Package com.qulice.pmd.rules

Class UseCollectionsSingletonListRule

java.lang.Object
net.sourceforge.pmd.properties.AbstractPropertySource
net.sourceforge.pmd.lang.rule.AbstractRule
net.sourceforge.pmd.lang.java.rule.AbstractJavaRule
net.sourceforge.pmd.lang.java.rule.AbstractJavaRulechainRule
com.qulice.pmd.rules.UseCollectionsSingletonListRule
All Implemented Interfaces:
net.sourceforge.pmd.lang.ast.AstVisitor, net.sourceforge.pmd.lang.java.ast.JavaVisitor, net.sourceforge.pmd.lang.rule.Rule, net.sourceforge.pmd.properties.PropertySource
public final class UseCollectionsSingletonListRule extends net.sourceforge.pmd.lang.java.rule.AbstractJavaRulechainRule
Rule to flag Arrays.asList invocations that are passed a single non-array argument. Arrays.asList(x) where x is a scalar (e.g. an int, a String or any non-array reference) ends up allocating a backing one-element array via varargs and a wrapper list around it. Collections.singletonList(x) expresses the same intent with a single, immutable, fixed-size list and no implicit array allocation. A single array argument is not flagged because that form either spreads the array's elements (for reference arrays) or wraps the array itself in a one-element list (for primitive arrays), and either behaviour may be intentional.
Since:
0.26.0

  • Field Summary

    Fields inherited from interface net.sourceforge.pmd.lang.rule.Rule

    VIOLATION_SUPPRESS_REGEX_DESCRIPTOR, VIOLATION_SUPPRESS_XPATH_DESCRIPTOR

  • Constructor Summary

    Constructors
    Constructor
    Description
    UseCollectionsSingletonListRule()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    Object
    visit(net.sourceforge.pmd.lang.java.ast.ASTMethodCall call, Object data)
     

    Methods inherited from class net.sourceforge.pmd.lang.java.rule.AbstractJavaRulechainRule

    buildTargetSelector, visitJavaNode

    Methods inherited from class net.sourceforge.pmd.lang.java.rule.AbstractJavaRule

    apply, visitNode

    Methods inherited from class net.sourceforge.pmd.lang.rule.AbstractRule

    addExample, asCtx, deepCopy, dysfunctionReason, end, equals, getDescription, getExamples, getExternalInfoUrl, getLanguage, getMaximumLanguageVersion, getMessage, getMinimumLanguageVersion, getName, getPriority, getPropertySourceType, getRuleClass, getRuleSetName, getSince, getTargetSelector, hashCode, isDeprecated, setDeprecated, setDescription, setExternalInfoUrl, setLanguage, setMaximumLanguageVersion, setMessage, setMinimumLanguageVersion, setName, setPriority, setRuleClass, setRuleSetName, setSince, start

    Methods inherited from class net.sourceforge.pmd.properties.AbstractPropertySource

    definePropertyDescriptor, getOverriddenPropertiesByPropertyDescriptor, getOverriddenPropertyDescriptors, getPropertiesByPropertyDescriptor, getProperty, getPropertyDescriptor, getPropertyDescriptors, hasDescriptor, isPropertyOverridden, setProperty

    Methods inherited from class java.lang.Object

    clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

    Methods inherited from interface net.sourceforge.pmd.lang.ast.AstVisitor

    cannotVisit

    Methods inherited from interface net.sourceforge.pmd.lang.java.ast.JavaVisitor

    visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit

    Methods inherited from interface net.sourceforge.pmd.properties.PropertySource

    definePropertyDescriptor, getOverriddenPropertiesByPropertyDescriptor, getOverriddenPropertyDescriptors, getPropertiesByPropertyDescriptor, getProperty, getPropertyDescriptor, getPropertyDescriptors, hasDescriptor, isPropertyOverridden, setProperty

    Methods inherited from interface net.sourceforge.pmd.lang.rule.Rule

    initialize

  • Constructor Details

    • UseCollectionsSingletonListRule

      public UseCollectionsSingletonListRule()

  • Method Details

    • visit

      public Object visit(net.sourceforge.pmd.lang.java.ast.ASTMethodCall call, Object data)