001 // Copyright 2004, 2005 The Apache Software Foundation 002 // 003 // Licensed under the Apache License, Version 2.0 (the "License"); 004 // you may not use this file except in compliance with the License. 005 // You may obtain a copy of the License at 006 // 007 // http://www.apache.org/licenses/LICENSE-2.0 008 // 009 // Unless required by applicable law or agreed to in writing, software 010 // distributed under the License is distributed on an "AS IS" BASIS, 011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012 // See the License for the specific language governing permissions and 013 // limitations under the License. 014 015 package org.apache.tapestry.wml; 016 017 import org.apache.tapestry.util.text.AsciiCharacterMatcher; 018 import org.apache.tapestry.util.text.AsciiCharacterTranslator; 019 import org.apache.tapestry.util.text.ICharacterMatcher; 020 import org.apache.tapestry.util.text.ICharacterTranslator; 021 import org.apache.tapestry.util.text.ICharacterTranslatorSource; 022 import org.apache.tapestry.util.text.MarkupCharacterTranslator; 023 024 /** 025 * The WML implementation of a character translator source. 026 * Returns a WML translator that encodes everything that is non-safe. 027 * 028 * Some code borrowed from WMLWriter (by David Solis) 029 * 030 * @author mb 031 * @since 4.0 032 */ 033 public class WMLCharacterTranslatorSource implements ICharacterTranslatorSource 034 { 035 private static final String SAFE_CHARACTERS = 036 "01234567890" 037 + "abcdefghijklmnopqrstuvwxyz" 038 + "ABCDEFGHIJKLMNOPQRSTUVWXYZ" 039 + "\t\n\r !\"#%'()*+,-./:;=?@[\\]^_`{|}~"; 040 041 private static final String[][] ENTITIES = { 042 { "\"", """ }, 043 { "<", "<" }, 044 { ">", ">" }, 045 { "&", "&" }, 046 { "$", "$$" } 047 }; 048 049 private static final ICharacterMatcher SAFE_MATCHER = new AsciiCharacterMatcher(SAFE_CHARACTERS); 050 private static final ICharacterTranslator ENTITY_TRANSLATOR = new AsciiCharacterTranslator(ENTITIES); 051 052 private static final ICharacterTranslator WML_TRANSLATOR = new MarkupCharacterTranslator(true, SAFE_MATCHER, ENTITY_TRANSLATOR); 053 054 /** 055 * @see org.apache.tapestry.util.text.ICharacterTranslatorSource#getDefaultTranslator() 056 */ 057 public ICharacterTranslator getDefaultTranslator() { 058 return WML_TRANSLATOR; 059 } 060 061 /** 062 * @see org.apache.tapestry.util.text.ICharacterTranslatorSource#getTranslator(java.lang.String) 063 */ 064 public ICharacterTranslator getTranslator(String encoding) { 065 return getDefaultTranslator(); 066 } 067 }