |
| valid = false; |
| done = true; |
| } |
| else |
| { |
| int i = 0; |
| while ( i < token.length() && valid ) |
| { |
| final char c = token.charAt(i); |
| i++; |
| if ( c >= 'a' && c <= 'z' ) |
| { |
| continue; |
| } |
| if ( c >= 'A' && c <= 'Z' ) |
| { |
| continue; |
| } |
| if ( c >= '0' && c <= '9' ) |
| { |
| continue; |
| } |
| if ( c == '-' || c == '_' ) |
| { |
| continue; |
| } |
| valid = false; |
| done = true; |
| } |
| } |
| expectToken = true; |
| } |
| } |
| if ( !expectToken ) |
| { |
| valid = false; |
| } |
| |
| return valid; |
| } |
| } |