Archive for November, 2011
Algorithrm Links
November 28, 2011
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http://inder-gnu.blogspot.com/2007/07/binary-search-in-rortated-array-across_25.html
http://datastructure-puzzles-codesolutions.blogspot.com/
http://www.mytechinterviews.com/category/bit-manipulation
Categories: Algorithms
Binary Search in a sorted rotated array
November 28, 2011
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public class RotatedBinarySearch { private long[] input ={ 8, 9, 10, 1, 2, 3, 4, 5, 6, 7 }; private long searchElement = 8; public RotatedBinarySearch() { System.out.println("Element found at index ::" + rotatedSearch(input, 0, input.length - 1,searchElement)); } public int rotatedSearch(long[] values, int start, int end, long x) { int middle = (start + end) / 2; long startVal = values[start]; long midval = values[middle]; long endVal = values[end]; if (startVal == x) { return start; } else if (endVal == x) { return end; } else if (end - start == 1) { return -1; } if (startVal <= midval) { if (x <= midval && x >= startVal) { return rotatedSearch(values, start, middle, x); } else { return rotatedSearch(values, middle, end, x); } } else if (midval <= endVal) { if (x >= midval && x <= endVal) { return rotatedSearch(values, middle, end, x); } else { return rotatedSearch(values, start, middle, x); } } else { return -1; } } public static void main(String[] args) { new RotatedBinarySearch(); } }
Categories: Algorithms
Binary Search Implementation with out Recursion
November 28, 2011
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public class BinarySearch { private long [] input = {1,2,3,4,5,6,7,8,9,10}; private long searchElement = 10; public BinarySearch() { printSearchIndex(input); } public void printSearchIndex(long [] input) { long currElement = 0; int index = 0; int startIndex = 0; int endIndex = input.length; while(startIndex < endIndex) { index = (startIndex + endIndex)/2; currElement = input[index]; if(currElement > searchElement) { endIndex = index - 1; }else if(currElement < searchElement) { startIndex = index + 1; }else { System.out.println("Element found at "+index); return; } } } public static void main(String[] args) { new BinarySearch(); } }
Categories: Algorithms
Implementing Binary Search using Recursion
November 28, 2011
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public class BinarySearch { private long [] input = {1,2,3,4,5,6,7,8,9,10}; private long searchElement = 10; public BinarySearch() { System.out.println("Element found at index ::"+getSearchIndex(input,0,input.length -1)); } public long getSearchIndex(long [] input , int beginIndex , int endIndex) { int index = (beginIndex + endIndex) / 2; if(input[index] == searchElement) { return index; }else if(input[index] < searchElement) { return getSearchIndex(input,index+1 , endIndex); }else { return getSearchIndex(input,beginIndex ,index - 1); } } public static void main(String[] args) { new BinarySearch(); } }
Categories: Algorithms
Java Program for calculating X^n in o(log n ) time complexity
November 21, 2011
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public class TestMain { private static long hits1; private static long hits2; public static void main(String[] args) { TestMain main = new TestMain(); System.out.println("Normal Result ::"+main.power(2,31)); System.out.println("Hits ::"+hits1); System.out.println("Optimised Result ::"+main.normalPow(2,31)); System.out.println("Hits ::"+hits2); } public long normalPow(long x , long n) { long result = 1; while(n > 0) { result = result * x; n--; //for calculating hits hits2++; } return result; } public long power(long x , long n) { //for calculating hits hits1 ++; if(n == 0) { return 1; } long temp = power(x,n/2); if( n%2 == 0) { return (temp * temp ); }else { return (temp * temp * x); } } }
Categories: Algorithms
FileUpload HTML Page
November 17, 2011
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<!--<span class="hiddenSpellError" pre=""-->DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Strict//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>File download and upload sample</title> css" href="css/jquery-ui-1.7.2.custom.css" rel="stylesheet" /> <script type="text/<span class=">// <![CDATA[ javascript</span>" src="js/jquery-1.3.2.min.js"> // ]]></script> <script type="text/<span class=">// <![CDATA[ javascript</span>" src="js/jquery-ui-1.7.2.custom.min.js"> // ]]></script> <script type="text/<span class=">// <![CDATA[ javascript</span>" src="js/jquery.form.js"> // ]]></script> <script type="text/javascript"> $(document).ready(function() { $(function() { $("#tabs").tabs(); }); $( "#status" ).hide(); $( "#fileListResult" ).hide(); // attach handler to form's submit event $('#uploadKeyForm').submit(function() { // submit the form $(this).ajaxSubmit(function(e) { $( "#message" ).html(e); $( "#status" ).show(); $('#uploadKeyForm').clearForm(); }); return false; }); // attach handler to form's submit event $('#fileListForm').submit(function() { // submit the form $(this).ajaxSubmit(function(e) { $( "#fileListResult" ).html(e); $( "#fileListResult" ).show(); $( "#fileListForm" ).clearForm(); }); return false; }); }); function showDialog( text ) { $("#dialog").attr({ innerHTML: text }); $("#dialog").dialog( { bgiframe: true, modal: false, }); $("#dialog").dialog( 'open' ); } </script> </head> <body> <div> <div>20px; padding: 0 .7em;"></div> <p align="center"> Health Control Panel</p> </div> </div> <br /> <div id="tabs"> <ul> <li><a href="#tabs-1">Upload File</a></li> <li><a href="#tabs-2">Download File</a></li> </ul> <div id="tabs-1" title="Upload File">1px solid black; text-align: left;"></div> <form id="uploadKeyForm" action="/<span class=" method="post" enctype="multipart/form-data">Commonsfileuploadservlet" target="submitFrame"></form> <table width="100%"> <tr> <td> <div id="status"> <div>20px; padding: 0 .7em;"></div> <p id="message" align="center">Health Control Panel</p> </div> </div> </td> </tr> <tr> <td> <table> <tr> <td>Start IP-Address*</td> <td><input id="sIp" name="sIp" type="text"></td> </tr> <tr> <td>End IP-Address</td> <td><input id="eIp" name="eIp" type="text"></td> </tr> <tr> <td>User Name*</td> <td><input id="un" name="un" type="text"></td> </tr> <tr> <td>Password*</td> <td><input id="pwd" name="pwd" type="password"></td> </tr> <tr> <td>Destination Dir*</td> <td><input id="dd" name="dd" type="text"></td> </tr> <tr> <td>File*</td> <td><input id="ks" name="ks" type="file"></td> </tr> <tr> <td><input type="submit" id="uploadKey" value="Upload File"></td> </tr> </table> </td> </tr> </table> </form> <iframe id="submitFrame" name="submitFrame" style="display: none; visibility: hidden"> <div id="tabs-2" title="Download File">1px solid black; text-align: left;"></div> <form id="fileListForm" action="/<span class=" method="post">listFiles" target="submitListFrame"></form> <table width="100%"> <tr> <td> <table> <tr> <td>Server IP*</td> <td><input id="tsIP" name="tsIP" type="text"></td> </tr> <tr> <td>User Name*</td> <td><input id="tUN" name="tUN" type="text"></td> </tr> <tr> <td>Password*</td> <td><input id="tpwd" name="tpwd" type="password"></td> </tr> <tr> <td>Destination Dir</td> <td><input id="dd" name="dd" type="text"></td> </tr> <tr> <td><input type="submit" id="listFiles" value="List Files"></td> </tr> </table> </td> </tr> </table> </form> <div id="fileListResult"></div> </div> </div> </body> </html>
Categories: General
FileUploadServlet
November 17, 2011
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import java.io.File; import java.io.IOException; import java.io.PrintWriter; import java.util.Iterator; import java.util.List; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.rapidhealth.dao.RapidHealthDAO; import com.rapidhealth.pojo.DiscoveryConfig; import com.rapidhealth.scp.SCPDispatcher; import com.rapidhealth.utils.ApplicationContextHolder; public class FileUploadServlet extends HttpServlet { private final Logger log = LoggerFactory.getLogger(FileUploadServlet.class); private static final String TMP_DIR_PATH = "/tmp"; private static final String DESTINATION_DIR_PATH = "/repository"; private File tmpDir; private File destinationDir; private String realPath; public void init(ServletConfig config) throws ServletException { super.init(config); tmpDir = new File(TMP_DIR_PATH); if (!tmpDir.isDirectory()) { throw new ServletException(TMP_DIR_PATH + " is not a directory"); } realPath = getServletContext().getRealPath(DESTINATION_DIR_PATH); destinationDir = new File(realPath); if (!destinationDir.isDirectory()) { throw new ServletException(DESTINATION_DIR_PATH + " is not a directory"); } } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String fileName = null; PrintWriter out = response.getWriter(); DiskFileItemFactory fileItemFactory = new DiskFileItemFactory(); /* * Set the size threshold, above which content will be stored on disk. */ fileItemFactory.setSizeThreshold(1 * 1024 * 1024); // 1 MB /* * Set the temporary directory to store the uploaded files of size above * threshold. */ fileItemFactory.setRepository(tmpDir); ServletFileUpload uploadHandler = new ServletFileUpload(fileItemFactory); try { /* * Parse the request */ List items = uploadHandler.parseRequest(request); Iterator itr = items.iterator(); DiscoveryConfig config = new DiscoveryConfig(); while (itr.hasNext()) { FileItem fi = (FileItem) itr.next(); /* * Handle Form Fields. */ if ( fi.isFormField() ) { System.out.println("File Name = " + fi.getFieldName() + ", Value = " + fi.getString()); if(fi.getFieldName().equals("sIp")) { config.setStartIp(fi.getString()); }else if(fi.getFieldName().equals("eIp")) { config.setEndIp(fi.getString()); }else if(fi.getFieldName().equals("un")) { config.setUserName(fi.getString()); }else if(fi.getFieldName().equals("pwd")) { config.setPwd(fi.getString()); }else if(fi.getFieldName().equals("dd")) { config.setDestFileDirLoc(fi.getString()); } } else { fileName = fi.getName(); config.setFileName(fileName); config.setFileLoc(realPath+File.separatorChar+fileName); config.setCreatedDateTime(System.currentTimeMillis()); File file = new File(destinationDir, fi.getName()); fi.write(file); } } log.info("File {} uploaded successfully at location {}",fileName,destinationDir); RapidHealthDAO healthDAO = (RapidHealthDAO)ApplicationContextHolder.getAppContext().getBean("rapidDAO"); healthDAO.saveorupdate(config); log.debug("Configuration Saved to DB Successfully"); SCPDispatcher dispatcher = (SCPDispatcher)ApplicationContextHolder.getAppContext().getBean("scpPool"); dispatcher.startupload(config); log.debug("File {} started uploading",config.getFileName()); out.print("File upload started successfully"); } catch (Exception ex) { log("Error encountered while parsing the request", ex); out.print("Failed to save data"); } out.close(); } }
Categories: General