corelyzer.util.StringUtility.java Source code

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Here is the source code for corelyzer.util.StringUtility.java

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/******************************************************************************
 *
 * CoreWall / Corelyzer - An Initial Core Description Tool
 * Copyright (C) 2007 Julian Yu-Chung Chen
 * Electronic Visualization Laboratory, University of Illinois at Chicago
 *
 * This software is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either Version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This software 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser Public License along
 * with this software; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Questions or comments about CoreWall should be directed to
 * cavern@evl.uic.edu
 *
 *****************************************************************************/
package corelyzer.util;

import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.File;
import java.io.IOException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import org.apache.commons.codec.binary.Hex;

public class StringUtility {

    public static String capitalizeHeadingCharacter(final String value) {
        return value.length() > 0 ? Character.toUpperCase(value.charAt(0)) + value.substring(1) : value;
    }

    public static String expandNums(final String anIntString, final int length) {
        if (anIntString.length() > length) {
            return anIntString;
        } else {
            StringBuilder sb = new StringBuilder();

            for (int i = 0; i < length - anIntString.length(); ++i) {
                sb.append("0");
            }
            sb.append(anIntString);

            return sb.toString();
        }
    }

    // Courtesy of :
    // http://exampledepot.com/egs/java.awt.datatransfer/ToClip.html
    public static String getClipboard() {
        Transferable t = Toolkit.getDefaultToolkit().getSystemClipboard().getContents(null);

        try {
            if (t != null && t.isDataFlavorSupported(DataFlavor.stringFlavor)) {
                String text = (String) t.getTransferData(DataFlavor.stringFlavor);
                return text;
            }
        } catch (UnsupportedFlavorException e) {
        } catch (IOException e) {
        }

        return "";
    }

    public static String getExtension(final File f) {
        if (f != null) {
            String filename = f.getName();
            int i = filename.lastIndexOf('.');
            if (i > 0 && i < filename.length() - 1) {
                return filename.substring(i + 1).toLowerCase();
            }
        }

        return null;
    }

    public static String getSHASum(final String aString) {
        String hash;

        try {
            MessageDigest md = MessageDigest.getInstance("SHA");
            md.update(aString.getBytes());

            Hex hex = new Hex();
            hash = new String(hex.encode(md.digest()));
        } catch (NoSuchAlgorithmException e) {
            System.err.println("---> [Error] NoSuchAlgorithmException!");
            hash = "no-sha";
        }

        return hash;
    }

    public static String normalizeFilename(final String filePathString, final int length) {
        String filenameString = new File(filePathString).getName();

        if (filenameString.length() > length) {
            String extension = getExtension(new File(filePathString));
            int endIndex = length * 2 / 3;
            filenameString = filenameString.substring(0, endIndex) + "..." + extension;
        }

        return filenameString;
    }

    public static void setClipboard(final String aString) {
        StringSelection stringSelection = new StringSelection(aString);
        Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();

        clipboard.setContents(stringSelection, new ClipboardOwner() {

            public void lostOwnership(final Clipboard clipboard, final Transferable transferable) {
                // do nothing
            }
        });
    }

    // the reverse of expandNums()
    public static String shrinkStringToANumber(String inputStr) {
        while (inputStr.substring(0, 1).equals("0")) {
            inputStr = inputStr.substring(1);
        }

        return inputStr;
    }
}