AddressTracker.java
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freenet.io |
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Freenet |
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 | |
|---|---|---|
| JAVA0034 | JAVA0034 Missing braces in if statement |  |
| JAVA0143 | JAVA0143 Synchronized method | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0035 | JAVA0035 Missing braces in for statement | |
| JAVA0264 | JAVA0264 Integer math in long context - check for overflow | |
| JAVA0116 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0068 | JAVA0068 Modifiers not declared in recommended order | |
| UNIQUE_OPERATORS | Number of unique operators | |
| LOGICAL_LINES | Number of statements | |
| PROGRAM_VOLUME | Halstead program volume | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| EXITS | Procedure exits | |
| UNIQUE_OPERANDS | Number of unique operands | |
| WHITESPACE | Number of whitespace lines | |
| DOC_COMMENT | Number of javadoc comment lines | |
| COMMENTS | Comment lines | |
| JAVA0270 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
/* Copyright 2007 Freenet Project Inc.
* 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 freenet.io;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.InetAddress;
import java.util.HashMap;
import java.util.Iterator;
import freenet.io.comm.Peer;
import freenet.node.FSParseException;
import freenet.support.Logger;
import freenet.support.SimpleFieldSet;
/**
* Track packet traffic to/from specific peers and IP addresses, in order to
* determine whether we are open to the internet.
*
* Normally there would be one tracker per port i.e. per UdpSocketHandler.
* @author toad
*/
public class AddressTracker {
/** PeerAddressTrackerItem's by Peer */
private final HashMap peerTrackers;
/** InetAddressAddressTrackerItem's by InetAddress */
private final HashMap ipTrackers;
/** Maximum number of Item's of either type */
static final int MAX_ITEMS = 1000;
private long timeDefinitelyNoPacketsReceived;
private long timeDefinitelyNoPacketsSent;
private boolean isBroken;
public static AddressTracker create(long lastBootID, File nodeDir, int port) {
File data = new File(nodeDir, "packets-"+port+".dat");
File dataBak = new File(nodeDir, "packets-"+port+".bak");
dataBak.delete();
FileInputStream fis = null;
try {
fis = new FileInputStream(data);
BufferedInputStream bis = new BufferedInputStream(fis);
InputStreamReader ir = new InputStreamReader(bis, "UTF-8");
BufferedReader br = new BufferedReader(ir);
SimpleFieldSet fs = new SimpleFieldSet(br, false, true);
return new AddressTracker(fs, lastBootID);
} catch (IOException e) {
// Fall through
} catch (FSParseException e) {
Logger.error(AddressTracker.class, "Failed to load from disk for port "+port+": "+e, e);
// Fall through
} finally {
if(fis != null)
try {
fis.close();
} catch (IOException e) {
// Ignore
}
}
return new AddressTracker();
}
private AddressTracker() {
timeDefinitelyNoPacketsReceived = System.currentTimeMillis();
timeDefinitelyNoPacketsSent = System.currentTimeMillis();
peerTrackers = new HashMap();
ipTrackers = new HashMap();
}
private AddressTracker(SimpleFieldSet fs, long lastBootID) throws FSParseException {
int version = fs.getInt("Version");
if(version != 1)
throw new FSParseException("Unknown Version "+version);
long savedBootID = fs.getLong("BootID");
if(savedBootID != lastBootID) throw new FSParseException("Wrong boot ID - maybe unclean shutdown? Last was "+lastBootID+" stored "+savedBootID);
// Sadly we don't know whether there were packets arriving during the gap,
// and some insecure firewalls will use incoming packets to keep tunnels open
//timeDefinitelyNoPacketsReceived = fs.getLong("TimeDefinitelyNoPacketsReceived");
timeDefinitelyNoPacketsReceived = System.currentTimeMillis();
timeDefinitelyNoPacketsSent = fs.getLong("TimeDefinitelyNoPacketsSent");
peerTrackers = new HashMap();
SimpleFieldSet peers = fs.getSubset("Peers");
Iterator i = peers.directSubsetNameIterator();
if(i != null) {
while(i.hasNext()) {
SimpleFieldSet peer = peers.subset((String)i.next());
PeerAddressTrackerItem item = new PeerAddressTrackerItem(peer);
peerTrackers.put(item.peer, item);
}
}
ipTrackers = new HashMap();
SimpleFieldSet ips = fs.getSubset("IPs");
i = ips.directSubsetNameIterator();
if(i != null) {
while(i.hasNext()) {
SimpleFieldSet peer = ips.subset((String)i.next());
InetAddressAddressTrackerItem item = new InetAddressAddressTrackerItem(peer);
ipTrackers.put(item.addr, item);
}
}
}
public void sentPacketTo(Peer peer) {
packetTo(peer, true);
}
public void receivedPacketFrom(Peer peer) {
packetTo(peer, false);
}
private void packetTo(Peer peer, boolean sent) {
peer = peer.dropHostName();
InetAddress ip = peer.getAddress();
long now = System.currentTimeMillis();
synchronized(this) {
PeerAddressTrackerItem peerItem = (PeerAddressTrackerItem) peerTrackers.get(peer);
if(peerItem == null) {
peerItem = new PeerAddressTrackerItem(timeDefinitelyNoPacketsReceived, timeDefinitelyNoPacketsSent, peer);
if(peerTrackers.size() > MAX_ITEMS) {
peerTrackers.clear();
ipTrackers.clear();
timeDefinitelyNoPacketsReceived = now;
timeDefinitelyNoPacketsSent = now;
}
peerTrackers.put(peer, peerItem);
}
if(sent)
peerItem.sentPacket(now);
else
peerItem.receivedPacket(now);
InetAddressAddressTrackerItem ipItem = (InetAddressAddressTrackerItem) ipTrackers.get(ip);
if(ipItem == null) {
ipItem = new InetAddressAddressTrackerItem(timeDefinitelyNoPacketsReceived, timeDefinitelyNoPacketsSent, ip);
if(ipTrackers.size() > MAX_ITEMS) {
peerTrackers.clear();
ipTrackers.clear();
timeDefinitelyNoPacketsReceived = now;
timeDefinitelyNoPacketsSent = now;
}
ipTrackers.put(ip, ipItem);
}
if(sent)
ipItem.sentPacket(now);
else
ipItem.receivedPacket(now);
}
}
public synchronized void startReceive(long now) {
timeDefinitelyNoPacketsReceived = now;
}
public synchronized void startSend(long now) {
timeDefinitelyNoPacketsSent = now;
}
public synchronized PeerAddressTrackerItem[] getPeerAddressTrackerItems() {
PeerAddressTrackerItem[] items = new PeerAddressTrackerItem[peerTrackers.size()];
return (PeerAddressTrackerItem[]) peerTrackers.values().toArray(items);
}
public synchronized InetAddressAddressTrackerItem[] getInetAddressTrackerItems() {
InetAddressAddressTrackerItem[] items = new InetAddressAddressTrackerItem[ipTrackers.size()];
return (InetAddressAddressTrackerItem[]) ipTrackers.values().toArray(items);
}
public static final int DEFINITELY_PORT_FORWARDED = 2;
public static final int MAYBE_PORT_FORWARDED = 1;
public static final int DEFINITELY_NATED = -1;
public static final int DONT_KNOW = 0;
/** If the minimum gap is at least this, we might be port forwarded.
* RFC 4787 requires at least 2 minutes, but many NATs have shorter timeouts. */
public final static long MAYBE_TUNNEL_LENGTH = ((5 * 60) + 1) * 1000L;
/** If the minimum gap is at least this, we are almost certainly port forwarded.
* Some stateful firewalls do at least 30 minutes. Hopefully the below is
* sufficiently over the top! */
public final static long DEFINITELY_TUNNEL_LENGTH = (12 * 60 + 1) * 60 * 1000L;
/** Time after which we ignore evidence that we are port forwarded */
public static final long HORIZON = 24*60*60*1000L;
public long getLongestSendReceiveGap() {
return getLongestSendReceiveGap(HORIZON);
}
/**
* Find the longest send/known-no-packets-sent ... receive gap.
* It is highly unlikely that we are behind a NAT or symmetric
* firewall with a timeout less than the returned length.
*/
public long getLongestSendReceiveGap(long horizon) {
long longestGap = -1;
long now = System.currentTimeMillis();
PeerAddressTrackerItem[] items = getPeerAddressTrackerItems();
for(int i=0;i<items.length;i++) {
PeerAddressTrackerItem item = items[i];
if(item.packetsReceived() <= 0) continue;
if(!item.peer.isRealInternetAddress(false, false, false)) continue;
longestGap = Math.max(longestGap, item.longestGap(horizon, now));
}
return longestGap;
}
public int getPortForwardStatus() {
long minGap = getLongestSendReceiveGap(HORIZON);
if(isBroken) return DEFINITELY_NATED;
if(minGap > DEFINITELY_TUNNEL_LENGTH)
return DEFINITELY_PORT_FORWARDED;
if(minGap > MAYBE_TUNNEL_LENGTH)
return MAYBE_PORT_FORWARDED;
return DONT_KNOW;
}
public static String statusString(int status) {
switch(status) {
case DEFINITELY_PORT_FORWARDED:
return "Port forwarded";
case MAYBE_PORT_FORWARDED:
return "Maybe port forwarded";
case DEFINITELY_NATED:
return "Behind NAT";
case DONT_KNOW:
return "Status unknown";
default:
return "Error";
}
}
/** Persist the table to disk */
public void storeData(long bootID, File nodeDir, int port) {
// Don't write to disk if we know we're NATed anyway!
if(isBroken) return;
File data = new File(nodeDir, "packets-"+port+".dat");
File dataBak = new File(nodeDir, "packets-"+port+".bak");
data.delete();
dataBak.delete();
FileOutputStream fos = null;
try {
fos = new FileOutputStream(dataBak);
BufferedOutputStream bos = new BufferedOutputStream(fos);
OutputStreamWriter osw = new OutputStreamWriter(bos, "UTF-8");
BufferedWriter bw = new BufferedWriter(osw);
SimpleFieldSet fs = getFieldset(bootID);
fs.writeTo(bw);
bw.flush();
bw.close();
fos = null;
dataBak.renameTo(data);
} catch (IOException e) {
Logger.error(this, "Cannot store packet tracker to disk");
return;
} finally {
if(fos != null)
try {
fos.close();
} catch (IOException e) {
// Ignore
}
}
}
private synchronized SimpleFieldSet getFieldset(long bootID) {
SimpleFieldSet sfs = new SimpleFieldSet(true);
sfs.put("Version", 1);
sfs.put("BootID", bootID);
sfs.put("TimeDefinitelyNoPacketsReceived", timeDefinitelyNoPacketsReceived);
sfs.put("TimeDefinitelyNoPacketsSent", timeDefinitelyNoPacketsSent);
PeerAddressTrackerItem[] peerItems = getPeerAddressTrackerItems();
SimpleFieldSet items = new SimpleFieldSet(true);
if(peerItems.length > 0) {
for(int i = 0; i < peerItems.length; i++)
items.put(Integer.toString(i), peerItems[i].toFieldSet());
sfs.put("Peers", items);
}
InetAddressAddressTrackerItem[] inetItems = getInetAddressTrackerItems();
items = new SimpleFieldSet(true);
if(inetItems.length > 0) {
for(int i = 0; i < inetItems.length; i++)
items.put(Integer.toString(i), inetItems[i].toFieldSet());
sfs.put("IPs", items);
}
return sfs;
}
/** Called when something changes at a higher level suggesting that the status may be wrong */
public void rescan() {
// Do nothing for now, as we don't maintain any final state yet.
}
public synchronized void setBroken() {
isBroken = true;
}
}
The table below shows all metrics for AddressTracker.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 41.00 | Number of blocks | |
| BLOCK_COMMENT | 15.00 | Number of block comment lines | |
| COMMENTS | 47.00 | Comment lines | |
| COMMENT_DENSITY | 0.23 | Comment density | |
| COMPARISONS | 21.00 | Number of comparison operators | |
| CYCLOMATIC | 53.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 11.00 | Comments in declarations | |
| DOC_COMMENT | 23.00 | Number of javadoc comment lines | |
| ELOC | 207.00 | Effective lines of code | |
| EXEC_COMMENTS | 7.00 | Comments in executable code | |
| EXITS | 42.00 | Procedure exits | |
| FUNCTIONS | 18.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 76.95 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 52.00 | 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 | 0.00 | JAVA0005 Imports not in specified order | |
| JAVA0006 | 0.00 | JAVA0006 Empty finally block | |
| JAVA0007 | 0.00 | JAVA0007 Should not declare public field | |
| JAVA0008 | 0.00 | 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 | 0.00 | 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 | 14.00 | JAVA0034 Missing braces in if statement | |
| JAVA0035 | 2.00 | 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 | 0.00 | 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 | 0.00 | 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 | 1.00 | 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 | 2.00 | 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 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 0.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 0.00 | 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 | 0.00 | 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 | 0.00 | 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 | 1.00 | 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 | 0.00 | 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 | 4.00 | 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 | 0.00 | 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 | 0.00 | JAVA0135 Only one of Object.equals and Object.hashCode defined: missing 'method' | |
| JAVA0136 | 0.00 | 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 | 6.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 1.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 578.00 | 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 | 0.00 | JAVA0175 Successive assignment to variable | |
| JAVA0176 | 0.00 | JAVA0176 Local variable name does not have required form | |
| JAVA0177 | 0.00 | JAVA0177 Variable declaration missing initializer | |
| JAVA0179 | 0.00 | 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 | 0.00 | 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 | 2.00 | 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 | 1.00 | 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 | 319.00 | Number of lines in the source file | |
| LINE_COMMENT | 9.00 | Number of line comments | |
| LOC | 243.00 | Lines of code | |
| LOGICAL_LINES | 154.00 | Number of statements | |
| LOOPS | 5.00 | Number of loops | |
| NEST_DEPTH | 4.00 | Maximum nesting depth | |
| OPERANDS | 589.00 | Number of operands | |
| OPERATORS | 1116.00 | Number of operators | |
| PARAMS | 17.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 1705.00 | Halstead program length | |
| PROGRAM_VOCAB | 251.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 35.00 | Number of return points from functions | |
| SIZE | 10940.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 199.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 52.00 | Number of unique operators | |
| WHITESPACE | 29.00 | Number of whitespace lines | |