miscutils.java

eq跨平台查询工具源码 eq跨平台查询工具源码

/*
 * MiscUtils.java
 *
 * Copyright (C) 2002, 2003, 2004, 2005, 2006 Takis Diakoumis
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */


package org.underworldlabs.util;

import java.awt.event.KeyEvent;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.sql.SQLException;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.Vector;
import java.util.jar.JarFile;
import java.util.zip.ZipEntry;
import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.KeyStroke;

/* ----------------------------------------------------------
 * CVS NOTE: Changes to the CVS repository prior to the 
 *           release of version 3.0.0beta1 has meant a 
 *           resetting of CVS revision numbers.
 * ----------------------------------------------------------
 */

/**
 *
 * @author   Takis Diakoumis
 * @author   Dragan Vasic
 * @version  $Revision: 1.9 $
 * @date     $Date: 2006/09/21 07:24:23 $
 */
public class MiscUtils {
    
    public static final String ACTION_DELIMETER = "+";
    
    private static DecimalFormat oneDigitFormat;
    private static DecimalFormat twoDigitFormat;
    private static DecimalFormat threeDigitFormat;

    private MiscUtils() {}
    
    
    /**
     * Checks if the specified value is <code>null</code>.
     * This will also return <code>true</code> if the length
     * of the specified value is zero.
     *
     * @param value the value to check for <code>null</code>
     * @return <code>true</code> | <code>false</code>
     */
    public static boolean isNull(String value) {
        return value == null || value.trim().length() == 0;
    }
    
    /**
     * Tests if the specified value contains the specified
     * word as a WHOLE word.
     *
     * @param value the value to test for the word
     * @param word the whole word we are looking for
     * @return <code>true</code> if found, <code>false</code> otherwise
     */
    public static boolean containsWholeWord(String value, String word) {
        
        int index = value.indexOf(word);
        
        if (index == -1)
            return false;
        
        int valueLength = value.length();
        int wordLength = word.length();
        int indexLength = index + wordLength;
        
        if (indexLength == valueLength) // same word
            return true;
        
        if (indexLength != valueLength) { // check for embedded word
            
            if (index > 0) {
                return Character.isWhitespace(value.charAt(indexLength)) &&
                        Character.isWhitespace(value.charAt(index - 1));
            }
            else {
                return Character.isWhitespace(value.charAt(indexLength));
            }

        }        
        else {
            return true;
        }
        
        
    }
    
    public static String getExceptionName(Throwable e) {
        String exceptionName = "";
        if (e.getCause() != null) {
            Throwable _e = e.getCause();
            exceptionName = _e.getClass().getName();
        } else {
            exceptionName = e.getClass().getName();
        }
        
        int index = exceptionName.lastIndexOf('.');
        if (index != -1) {
            exceptionName = exceptionName.substring(index+1);
        }
        return exceptionName;
    }
    
    public static String firstLetterToUpper(String value) {
        boolean nextUpper = false;
        char[] chars = value.toCharArray();
        StringBuffer sb = new StringBuffer(chars.length);
        
        for (int i = 0; i < chars.length; i++) {
            
            if (i == 0 || nextUpper) {
                sb.append(Character.toUpperCase(chars[i]));
                nextUpper = false;
                continue;
            }
            
            if (Character.isWhitespace(chars[i])) {
                nextUpper = true;
                sb.append(chars[i]);
                continue;
            }
            
            sb.append(Character.toLowerCase(chars[i]));
            nextUpper = false;
            
        }
        return sb.toString();
    }
    
    /**
     * Formats the specified the SQL exception object
     * displaying the error message, error code and 
     * the SQL state code.
     *
     * @param e - the SQL exception
     */
    public static String formatSQLError(SQLException e) {
        if (e == null) {
            return "";
        }
        StringBuffer sb = new StringBuffer();
        sb.append(e.getMessage());
        sb.append("\nError Code: " + e.getErrorCode());

        String state = e.getSQLState();
        if (state != null) {
            sb.append("\nSQL State Code: " + state);
        }
        sb.append("\n");
        return sb.toString();
    }
    
    /**
     * Returns a <code>String</code> array of the the CSV value
     * specified with the specfied delimiter.
     *
     * @param csvString the CSV value
     * @param delim the delimiter used in the CSV value
     * @return an array of split values
     */
    public static String[] splitSeparatedValues(String csvString, String delim) {
        StringTokenizer st = new StringTokenizer(csvString, delim);
        ArrayList list = new ArrayList(st.countTokens());
        
        while (st.hasMoreTokens()) {
            list.add(st.nextToken());
        }
        
        String[] values = (String[])list.toArray(new String[list.size()]);
        return values;
    }
    
    public static boolean containsValue(String[] values, String value) {
        
        for (int i = 0; i < values.length; i++) {
            
            if (values[i].compareTo(value) == 0) {
                return true;
            }
            
        }
        
        return false;

    }
    
    public static boolean isValidNumber(String number) {
        char[] chars = number.toCharArray();
        
        for (int i = 0; i < chars.length; i++) {
            
            if (!Character.isDigit(chars[i])) {
                return false;
            }
            
        }
        
        return true;
        
    }
    
    public static String getClassName(String path) {
        int index = path.indexOf(".class");
        
        if (index == -1) {
            return null;
        }

        char dot = '.';
        char pathSeparator = '/';
        char[] chars = path.toCharArray();
        StringBuffer sb = new StringBuffer(chars.length);
        
        for (int i = 0; i < chars.length; i++) {
            
            if (i == index) {
                break;
            }

            if (chars[i] == pathSeparator) {
                sb.append(dot);
            } else {
                sb.append(chars[i]);
            }

        }

        return sb.toString();
    }

    public static String[] findImplementingClasses(
            String interfaceName, String paths) throws MalformedURLException, IOException {
        return findImplementingClasses(interfaceName, paths, true);
    }
    
    public static String[] findImplementingClasses(
            String interfaceName, String paths, boolean interfaceOnly) 
            throws MalformedURLException, IOException {

        URL[] urls = loadURLs(paths);
        URLClassLoader loader = new URLClassLoader(
                urls, ClassLoader.getSystemClassLoader());

        JarFile jarFile = null;
        String className = null;
        String[] files = splitSeparatedValues(paths, ";");
        ArrayList clazzes = new ArrayList();
        
        for (int i = 0; i < files.length; i++) {

            jarFile = new JarFile(files[i]);

            for (Enumeration j = jarFile.entries(); j.hasMoreElements();) {
                ZipEntry entry = (ZipEntry)j.nextElement();
                className = getClassName(entry.getName());

                if (className == null) {