textutils.java

来自「spam source codejasen-0.9jASEN - java An」· Java 代码 · 共 104 行

/*
 * @(#)TextUtils.java	4/11/2004
 *
 * Copyright (c) 2004, 2005  jASEN.org
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in
 *      the documentation and/or other materials provided with the distribution.
 *
 *   3. The names of the authors may not be used to endorse or promote products
 *      derived from this software without specific prior written permission.
 *
 *   4. Any modification or additions to the software must be contributed back
 *      to the project.
 *
 *   5. Any investigation or reverse engineering of source code or binary to
 *      enable emails to bypass the filters, and hence inflict spam and or viruses
 *      onto users who use or do not use jASEN could subject the perpetrator to
 *      criminal and or civil liability.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JASEN.ORG,
 * OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
package org.jasen.util;

import java.util.regex.Pattern;

/**
 * <P>
 * 	General text-related utility functions.
 * </P>
 * @author Jason Polites
 */
public class TextUtils
{

    /**
     * Matches a single keyword in a blob of text.
     * <p>
     * This is simply a convenience method and is used by the KeywordScanner
     * </p>
     * @param keywords
     * @param content
     * @return True if the keyword was found in the content.  False otherwise
     * @see org.jasen.plugins.KeywordScanner
     */
    public static boolean matchKeyword(String[] keywords, String content) {

        String keyword = null;
        Pattern p = null;
        String punctRegex = "[!,\\.;:?$%@\\s\"']{1}";

        for (int i = 0; i < keywords.length; i++)
        {
            keyword = punctRegex + keywords[i] + punctRegex;
            p = Pattern.compile(keyword, Pattern.CASE_INSENSITIVE | Pattern.DOTALL);

            if(p.matcher(content).find()) {
                return true;
            }
        }

        return false;
    }

    /**
     * Counts the number of given characters in the given string
     * @param str
     * @param chr
     * @return The number of occurrences of the given character in the given string
     */
    public static int countChars(String str, char chr) {
        int count = 0;

        if(str != null) {
            char[] chars = str.toCharArray();

            for (int i = 0; i < chars.length; i++) {
                if(chars[i] == chr) {
                    count++;
                }
            }
        }

        return count;
    }
}