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| <a name="1" href="#1">1</a> <em class="jxr_comment">/*</em> |
| <a name="2" href="#2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</em> |
| <a name="3" href="#3">3</a> <em class="jxr_comment"> * contributor license agreements. See the NOTICE file distributed with</em> |
| <a name="4" href="#4">4</a> <em class="jxr_comment"> * this work for additional information regarding copyright ownership.</em> |
| <a name="5" href="#5">5</a> <em class="jxr_comment"> * The ASF licenses this file to You under the Apache License, Version 2.0</em> |
| <a name="6" href="#6">6</a> <em class="jxr_comment"> * (the "License"); you may not use this file except in compliance with</em> |
| <a name="7" href="#7">7</a> <em class="jxr_comment"> * the License. You may obtain a copy of the License at</em> |
| <a name="8" href="#8">8</a> <em class="jxr_comment"> * </em> |
| <a name="9" href="#9">9</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em> |
| <a name="10" href="#10">10</a> <em class="jxr_comment"> * </em> |
| <a name="11" href="#11">11</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em> |
| <a name="12" href="#12">12</a> <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em> |
| <a name="13" href="#13">13</a> <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em> |
| <a name="14" href="#14">14</a> <em class="jxr_comment"> * See the License for the specific language governing permissions and</em> |
| <a name="15" href="#15">15</a> <em class="jxr_comment"> * limitations under the License.</em> |
| <a name="16" href="#16">16</a> <em class="jxr_comment"> */</em> |
| <a name="17" href="#17">17</a> |
| <a name="18" href="#18">18</a> <strong class="jxr_keyword">package</strong> org.apache.log4j.helpers; |
| <a name="19" href="#19">19</a> |
| <a name="20" href="#20">20</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="21" href="#21">21</a> <em class="jxr_javadoccomment"> Utility class for transforming strings.</em> |
| <a name="22" href="#22">22</a> |
| <a name="23" href="#23">23</a> <em class="jxr_javadoccomment"> @author Ceki G&uuml;lc&uuml;</em> |
| <a name="24" href="#24">24</a> <em class="jxr_javadoccomment"> @author Michael A. McAngus </em> |
| <a name="25" href="#25">25</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="26" href="#26">26</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/log4j/helpers/Transform.html">Transform</a> { |
| <a name="27" href="#27">27</a> |
| <a name="28" href="#28">28</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String CDATA_START = <span class="jxr_string">"<![CDATA["</span>; |
| <a name="29" href="#29">29</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String CDATA_END = <span class="jxr_string">"]]>"</span>; |
| <a name="30" href="#30">30</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String CDATA_PSEUDO_END = <span class="jxr_string">"]]&gt;"</span>; |
| <a name="31" href="#31">31</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String CDATA_EMBEDED_END = CDATA_END + CDATA_PSEUDO_END + CDATA_START; |
| <a name="32" href="#32">32</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> CDATA_END_LEN = CDATA_END.length(); |
| <a name="33" href="#33">33</a> |
| <a name="34" href="#34">34</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="35" href="#35">35</a> <em class="jxr_javadoccomment"> * This method takes a string which may contain HTML tags (ie,</em> |
| <a name="36" href="#36">36</a> <em class="jxr_javadoccomment"> * &lt;b&gt;, &lt;table&gt;, etc) and replaces any</em> |
| <a name="37" href="#37">37</a> <em class="jxr_javadoccomment"> * '<', '>' , '&' or '"'</em> |
| <a name="38" href="#38">38</a> <em class="jxr_javadoccomment"> * characters with respective predefined entity references.</em> |
| <a name="39" href="#39">39</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="40" href="#40">40</a> <em class="jxr_javadoccomment"> * @param input The text to be converted.</em> |
| <a name="41" href="#41">41</a> <em class="jxr_javadoccomment"> * @return The input string with the special characters replaced.</em> |
| <a name="42" href="#42">42</a> <em class="jxr_javadoccomment"> * */</em> |
| <a name="43" href="#43">43</a> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">public</strong> String escapeTags(<strong class="jxr_keyword">final</strong> String input) { |
| <a name="44" href="#44">44</a> <em class="jxr_comment">//Check if the string is null, zero length or devoid of special characters</em> |
| <a name="45" href="#45">45</a> <em class="jxr_comment">// if so, return what was sent in.</em> |
| <a name="46" href="#46">46</a> |
| <a name="47" href="#47">47</a> <strong class="jxr_keyword">if</strong>(input == <strong class="jxr_keyword">null</strong> |
| <a name="48" href="#48">48</a> || input.length() == 0 |
| <a name="49" href="#49">49</a> || (input.indexOf('"') == -1 && |
| <a name="50" href="#50">50</a> input.indexOf('&') == -1 && |
| <a name="51" href="#51">51</a> input.indexOf('<') == -1 && |
| <a name="52" href="#52">52</a> input.indexOf('>') == -1)) { |
| <a name="53" href="#53">53</a> <strong class="jxr_keyword">return</strong> input; |
| <a name="54" href="#54">54</a> } |
| <a name="55" href="#55">55</a> |
| <a name="56" href="#56">56</a> <em class="jxr_comment">//Use a StringBuffer in lieu of String concatenation -- it is</em> |
| <a name="57" href="#57">57</a> <em class="jxr_comment">//much more efficient this way.</em> |
| <a name="58" href="#58">58</a> |
| <a name="59" href="#59">59</a> StringBuffer buf = <strong class="jxr_keyword">new</strong> StringBuffer(input.length() + 6); |
| <a name="60" href="#60">60</a> <strong class="jxr_keyword">char</strong> ch = ' '; |
| <a name="61" href="#61">61</a> |
| <a name="62" href="#62">62</a> <strong class="jxr_keyword">int</strong> len = input.length(); |
| <a name="63" href="#63">63</a> <strong class="jxr_keyword">for</strong>(<strong class="jxr_keyword">int</strong> i=0; i < len; i++) { |
| <a name="64" href="#64">64</a> ch = input.charAt(i); |
| <a name="65" href="#65">65</a> <strong class="jxr_keyword">if</strong> (ch > '>') { |
| <a name="66" href="#66">66</a> buf.append(ch); |
| <a name="67" href="#67">67</a> } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong>(ch == '<') { |
| <a name="68" href="#68">68</a> buf.append(<span class="jxr_string">"&lt;"</span>); |
| <a name="69" href="#69">69</a> } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong>(ch == '>') { |
| <a name="70" href="#70">70</a> buf.append(<span class="jxr_string">"&gt;"</span>); |
| <a name="71" href="#71">71</a> } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong>(ch == '&') { |
| <a name="72" href="#72">72</a> buf.append(<span class="jxr_string">"&amp;"</span>); |
| <a name="73" href="#73">73</a> } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong>(ch == '"') { |
| <a name="74" href="#74">74</a> buf.append(<span class="jxr_string">"&quot;"</span>); |
| <a name="75" href="#75">75</a> } <strong class="jxr_keyword">else</strong> { |
| <a name="76" href="#76">76</a> buf.append(ch); |
| <a name="77" href="#77">77</a> } |
| <a name="78" href="#78">78</a> } |
| <a name="79" href="#79">79</a> <strong class="jxr_keyword">return</strong> buf.toString(); |
| <a name="80" href="#80">80</a> } |
| <a name="81" href="#81">81</a> |
| <a name="82" href="#82">82</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="83" href="#83">83</a> <em class="jxr_javadoccomment"> * Ensures that embeded CDEnd strings (]]>) are handled properly</em> |
| <a name="84" href="#84">84</a> <em class="jxr_javadoccomment"> * within message, NDC and throwable tag text.</em> |
| <a name="85" href="#85">85</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="86" href="#86">86</a> <em class="jxr_javadoccomment"> * @param buf StringBuffer holding the XML data to this point. The</em> |
| <a name="87" href="#87">87</a> <em class="jxr_javadoccomment"> * initial CDStart (<![CDATA[) and final CDEnd (]]>) of the CDATA</em> |
| <a name="88" href="#88">88</a> <em class="jxr_javadoccomment"> * section are the responsibility of the calling method.</em> |
| <a name="89" href="#89">89</a> <em class="jxr_javadoccomment"> * @param str The String that is inserted into an existing CDATA Section within buf. </em> |
| <a name="90" href="#90">90</a> <em class="jxr_javadoccomment"> * */</em> |
| <a name="91" href="#91">91</a> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> appendEscapingCDATA(<strong class="jxr_keyword">final</strong> StringBuffer buf, |
| <a name="92" href="#92">92</a> <strong class="jxr_keyword">final</strong> String str) { |
| <a name="93" href="#93">93</a> <strong class="jxr_keyword">if</strong> (str != <strong class="jxr_keyword">null</strong>) { |
| <a name="94" href="#94">94</a> <strong class="jxr_keyword">int</strong> end = str.indexOf(CDATA_END); |
| <a name="95" href="#95">95</a> <strong class="jxr_keyword">if</strong> (end < 0) { |
| <a name="96" href="#96">96</a> buf.append(str); |
| <a name="97" href="#97">97</a> } <strong class="jxr_keyword">else</strong> { |
| <a name="98" href="#98">98</a> <strong class="jxr_keyword">int</strong> start = 0; |
| <a name="99" href="#99">99</a> <strong class="jxr_keyword">while</strong> (end > -1) { |
| <a name="100" href="#100">100</a> buf.append(str.substring(start, end)); |
| <a name="101" href="#101">101</a> buf.append(CDATA_EMBEDED_END); |
| <a name="102" href="#102">102</a> start = end + CDATA_END_LEN; |
| <a name="103" href="#103">103</a> <strong class="jxr_keyword">if</strong> (start < str.length()) { |
| <a name="104" href="#104">104</a> end = str.indexOf(CDATA_END, start); |
| <a name="105" href="#105">105</a> } <strong class="jxr_keyword">else</strong> { |
| <a name="106" href="#106">106</a> <strong class="jxr_keyword">return</strong>; |
| <a name="107" href="#107">107</a> } |
| <a name="108" href="#108">108</a> } |
| <a name="109" href="#109">109</a> buf.append(str.substring(start)); |
| <a name="110" href="#110">110</a> } |
| <a name="111" href="#111">111</a> } |
| <a name="112" href="#112">112</a> } |
| <a name="113" href="#113">113</a> } |
| </pre> |
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