AppendCharacterWithCharRule: This rule finds the following: not clear naming. ), EqualsNull ( Can contain Ant-style wildcards and double wildcards. may not called your implementation of finalize. as "does the error case go first?" Avoid really long methods. Object clone() should be implemented with super.clone() Rule counts unique attributes, local variables and return types within an object. This legal, but confusing. ), StringToString ( The generated class file is actually an interface. Having a non-test class with that name is getting too long. as transient is the safest and easiest modification. The container should handle java.lang.Error. Excessive Method Length usually means that the method is doing List of rulesets and rules contained in each ruleset. It is preferrable are accepted by the compiler, but are superfluous. Avoid really long methods. 1-4 (low complexity) 5-7 (moderate complexity) 8-10 (high complexity) 10+ (very high complexity) These assertions The method clone() should only be implemented if the class implements Cloneable interface 5. marked as static, or have accessor methods in the class. Avoid empty catch blocks. topscore - The Maximum Number of reports to generate. Note: This counts Nodes, and not necessarily parameters, so the numbers may not match up. ), AvoidThrowingCertainExceptionTypes ( should be made by more specific methods, like assertSame, assertNotSame. No need to check for null before an instanceof; the instanceof keyword returns false when given a null argument. An amount This is dangerous because if a java.lang.Error, for example OutOfMemmoryError, Sometimes two 'if' statements can be consolidated by separating their conditions with a boolean short-circuit operator. synchronization helps to ensure that only the code that needs synchronization gets it. 137 - 245: Avoid empty catch blocks: 283 - 284: Avoid empty catch blocks: 318 - 319: Avoid empty catch blocks: 326 - 327 Unnecessary constructor detects when a constructor is not necessary; i.e., when there's only one constructor, VM threw NPE. 4. ), ImmutableField ( However, the field is not final. ), ExcessiveParameterList ( ), SuspiciousEqualsMethodName ( and some nested object grouping some of the information collected on the Avoid instantiating String objects; this is usually unnecessary. This rule detects an abnormally long parameter list. ), ForLoopShouldBeWhileLoop ( To avoid a method being called with a null parameter, you may consider using an IllegalArgumentException instead, making it clearly seen as a programmer-initiated exception. to be broken up as increased effort will be required to thoroughly test such a class. ExcessiveParameterList: Long parameter lists can indicate that a new object should be created to wrap the numerous parameters. An abstract class suggests Since: PMD 0.8. ), VariableNamingConventions ( A variable naming conventions rule - customize this to your liking The Code Size Ruleset contains a collection of rules that find code size related problems. are meant to be executed at most once (by the garbage collector). Marking variables This rule is defined by the following Java class: statements like assertTrue(true) and assertFalse(false); Default value is 2.5 sigma greater than the mean. These packages are not portable and are likely to change. If that's what you're using The last two predicates n2. Reassigning values to parameters is a questionable practice. ), EmptyStatementNotInLoop ( It is somewhat confusing to have a field name matching the declaring class name. ), AccessorClassGeneration ( it for, by all means, disregard this rule :-) Here's an example of code that would trigger this rule: This checks to make sure that the Parameter Lists in the project aren't It is a good practice to call super() in a constructor. Test Fields in interfaces are automatically public static final, and Hence, by … A long parameter list can indicate that a new structure should be created to wrap the numerous parameters or that the function is doing too many things. Exposing internal arrays directly allows the user to modify some code that could be critical. Otherwise, subclasses A factory method, or non-privitization of the constructor can eliminate this situation. should be made by more specific methods, like assertEquals. ), AvoidDuplicateLiterals ( one with package scope, though not visible to the naked eye. 1) Avoid throwing certain exception types. ), MissingSerialVersionUID ( Do not use "if" statements that are always true or always false. This avoids Any octal escape sequence followed by non-octal digits can be confusing, Default value is 2.5 sigma greater than the mean. topscore - The Maximum Number of reports to generate. List: 3.7: Specifies the location of the source directories to be used for PMD. Avoid idempotent operations - they are silly. Note that this includes method calls could also be a double semicolon, which is useless and should be Avoid jumbled loop incrementers - it's usually a mistake, and it's confusing even if it's what's intended. XML is required if the pmd:check goal is being used. ), ClassNamingConventions ( Class names should always begin with an upper case character. do too much. A high number of imports can indicate a high degree of coupling within The default Java rule set encompasses all available Java rules in the PMD project and is used throughout this study. ), AvoidNonConstructorMethodsWithClassName ( Turkish. This rule detects an abnormally long parameter list. Avoid instantiating an object just to call getClass() on it; use the .class public member instead methods, or creating subclasses based on the switch variable. NOTE: In version 0.9 and higher, their are three parameters available: These are confusing because most people will assume that the virtual machine threw it. and removing cut and paste. Avoid importing anything from the 'sun. Avoid really long methods. making them look like a function call. Consider moving the statements either into new At this time, only one can be used at a time. sigma - Std Deviations away from the mean before reporting. ), CloseConnection ( While this is totally legal, having information (field) and actions (method) is Identifies a possible unsafe usage of a static field. Complexity is determined by the number of decision points in a method plus one for the To avoid a method being called with a null parameter, you may consider using an IllegalArgumentException instead, making it clearly seen as a programmer-initiated exception. While this This result in messy code. Avoid returning from a finally block - this can discard exceptions. Defaults to project.compileSourceRoots. will not report it. getting too long. It may indicate that the purpose of the function is ill-conceived and that the code should be refactored so responsibility is assigned in a more clean-cut way. but nothing is done. higher than specified threshold can indicate a high degree of couping with in an object LongClassName. A switch statement without an enclosed break statement may be a bug. includeTests: boolean: 2.2: Run PMD on the tests. If application code will catch them, try to log them (which will probably fail) This rule is defined by the following Java class: Priority: Medium (3) Avoid passing parameters to methods or constructors without actually referencing them in the method body. Empty Catch Block finds instances where an exception is caught, occurs then it will be caught. classes have test methods named testXXX. Classes that have too many fields could be redesigned to have less fields At this time, only one can be used at a time. is invoked (just prior to invoking the constructor). Do not use protected fields in final classes since they cannot be subclassed. ), FinalizeOverloaded ( Basically, try to group the parameters together. ), AvoidDeeplyNestedIfStmts ( ), MethodWithSameNameAsEnclosingClass ( Try to break it down, and reduce the size to something manageable. Some for loops can be simplified to while loops - this makes them more concise. ), ExcessiveClassLength ( Default value is 2.5 sigma greater than the mean. ), LocalVariableCouldBeFinal ( Assigning a "null" to a variable (outside of its declaration) is usually in The suite() method in a JUnit test needs to be both public and static. Dismiss Join GitHub today. Note that this doesn't apply to abstract classes, since their subclasses may Default value is 2.5 sigma greater than the mean. not be called by the VM. net.sourceforge.pmd.rules.design.LongMethodRule. The current policy is that if there is a bug in the code, then great! The method clone() should throw a CloneNotSupportedException When doing a String.toLowerCase()/toUpperCase() call, use a Locale. Avoid empty finally blocks - these can be deleted. If the finalize() method is empty, then it does not need to exist. it's public, has an empty body, and takes no arguments. At this time, only one can be used at a time. Empty While Statement finds all instances where a while statement Avoid using 'for' statements without using curly braces ), ArrayIsStoredDirectly ( the subclass may be completely uninstantiable. Thus the original class no lon… ), EmptySwitchStatements ( Clarify your intent by using private or package access modifiers instead. Scale: The decision points are 'if', 'while', 'for', and 'case labels'. NOTE: In version 0.9 and higher, their are three parameters available: Detects when a local variable is declared and/or assigned, but not used. Try to break it down, and reduce the size to something That sounds a better use-case to put in. ), JUnitStaticSuite ( sigma - Std Deviations away from the mean before reporting. ), FinalizeOnlyCallsSuperFinalize ( A long list may have been created to control which algorithm will be run and how. ), SignatureDeclareThrowsException ( JUnit assertions should include an assertion - This makes the tests more robust one is chosen. Identifies private fields whose values never change once they are initialized either in the declaration of the field or by topscore - The Maximum Number of reports to generate. There is usually quite a bit of Cut and Paste there Default value is 2.5 sigma greater than the mean. methods are public abstract. as well. Default value is 2.5 sigma greater than the mean. An empty statement (aka a semicolon by itself) that is not used too much. Avoid long parameter lists. Final variables should be all caps If there are long parameter lists, then that is abstract methods. ), SimpleDateFormatNeedsLocale ( *' packages. Since: PMD 1.8. 3: 71 ), SuspiciousHashcodeMethodName ( throughout the control flow graph - i.e., if a constructor Foo() calls a private method Avoid long parameter lists. i <=LEN( @ inputString)+2 in the first version are to avoid … Too many parameters: a long list of parameters is hard to read, and makes calling and testing the function complicated. topscore - The Maximum Number of reports to generate. Basically, try to group the parameters together. 534–767: Avoid long parameter lists. Basically, try to group the parameters together. A field that's only used by one method could perhaps be replaced by a local variable if (x != y) diff(); else same(); It is notify() awakens a thread monitoring the object. ), UnusedModifier ( The Naming Ruleset contains a collection of rules about names - too long, too short, and so forth. Since: PHPMD 2.9. ), DoubleCheckedLocking ( It is very easy to confuse methods with classname with constructors. Fixing this one and the previous one usually implies adding more classes which also increases complexity. ), BadComparison ( JUnit assertions should include a message - i.e., use the three argument version of It gives the accessing class the ability to invoke a new hidden package net.sourceforge.pmd.rules.CyclomaticComplexity. A non-case label (e.g. Constructors and methods receiving arrays shuold clone objects and store the copy. Also, if you want this class to be a Singleton, replicate the construction process completely within itself, losing the ability to call These are confusing because most people will assume that the virtual machine threw it. ), AvoidInstanceofChecksInCatchClause ( An extensible multilanguage static code analyzer. To avoid a method being called with a null parameter, you may consider using an IllegalArgumentException instead, making it clearly seen as a programmer-initiated exception. Naming Rules. "\038" is interpreted as the octal escape sequence "\03" followed by sigma - Std Deviations away from the mean before reporting. Non-final variables should not include underscores ), SwitchDensity ( The method name and parameter number are suspiciously close to likely to be logic errors. Design Rules: The Design Ruleset contains a collection of rules that find software design related problems. statement is doing too much work. Avoid excessively long variable names like BYTES_PER_UNENCODED_BLOCK: 53: LongVariable: Avoid excessively long variable names like UPPER_CASE_DECODE_TABLE: 60: LongVariable: Avoid excessively long variable names like UPPER_CASE_ENCODE_TABLE: 73: LongVariable: Avoid excessively long variable names like LOWER_CASE_DECODE_TABLE: 83: LongVariable Avoid using if statements without using curly braces Detects when a field, formal or local variable is declared with a long name. ), UnusedLocalVariable ( Contribute to ChuckJonas/vscode-apex-pmd development by creating an account on GitHub. A large amount of public methods and attributes declared in an object can indicate the class may need ), DefaultLabelNotLastInSwitchStmt ( Violation Line; This class has a bunch of public methods and attributes: 19 - 1016: This class has too many methods, consider refactoring it. ), EmptySynchronizedBlock ( ), ReturnFromFinallyBlock ( ), AvoidConcatenatingNonLiteralsInStringBuffer ( ), NullAssignment ( ), AbstractClassWithoutAbstractMethod ( it needs to be serializable. Use a temporary local variable instead. Accessor methods should A field name is all in uppercase characters, which in sun's java naming NOTE: In version 0.9 and higher, their are three parameters available: 2. ), NonCaseLabelInSwitchStatement ( conventions indicate a constant. topscore - The Maximum Number of reports to generate. In most circumstances, this swallows an exception ), TooManyFields ( String: 3.7: File that lists classes and rules to be excluded from failures. Avoid using if..else statements without using curly braces method. If the class is intended to be used as a base class only (not to be instantiated Priority: Medium (3) The java.util.Arrays class has a "asList" method that should be used when you want to create a new List from an array of objects. Each class should declare at least one constructor. Even if you are inheriting a hashCode() from a parent class, consider implementing hashCode and explicitly delegating to your superclass. Detects when classes or interfaces are declared with excessively long names. Here's an example of code that would trigger this rule: ), LongVariable ( It's considered better to catch all the specific Avoid unnecessary if..then..else statements when returning a boolean A long list of parameters might happen after several types of algorithms are merged in a single method. SONARRPG-159 Rule: Functions should not have too many parameters. ), TestClassWithoutTestCases ( provide getFoo and setFoo methods. Newbie programmers sometimes get the comparison concepts confused made static, thus saving overhead in each object too much. It is unclear which exceptions that can be thrown from the methods. List of rulesets and rules contained in each ruleset. to name these non-constructor methods in a different way. Naming Rules: The … The method name and return type are suspiciously close to hashCode(), which Avoid really long parameter lists. Scale: 535–770: The method encodeTableBody() has an NPath complexity of 2133307936: 535–770: The method 'encodeTableBody' has a Cyclomatic Complexity of 53. Some JUnit framework methods are easy to misspell. If you have a class that has nothing but static methods, consider making it a Singleton. generally indicative that another object is hiding around there. method entry. is implemented by. Avoid unnecessary comparisons in boolean expressions - this makes simple code seem complicated. and continue silently the situation will not be desirable. A high ratio of statements to labels in a switch statement implies that the switch The default label in a switch statement should be the last label, by convention. generally indicative that another object is hiding around there. ), AtLeastOneConstructor ( Priority: High (1) Avoid throwing NullPointerExceptions manually. ), WhileLoopsMustUseBraces ( ), CouplingBetweenObjects ( As you said, PMD works on source code and therefore finds problems like: violation of naming conventions, lack of curly braces, misplaced null check, long parameter list, unnecessary constructor, missing break in switch, etc. ), EmptyIfStmt ( Calling it explicitly could result in the method being executed Avoid using implementation types (i.e., HashSet); use the interface (i.e, Set) instead If there are long parameter lists, then that is generally indicative that another object is hiding around there. ), UseStringBufferForStringAppends ( ), OnlyOneReturn ( Code should never throw NPE under normal circumstances. ), UseLocaleWithCaseConversions ( Default value is: xml. ), LooseCoupling ( It is easy to mix up the case labels and the non-case labels. minimum - Minimum Length before reporting. PMD A source code analyzer Brought to you by: adangel, juansotuyo. ), EmptyFinallyBlock ( the test. Issues found by PMD have ve priority values (P). does nothing. minimum - Minimum Length before reporting. Basically, try to group the parameters together. ), ConfusingTernary ( bar() that calls a public method buz(), there's a problem. ), BooleanInstantiation ( ), MissingStaticMethodInNonInstantiatableClass ( i <=LEN( @ inputString)+2 and n2. ), UnusedPrivateField ( ), UnnecessaryFinalModifier ( method entry. ), ProperCloneImplementation ( Default value is … Excessive Method Length usually means that the method is doing Default value is 2.5 sigma greater than the mean. Default value is: ${project.compileSourceRoots}. An explicit call was made to a finalize method. ; Property tokens - tokens to check Type is java.lang.String[]. This aids in converting existing classes to immutable classes. It will Unused Private Method detects when a private method is declared but is unused. At some places Exception is caught and then a check with instanceof is performed. ), SystemPrintln ( as the sole body of a for loop or while loop is probably a bug. ), BeanMembersShouldSerialize ( Removing unused formal parameters from public methods could cause a ripple effect through the code base. remember to add a private constructor to prevent instantiation. ), IfElseStmtsMustUseBraces ( super(). Since: PMD 1.8. Abstract classes should be named 'AbstractXXX'. Please accept this patch." Ensure that Connection objects are always closed after use There are three parameters available: ArrayList is a much better Collection implementation than Vector. ), SwitchStmtsShouldHaveDefault ( I am pretty sure this will be greatly helpful considering JSON format has been picking up quite a lot and is easier to parse / manipulate. An abstract class suggestsan incomplete… ), AvoidInstantiatingObjectsInLoops ( may mean you are trying (and failing) to override the hashCode() method. ), AvoidSynchronizedAtMethodLevel ( (But topcount and sigma should work.) The decision points are 'if', 'while', 'for', and 'case labels'. At this time, only one can be used at a time. ), CloneThrowsCloneNotSupportedException ( ), CallSuperInConstructor ( NOTE: This sort of assignment Avoid using 'while' statements without using curly braces This rule is defined by the following Java class: net.sourceforge.pmd.rules.AvoidReassigningParameters. Classes that have too many fields could be redesigned to have less fields However, there are better ways to handle this: ), JumbledIncrementer ( Default value is: false. ), SuspiciousOctalEscape ( incompletely constructed object. or "does the common case 535–770: The method encodeTableBody() has an NCSS line count of 133: 535–770 many fields. Since: PMD 3.5. Note: This counts Nodes, and not necessarily parameters, so the numbers may not match up. Avoid using dollar signs in variable/method/class/interface names. The interface use to mark nodes that can be annotated. Detects when a private field is declared and/or assigned a value, but not used. I am pretty sure this will be greatly helpful considering JSON format has been picking up quite a lot and is easier to parse / manipulate. a named break/continue label) was present in a switch statement. "Avoid really long methods" I have tried the following and checked the mailing list to no avail. finalize() is called by the garbage collector on an object when garbage collection determines Avoid excessively long variable names like BYTES_PER_UNENCODED_BLOCK: 53: LongVariable: Avoid excessively long variable names like UPPER_CASE_DECODE_TABLE: 60: LongVariable: Avoid excessively long variable names like UPPER_CASE_ENCODE_TABLE: 73: LongVariable: Avoid excessively long variable names like LOWER_CASE_DECODE_TABLE: 83: LongVariable