net.sourceforge.pmd.rules.design

Class UseCollectionIsEmpty

java.lang.Object

net.sourceforge.pmd.CommonAbstractRule

net.sourceforge.pmd.AbstractJavaRule

net.sourceforge.pmd.AbstractRule

net.sourceforge.pmd.rules.AbstractInefficientZeroCheck

net.sourceforge.pmd.rules.design.UseCollectionIsEmpty

All Implemented Interfaces:

JavaParserVisitor, Rule

public class UseCollectionIsEmpty
extends AbstractInefficientZeroCheck

Detect structures like "foo.size() == 0" and suggest replacing them with foo.isEmpty(). Will also find != 0 (replacable with !isEmpty()).

Author:

Jason Bennett

Field Summary

Fields inherited from interface net.sourceforge.pmd.Rule

LOWEST_PRIORITY, PRIORITIES

Constructor Summary

Constructors

Constructor and Description
UseCollectionIsEmpty()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	appliesToClassName(java.lang.String name)
boolean	isTargetMethod(NameOccurrence occ) Determine if we're dealing with .size method

Methods inherited from class net.sourceforge.pmd.rules.AbstractInefficientZeroCheck

visit

Methods inherited from class net.sourceforge.pmd.AbstractJavaRule

addViolation, addViolation, addViolation, addViolationWithMessage, apply, getDeclaringType, importsPackage, isQualifiedName, 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, visitAll

Methods inherited from class net.sourceforge.pmd.CommonAbstractRule

addExample, addProperties, addProperty, addRuleChainVisit, asFixedMap, asFixedMap, end, equals, getBooleanProperties, getBooleanProperty, getBooleanProperty, getDescription, getDoubleProperties, getDoubleProperty, getDoubleProperty, getExample, getExamples, getExternalInfoUrl, getIntProperties, getIntProperty, getIntProperty, getMessage, getName, getPriority, getPriorityName, getProperties, getRuleChainVisits, getRuleClass, getRuleSetName, getSince, getStringProperties, getStringProperty, getStringProperty, getTypeProperties, getTypeProperty, hashCode, hasProperty, include, propertiesByName, propertyDescriptorFor, setDescription, setExternalInfoUrl, setInclude, setMessage, setName, setPriority, setProperties, setProperty, setRuleClass, setRuleSetName, setSince, setUsesDFA, setUsesTypeResolution, start, usesDFA, usesRuleChain, usesTypeResolution

Methods inherited from class java.lang.Object

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

Constructor Detail

UseCollectionIsEmpty

public UseCollectionIsEmpty()

Method Detail

appliesToClassName

public boolean appliesToClassName(java.lang.String name)

Specified by:

appliesToClassName in class AbstractInefficientZeroCheck

isTargetMethod

public boolean isTargetMethod(NameOccurrence occ)

Determine if we're dealing with .size method

Specified by:

isTargetMethod in class AbstractInefficientZeroCheck

Parameters:

occ - The name occurance

Returns:

true if it's .length, else false