Package net.sourceforge.pmd.lang.java.rule.design

Class LawOfDemeterRule

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.design.LawOfDemeterRule

All Implemented Interfaces:

AstVisitor, JavaVisitor, Rule, PropertySource

public class LawOfDemeterRule
extends AbstractJavaRule

This rule can detect possible violations of the Law of Demeter. The Law of Demeter is a simple rule, that says "only talk to friends". It helps to reduce coupling between classes or objects.

See:

• Andrew Hunt, David Thomas, and Ward Cunningham. The Pragmatic Programmer. From Journeyman to Master. Addison-Wesley Longman, Amsterdam, October 1999.
• K.J. Lieberherr and I.M. Holland. Assuring good style for object-oriented programs. Software, IEEE, 6(5):38–48, 1989.

Author:

Clément Fournier

Since:

5.0

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
LawOfDemeterRule()

Method Summary

Modifier and Type	Method	Description
void	apply(Node target, RuleContext ctx)
Object	visit(ASTFieldAccess node, Object data)
Object	visit(ASTMethodCall node, Object data)

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

visitNode

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

addExample, asCtx, buildTargetSelector, 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, visitJavaNode

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

LawOfDemeterRule

public LawOfDemeterRule()

Method Details

apply

public void apply(Node target,
 RuleContext ctx)

Specified by:

apply in interface Rule

Overrides:

apply in class AbstractJavaRule

visit

public Object visit(ASTFieldAccess node,
 Object data)

visit

public Object visit(ASTMethodCall node,
 Object data)