| // Copyright 2008 The Apache Software Foundation |
| // |
| // 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 org.apache.tapestry5.services; |
| |
| /** |
| * Service used to encode or decode strings that are placed into URLs. This is used as an alternative to UUEncoding. |
| * Alphabetics, numbers and some punctuation ("-", "_", ".", ":") are passed through as is, the "$" character is an |
| * escape, followed by either another "$", or by a four digit hex unicode number. A null input (not a blank input, but |
| * actual null) has a special encoding, "$N". Likewise, the blank string has the special encoding "$B". |
| */ |
| public interface URLEncoder |
| { |
| /** |
| * Given an input value containing any characters, returns the input string, or an encoded version of the string (as |
| * outlined above). |
| * |
| * @param input string to be encoded, which may be null |
| * @return encoded version of input |
| */ |
| String encode(String input); |
| |
| /** |
| * Given a previously encoded string, returns the original input. |
| * |
| * @param input encoded string (may not be null) |
| * @return decoded input |
| */ |
| String decode(String input); |
| } |