| /* |
| * 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.sling.sample.slingshot.impl; |
| |
| |
| public abstract class Util { |
| |
| private static final String ALLOWED_CHARS = "abcdefghijklmnopqrstuvwxyz0123456789_"; |
| private static final char REPLACEMENT_CHAR = '_'; |
| |
| public static String filter(final String rsrcname) { |
| final StringBuilder sb = new StringBuilder(); |
| char lastAdded = 0; |
| |
| final String name = rsrcname.toLowerCase(); |
| for(int i=0; i < name.length(); i++) { |
| final char c = name.charAt(i); |
| char toAdd = c; |
| |
| if (ALLOWED_CHARS.indexOf(c) < 0) { |
| if (lastAdded == REPLACEMENT_CHAR) { |
| // do not add several _ in a row |
| continue; |
| } |
| toAdd = REPLACEMENT_CHAR; |
| |
| } else if(i == 0 && Character.isDigit(c)) { |
| sb.append(REPLACEMENT_CHAR); |
| } |
| |
| sb.append(toAdd); |
| lastAdded = toAdd; |
| } |
| |
| if (sb.length()==0) { |
| sb.append(REPLACEMENT_CHAR); |
| } |
| |
| return sb.toString(); |
| } |
| |
| |
| } |