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StringTool.java

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package net.threebit.utils.sosc;

/*
        Copyright 2003 Shawn Deleurme
        Copyright 2003 Kevin O'Donnell

        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
        (at your option) 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
*/

import com.oreilly.servlet.*;
import java.io.*;
import java.sql.*;
import java.util.*;
import javax.servlet.jsp.*;
import javax.servlet.http.*;

public class StringTool {

        static public String anglosize (String original) throws Exception {
                if (original == null) { return null; }
                if (original.length() == 0) { return original; }
                byte[] bytes = original.getBytes();
                return new String(bytes, 0, bytes.length, "US-ASCII");
        }

  static public String fileToString (String path) throws IOException {
                return streamToString( new FileInputStream( path ));
                /*
                File file = new File(path);
    StringBuffer sb = new StringBuffer();
    String line;
    BufferedReader br = new BufferedReader( new FileReader( file ));
    while ((line = br.readLine()) != null) { sb.append(line + "\n"); }
    return sb.toString();
                */
  }

        static public String streamToString (InputStream in) throws IOException {
    StringBuffer sb = new StringBuffer();
    String line;
    BufferedReader br = new BufferedReader( new InputStreamReader( in ));
    while ((line = br.readLine()) != null) { sb.append(line + "\n"); }
    return sb.toString();
        }

        static public String appendPadding (String destination, int desiredLength) throws Exception {
                return appendPadding(destination, " ", desiredLength);
        }

        static public String appendPadding (String destination, String padChar, int desiredLength) throws Exception {
                if (padChar == null) { throw new Exception("Cannot pad the string with a null!"); }
                if (padChar.length() != 1) { throw new Exception("Pad char must be of length 1 ('" + padChar + "')"); }

                // Silently allow nulls to be treated as empty strings.
                if (destination == null) { destination = ""; }

                // Truncate if necessary; no need to pad if we are truncating
                if (destination.length() > desiredLength) { return destination.substring(0,desiredLength); }

                // Padd the end with the specified character and return.
                StringBuffer sb = new StringBuffer(destination);
                while (sb.length() < desiredLength) { sb.append(padChar); }
                return sb.toString();
        }

}

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