Filter.java
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net.sf.ehcache.constructs.web.filter |
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ehcache |
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 | |
|---|---|---|
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' |  |
| JAVA0115 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| DOC_COMMENT | Number of javadoc comment lines | |
| DECL_COMMENTS | Comments in declarations | |
| JAVA0166 | JAVA0166 Generic exception caught | |
| EXITS | Procedure exits | |
| JAVA0075 | JAVA0075 Method parameter hides field | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| PROGRAM_VOLUME | Halstead program volume | |
| SIZE | Size of the file in bytes | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| LINE_COMMENT | Number of line comments | |
| EXEC_COMMENTS | Comments in executable code | |
| COMMENTS | Comment lines | |
| WHITESPACE | Number of whitespace lines | |
| JAVA0130 | JAVA0130 Non-static method does not use instance fields | |
| LOOPS | Number of loops | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
| UNIQUE_OPERATORS | Number of unique operators | |
/**
* Copyright 2003-2008 Luck Consulting Pty Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.sf.ehcache.constructs.web.filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* A generic {@link javax.servlet.Filter} with most of what we need done.
* <p/>
* Participates in the Template Method pattern with {@link javax.servlet.Filter}.
*
* @author <a href="mailto:gluck@thoughtworks.com">Greg Luck</a>
* @version $Id: Filter.java 746 2008-08-18 08:08:02Z gregluck $
*/
public abstract class Filter implements javax.servlet.Filter {
/**
* If a request attribute NO_FILTER is set, then filtering will be skipped
*/
public static final String NO_FILTER = "NO_FILTER";
private static final Logger LOG = Logger.getLogger(Filter.class.getName());
/**
* The filter configuration.
*/
protected FilterConfig filterConfig;
/**
* The exceptions to log differently, as a comma separated list
*/
protected String exceptionsToLogDifferently;
/**
* A the level of the exceptions which will be logged differently.
* <p/>
* This should match the logging method name in Java logging e.g. fine
*/
protected Level exceptionsToLogDifferentlyLevel;
/**
* Most {@link Throwable}s in Web applications propagate to the user. Usually they are logged where they first
* happened. Printing the stack trace once a {@link Throwable} as propagated to the servlet is sometimes
* just clutters the log.
* <p/>
* This field corresponds to an init-param of the same name. If set to true stack traces will be suppressed.
*/
protected boolean suppressStackTraces;
/**
* Performs the filtering. This method calls template method
* {@link #doFilter(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse,javax.servlet.FilterChain) } which does the filtering.
* This method takes care of error reporting and handling.
* Errors are reported at warn level because http tends to produce lots of errors.
*
* @throws IOException if an IOException occurs during this method it will be rethrown and will not be wrapped
*/
public final void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain)
throws ServletException, IOException {
final HttpServletRequest httpRequest = (HttpServletRequest) request;
final HttpServletResponse httpResponse = (HttpServletResponse) response;
try {
//NO_FILTER set for RequestDispatcher forwards to avoid double gzipping
if (filterNotDisabled(httpRequest)) {
doFilter(httpRequest, httpResponse, chain);
} else {
chain.doFilter(request, response);
}
} catch (final Throwable throwable) {
logThrowable(throwable, httpRequest);
}
}
/**
* Filters can be disabled programmatically by adding a {@link #NO_FILTER} parameter to the request.
* This parameter is normally added to make RequestDispatcher include and forwards work.
*
* @param httpRequest the request
* @return true if NO_FILTER is not set.
*/
protected boolean filterNotDisabled(final HttpServletRequest httpRequest) {
return httpRequest.getAttribute(NO_FILTER) == null;
}
/**
* This method should throw IOExceptions, not wrap them.
*/
private void logThrowable(final Throwable throwable, final HttpServletRequest httpRequest)
throws ServletException, IOException {
StringBuffer messageBuffer = new StringBuffer("Throwable thrown during doFilter on request with URI: ")
.append(httpRequest.getRequestURI())
.append(" and Query: ")
.append(httpRequest.getQueryString());
String message = messageBuffer.toString();
boolean matchFound = matches(throwable);
if (matchFound) {
try {
if (suppressStackTraces) {
LOG.log(exceptionsToLogDifferentlyLevel, throwable.getMessage());
} else {
LOG.log(exceptionsToLogDifferentlyLevel, throwable.getMessage(), throwable);
}
} catch (Exception e) {
LOG.log(Level.SEVERE, "Could not invoke Log method for " + exceptionsToLogDifferentlyLevel, e);
}
if (throwable instanceof IOException) {
throw (IOException) throwable;
} else {
throw new ServletException(message, throwable);
}
} else {
if (suppressStackTraces) {
LOG.log(Level.WARNING, messageBuffer.append(throwable.getMessage()).append("\nTop StackTraceElement: ")
.append(throwable.getStackTrace()[0].toString()).toString());
} else {
LOG.log(Level.WARNING, messageBuffer.append(throwable.getMessage()).toString(), throwable);
}
if (throwable instanceof IOException) {
throw (IOException) throwable;
} else {
throw new ServletException(throwable);
}
}
}
/**
* Checks whether a throwable, its root cause if it is a {@link ServletException}, or its cause, if it is a
* Chained Exception matches an entry in the exceptionsToLogDifferently list
*
* @param throwable
* @return true if the class name of any of the throwables is found in the exceptions to log differently
*/
private boolean matches(Throwable throwable) {
if (exceptionsToLogDifferently == null) {
return false;
}
if (exceptionsToLogDifferently.indexOf(throwable.getClass().getName()) != -1) {
return true;
}
if (throwable instanceof ServletException) {
Throwable rootCause = (((ServletException) throwable).getRootCause());
if (exceptionsToLogDifferently.indexOf(rootCause.getClass().getName()) != -1) {
return true;
}
}
if (throwable.getCause() != null) {
Throwable cause = throwable.getCause();
if (exceptionsToLogDifferently.indexOf(cause.getClass().getName()) != -1) {
return true;
}
}
return false;
}
/**
* Initialises the filter.
* <p/>
* Calls template method {@link #doInit(javax.servlet.FilterConfig)} to perform any filter specific initialisation.
*/
public final void init(final FilterConfig filterConfig) throws ServletException {
try {
this.filterConfig = filterConfig;
processInitParams(filterConfig);
// Attempt to initialise this filter
doInit(filterConfig);
} catch (final Exception e) {
LOG.log(Level.SEVERE, "Could not initialise servlet filter.", e);
throw new ServletException("Could not initialise servlet filter.", e);
}
}
/**
* Processes initialisation parameters. These are configured in web.xml in accordance with the
* Servlet specification using the following syntax:
* <pre>
* <filter>
* ...
* <init-param>
* <param-name>blah</param-name>
* <param-value>blahvalue</param-value>
* </init-param>
* ...
* </filter>
* </pre>
* @throws ServletException
*/
protected void processInitParams(final FilterConfig config) throws ServletException {
String exceptions = config.getInitParameter("exceptionsToLogDifferently");
String level = config.getInitParameter("exceptionsToLogDifferentlyLevel");
String suppressStackTracesString = config.getInitParameter("suppressStackTraces");
suppressStackTraces = Boolean.valueOf(suppressStackTracesString).booleanValue();
if (LOG.isLoggable(Level.FINE)) {
LOG.fine("Suppression of stack traces enabled for " + this.getClass().getName());
}
if (exceptions != null) {
validateMandatoryParameters(exceptions, level);
setLevel(level);
exceptionsToLogDifferently = exceptions;
if (LOG.isLoggable(Level.FINE)) {
LOG.fine("Different logging levels configured for " + this.getClass().getName());
}
}
}
private void validateMandatoryParameters(String exceptions, String level) throws ServletException {
if ((exceptions != null && level == null) || (level != null && exceptions == null)) {
throw new ServletException("Invalid init-params. Both exceptionsToLogDifferently"
+ " and exceptionsToLogDifferentlyLevelvalue should be specified if one is"
+ " specified.");
}
}
private void setLevel(String level) throws ServletException {
//Check correct level set
if (level.equals("finest")) {
exceptionsToLogDifferentlyLevel = Level.FINEST;
} else if (level.equals("fine")) {
exceptionsToLogDifferentlyLevel = Level.FINE;
} else if (level.equals("info")) {
exceptionsToLogDifferentlyLevel = Level.INFO;
} else if (level.equals("warning")) {
exceptionsToLogDifferentlyLevel = Level.WARNING;
} else if (level.equals("severe")) {
exceptionsToLogDifferentlyLevel = Level.SEVERE;
} else {
throw new ServletException("Invalid init-params value for \"exceptionsToLogDifferentlyLevel\"."
+ "Must be one of finest, fine, info, warning or severe.");
}
}
/**
* Destroys the filter. Calls template method {@link #doDestroy()} to perform any filter specific
* destruction tasks.
*/
public final void destroy() {
this.filterConfig = null;
doDestroy();
}
/**
* Checks if request accepts the named encoding.
*/
protected boolean acceptsEncoding(final HttpServletRequest request, final String name) {
final boolean accepts = headerContains(request, "Accept-Encoding", name);
return accepts;
}
/**
* Checks if request contains the header value.
*/
private boolean headerContains(final HttpServletRequest request, final String header, final String value) {
logRequestHeaders(request);
final Enumeration accepted = request.getHeaders(header);
while (accepted.hasMoreElements()) {
final String headerValue = (String) accepted.nextElement();
if (headerValue.indexOf(value) != -1) {
return true;
}
}
return false;
}
/**
* Logs the request headers, if debug is enabled.
*
* @param request
*/
protected void logRequestHeaders(final HttpServletRequest request) {
if (LOG.isLoggable(Level.FINE)) {
Map headers = new HashMap();
Enumeration enumeration = request.getHeaderNames();
StringBuffer logLine = new StringBuffer();
logLine.append("Request Headers");
while (enumeration.hasMoreElements()) {
String name = (String) enumeration.nextElement();
String headerValue = request.getHeader(name);
headers.put(name, headerValue);
logLine.append(": ").append(name).append(" -> ").append(headerValue);
}
LOG.fine(logLine.toString());
}
}
/**
* A template method that performs any Filter specific destruction tasks.
* Called from {@link #destroy()}
*/
protected abstract void doDestroy();
/**
* A template method that performs the filtering for a request.
* Called from {@link #doFilter(ServletRequest,ServletResponse,FilterChain)}.
*/
protected abstract void doFilter(final HttpServletRequest httpRequest, final HttpServletResponse httpResponse,
final FilterChain chain) throws Throwable;
/**
* A template method that performs any Filter specific initialisation tasks.
* Called from {@link #init(FilterConfig)}.
* @param filterConfig
*/
protected abstract void doInit(FilterConfig filterConfig) throws Exception;
/**
* Returns the filter config.
*/
public FilterConfig getFilterConfig() {
return filterConfig;
}
/**
* Determine whether the user agent accepts GZIP encoding. This feature is part of HTTP1.1.
* If a browser accepts GZIP encoding it will advertise this by including in its HTTP header:
* <p/>
* <code>
* Accept-Encoding: gzip
* </code>
* <p/>
* Requests which do not accept GZIP encoding fall into the following categories:
* <ul>
* <li>Old browsers, notably IE 5 on Macintosh.
* <li>Search robots such as yahoo. While there are quite a few bots, they only hit individual
* pages once or twice a day. Note that Googlebot as of August 2004 now accepts GZIP.
* <li>Internet Explorer through a proxy. By default HTTP1.1 is enabled but disabled when going
* through a proxy. 90% of non gzip requests are caused by this.
* <li>Site monitoring tools
* </ul>
* As of September 2004, about 34% of requests coming from the Internet did not accept GZIP encoding.
*
* @param request
* @return true, if the User Agent request accepts GZIP encoding
*/
protected boolean acceptsGzipEncoding(HttpServletRequest request) {
return acceptsEncoding(request, "gzip");
}
}
The table below shows all metrics for Filter.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 52.00 | Number of blocks | |
| BLOCK_COMMENT | 0.00 | Number of block comment lines | |
| COMMENTS | 145.00 | Comment lines | |
| COMMENT_DENSITY | 0.95 | Comment density | |
| COMPARISONS | 25.00 | Number of comparison operators | |
| CYCLOMATIC | 45.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 22.00 | Comments in declarations | |
| DOC_COMMENT | 142.00 | Number of javadoc comment lines | |
| ELOC | 152.00 | Effective lines of code | |
| EXEC_COMMENTS | 3.00 | Comments in executable code | |
| EXITS | 50.00 | Procedure exits | |
| FUNCTIONS | 17.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 55.76 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 50.00 | Interface complexity | |
| JAVA0001 | 0.00 | JAVA0001 Package name does not contain only lower case letters | |
| JAVA0002 | 0.00 | 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 | 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 | 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 | 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 | 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 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 2.00 | 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 | 1.00 | 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 | 11.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 3.00 | 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 | 0.00 | JAVA0114 Incorrect javadoc: no @version tag | |
| JAVA0115 | 6.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 0.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 0.00 | 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 | 1.00 | 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 | 0.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 1.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 0.00 | 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 | 3.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 1.00 | 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 | 0.00 | 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 | 373.00 | Number of lines in the source file | |
| LINE_COMMENT | 3.00 | Number of line comments | |
| LOC | 191.00 | Lines of code | |
| LOGICAL_LINES | 89.00 | Number of statements | |
| LOOPS | 2.00 | Number of loops | |
| NEST_DEPTH | 4.00 | Maximum nesting depth | |
| OPERANDS | 462.00 | Number of operands | |
| OPERATORS | 906.00 | Number of operators | |
| PARAMS | 23.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 1368.00 | Halstead program length | |
| PROGRAM_VOCAB | 216.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 27.00 | Number of return points from functions | |
| SIZE | 14621.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 174.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 42.00 | Number of unique operators | |
| WHITESPACE | 37.00 | Number of whitespace lines | |