ScopeInterceptor.java
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|---|---|---|
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org.apache.struts2.interceptor |
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Struts 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 | |
|---|---|---|
| JAVA0270 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array |  |
| DOC_COMMENT | Number of javadoc comment lines | |
| JAVA0144 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0179 | JAVA0179 Local variable hides visible field | |
| JAVA0173 | JAVA0173 Unused method parameter | |
| JAVA0163 | JAVA0163 Empty statement | |
| COMMENTS | Comment lines | |
| COMPARISONS | Number of comparison operators | |
| UNIQUE_OPERATORS | Number of unique operators | |
| SIZE | Size of the file in bytes | |
| BLOCKS | Number of blocks | |
| NEST_DEPTH | Maximum nesting depth | |
| PROGRAM_VOLUME | Halstead program volume | |
| CYCLOMATIC | Cyclomatic complexity | |
| JAVA0160 | JAVA0160 Method does not throw specified exception | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| EXEC_COMMENTS | Comments in executable code | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| LINE_COMMENT | Number of line comments | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0044 | JAVA0044 Serializable class with no instance variables | |
| RETURNS | Number of return points from functions | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
/*
* $Id: ScopeInterceptor.java 678526 2008-07-21 18:54:57Z musachy $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.struts2.interceptor;
import java.io.Serializable;
import java.util.IdentityHashMap;
import java.util.Map;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.StrutsException;
import org.apache.struts2.dispatcher.SessionMap;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.ActionProxy;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
import com.opensymphony.xwork2.interceptor.PreResultListener;
import com.opensymphony.xwork2.util.ValueStack;
import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;
/**
* <!-- START SNIPPET: description -->
*
* This is designed to solve a few simple issues related to wizard-like functionality in Struts. One of those issues is
* that some applications have a application-wide parameters commonly used, such <i>pageLen</i> (used for records per
* page). Rather than requiring that each action check if such parameters are supplied, this interceptor can look for
* specified parameters and pull them out of the session.
*
* <p/> This works by setting listed properties at action start with values from session/application attributes keyed
* after the action's class, the action's name, or any supplied key. After action is executed all the listed properties
* are taken back and put in session or application context.
*
* <p/> To make sure that each execution of the action is consistent it makes use of session-level locking. This way it
* guarantees that each action execution is atomic at the session level. It doesn't guarantee application level
* consistency however there has yet to be enough reasons to do so. Application level consistency would also be a big
* performance overkill.
*
* <p/> Note that this interceptor takes a snapshot of action properties just before result is presented (using a {@link
* PreResultListener}), rather than after action is invoked. There is a reason for that: At this moment we know that
* action's state is "complete" as it's values may depend on the rest of the stack and specifically - on the values of
* nested interceptors.
*
* <!-- END SNIPPET: description -->
*
* <p/> <u>Interceptor parameters:</u>
*
* <!-- START SNIPPET: parameters -->
*
* <ul>
*
* <li>session - a list of action properties to be bound to session scope</li>
*
* <li>application - a list of action properties to be bound to application scope</li>
*
* <li>key - a session/application attribute key prefix, can contain following values:</li>
*
* <ul>
*
* <li>CLASS - that creates a unique key prefix based on action namespace and action class, it's a default value</li>
*
* <li>ACTION - creates a unique key prefix based on action namespace and action name</li>
*
* <li>any other value is taken literally as key prefix</li>
*
* </ul>
*
* <li>type - with one of the following</li>
*
* <ul>
*
* <li>start - means it's a start action of the wizard-like action sequence and all session scoped properties are reset
* to their defaults</li>
*
* <li>end - means that session scoped properties are removed from session after action is run</li>
*
* <li>any other value or no value means that it's in-the-middle action that is set with session properties before it's
* executed, and it's properties are put back to session after execution</li>
*
* </ul>
*
* <li>sessionReset - name of a parameter (defaults to 'session.reset') which if set, causes all session values to be reset to action's default values or application
* scope values, note that it is similar to type="start" and in fact it does the same, but in our team it is sometimes
* semantically preferred. We use session scope in two patterns - sometimes there are wizard-like action sequences that
* have start and end, and sometimes we just want simply reset current session values.</li>
*
* <li>reset - boolean, defaults to false, if set, it has the same effect as setting all session values to be reset to action's default values or application.</li>
*
* <li>autoCreateSession - boolean value, sets if the session should be automatically created.</li>
* </ul>
*
* <!-- END SNIPPET: parameters -->
*
* <p/> <u>Extending the interceptor:</u>
*
* <p/>
*
* <!-- START SNIPPET: extending -->
*
* There are no know extension points for this interceptor.
*
* <!-- END SNIPPET: extending -->
*
* <p/> <u>Example code:</u>
*
* <pre>
* <!-- START SNIPPET: example -->
* <!-- As the filter and orderBy parameters are common for all my browse-type actions,
* you can move control to the scope interceptor. In the session parameter you can list
* action properties that are going to be automatically managed over session. You can
* do the same for application-scoped variables-->
* <action name="someAction" class="com.examples.SomeAction">
* <interceptor-ref name="basicStack"/>
* <interceptor-ref name="hibernate"/>
* <interceptor-ref name="scope">
* <param name="session">filter,orderBy</param>
* <param name="autoCreateSession">true</param>
* </interceptor-ref>
* <result name="success">good_result.ftl</result>
* </action>
* <!-- END SNIPPET: example -->
* </pre>
*
*/
public class ScopeInterceptor extends AbstractInterceptor implements PreResultListener {
private static final long serialVersionUID = 9120762699600054395L;
private static final Logger LOG = LoggerFactory.getLogger(ScopeInterceptor.class);
private String[] application = null;
private String[] session = null;
private String key;
private String type = null;
private boolean autoCreateSession = true;
private String sessionReset = "session.reset";
private boolean reset = false;
/**
* Sets a list of application scoped properties
*
* @param s A comma-delimited list
*/
public void setApplication(String s) {
if (s != null) {
application = s.split(" *, *");
}
}
/**
* Sets a list of session scoped properties
*
* @param s A comma-delimited list
*/
public void setSession(String s) {
if (s != null) {
session = s.split(" *, *");
}
}
/**
* Sets if the session should be automatically created
*
* @param value True if it should be created
*/
public void setAutoCreateSession(String value) {
if (value != null && value.length() > 0) {
this.autoCreateSession = Boolean.valueOf(value).booleanValue();
}
}
private String getKey(ActionInvocation invocation) {
ActionProxy proxy = invocation.getProxy();
if (key == null || "CLASS".equals(key)) {
return "struts.ScopeInterceptor:" + proxy.getAction().getClass();
} else if ("ACTION".equals(key)) {
return "struts.ScopeInterceptor:" + proxy.getNamespace() + ":" + proxy.getActionName();
}
return key;
}
/**
* The constructor
*/
public ScopeInterceptor() {
super();
}
// Since 2.0.7. Avoid null references on session serialization (WW-1803).
private static class NULLClass implements Serializable {
public String toString() {
return "NULL";
}
public boolean equals(Object obj) {
return obj == null || (obj instanceof NULLClass);
}
}
private static final Object NULL = new NULLClass();
private static final Object nullConvert(Object o) {
if (o == null) {
return NULL;
}
if (o == NULL || NULL.equals(o)) {
return null;
}
return o;
}
private static Map locks = new IdentityHashMap();
static final void lock(Object o, ActionInvocation invocation) throws Exception {
synchronized (o) {
int count = 3;
Object previous = null;
while ((previous = locks.get(o)) != null) {
if (previous == invocation) {
return;
}
if (count-- <= 0) {
locks.remove(o);
o.notify();
throw new StrutsException("Deadlock in session lock");
}
o.wait(10000);
}
;
locks.put(o, invocation);
}
}
static final void unlock(Object o) {
synchronized (o) {
locks.remove(o);
o.notify();
}
}
protected void after(ActionInvocation invocation, String result) throws Exception {
Map ses = ActionContext.getContext().getSession();
if ( ses != null) {
unlock(ses);
}
}
protected void before(ActionInvocation invocation) throws Exception {
invocation.addPreResultListener(this);
Map ses = ActionContext.getContext().getSession();
if (ses == null && autoCreateSession) {
ses = new SessionMap(ServletActionContext.getRequest());
ActionContext.getContext().setSession(ses);
}
if ( ses != null) {
lock(ses, invocation);
}
String key = getKey(invocation);
Map app = ActionContext.getContext().getApplication();
final ValueStack stack = ActionContext.getContext().getValueStack();
if (LOG.isDebugEnabled()) {
LOG.debug("scope interceptor before");
}
if (application != null)
for (int i = 0; i < application.length; i++) {
String string = application[i];
Object attribute = app.get(key + string);
if (attribute != null) {
if (LOG.isDebugEnabled()) {
LOG.debug("application scoped variable set " + string + " = " + String.valueOf(attribute));
}
stack.setValue(string, nullConvert(attribute));
}
}
if (ActionContext.getContext().getParameters().get(sessionReset) != null) {
return;
}
if (reset) {
return;
}
if (ses == null) {
LOG.debug("No HttpSession created... Cannot set session scoped variables");
return;
}
if (session != null && (!"start".equals(type))) {
for (int i = 0; i < session.length; i++) {
String string = session[i];
Object attribute = ses.get(key + string);
if (attribute != null) {
if (LOG.isDebugEnabled()) {
LOG.debug("session scoped variable set " + string + " = " + String.valueOf(attribute));
}
stack.setValue(string, nullConvert(attribute));
}
}
}
}
public void setKey(String key) {
this.key = key;
}
/* (non-Javadoc)
* @see com.opensymphony.xwork2.interceptor.PreResultListener#beforeResult(com.opensymphony.xwork2.ActionInvocation, java.lang.String)
*/
public void beforeResult(ActionInvocation invocation, String resultCode) {
String key = getKey(invocation);
Map app = ActionContext.getContext().getApplication();
final ValueStack stack = ActionContext.getContext().getValueStack();
if (application != null)
for (int i = 0; i < application.length; i++) {
String string = application[i];
Object value = stack.findValue(string);
if (LOG.isDebugEnabled()) {
LOG.debug("application scoped variable saved " + string + " = " + String.valueOf(value));
}
//if( value != null)
app.put(key + string, nullConvert(value));
}
boolean ends = "end".equals(type);
Map ses = ActionContext.getContext().getSession();
if (ses != null) {
if (session != null) {
for (int i = 0; i < session.length; i++) {
String string = session[i];
if (ends) {
ses.remove(key + string);
} else {
Object value = stack.findValue(string);
if (LOG.isDebugEnabled()) {
LOG.debug("session scoped variable saved " + string + " = " + String.valueOf(value));
}
// Null value should be scoped too
//if( value != null)
ses.put(key + string, nullConvert(value));
}
}
}
unlock(ses);
} else {
LOG.debug("No HttpSession created... Cannot save session scoped variables.");
}
if (LOG.isDebugEnabled()) {
LOG.debug("scope interceptor after (before result)");
}
}
/**
* @return The type of scope operation, "start" or "end"
*/
public String getType() {
return type;
}
/**
* Sets the type of scope operation
*
* @param type Either "start" or "end"
*/
public void setType(String type) {
type = type.toLowerCase();
if ("start".equals(type) || "end".equals(type)) {
this.type = type;
} else {
throw new IllegalArgumentException("Only start or end are allowed arguments for type");
}
}
/**
* @return Gets the session reset parameter name
*/
public String getSessionReset() {
return sessionReset;
}
/**
* @param sessionReset The session reset parameter name
*/
public void setSessionReset(String sessionReset) {
this.sessionReset = sessionReset;
}
/* (non-Javadoc)
* @see com.opensymphony.xwork2.interceptor.Interceptor#intercept(com.opensymphony.xwork2.ActionInvocation)
*/
public String intercept(ActionInvocation invocation) throws Exception {
String result = null;
Map ses = ActionContext.getContext().getSession();
before(invocation);
try {
result = invocation.invoke();
after(invocation, result);
} finally {
if (ses != null) {
unlock(ses);
}
}
return result;
}
/**
* @return True if the scope is reset
*/
public boolean isReset() {
return reset;
}
/**
* @param reset True if the scope should be reset
*/
public void setReset(boolean reset) {
this.reset = reset;
}
}
The table below shows all metrics for ScopeInterceptor.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 62.00 | Number of blocks | |
| BLOCK_COMMENT | 26.00 | Number of block comment lines | |
| COMMENTS | 171.00 | Comment lines | |
| COMMENT_DENSITY | 0.99 | Comment density | |
| COMPARISONS | 47.00 | Number of comparison operators | |
| CYCLOMATIC | 64.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 15.00 | Comments in declarations | |
| DOC_COMMENT | 141.00 | Number of javadoc comment lines | |
| ELOC | 172.00 | Effective lines of code | |
| EXEC_COMMENTS | 2.00 | Comments in executable code | |
| EXITS | 38.00 | Procedure exits | |
| FUNCTIONS | 21.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 78.30 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 55.00 | Interface complexity | |
| JAVA0001 | 1.00 | 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 | 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 | 2.00 | 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 | 1.00 | 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 | 1.00 | 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 | 1.00 | JAVA0057 Unnecessary default constructor | |
| JAVA0058 | 1.00 | 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 | 2.00 | 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 | 0.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 0.00 | 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 | 0.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 3.00 | 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 | 1.00 | 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 | 3.00 | 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 | 1.00 | JAVA0160 Method does not throw specified exception | |
| JAVA0161 | 0.00 | JAVA0161 Conditional wait() not in loop | |
| JAVA0163 | 1.00 | 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 | 2.00 | 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 | 2.00 | JAVA0179 Local variable hides visible field | |
| JAVA0233 | 0.00 | JAVA0233 Definition of serialVersionUID other than 'private static final long serialVersionUID' | |
| JAVA0234 | 1.00 | 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 | 4.00 | 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 | 453.00 | Number of lines in the source file | |
| LINE_COMMENT | 4.00 | Number of line comments | |
| LOC | 231.00 | Lines of code | |
| LOGICAL_LINES | 114.00 | Number of statements | |
| LOOPS | 5.00 | Number of loops | |
| NEST_DEPTH | 6.00 | Maximum nesting depth | |
| OPERANDS | 521.00 | Number of operands | |
| OPERATORS | 1025.00 | Number of operators | |
| PARAMS | 19.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 1546.00 | Halstead program length | |
| PROGRAM_VOCAB | 225.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 36.00 | Number of return points from functions | |
| SIZE | 15647.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 173.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 52.00 | Number of unique operators | |
| WHITESPACE | 51.00 | Number of whitespace lines | |