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27-January-2019 - 6.11.0

The PMD team is pleased to announce PMD 6.11.0.

This is a minor release.

New and noteworthy

Updated Apex Support

  • The Apex language support has been bumped to version 45 (Spring ‘19). All new language features are now properly parsed and processed.
  • Many nodes now expose more informations, such as the operator for BooleanExpressions. This makes these operators consumable by XPath rules, e.g. //BooleanExpression[@Operator='&&'].

PL/SQL Grammar improvements

  • In this release, many parser bugs in our PL/SQL support have been fixed. This adds e.g. support for table collection expressions (SELECT * FROM TABLE(expr)).
  • Support for parsing insert statements has been added.
  • More improvements are planned for the next release of PMD.

New Rules

  • The new Java rule UnsynchronizedStaticFormatter (java-multithreading) detects unsynchronized usages of static java.text.Format instances. This rule is a more generic replacement of the rule UnsynchronizedStaticDateFormatter which focused just on DateFormat.

  • The new Java rule ForLoopVariableCount (java-bestpractices) checks for the number of control variables in a for-loop. Having a lot of control variables makes it harder to understand what the loop does. The maximum allowed number of variables is by default 1 and can be configured by a property.

  • The new Java rule AvoidReassigningLoopVariables (java-bestpractices) searches for loop variables that are reassigned. Changing the loop variables additionally to the loop itself can lead to hard-to-find bugs.

  • The new Java rule UseDiamondOperator (java-codestyle) looks for constructor calls with explicit type parameters. Since Java 1.7, these type parameters are not necessary anymore, as they can be inferred now.

Modified Rules

  • The Java rule LocalVariableCouldBeFinal (java-codestyle) has a new property ignoreForEachDecl, which is by default disabled. The new property allows for ignoring non-final loop variables in a for-each statement.

Deprecated Rules

Fixed Issues

  • core
    • #1196: [core] CPD results not consistent between runs
    • #1496 [core] Refactor metrics to be dealt with generically from pmd-core
  • apex
    • #1542: [apex] Include the documentation category
    • #1546: [apex] PMD parsing exception for Apex classes using ‘inherited sharing’ keyword
    • #1568: [apex] AST node attribute @Image not usable / always null in XPath rule / Designer
  • java
    • #1556: [java] Default methods should not be considered abstract
    • #1578: [java] Private field is detected as public inside nested classes in interfaces
  • java-bestpractices
    • #658: [java] OneDeclarationPerLine: False positive for loops
    • #1518: [java] New rule: AvoidReassigningLoopVariable
    • #1519: [java] New rule: ForLoopVariableCount
  • java-codestyle
    • #1513: [java] LocalVariableCouldBeFinal: allow excluding the variable in a for-each loop
    • #1517: [java] New Rule: UseDiamondOperator
  • java-errorprone
    • #1035: [java] ReturnFromFinallyBlock: False positive on lambda expression in finally block
    • #1549: [java] NPE in PMD 6.8.0 InvalidSlf4jMessageFormat
  • java-multithreading
    • #1533: [java] New rule: UnsynchronizedStaticFormatter
  • plsql
    • #1507: [plsql] Parse Exception when using ‘   ’ operator in where clause
    • #1508: [plsql] Parse Exception when using SELECT COUNT(*)
    • #1509: [plsql] Parse Exception with OUTER/INNER Joins
    • #1511: [plsql] Parse Exception with IS NOT NULL
    • #1526: [plsql] ParseException when using TableCollectionExpression
    • #1583: [plsql] Update Set Clause should allow multiple columns
    • #1586: [plsql] Parse Exception when functions are used with LIKE
    • #1588: [plsql] Parse Exception with function calls in WHERE clause

API Changes

External Contributions

  • #1503: [java] Fix for ReturnFromFinallyBlock false-positives - RishabhDeep Singh
  • #1514: [java] LocalVariableCouldBeFinal: allow excluding the variable in a for-each loop - Kris Scheibe
  • #1516: [java] OneDeclarationPerLine: Don’t report multiple variables in a for statement. - Kris Scheibe
  • #1520: [java] New rule: ForLoopVariableCount: check the number of control variables in a for loop - Kris Scheibe
  • #1521: [java] Upgrade to ASM7 for JDK 11 support - Mark Pritchard
  • #1530: [java] New rule: AvoidReassigningLoopVariables - Kris Scheibe
  • #1534: [java] This is the change regarding the usediamondoperator #1517 - hemanshu070
  • #1545: [doc] fixing dead links + tool to check for dead links automatically - Kris Scheibe
  • #1551: [java] InvalidSlf4jMessageFormatRule should not throw NPE for enums - Robbie Martinus
  • #1552: [core] Upgrading Google Gson from 2.5 to 2.8.5 - Thunderforge
  • #1553: [core] Upgrading System Rules dependency from 1.8.0 to 1.19.0 - Thunderforge
  • #1554: [plsql] updates should allow for multiple statements - tashiscool
  • #1584: [core] Fixes 1196: inconsistencies of clones returned by different CPD executions for the same files - Bruno Ferreira