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/* * Copyright 1999,2004,2012 The Apache Software Foundation. * * 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. */ // Copied from GenerationJava Core Library. //package com.generationjava.web; // Copied in kune from: // http://svn.apache.org/repos/asf/jakarta/taglibs/proper/string/trunk/src/org/apache/taglibs/string/util/XmlW.java package cc.kune.core.server.utils; import org.apache.commons.lang.StringUtils; // TODO: Auto-generated Javadoc /** * XML helping static methods. * * @author bayard@generationjava.com * @version 0.4 20010812 */ final public class XmlW { // @PMD:REVIEWED:AvoidReassigningParameters: by vjrj on 21/05/09 14:13 /** * Escape xml. * * @param str * the str * @return the string */ static public String escapeXml(String str) { str = StringUtils.replace(str, "&", "&"); str = StringUtils.replace(str, "<", "<"); str = StringUtils.replace(str, ">", ">"); str = StringUtils.replace(str, "\"", """); str = StringUtils.replace(str, "'", "'"); return str; } /** * Gets the attribute. * * @param attribute * the attribute * @param text * the text * @return the attribute */ static public String getAttribute(final String attribute, final String text) { return getAttribute(attribute, text, 0); } /** * Gets the attribute. * * @param attribute * the attribute * @param text * the text * @param idx * the idx * @return the attribute */ static public String getAttribute(final String attribute, final String text, final int idx) { final int close = text.indexOf(">", idx); final int attrIdx = text.indexOf(attribute + "=\"", idx); if (attrIdx == -1) { return null; } if (attrIdx > close) { return null; } final int attrStartIdx = attrIdx + attribute.length() + 2; final int attrCloseIdx = text.indexOf("\"", attrStartIdx); if (attrCloseIdx > close) { return null; } return unescapeXml(text.substring(attrStartIdx, attrCloseIdx)); } // @PMD:REVIEWED:AvoidReassigningParameters: by vjrj on 21/05/09 14:13 /** * Gets the content. * * @param tag * the tag * @param text * the text * @return the content */ static public String getContent(final String tag, String text) { int idx = XmlW.getIndexOpeningTag(tag, text); if (idx == -1) { return ""; } text = text.substring(idx); final int end = XmlW.getIndexClosingTag(tag, text); idx = text.indexOf('>'); if (idx == -1) { return ""; } return text.substring(idx + 1, end); } // Pass in "para" and a string that starts with // <para> and it will return the index of the matching </para> // It assumes well-formed xml. Or well enough. /** * Gets the index closing tag. * * @param tag * the tag * @param text * the text * @return the index closing tag */ static public int getIndexClosingTag(final String tag, final String text) { return getIndexClosingTag(tag, text, 0); } /** * Gets the index closing tag. * * @param tag * the tag * @param text * the text * @param start * the start * @return the index closing tag */ static public int getIndexClosingTag(final String tag, final String text, final int start) { final String open = "<" + tag; final String close = "</" + tag + ">"; // System.err.println("OPEN: "+open); // System.err.println("CLOSE: "+close); final int closeSz = close.length(); int nextCloseIdx = text.indexOf(close, start); // System.err.println("first close: "+nextCloseIdx); if (nextCloseIdx == -1) { return -1; } int count = StringUtils.countMatches(text.substring(start, nextCloseIdx), open); // System.err.println("count: "+count); if (count == 0) { return -1; // tag is never opened } int expected = 1; while (count != expected) { nextCloseIdx = text.indexOf(close, nextCloseIdx + closeSz); if (nextCloseIdx == -1) { return -1; } count = StringUtils.countMatches(text.substring(start, nextCloseIdx), open); expected++; } return nextCloseIdx; } /** * Gets the index opening tag. * * @param tag * the tag * @param text * the text * @return the index opening tag */ static public int getIndexOpeningTag(final String tag, final String text) { return getIndexOpeningTag(tag, text, 0); } /** * Gets the index opening tag. * * @param tag * the tag * @param text * the text * @param start * the start * @return the index opening tag */ static private int getIndexOpeningTag(final String tag, final String text, final int start) { // consider whitespace? final int idx = text.indexOf("<" + tag, start); if (idx == -1) { return -1; } final char next = text.charAt(idx + 1 + tag.length()); if ((next == '>') || Character.isWhitespace(next)) { return idx; } else { return getIndexOpeningTag(tag, text, idx + 1); } } /** * Remove any xml tags from a String. Same as HtmlW's method. * * @param str * the str * @return the string */ static public String removeXml(final String str) { final int sz = str.length(); final StringBuffer buffer = new StringBuffer(sz); // boolean inString = false; boolean inTag = false; for (int i = 0; i < sz; i++) { final char ch = str.charAt(i); if (ch == '<') { inTag = true; } else if (ch == '>') { inTag = false; continue; } if (!inTag) { buffer.append(ch); } } return buffer.toString(); } // @PMD:REVIEWED:AvoidReassigningParameters: by vjrj on 21/05/09 14:13 /** * Unescape xml. * * @param str * the str * @return the string */ static public String unescapeXml(String str) { str = StringUtils.replace(str, "&", "&"); str = StringUtils.replace(str, "<", "<"); str = StringUtils.replace(str, ">", ">"); str = StringUtils.replace(str, """, "\""); str = StringUtils.replace(str, "'", "'"); return str; } }