| /* |
| * Copyright (C) 2010 Google Inc. |
| * |
| * 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 com.google.clearsilver.jsilver.functions.escape; |
| |
| import com.google.clearsilver.jsilver.functions.TextFilter; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStreamWriter; |
| import java.io.UnsupportedEncodingException; |
| import java.net.URLEncoder; |
| |
| /** |
| * This URL encodes the string. This converts characters such as ?, ampersands, and = into their URL |
| * safe equivilants using the %hh syntax. |
| */ |
| public class UrlEscapeFunction implements TextFilter { |
| |
| private final String encoding; |
| |
| public UrlEscapeFunction(String encoding) { |
| try { |
| // Sanity check. Fail at construction time rather than render time. |
| new OutputStreamWriter(new ByteArrayOutputStream(), encoding); |
| } catch (UnsupportedEncodingException e) { |
| throw new IllegalArgumentException("Unsupported encoding : " + encoding); |
| } |
| this.encoding = encoding; |
| } |
| |
| @Override |
| public void filter(String in, Appendable out) throws IOException { |
| try { |
| out.append(URLEncoder.encode(in, encoding)); |
| } catch (UnsupportedEncodingException e) { |
| // The sanity check in the constructor should have caught this. |
| // Things must be really broken for this to happen, so throw an Error. |
| throw new Error("Unsuported encoding : " + encoding); |
| } |
| } |
| |
| } |