net.sourceforge.pmd.rules.strings

Class UseStringBufferLength

java.lang.Object

net.sourceforge.pmd.CommonAbstractRule

net.sourceforge.pmd.AbstractJavaRule

net.sourceforge.pmd.AbstractRule

net.sourceforge.pmd.rules.strings.UseStringBufferLength

All Implemented Interfaces:

JavaParserVisitor, Rule

public class UseStringBufferLength
extends AbstractRule

This rule finds places where StringBuffer.toString() is called just to see if the string is 0 length by either using .equals("") or toString().length()

 StringBuffer sb = new StringBuffer("some string");
 if (sb.toString().equals("")) {
     // this is wrong
 }
 if (sb.length() == 0) {
     // this is right
 }
 

Author:

acaplan

Field Summary

Fields inherited from interface net.sourceforge.pmd.Rule

LOWEST_PRIORITY, PRIORITIES

Constructor Summary

Constructors

Constructor and Description
UseStringBufferLength()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	visit(ASTCompilationUnit acu, java.lang.Object data)
java.lang.Object	visit(ASTName decl, java.lang.Object data)

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, 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

UseStringBufferLength

public UseStringBufferLength()

Method Detail

visit

public java.lang.Object visit(ASTCompilationUnit acu,
                     java.lang.Object data)

Specified by:

visit in interface JavaParserVisitor

Overrides:

visit in class AbstractJavaRule

visit

public java.lang.Object visit(ASTName decl,
                     java.lang.Object data)

Specified by:

visit in interface JavaParserVisitor

Overrides:

visit in class AbstractJavaRule