public class EqualsHashCodeCheck extends Check
Checks that classes that override equals() also override hashCode().
Rationale: The contract of equals() and hashCode() requires that equal objects have the same hashCode. Hence, whenever you override equals() you must override hashCode() to ensure that your class can be used in collections that are hash based.
An example of how to configure the check is:
<module name="EqualsHashCode"/>
Modifier and Type | Field and Description |
---|---|
static String |
MSG_KEY
A key is pointing to the warning message text in "messages.properties"
file.
|
Constructor and Description |
---|
EqualsHashCodeCheck() |
Modifier and Type | Method and Description |
---|---|
void |
beginTree(DetailAST rootAST)
Called before the starting to process a tree.
|
void |
finishTree(DetailAST rootAST)
Called after finished processing a tree.
|
int[] |
getAcceptableTokens()
The configurable token set.
|
int[] |
getDefaultTokens()
Returns the default token a check is interested in.
|
int[] |
getRequiredTokens()
The tokens that this check must be registered for.
|
void |
visitToken(DetailAST ast)
Called to process a token.
|
destroy, getClassLoader, getFileContents, getLine, getLines, getTabWidth, getTokenNames, init, isCommentNodesRequired, leaveToken, log, log, setClassLoader, setFileContents, setMessages, setTabWidth, setTokens
getCustomMessages, getId, getMessageBundle, getSeverity, getSeverityLevel, log, setId, setSeverity
configure, contextualize, finishLocalSetup, getConfiguration, setupChild
public static final String MSG_KEY
public EqualsHashCodeCheck()
public int[] getDefaultTokens()
Check
getDefaultTokens
in class Check
TokenTypes
public int[] getAcceptableTokens()
Check
getAcceptableTokens
in class Check
TokenTypes
public int[] getRequiredTokens()
Check
getRequiredTokens
in class Check
TokenTypes
public void beginTree(DetailAST rootAST)
Check
public void visitToken(DetailAST ast)
Check
visitToken
in class Check
ast
- the token to processpublic void finishTree(DetailAST rootAST)
Check
finishTree
in class Check
rootAST
- the root of the treeCopyright © 2001–2016. All rights reserved.