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 015package org.apache.tapestry.wml; 016 017import org.apache.tapestry.util.text.AsciiCharacterMatcher; 018import org.apache.tapestry.util.text.AsciiCharacterTranslator; 019import org.apache.tapestry.util.text.ICharacterMatcher; 020import org.apache.tapestry.util.text.ICharacterTranslator; 021import org.apache.tapestry.util.text.ICharacterTranslatorSource; 022import 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 */ 033public 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}