001: /*
002: * Copyright (c) 2002-2008 Gargoyle Software Inc. All rights reserved.
003: *
004: * Redistribution and use in source and binary forms, with or without
005: * modification, are permitted provided that the following conditions are met:
006: *
007: * 1. Redistributions of source code must retain the above copyright notice,
008: * this list of conditions and the following disclaimer.
009: * 2. Redistributions in binary form must reproduce the above copyright notice,
010: * this list of conditions and the following disclaimer in the documentation
011: * and/or other materials provided with the distribution.
012: * 3. The end-user documentation included with the redistribution, if any, must
013: * include the following acknowledgment:
014: *
015: * "This product includes software developed by Gargoyle Software Inc.
016: * (http://www.GargoyleSoftware.com/)."
017: *
018: * Alternately, this acknowledgment may appear in the software itself, if
019: * and wherever such third-party acknowledgments normally appear.
020: * 4. The name "Gargoyle Software" must not be used to endorse or promote
021: * products derived from this software without prior written permission.
022: * For written permission, please contact info@GargoyleSoftware.com.
023: * 5. Products derived from this software may not be called "HtmlUnit", nor may
024: * "HtmlUnit" appear in their name, without prior written permission of
025: * Gargoyle Software Inc.
026: *
027: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
028: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
029: * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GARGOYLE
030: * SOFTWARE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
031: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
032: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
033: * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
034: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
035: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
036: * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
037: */
038: package com.gargoylesoftware.htmlunit.util;
039:
040: /**
041: * String utilities class for utility functions not covered by third party libraries.
042: *
043: * @version $Revision: 2132 $
044: * @author Daniel Gredler
045: */
046: public final class StringUtils {
047:
048: /**
049: * Disallow instantiation of this class.
050: */
051: private StringUtils() {
052: // Empty.
053: }
054:
055: /**
056: * Escapes the characters '<', '>' and '&' into their XML entity equivalents. Note that
057: * sometimes we have to use this method instead of
058: * {@link org.apache.commons.lang.StringEscapeUtils#escapeXml(String)} or
059: * {@link org.apache.commons.lang.StringEscapeUtils#escapeHtml(String)} because those methods
060: * escape some unicode characters as well.
061: *
062: * @param s the string to escape
063: * @return the escaped form of the specified string
064: */
065: public static String escapeXmlChars(final String s) {
066: final StringBuffer sb = new StringBuffer(s.length() * 2);
067: for (int i = 0; i < s.length(); i++) {
068: final char c = s.charAt(i);
069: switch (c) {
070: case '<':
071: sb.append("<");
072: break;
073: case '>':
074: sb.append(">");
075: break;
076: case '&':
077: sb.append("&");
078: break;
079: default:
080: sb.append(c);
081: }
082: }
083: return sb.toString();
084: }
085:
086: /**
087: * Returns <tt>true</tt> if the specified string contains whitespace, <tt>false</tt> otherwise.
088: *
089: * @param s the string to check for whitespace
090: * @return <tt>true</tt> if the specified string contains whitespace, <tt>false</tt> otherwise
091: */
092: public static boolean containsWhitespace(final String s) {
093: for (int i = 0; i < s.length(); i++) {
094: final char c = s.charAt(i);
095: if (Character.isWhitespace(c)) {
096: return true;
097: }
098: }
099: return false;
100: }
101:
102: }
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