| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.mina.util; |
| |
| import java.io.IOException; |
| import java.io.LineNumberReader; |
| import java.io.PrintWriter; |
| import java.io.StringReader; |
| import java.io.StringWriter; |
| import java.util.ArrayList; |
| |
| /** |
| * Utility class for working with xml data |
| * |
| * Implementation is heavily based on org.apache.log4j.helpers.Transform |
| * |
| * @author <a href="http://mina.apache.org">Apache MINA Project</a> |
| */ |
| public class Transform { |
| |
| private static final String CDATA_START = "<![CDATA["; |
| |
| private static final String CDATA_END = "]]>"; |
| |
| private static final String CDATA_PSEUDO_END = "]]>"; |
| |
| private static final String CDATA_EMBEDED_END = CDATA_END + CDATA_PSEUDO_END + CDATA_START; |
| |
| private static final int CDATA_END_LEN = CDATA_END.length(); |
| |
| /** |
| * This method takes a string which may contain HTML tags (ie, |
| * <b>, <table>, etc) and replaces any |
| * '<', '>' , '&' or '"' |
| * characters with respective predefined entity references. |
| * |
| * @param input The text to be converted. |
| * @return The input string with the special characters replaced. |
| * */ |
| public static String escapeTags(String input) { |
| // Check if the string is null, zero length or devoid of special characters |
| // if so, return what was sent in. |
| |
| if (input == null || input.length() == 0) { |
| return input; |
| } |
| |
| StringBuilder buf = new StringBuilder(input.length() + 6); |
| char ch; |
| |
| int len = input.length(); |
| |
| for (int i = 0; i < len; i++) { |
| ch = input.charAt(i); |
| |
| switch ( ch ) |
| { |
| case '<' : |
| buf.append("<"); |
| break; |
| |
| case '>' : |
| buf.append(">"); |
| break; |
| |
| case '&' : |
| buf.append("&"); |
| break; |
| |
| case '"' : |
| buf.append("""); |
| break; |
| |
| default : |
| buf.append(ch); |
| } |
| } |
| |
| return buf.toString(); |
| } |
| |
| /** |
| * Ensures that embeded CDEnd strings (]]>) are handled properly |
| * within message, NDC and throwable tag text. |
| * |
| * @param buf StringBuffer holding the XML data to this point. The |
| * initial CDStart (<![CDATA[) and final CDEnd (]]>) of the CDATA |
| * section are the responsibility of the calling method. |
| * @param str The String that is inserted into an existing CDATA Section within buf. |
| * */ |
| public static void appendEscapingCDATA(final StringBuilder buf, final String str) { |
| if (str != null) { |
| int end = str.indexOf(CDATA_END); |
| |
| if (end < 0) { |
| buf.append(str); |
| } else { |
| int start = 0; |
| |
| while (end > -1) { |
| buf.append(str.substring(start, end)); |
| buf.append(CDATA_EMBEDED_END); |
| start = end + CDATA_END_LEN; |
| |
| if (start < str.length()) { |
| end = str.indexOf(CDATA_END, start); |
| } else { |
| return; |
| } |
| } |
| |
| buf.append(str.substring(start)); |
| } |
| } |
| } |
| |
| /** |
| * Converts a Throwable into an array of Strings |
| * @param throwable The Throwable to convert |
| * @return string representation of the throwable |
| */ |
| public static String[] getThrowableStrRep(Throwable throwable) { |
| StringWriter sw = new StringWriter(); |
| PrintWriter pw = new PrintWriter(sw); |
| throwable.printStackTrace(pw); |
| pw.flush(); |
| LineNumberReader reader = new LineNumberReader(new StringReader(sw.toString())); |
| ArrayList<String> lines = new ArrayList<>(); |
| |
| try { |
| String line = reader.readLine(); |
| |
| while (line != null) { |
| lines.add(line); |
| line = reader.readLine(); |
| } |
| } catch (IOException ex) { |
| lines.add(ex.toString()); |
| } |
| |
| String[] rep = new String[lines.size()]; |
| lines.toArray(rep); |
| |
| return rep; |
| } |
| } |