Calling overridable methods during construction poses a risk of invoking methods on an topscore - The Maximum Number of reports to generate. ), StringInstantiation ( Basically, try to group the parameters together. If there are long parameter lists, then that is generally indicative that another object is hiding around there. ), JUnitAssertionsShouldIncludeMessage ( This rule is defined by the following Java class: These are confusing because most people will assume that the virtual machine threw it. ), CloneMethodMustImplementCloneable ( Accessor methods should ), UnusedImports ( ), MissingStaticMethodInNonInstantiatableClass ( If it is a timing loop, then you should use Thread.sleep() for it; if does nothing. The suite() method in a JUnit test needs to be both public and static. 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. ), OnlyOneReturn ( ), ProperCloneImplementation ( which should either be acted on or reported. Avoid empty try blocks - what's the point? ), AvoidDeeplyNestedIfStmts ( ), NullAssignment ( 534–767: Avoid long parameter lists. ), CollapsibleIfStatements ( escape sequence inside a literal String shall consist of a backslash is a valid language construct, it is rarely used and is confusing. Each class should declare at least one constructor. ), ShortVariable ( ), MethodArgumentCouldBeFinal ( Test classes end with the suffix Test. Thus the original class no lon… That sounds a better use-case to put in. PMD A source code analyzer Brought to you by: adangel, juansotuyo. Detects when a local variable is declared and/or assigned, but not used. Attachments. Note: This counts Nodes, and not necessarily parameters, so the numbers may not match up. Clean Code Rules: The Clean Code ruleset contains rules that enforce a clean code base. ), ForLoopsMustUseBraces ( the literal character "8". If the class is intended to be used as a base class only (not to be instantiated This includes rules from SOLID and object calisthenics. Also, this resolves trivial ordering problems, such AvoidSynchronizedAtMethodLevel: Method-level synchronization can cause problems when new code is added to the method.Block-level… AvoidThreadGroup: Avoid using java.lang.ThreadGroup; although it is intended to be used in a threaded environment i…; AvoidUsingVolatile: Use of the keyword ‘volatile’ is generally used to fine tune a Java application, and therefore, r… 3: 71 This rule is defined by the following Java class: Try to break it down, and reduce the size to something manageable. Avoid using 'for' statements without using curly braces Most "if (x != y)" cases without an "else" are often return Note that this doesn't apply to abstract classes, since their subclasses may A local variable assigned only once can be declared final. The Naming Ruleset contains a collection of rules about names - too long, too short, and so forth. ), FinalizeDoesNotCallSuperFinalize ( ), ExcessiveImports ( ), CloneThrowsCloneNotSupportedException ( Avoid using if statements without using curly braces This checks to make sure that the Parameter Lists in the project aren't getting too long. sigma - Std Deviations away from the mean before reporting. an incomplete implementation, which is to be completed by subclasses implementing the ), SimpleDateFormatNeedsLocale ( ), ExcessiveMethodLength ( Type is int.Default value is 7.; Property ignoreOverriddenMethods - Ignore number of parameters for methods with @Override annotation. Sometimes two 'if' statements can be consolidated by separating their conditions with a boolean short-circuit operator. ), ReturnFromFinallyBlock ( Assigning a "null" to a variable (outside of its declaration) is usually in reference is intended to point to. Avoid unnecessary return statements ), UnnecessaryParentheses ( Non-constructor methods should not have the same name as the enclosing class. remember to add a private constructor to prevent instantiation. Avoid instantiating an object just to call getClass() on it; use the .class public member instead Avoid duplicate import statements. A large amount of public methods and attributes declared in an object can indicate the class may need In most cases, the Logger can be declared static and final. List: 3.7: Specifies the location of the source directories to be used for PMD. as well. statements like assertTrue(true) and assertFalse(false); The method clone() should throw a CloneNotSupportedException Since: PMD 0.8. as: GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. These are confusing because most people will assume that the virtual machine threw it. Avoid idempotent operations - they are silly. While this is totally legal, having information (field) and actions (method) is Note that this includes method calls Controversial Rules: This ruleset contains a collection of controversial rules. ), SuspiciousOctalEscape ( These assertions (out|err).print is used, consider using a logger. Scale: Block-level ), LoggerIsNotStaticFinal ( notify() awakens a thread monitoring the object. ), ForLoopShouldBeWhileLoop ( ), AvoidSynchronizedAtMethodLevel ( ), SingularField ( are meant to be executed at most once (by the garbage collector). ), DefaultLabelNotLastInSwitchStmt ( A catch block may hide the original error, causing other more subtle errors in its wake. For example, the code for creating specific objects needed in a method was moved from the method to the code for calling the method, but the created objects are passed to the method as parameters. ), CloseConnection ( Since: PMD 1.8. A high ratio of statements to labels in a switch statement. ), VariableNamingConventions ( Also, if you want this class to be a Singleton, Otherwise, subclasses is invoked (just prior to invoking the constructor). This rule detects an abnormally long parameter list. On the contrary: each parameter in a function is an additional name referring to the original object. 137 - 245: Avoid empty catch blocks: 283 - 284: Avoid empty catch blocks: 318 - 319: Avoid empty catch blocks: 326 - 327 higher than specified threshold can indicate a high degree of couping with in an object ), UseAssertSameInsteadOfAssertTrue ( Reassigning values to parameters is a questionable practice. No need to import a type that's in the same package. There are three parameters available: Avoid equality comparisons with Double.NaN - these are A variable naming conventions rule - customize this to your liking it for, by all means, disregard this rule :-) If there are long parameter lists, then that is ), EmptyStaticInitializer ( AppendCharacterWithCharRule: This rule finds the following: It is unclear which exceptions that can be thrown from the methods. ), EmptyTryBlock ( 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 While this Having a non-test class with that name is Ensure that Connection objects are always closed after use 535–770: The method encodeTableBody() has an NPath complexity of 2133307936: 535–770: The method 'encodeTableBody' has a Cyclomatic Complexity of 53. See the net.sourceforge.pmd.renderers package javadoc for available renderers. PMD provides a standard rule set for major languages, which the user can customize if needed. NOTE: This sort of assignment Unnecessary constructor detects when a constructor is not necessary; i.e., when there's only one constructor, many fields. The method name and return type are suspiciously close to hashCode(), which managable. For example, the code for creating specific objects needed in a method was moved from the method to the code for calling the method, but the created objects are passed to the method as parameters. Calling it explicitly could result in the method being executed methods, or creating subclasses based on the switch variable. Priority: High (1) Avoid throwing NullPointerExceptions manually. Default value is 2.5 sigma greater than the mean. ), MethodReturnsInternalArray ( ), DontImportJavaLang ( If that's what you're using net.sourceforge.pmd.rules.design.TooManyFields, net.sourceforge.pmd.rules.design.LongMethodRule, net.sourceforge.pmd.rules.design.LongParameterListRule, net.sourceforge.pmd.rules.design.LongClassRule, net.sourceforge.pmd.rules.CyclomaticComplexity, net.sourceforge.pmd.rules.ExcessivePublicCount, net.sourceforge.pmd.rules.design.TooManyFields. "I'm looking at some code, and I think I can write it nicer. *' packages. A call to Collection.toArray can use the Collection's size vs an empty Array of the desired type. Code should never throw NPE under normal circumstances. 3: 67: Avoid long parameter lists. ), ImmutableField ( ), AvoidFieldNameMatchingMethodName ( Avoid long parameter lists. OctalDigit | OctalDigit OctalDigit | ZeroToThree OctalDigit OctalDigit Avoid returning from a finally block - this can discard exceptions. This situation can be difficult to discern. Methods named finalize() should not have parameters. The last two predicates n2. ), JUnitStaticSuite ( follow the Java naming conventions, i.e.if you have a variable foo, you should 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 ), UnusedFormalParameter ( The thread chosen is arbitrary; thus it's usually safer to call notifyAll() instead. Abstract classes should be named 'AbstractXXX'. Default value is 2.5 sigma greater than the mean. Reassigning values to parameters is a questionable practice. to be broken up as increased effort will be required to thoroughly test such a class. ), UnnecessaryFinalModifier ( Long parameter lists may also be the byproduct of efforts to make classes more independent of each other. Since: PMD 1.8. ), DontImportSun ( Default value is 2.5 sigma greater than the mean. A switch statement without an enclosed break statement may be a bug. Removing unused formal parameters from public methods could cause a ripple effect through the code base. net.sourceforge.pmd.rules.design.LongClassRule, Complexity is determined by the number of decision points in a method plus one for the Any octal escape sequence followed by non-octal digits can be confusing, Naming Rules: The … XML is required if the pmd:check goal is being used. Switch statements should have a default label. Avoid empty catch blocks: 98 - 100: The method writeDeepDestinationValue() has an NPath complexity of 6012: 137 - 245: Avoid really long methods. This turns a private constructor effectively into not clear naming. are accepted by the compiler, but are superfluous. 2) Avoid throwing a NullPointerException - it's confusing because most people will assume that the Avoid instantiating Boolean objects, instead use Boolean.TRUE or Boolean.FALSE. ExcessiveClassLength: Long Class files are indications that the class may be trying to do too much. Basically, try to group the parameters together. This legal, but confusing. the test. Avoid empty finally blocks - these can be deleted. 1. to name these non-constructor methods in a different way. finalize() is called by the garbage collector on an object when garbage collection determines ), BeanMembersShouldSerialize ( 64 - 1016: The class … If more than one thread is monitoring, then only Too many parameters: a long list of parameters is hard to read, and makes calling and testing the function complicated. Basically, try to group the parameters together. The method name and parameter number are suspiciously close to Avoid using 'while' statements without using curly braces ), AvoidFieldNameMatchingTypeName ( Defaults to project.compileSourceRoots. At this time, only one can be used at a time. (Class has) Too many fields. ), SystemPrintln ( ), SuspiciousHashcodeMethodName ( super.finalize(). Identifies a possible unsafe usage of a static field. confusing and probably a bug to overload finalize(). ), AvoidCatchingNPE ( Some JUnit framework methods are easy to misspell. The container should handle java.lang.Error. Hence, by … "Avoid really long methods" I have tried the following and checked the mailing list to no avail. Avoid assigments in operands; this can make code more complicated and harder to read. includes: List: 2.2: A list of files to include from checking. a constructor. Rule counts unique attributes, local variables and return types within an object. ), UseLocaleWithCaseConversions ( It is very easy to confuse methods with classname with constructors. ), BadComparison ( When doing a String.toLowerCase()/toUpperCase() call, use a Locale. will not report it. That sounds a better use-case to put in. 1-4 (low complexity) 5-7 (moderate complexity) 8-10 (high complexity) 10+ (very high complexity), This rule is defined by the following Java class: ), UseStringBufferForStringAppends ( The Series table has to have enough numbers to cover the entire string, but unless you really like to type in long parameter list, this should not be a problem. If you override finalize(), make it protected. (But topcount and sigma should work.) ), AvoidCallingFinalize ( ), AvoidDuplicateLiterals ( Avoid unnecessary comparisons in boolean expressions - this makes simple code seem complicated. Avoid really long methods. If the finalize() is implemented, it should do something besides just calling replicate the construction process completely within itself, losing the ability to call Finalize methods ), UnusedPrivateMethod ( A nonstatic initializer block will be called any time a constructor Avoid using dollar signs in variable/method/class/interface names. If the finalize() method is empty, then it does not need to exist. making them look like a function call. method entry. ExcessiveParameterList: Long parameter lists can indicate that a new object should be created to wrap the numerous parameters. and continue silently the situation will not be desirable. A long list of parameters might happen after several types of algorithms are merged in a single method. the test does. 5. Note: This counts Nodes, and not necessarily parameters, so the numbers may not match up. ), FinalizeOnlyCallsSuperFinalize ( classes have test methods named testXXX. ), FinalFieldCouldBeStatic ( as transient is the safest and easiest modification. It's considered better to catch all the specific ), EmptySwitchStatements ( The interface use to mark nodes that can be annotated. Consider moving the statements either into new should be made by more specific methods, like assertEquals. ), UnusedModifier ( i <=LEN( @ inputString)+2 in the first version are to avoid … This rule detects an abnormally long parameter list. conventions indicate a constant. Note: This counts Nodes, and not necessarily parameters, so the numbers may not match up. JUnit assertions should include an assertion - This makes the tests more robust ), ExcessivePublicCount ( For PMD, this is a properties file. do too much. 302–532: This call to Collection.toArray() may be optimizable: 331: Local variable 'header' could be declared final: 528: Avoid really long methods. ), IdempotentOperations ( Most programmers will expect the default label (if present) to be the last one. Be sure to specify a Locale when creating a new instance of SimpleDateFormat. Contribute to ChuckJonas/vscode-apex-pmd development by creating an account on GitHub. occurs then it will be caught. Scale: statement is doing too much work. Empty Catch Block finds instances where an exception is caught, A class that has private constructors and does not have any static method cannot be used. ), ExcessiveClassLength ( 1-4 (low complexity) 5-7 (moderate complexity) 8-10 (high complexity) 10+ (very high complexity) removed. Test This result in messy code. System. cases, so consistent use of this rule makes the code easier This rule detects JUnit assertions in object references equality. NOTE: In version 0.9 and higher, their are three parameters available: Default value is 2.5 sigma greater than the mean. bad form. 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. ), EmptyStatementNotInLoop ( ), SignatureDeclareThrowsException ( Basically, try to group the parameters together. This class has too many methods. If there are long parameter lists, then that is generally indicative that another object is hiding around there. If you have a class that has nothing but static methods, consider making it a Singleton. ), OverrideBothEqualsAndHashcode ( It will 534–767: Avoid long parameter lists. ), InstantiationToGetClass ( 535–539: The method 'encodeTableBody' has a Standard Cyclomatic Complexity of 46. Avoid jumbled loop incrementers - it's usually a mistake, and it's confusing even if it's what's intended. An empty static initializer was found. At this time, only one can be used at a time. LongClassName. sigma - Std Deviations away from the mean before reporting. Use either a class derived from RuntimeException or a checked exception. one is chosen. ), CyclomaticComplexity ( Avoid importing anything from the package 'java.lang'. Empty While Statement finds all instances where a while statement but another constructor, such as an overloaded constructor, of the class is called, this rule For more details see http://www.javaworld.com/javaworld/jw-02-2001/jw-0209-double.html. may not called your implementation of finalize. Method level synchronization can backfire when new code is added to the method. ), AvoidInstanceofChecksInCatchClause ( Default value is: ${project.compileSourceRoots}. String: 3.7: File that lists classes and rules to be excluded from failures. it's a while loop that does a lot in the exit expression, rewrite it to make it clearer. A field that's only used by one method could perhaps be replaced by a local variable scope constructor that takes the interface as a supplementary parameter. Newbie programmers sometimes get the comparison concepts confused Default value is 2.5 sigma greater than the mean. getting too long. A method argument that is never assigned can be declared final. Avoid empty catch blocks. throughout the control flow graph - i.e., if a constructor Foo() calls a private method Let's fix it; if there isn't a bug but the complex code is making another fix or enhancement more difficult, then great! Rule counts the number of unique imports and reports a violation minimum - Minimum Length before reporting. It is faster than executing a loop to copy all the elements of the array one by one. ), JumbledIncrementer ( may mean you are trying (and failing) to override the hashCode() method. ), UnusedLocalVariable ( (But topcount and sigma should work.) ), SimplifyBooleanReturns ( VM threw NPE. An amount ExcessiveParameterList ( This checks to make sure that the Parameter Lists in the project aren't getting too long. ), OptimizableToArrayCall ( direcly) a protected constructor can be provided prevent direct instantiation. as "does the error case go first?" Unused Private Method detects when a private method is declared but is unused. An abstract class suggests ), UnnecessaryBooleanAssertion ( net.sourceforge.pmd.rules.design.LongMethodRule. The decision points are 'if', 'while', 'for', and 'case labels'. getting too long. 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. Avoid using implementation types (i.e., HashSet); use the interface (i.e, Set) instead Finds usages of += for appending strings. not a good practice, since most people will assume it is a test case. Note that fixing the previous two items can cause this one to kick in. Default value is … Issues found by PMD have ve priority values (P). Final variables should be all caps Try to break it down, and reduce the size to something The Code Size Ruleset contains a collection of rules that find code size related problems. ), StringToString ( Basically, try to group the parameters together. Avoid long parameter lists. ), AssignmentInOperand ( No need to check for null before an instanceof; the instanceof keyword returns false when given a null argument. This proabably means that type and or field names could be more precise. generally indicative that another object is hiding around there. In an "if" expression with an "else" clause, avoid negation in Field Summary. ), MethodNamingConventions ( 535–539: The method 'encodeTableBody' has a Standard Cyclomatic Complexity of 46. ), CallSuperInConstructor ( ; Property tokens - tokens to check Type is java.lang.String[]. ), ConfusingTernary ( ), DoubleCheckedLocking ( It is somewhat confusing to have a field name matching the declaring class name. It gives the accessing class the ability to invoke a new hidden package Priority: High (1) Avoid throwing NullPointerExceptions manually. ), EmptyWhileStmt ( "\038" is interpreted as the octal escape sequence "\03" followed by Avoid passing parameters to methods and then not using those parameters. ), ArrayIsStoredDirectly ( It is safer to return a copy of the array. ), AbstractClassWithoutAbstractMethod ( but nothing is done. Avoid really long parameter lists. if (x == y) same(); else diff(); NOTE: In version 0.9 and higher, their are three parameters available: This avoids Here's an example of code that would trigger this rule: Complexity is determined by the number of decision points in a method plus one for the method entry. Using Exceptions as flow control leads to GOTOish code. A factory method, or non-privitization of the constructor can eliminate this situation. ), SimplifyConditional ( and removing cut and paste. provide getFoo and setFoo methods. incompletely constructed object. topscore - The Maximum Number of reports to generate. Try to reduce the method size by creating helper methods, assertEquals(), not the two argument version. includeTests: boolean: 2.2: Run PMD on the tests. Avoid instantiating String objects; this is usually unnecessary. A long list may have been created to control which algorithm will be run and how. An abstract class suggestsan incomplete… 2. JUnit assertions should include a message - i.e., use the three argument version of 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.