MultiDownload.java
| Index Score | ||
|---|---|---|
 |
 |
xnap.net |
 |
 |
XNap 2 |
View: Reasons, Metrics, Source Code
These are the metrics that contribute to the Enerjy Score for this file, ranked by impact. So the metrics listed at the top influence the score to a greater extent that the metrics listed at the bottom.
| Metric | Description | |
|---|---|---|
| BLOCKS | Number of blocks |  |
| EXITS | Procedure exits | |
| COMPARISONS | Number of comparison operators | |
| CYCLOMATIC | Cyclomatic complexity | |
| LOC | Lines of code | |
| OPERATORS | Number of operators | |
| ELOC | Effective lines of code | |
| LINES | Number of lines in the source file | |
| PROGRAM_LENGTH | Halstead program length | |
| EXEC_COMMENTS | Comments in executable code | |
| JAVA0254 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| LOOPS | Number of loops | |
| LOGICAL_LINES | Number of statements | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| UNIQUE_OPERANDS | Number of unique operands | |
| LINE_COMMENT | Number of line comments | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| OPERANDS | Number of operands | |
| JAVA0049 | JAVA0049 Nested block at depth N (maximum: M) | |
| FUNCTIONS | Number of function declarations | |
| JAVA0008 | JAVA0008 Empty catch block | |
| RETURNS | Number of return points from functions | |
| DECL_COMMENTS | Comments in declarations | |
| SIZE | Size of the file in bytes | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| UNIQUE_OPERATORS | Number of unique operators | |
| NEST_DEPTH | Maximum nesting depth | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0179 | JAVA0179 Local variable hides visible field | |
| JAVA0264 | JAVA0264 Integer math in long context - check for overflow | |
| JAVA0030 | JAVA0030 Private field not used | |
| JAVA0100 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0080 | JAVA0080 Import declaration not used | |
| JAVA0130 | JAVA0130 Non-static method does not use instance fields | |
| WHITESPACE | Number of whitespace lines | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
/*
* XNap
*
* A pure java file sharing client.
*
* See AUTHORS for copyright information.
*
* 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
*
*/
package xnap.net;
import xnap.XNap;
import xnap.io.*;
import xnap.net.event.*;
import xnap.util.*;
import java.beans.*;
import java.io.*;
import java.net.*;
import java.text.*;
import java.util.*;
/**
* Downloads a file.
* Currently this class is limited to a single running download. This
* will be fixed in the future.
*
* Variables:
*
* <pre>
*
* offset initialsize (= resumeFile.length)
* |------|-------|-----------------| resumeFile.getFinalSize()
* |--| bytesTransferred
* |--------------| totalBytesTransferred
*
* </pre>
*
* The dlQueue and runQueue must not be modified without obtaining lock.
*/
public class MultiDownload extends AbstractTransferContainer
implements IDownloadContainer
{
//--- Constant(s) ---
public static final String XNAP3_RESUME_FILENAME_PREFIX
= ".xnap-openap-resume";
/**
* Retry remotely queued downloads.
*/
public static final int WAKEUP_INTERVAL = 30 * 1000;
//= Preferences.getInstance().getDownloadRetryInterval() * 1000;
/**
* Maximum retry count per download.
*/
public static final int MAX_TRIES
= Preferences.getInstance().getDownloadMaxTries();
//--- Data field(s) ---
private LinkedList dlQueue = new LinkedList();
private LinkedList runQueue = new LinkedList();
private UserContainer users = new UserContainer();
// FIX: this needs to be synchronized
private HashSet queued = new HashSet();
/**
* Currently running download.
*/
private IDownload download;
private ResumeFile3 resumeFile;
private Object lock = new Object();
/**
* Maximum concurrent downloads.
*/
private int maxDownloads;
private long offset;
private FileOutputStream out;
/**
* Milliseconds until next wake up.
*/
private long nextWakeUp = 0;
private File xnap3ResumeFile;
private static Hashtable stateTable = new Hashtable();
static {
State[][] table = new State[][] {
{ State.CONNECTING,
State.ABORTING, State.DOWNLOADING, State.FAILED, },
{ State.LOCALLY_QUEUED,
State.ABORTED, State.CONNECTING, },
{ State.NOT_STARTED,
State.CONNECTING, State.LOCALLY_QUEUED, State.NOT_STARTED, },
};
stateTable = FiniteStateMachine.createStateTable(table);
}
private FiniteStateMachine fsm
= new FiniteStateMachine(State.NOT_STARTED, stateTable);
//--- Constructor(s) ---
public MultiDownload(/*int maxDownloads*/)
{
//this.maxDownloads = maxDownloads;
maxDownloads = 1;
}
//--- Method(s) ---
public void die()
{
wakeup();
}
public boolean add(IDownload d)
{
if (d == null) {
return false;
}
if (d.getUser().getMaxDownloads() == IUser.TRANSFER_NEVER) {
logger.debug("not adding because is blocked: " + d);
return false;
}
synchronized (lock) {
if (!dlQueue.contains(d) && !runQueue.contains(d)
&& d.getTryCount() < MAX_TRIES) {
logger.debug("add " + file.getName());
dlQueue.addLast(d);
users.add(d.getUser());
wakeup();
return true;
}
}
return false;
}
public void clear()
{
synchronized (lock) {
dlQueue.clear();
runQueue.clear();
users.clear();
}
}
public void delete()
{
super.delete();
if (xnap3ResumeFile != null && xnap3ResumeFile.exists()) {
xnap3ResumeFile.delete();
xnap3ResumeFile = null;
}
}
/**
* Download is ready to rumble.
*/
public void start(IDownload d)
{
synchronized (lock) {
dlQueue.remove(d);
runQueue.addLast(d);
}
wakeup();
}
public void setQueuePos(IDownload d, int pos)
{
if (pos <= 0) {
queued.remove(d);
}
else {
logger.debug(this + " queued " + d + " at pos " + pos);
queued.add(d);
wakeup();
}
}
public void setFile(File newValue)
{
if (resumeFile != null) {
resumeFile = new ResumeFile3(newValue, resumeFile.getFinalSize(),
resumeFile.getFilterData());
super.setFile(resumeFile);
}
else {
super.setFile(newValue);
}
}
public String getFilename()
{
return (resumeFile != null) ? resumeFile.getFinalFilename() : "";
}
/**
* Returns the final filesize or -1 if no resume file is set.
*/
public long getFilesize()
{
return (resumeFile != null) ? resumeFile.getFinalSize() : -1;
}
public ResumeFile3 getResumeFile()
{
return resumeFile;
}
public void setResumeFile(ResumeFile3 newValue)
{
setFile(newValue);
resumeFile = newValue;
totalBytesTransferred = resumeFile.length();
xnap3ResumeFile = new File
(Preferences.getInstance().getIncompleteDir()
+ XNAP3_RESUME_FILENAME_PREFIX + "." + newValue.getName() + ".xnap2");
if (!xnap3ResumeFile.exists()) {
try {
OutputStream out
= new BufferedOutputStream(new FileOutputStream(xnap3ResumeFile));
try {
Properties p = new Properties();
p.setProperty("filename", newValue.getFinalFilename());
p.setProperty("filesize", newValue.getFinalSize() + "");
SearchFilterData data = newValue.getFilterData();
if (data != null && data.searchText != null) {
p.setProperty("searchText", data.searchText);
}
// FIX: the search realm is lost
p.setProperty("segment.0.filename", newValue.getAbsolutePath());
p.setProperty("segment.0.start", "0");
p.setProperty("segment.0.mergeFailCount", "0");
p.store(out, "Automatically generated XNap 2.5 OpenNap resume file - do not modify");
}
finally {
try {
out.close();
}
catch (IOException e) {
// this exception gets lost
}
}
}
catch (IOException e) {
logger.warn("Could not write XNap 3 resume file", e);
}
}
}
public long getTotalBytesTransferred()
{
return totalBytesTransferred;
}
public IUser getUser()
{
users.show((download != null) ? download.getUser() : null);
return users;
}
public int getQueueSize()
{
synchronized (lock) {
return dlQueue.size() + runQueue.size();
}
}
public String getStatusText()
{
if (getStatus() == STATUS_WAITING) {
long diff = (nextWakeUp - System.currentTimeMillis()) / 1000;
if (diff > 0) {
return MessageFormat.format(XNap.tr("retrying in {0} s"),
new Object[] { new Long(diff) });
}
}
return super.getStatusText();
}
public boolean isBusy()
{
synchronized (lock) {
return runQueue.size() > 0;
}
}
public boolean isFinished()
{
return totalBytesTransferred == getFilesize();
}
/**
* Adds download objects from <code>d</code> to our <code>dlQueue</code>.
*/
public void merge(MultiDownload d)
{
for (Iterator i = d.dlQueue.iterator(); i.hasNext();) {
add((IDownload)i.next());
}
// delete file created by AutoDownload in constructor
d.delete();
}
public void remove(IDownload d)
{
d.dequeue();
queued.remove(d);
synchronized (lock) {
dlQueue.remove(d);
users.remove(d.getUser());
}
logger.debug("removed download: " + d);
wakeup();
}
/**
* Resets all download counters.
*/
public void reset()
{
synchronized (lock) {
for (Iterator i = dlQueue.iterator(); i.hasNext();) {
IDownload d = (IDownload)i.next();
d.reset();
}
}
}
public void skip()
{
if (download != null) {
download.close();
}
}
public void run()
{
// shorten file by one byte, sometimes the last byte is not written
// to disk correctly if Java crashes. (observed on Debian GNU/Linux,
// Blackdown JDK 1.3.1)
if (resumeFile.length() < resumeFile.getFinalSize()) {
FileHelper.shorten(resumeFile, 1);
totalBytesTransferred = resumeFile.length();
}
try {
// append
out = new FileOutputStream(file.getAbsolutePath(), true);
}
catch (IOException e) {
setStatus(STATUS_FAILED, "Could not write file " + file.getName());
return;
}
download();
try {
out.flush();
out.close();
if (!die) {
if (isFinished()) {
try {
String dir = FileHelper.getDownloadDirFromExtension
(resumeFile.getFinalFilename());
File newFile = FileHelper.moveUnique
(file, dir, resumeFile.getFinalFilename());
setFile(newFile);
if (xnap3ResumeFile != null && xnap3ResumeFile.exists()) {
xnap3ResumeFile.delete();
xnap3ResumeFile = null;
}
setStatus(STATUS_SUCCESS);
}
catch (IOException e) {
logger.debug("could not rename finished file", e);
setStatus(STATUS_FAILED, XNap.tr("Could not create file (check download dir)"));
}
}
else {
setStatus(STATUS_FAILED, XNap.tr("incomplete"));
}
}
}
catch (IOException e) {
setStatus(STATUS_FAILED, XNap.tr("Could not close file"));
}
died();
}
public String toString()
{
return "MultiDownload " + getFilename();
}
/**
* This is called from within run.
*/
private void download()
{
while (!die && !isFinished()) {
long elapsedTime = 0;
synchronized (lock) {
// send enqueue for all dls
for (Iterator i = dlQueue.iterator(); i.hasNext();) {
IDownload d = (IDownload)i.next();
if (canStart(d)) {
d.enqueue(this);
}
else {
long diff
= System.currentTimeMillis() - d.getLastTry();
elapsedTime = Math.max(elapsedTime, diff);
}
setQueuePos(d, d.getQueuePos());
}
}
if (!die && !isFinished()) {
waitForAdd(elapsedTime);
}
boolean quit = false;
while (!die && !isFinished() && !quit) {
synchronized (lock) {
if (runQueue.size() == 0) {
quit = true;
}
else {
download = (IDownload)runQueue.getFirst();
logger.debug("MultiDownload: start " + download);
}
}
if (!quit) {
startDownload();
synchronized (lock) {
runQueue.removeFirst();
}
if (isFinished()) {
// readd
add(download);
}
else {
synchronized (lock) {
download = null;
}
}
// FIX ME
elapsedTime = WAKEUP_INTERVAL;
}
}
} // main while loop
dequeueAll();
logger.debug("finished");
}
/**
* Dequeues all downloads in <code>dlQueue</code>.
*/
private void dequeueAll()
{
synchronized (lock) {
// send enqueue for all dls
for (Iterator i = dlQueue.iterator(); i.hasNext();) {
IDownload d = (IDownload)i.next();
d.dequeue();
}
}
queued.clear();
}
private boolean canStart(IDownload d)
{
return (System.currentTimeMillis() - d.getLastTry()
> WAKEUP_INTERVAL);
}
private void startDownload()
{
logger.debug("starting download:" + download);
totalRate = -1;
offset = Math.max(totalBytesTransferred - 100, 0);
download.getUser().modifyLocalDownloadCount(1);
setStatus(STATUS_CONNECTING);
try {
if (download.connect(offset)) {
boolean retry = writeFile();
download.close();
totalRate = getAverageRate();
stopDownload(!isFinished() && retry);
}
else if (download.getTryCount() >= MAX_TRIES) {
remove(download);
}
else {
// requeue as last
synchronized(lock) {
dlQueue.addLast(download);
}
}
}
catch (IOException e) {
remove(download);
logger.warn("connect failed: " + e.getMessage());
}
download.getUser().modifyLocalDownloadCount(-1);
}
private void stopDownload(boolean requeue)
{
synchronized (lock) {
if (requeue) {
if (!dlQueue.contains(download)
&& download.getTryCount() < MAX_TRIES) {
dlQueue.addLast(download);
}
}
else {
remove(download);
}
}
}
/**
* @return false, if the download failed fataly and should not be retried
*/
public boolean writeFile()
{
setStatus(STATUS_DOWNLOADING);
// we need to catch aborts for slow connects quickly
byte[] data = new byte[512];
startTransfer();
try {
while (offset + bytesTransferred < getFilesize()) {
// wait for data
int byteCount = 0;
long startTime = System.currentTimeMillis();
while (byteCount == 0) {
if (die) {
throw new InterruptedException();
}
else if (System.currentTimeMillis() - startTime
> TRANSFER_TIMEOUT) {
throw (new IOException(XNap.tr("socket timeout")));
}
try {
// compute the number of bytes to read
long toRead = getFilesize() - offset - bytesTransferred;
int len = (int)Math.min(toRead, data.length);
// blocks for at most SOCKET_TIMEOUT
byteCount = download.read(data, 0, len);
}
catch (InterruptedIOException e) {
}
}
if (byteCount == -1) {
break;
}
if (offset + bytesTransferred < totalBytesTransferred) {
long diff = totalBytesTransferred - bytesTransferred;
int count = (int)Math.min(byteCount, diff - offset);
if (! checkFile(data, count)) {
logger.warn("resume failed");
return false;
}
if (count < byteCount) {
// write remainder
int len = (int)Math.min(byteCount - count,
getFilesize()
- totalBytesTransferred);
out.write(data, count, len);
totalBytesTransferred += len;
}
}
else {
int len = (int)Math.min(byteCount,
getFilesize()
- totalBytesTransferred);
out.write(data, 0, len);
totalBytesTransferred += len;
}
//
bytesTransferred += byteCount;
}
}
catch (IOException e) {
logger.warn("download failed " + e.getMessage());
}
catch (InterruptedException e) {
}
return true;
}
/**
* Compares <code>byteCount</code> bytes from incomplete file with newly
* downloaded bytes in <code>data</code>.
*/
private boolean checkFile(byte[] data, int byteCount)
{
RandomAccessFile raf;
try {
raf = new RandomAccessFile(file, "r");
}
catch (IOException e) {
logger.debug("file not found");
return false;
}
try {
byte[] array = new byte[byteCount];
try {
raf.seek(offset + bytesTransferred);
raf.readFully(array);
}
catch (IOException e) {
logger.debug("wrong number of bytes");
return false;
}
for (int i = 0; i < byteCount; i++) {
if (data[i] != array[i]) {
logger.debug("resume failed at "
+ (offset + bytesTransferred + i));
return false;
}
}
return true;
}
finally {
try {
raf.close();
}
catch (IOException e) {
}
}
}
public boolean equals(Object obj)
{
if (obj instanceof MultiDownload) {
MultiDownload d = (MultiDownload)obj;
if (d.getResumeFile() == null || getResumeFile() == null) {
return (this == obj);
}
return ((d.getResumeFile().getFinalSize()
== getResumeFile().getFinalSize())
&& (d.getResumeFile().getFilterData().searchText.equals
(getResumeFile().getFilterData().searchText)));
}
return false;
}
private void setWaitStatus(long elapsedTime)
{
if (runQueue.size() == 0) {
if (dlQueue.size() == 0) {
if (getStatus() != STATUS_SEARCHING) {
setStatus(STATUS_WAITING);
}
}
else {
if (queued.size() > 0) {
StringBuffer sb = new StringBuffer();
sb.append(MessageFormat.format
(XNap.tr("{0} queued"),
new Object[] {
new Integer(queued.size()) }));
sb.append(": ");
for (Iterator i = queued.iterator(); i.hasNext();) {
IDownload d = (IDownload)i.next();
sb.append(d.getUser().getName());
sb.append("@");
sb.append(d.getQueuePos());
if (i.hasNext()) {
sb.append(", ");
}
}
nextWakeUp = 0;
setStatus(STATUS_WAITING, sb.toString());
}
else {
nextWakeUp = (System.currentTimeMillis()
+ (WAKEUP_INTERVAL - elapsedTime));
setStatus(STATUS_WAITING);
}
}
}
}
/**
* Waits for add to runQueue or returns after elapsedTime ms.
*/
protected void waitForAdd(long elapsedTime)
{
setWaitStatus(elapsedTime);
// wait, dls will wake us up if something happened
synchronized (lock) {
if (runQueue.size() == 0) {
if (dlQueue.size() == 0) {
logger.debug("waiting for add" );
nextWakeUp = 0;
waitLock();
}
else {
logger.debug("waiting " + (WAKEUP_INTERVAL - elapsedTime));
waitLock(WAKEUP_INTERVAL - elapsedTime);
}
}
}
}
protected void waitLock(long time)
{
if (time <= 0) {
return;
}
synchronized (lock) {
try {
lock.wait(time);
}
catch (InterruptedException e) {
}
}
}
protected void waitLock()
{
synchronized (lock) {
try {
lock.wait();
}
catch (InterruptedException e) {
}
}
}
protected void wakeup()
{
synchronized (lock) {
lock.notify();
}
}
}
The table below shows all metrics for MultiDownload.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 150.00 | Number of blocks | |
| BLOCK_COMMENT | 22.00 | Number of block comment lines | |
| COMMENTS | 109.00 | Comment lines | |
| COMMENT_DENSITY | 0.27 | Comment density | |
| COMPARISONS | 86.00 | Number of comparison operators | |
| CYCLOMATIC | 116.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 22.00 | Comments in declarations | |
| DOC_COMMENT | 61.00 | Number of javadoc comment lines | |
| ELOC | 404.00 | Effective lines of code | |
| EXEC_COMMENTS | 18.00 | Comments in executable code | |
| EXITS | 105.00 | Procedure exits | |
| FUNCTIONS | 37.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 87.84 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 65.00 | Interface complexity | |
| JAVA0001 | 0.00 | JAVA0001 Package name does not contain only lower case letters | |
| JAVA0002 | 1.00 | JAVA0002 Package name does not begin with a top level domain name or country code | |
| JAVA0003 | 0.00 | JAVA0003 Minimize use of on-demand (.*) imports | |
| JAVA0004 | 0.00 | JAVA0004 Unnecessary import from java.lang | |
| JAVA0005 | 1.00 | JAVA0005 Imports not in specified order | |
| JAVA0006 | 0.00 | JAVA0006 Empty finally block | |
| JAVA0007 | 0.00 | JAVA0007 Should not declare public field | |
| JAVA0008 | 4.00 | JAVA0008 Empty catch block | |
| JAVA0009 | 0.00 | JAVA0009 Protected member in final class | |
| JAVA0010 | 0.00 | JAVA0010 Non-instantiable class does not contain a non-private static member | |
| JAVA0011 | 0.00 | JAVA0011 Abstract class does not contain an abstract method | |
| JAVA0012 | 0.00 | JAVA0012 Non-constructor method with same name as declaring class | |
| JAVA0013 | 0.00 | JAVA0013 Non-blank final field is not static | |
| JAVA0014 | 0.00 | JAVA0014 Class with only static members has non-private constructor | |
| JAVA0015 | 0.00 | JAVA0015 Package class contains public nested type | |
| JAVA0016 | 0.00 | JAVA0016 Abstract class contains public constructor | |
| JAVA0017 | 0.00 | JAVA0017 Class name does not have required form | |
| JAVA0018 | 0.00 | JAVA0018 Method name does not have required form | |
| JAVA0019 | 0.00 | JAVA0019 Interface name does not have required form | |
| JAVA0020 | 0.00 | JAVA0020 Field name does not have required form | |
| JAVA0021 | 0.00 | JAVA0021 Interface method name does not have required form | |
| JAVA0022 | 0.00 | JAVA0022 Static final field name does not have required form | |
| JAVA0023 | 0.00 | JAVA0023 Empty finalize method | |
| JAVA0024 | 0.00 | JAVA0024 Empty class | |
| JAVA0025 | 0.00 | JAVA0025 Method override is empty | |
| JAVA0026 | 0.00 | JAVA0026 Finalize method with parameters | |
| JAVA0029 | 0.00 | JAVA0029 Private method not used | |
| JAVA0030 | 1.00 | JAVA0030 Private field not used | |
| JAVA0031 | 0.00 | JAVA0031 Case statement not properly closed | |
| JAVA0032 | 0.00 | JAVA0032 Switch statement missing default | |
| JAVA0033 | 0.00 | JAVA0033 default: not last case in switch statement | |
| JAVA0034 | 0.00 | JAVA0034 Missing braces in if statement | |
| JAVA0035 | 0.00 | JAVA0035 Missing braces in for statement | |
| JAVA0036 | 0.00 | JAVA0036 Missing braces in while statement | |
| JAVA0038 | 0.00 | JAVA0038 Non-case label in switch statement | |
| JAVA0039 | 0.00 | JAVA0039 Break statement with label | |
| JAVA0040 | 0.00 | JAVA0040 Switch statement contains N cases (maximum: M) | |
| JAVA0041 | 0.00 | JAVA0041 Nested synchronized block | |
| JAVA0042 | 0.00 | JAVA0042 Empty synchronized statement | |
| JAVA0043 | 0.00 | JAVA0043 Inner class does not use outer class | |
| JAVA0044 | 0.00 | JAVA0044 Serializable class with no instance variables | |
| JAVA0045 | 0.00 | JAVA0045 Serializable class with only transient fields | |
| JAVA0046 | 0.00 | JAVA0046 Name of class not derived from Exception ends with 'Exception' | |
| JAVA0047 | 0.00 | JAVA0047 Serializable class derives from invalid base class | |
| JAVA0048 | 0.00 | JAVA0048 Name of class derived from Exception does not end with 'Exception' | |
| JAVA0049 | 3.00 | JAVA0049 Nested block at depth N (maximum: M) | |
| JAVA0050 | 0.00 | JAVA0050 Class derives from java.lang.Error | |
| JAVA0051 | 0.00 | JAVA0051 Class derives from java.lang.RuntimeException | |
| JAVA0052 | 0.00 | JAVA0052 Class derives from java.lang.Throwable | |
| JAVA0053 | 0.00 | JAVA0053 Unused label | |
| JAVA0054 | 1.00 | JAVA0054 Inheritance depth N exceeds maximum M | |
| JAVA0055 | 0.00 | JAVA0055 Class should be interface | |
| JAVA0056 | 0.00 | JAVA0056 Unnecessary abstract modifier for interface or annotation | |
| JAVA0057 | 0.00 | JAVA0057 Unnecessary default constructor | |
| JAVA0058 | 0.00 | JAVA0058 Constructor calls super() | |
| JAVA0059 | 0.00 | JAVA0059 Method override only calls super() | |
| JAVA0061 | 0.00 | JAVA0061 Inaccessible member in anonymous class | |
| JAVA0062 | 0.00 | JAVA0062 Public class missing public member or protected constructor | |
| JAVA0063 | 0.00 | JAVA0063 Identifier name should not contain '$' | |
| JAVA0064 | 0.00 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0065 | 0.00 | JAVA0065 Unnecessary final modifier for method in final class | |
| JAVA0066 | 0.00 | JAVA0066 Unnecessary modifier for interface nested type | |
| JAVA0067 | 0.00 | JAVA0067 Array descriptor on identifier name | |
| JAVA0068 | 0.00 | JAVA0068 Modifiers not declared in recommended order | |
| JAVA0071 | 0.00 | JAVA0071 Strings compared with == | |
| JAVA0073 | 0.00 | JAVA0073 Integer division in floating-point context | |
| JAVA0074 | 1.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 0.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 1.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 0.00 | JAVA0078 Floating point values compared with == | |
| JAVA0079 | 0.00 | JAVA0079 Use of instance to reference static member | |
| JAVA0080 | 3.00 | JAVA0080 Import declaration not used | |
| JAVA0081 | 0.00 | JAVA0081 Boolean literal in comparison | |
| JAVA0082 | 0.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 0.00 | JAVA0083 Unnecessary instanceof test | |
| JAVA0084 | 0.00 | JAVA0084 Should use compound assignment operator | |
| JAVA0085 | 0.00 | JAVA0085 Use of sun.* class | |
| JAVA0087 | 0.00 | JAVA0087 Use of Thread.sleep() | |
| JAVA0089 | 0.00 | JAVA0089 Use of restricted package | |
| JAVA0092 | 0.00 | JAVA0092 Use of restricted type | |
| JAVA0093 | 0.00 | JAVA0093 Redundant assignment | |
| JAVA0094 | 0.00 | JAVA0094 Field hides a superclass field | |
| JAVA0095 | 0.00 | JAVA0095 Uninitialized private field | |
| JAVA0096 | 0.00 | JAVA0096 Field in nested class hides outer field | |
| JAVA0098 | 0.00 | JAVA0098 Minimize use of implicit field initializers | |
| JAVA0100 | 1.00 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0101 | 0.00 | JAVA0101 Unnecessary modifier for field in interface | |
| JAVA0102 | 0.00 | JAVA0102 Last statement in finalize() not super.finalize() | |
| JAVA0103 | 0.00 | JAVA0103 Explicit call to finalize() | |
| JAVA0104 | 0.00 | JAVA0104 finalize() only calls super.finalize() | |
| JAVA0105 | 0.00 | JAVA0105 Duplicate import declaration | |
| JAVA0106 | 0.00 | JAVA0106 Unnecessary import from current package | |
| JAVA0108 | 4.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 2.00 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0111 | 0.00 | JAVA0111 Incorrect javadoc: @return tag for void method | |
| JAVA0112 | 0.00 | JAVA0112 Incorrect javadoc: no exception 'exception' in throws | |
| JAVA0113 | 1.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 1.00 | JAVA0114 Incorrect javadoc: no @version tag | |
| JAVA0115 | 0.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 1.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 11.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 0.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 0.00 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0123 | 0.00 | JAVA0123 Use all three components of for loop | |
| JAVA0125 | 0.00 | JAVA0125 Continue statement with label | |
| JAVA0126 | 0.00 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0128 | 0.00 | JAVA0128 Public constructor in non-public class | |
| JAVA0130 | 1.00 | JAVA0130 Non-static method does not use instance fields | |
| JAVA0131 | 0.00 | JAVA0131 Compatible method does not override base | |
| JAVA0132 | 0.00 | JAVA0132 Method overload with compatible signature | |
| JAVA0133 | 0.00 | JAVA0133 Non-synchronized method overrides synchronized method | |
| JAVA0135 | 1.00 | JAVA0135 Only one of Object.equals and Object.hashCode defined: missing 'method' | |
| JAVA0136 | 1.00 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0137 | 0.00 | JAVA0137 Non-abstract class missing constructor | |
| JAVA0138 | 0.00 | JAVA0138 N parameters defined for method (maximum: M) | |
| JAVA0139 | 0.00 | JAVA0139 Definition of main other than public static void main(java.lang.String[]) | |
| JAVA0141 | 0.00 | JAVA0141 Unnecessary modifier for method in interface | |
| JAVA0143 | 0.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 0.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 833.00 | JAVA0145 Tab character used in source file | |
| JAVA0150 | 0.00 | JAVA0150 java.lang.Error (or subclass) thrown | |
| JAVA0153 | 0.00 | JAVA0153 Inefficient conversion of integer to string | |
| JAVA0159 | 0.00 | JAVA0159 Inefficient conversion of string to integer | |
| JAVA0160 | 0.00 | JAVA0160 Method does not throw specified exception | |
| JAVA0161 | 0.00 | JAVA0161 Conditional wait() not in loop | |
| JAVA0163 | 0.00 | JAVA0163 Empty statement | |
| JAVA0165 | 0.00 | JAVA0165 Conflicting return statement in finally block | |
| JAVA0166 | 0.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 0.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 0.00 | JAVA0173 Unused method parameter | |
| JAVA0174 | 0.00 | JAVA0174 Assigned local variable never used | |
| JAVA0175 | 1.00 | JAVA0175 Successive assignment to variable | |
| JAVA0176 | 0.00 | JAVA0176 Local variable name does not have required form | |
| JAVA0177 | 1.00 | JAVA0177 Variable declaration missing initializer | |
| JAVA0179 | 1.00 | JAVA0179 Local variable hides visible field | |
| JAVA0233 | 0.00 | JAVA0233 Definition of serialVersionUID other than 'private static final long serialVersionUID' | |
| JAVA0234 | 0.00 | JAVA0234 Class is Serializable but does not define serialVersionUID | |
| JAVA0235 | 0.00 | JAVA0235 Class defines serialVersionUID but does not implement Serializable | |
| JAVA0236 | 0.00 | JAVA0236 Attempt to clone an object which does not implement Cloneable | |
| JAVA0237 | 0.00 | JAVA0237 Class implements Cloneable but does not have public clone method | |
| JAVA0238 | 0.00 | JAVA0238 Clone method does not call super.clone() | |
| JAVA0239 | 0.00 | JAVA0239 Class declares 'readObject' or 'writeObject' but does not implement Serializable | |
| JAVA0240 | 0.00 | JAVA0240 Serializable class which declares readObject or writeObject but not both | |
| JAVA0241 | 0.00 | JAVA0241 'readObject' or 'writeObject' should be declared private in Serializable class | |
| JAVA0242 | 0.00 | JAVA0242 Transient field in non-Serializable class | |
| JAVA0243 | 0.00 | JAVA0243 'readResolve' or 'writeReplace' should be declared private or protected | |
| JAVA0244 | 0.00 | JAVA0244 Field or method name in subclass differs only by case from inherited field or method | |
| JAVA0245 | 0.00 | JAVA0245 JUnit TestCase with non-trivial constructor | |
| JAVA0246 | 0.00 | JAVA0246 JUnit assertXXX statement missing message parameter | |
| JAVA0247 | 0.00 | JAVA0247 JUnit 'setUp()' and 'tearDown()' should call super method | |
| JAVA0248 | 0.00 | JAVA0248 JUnit method 'setUp' or 'tearDown' with incorrect signature | |
| JAVA0249 | 0.00 | JAVA0249 JUnit TestCase 'suite()' should be declared static | |
| JAVA0250 | 0.00 | JAVA0250 JUnit TestCase declares testXXX method with incorrect signature | |
| JAVA0251 | 0.00 | JAVA0251 Use '%n' for line breaks in printf/format for platform independence | |
| JAVA0252 | 0.00 | JAVA0252 'enum' is a Java 1.5 reserved word | |
| JAVA0253 | 0.00 | JAVA0253 Not all enum constants consumed in switch statement | |
| JAVA0254 | 4.00 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0255 | 0.00 | JAVA0255 Result of method invocation not used | |
| JAVA0256 | 0.00 | JAVA0256 Assignment of external collection/array to field | |
| JAVA0257 | 0.00 | JAVA0257 Use of 'Constant Interface' anti-pattern | |
| JAVA0258 | 0.00 | JAVA0258 Implement Iterable for foreach compatibility | |
| JAVA0259 | 0.00 | JAVA0259 Return of collection/array field | |
| JAVA0260 | 0.00 | JAVA0260 Use 'enum' instead of Enumerated Type pattern | |
| JAVA0261 | 0.00 | JAVA0261 Use specialized Enum collection types | |
| JAVA0262 | 0.00 | JAVA0262 Use of char in integer context | |
| JAVA0263 | 0.00 | JAVA0263 Long literal ends with 'l' instead of 'L' | |
| JAVA0264 | 1.00 | JAVA0264 Integer math in long context - check for overflow | |
| JAVA0265 | 0.00 | JAVA0265 Use of Throwable.printStackTrace() | |
| JAVA0266 | 0.00 | JAVA0266 Use of System.out | |
| JAVA0267 | 0.00 | JAVA0267 Use of System.err | |
| JAVA0269 | 0.00 | JAVA0269 Contents of StringBuffer never used | |
| JAVA0270 | 0.00 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0271 | 0.00 | JAVA0271 Minimize use of on-demand (.*) static imports | |
| JAVA0272 | 0.00 | JAVA0272 Thread.run() called | |
| JAVA0273 | 0.00 | JAVA0273 Non-final derivative of Thread calls start() in constructor | |
| JAVA0274 | 0.00 | JAVA0274 Serializable class has a synchronized readObject() | |
| JAVA0275 | 0.00 | JAVA0275 Serializable class has a synchronized writeObject() and no other synchronized methods | |
| JAVA0276 | 0.00 | JAVA0276 Unnecessary use of String constructor | |
| JAVA0277 | 0.00 | JAVA0277 Iterator.next() implementation does not throw NoSuchElementException | |
| JAVA0278 | 0.00 | JAVA0278 Unnecessary use of Boolean constructor | |
| JAVA0279 | 0.00 | JAVA0279 Serialization method readObject or readObjectNoData calls an overridable method | |
| JAVA0280 | 0.00 | JAVA0280 IllegalMonitorStateException caught | |
| JAVA0281 | 0.00 | JAVA0281 Iterator.next() not called in loop | |
| JAVA0282 | 0.00 | JAVA0282 Call to Iterator.next() in loop which does not test Iterator.hasNext() | |
| JAVA0283 | 0.00 | JAVA0283 Control variable not updated in loop body | |
| JAVA0284 | 0.00 | JAVA0284 Explicit garbage collection | |
| JAVA0285 | 0.00 | JAVA0285 Dereference of potentially null variable | |
| JAVA0286 | 0.00 | JAVA0286 Dereference of null variable | |
| JAVA0287 | 0.00 | JAVA0287 Unnecessary null check | |
| JAVA0288 | 0.00 | JAVA0288 Inconsistent null check | |
| LINES | 807.00 | Number of lines in the source file | |
| LINE_COMMENT | 26.00 | Number of line comments | |
| LOC | 592.00 | Lines of code | |
| LOGICAL_LINES | 229.00 | Number of statements | |
| LOOPS | 10.00 | Number of loops | |
| NEST_DEPTH | 6.00 | Maximum nesting depth | |
| OPERANDS | 937.00 | Number of operands | |
| OPERATORS | 2189.00 | Number of operators | |
| PARAMS | 16.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 3126.00 | Halstead program length | |
| PROGRAM_VOCAB | 380.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 49.00 | Number of return points from functions | |
| SIZE | 17703.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 320.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 60.00 | Number of unique operators | |
| WHITESPACE | 106.00 | Number of whitespace lines | |