Package com.alibaba.druid.sql.ast.expr

Class SQLNullExpr

java.lang.Object

com.alibaba.druid.sql.ast.SQLObjectImpl

com.alibaba.druid.sql.ast.SQLExprImpl

com.alibaba.druid.sql.ast.expr.SQLNullExpr

All Implemented Interfaces:

SQLLiteralExpr, SQLValuableExpr, SQLExpr, SQLObject, Cloneable

public final class SQLNullExpr
extends SQLExprImpl
implements SQLLiteralExpr, SQLValuableExpr

Field Summary

Fields inherited from class com.alibaba.druid.sql.ast.SQLObjectImpl

attributes, hint, parent, sourceColumn, sourceLine

Constructor Summary

Constructors

Constructor	Description
SQLNullExpr()
SQLNullExpr(SQLObject parent)

Method Summary

Modifier and Type	Method	Description
protected void	accept0(SQLASTVisitor visitor)
SQLNullExpr	clone()
boolean	equals(Object o)
List	getChildren()
Object	getValue()
int	hashCode()
void	output(Appendable buf)

Methods inherited from class com.alibaba.druid.sql.ast.SQLExprImpl

computeDataType

Methods inherited from class com.alibaba.druid.sql.ast.SQLObjectImpl

accept, acceptChild, acceptChild, addAfterComment, addAfterComment, addBeforeComment, addBeforeComment, containsAttribute, getAfterCommentsDirect, getAttribute, getAttributes, getAttributesDirect, getBeforeCommentsDirect, getHint, getParent, getSourceColumn, getSourceLine, hasAfterComment, hasBeforeComment, output, putAttribute, setHint, setParent, setSourceColumn, setSourceLine, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.alibaba.druid.sql.ast.SQLExpr

computeDataType, getHint

Methods inherited from interface com.alibaba.druid.sql.ast.SQLObject

accept, addAfterComment, addAfterComment, addBeforeComment, addBeforeComment, containsAttribute, getAfterCommentsDirect, getAttribute, getAttributes, getAttributesDirect, getBeforeCommentsDirect, getParent, hasAfterComment, hasBeforeComment, output, putAttribute, setParent

Constructor Details

SQLNullExpr

public SQLNullExpr()

SQLNullExpr

public SQLNullExpr(SQLObject parent)

Method Details

output

public void output(Appendable buf)

Specified by:

output in interface SQLObject

Overrides:

output in class SQLObjectImpl

accept0

protected void accept0(SQLASTVisitor visitor)

Specified by:

accept0 in class SQLObjectImpl

hashCode

public int hashCode()

Specified by:

hashCode in class SQLExprImpl

equals

public boolean equals(Object o)

Specified by:

equals in class SQLExprImpl

getValue

public Object getValue()

Specified by:

getValue in interface SQLValuableExpr

clone

public SQLNullExpr clone()

Specified by:

clone in interface SQLExpr

Specified by:

clone in interface SQLLiteralExpr

Specified by:

clone in interface SQLObject

Specified by:

clone in class SQLExprImpl

getChildren

public List getChildren()

Specified by:

getChildren in interface SQLExpr

Overrides:

getChildren in class SQLExprImpl