org.teiid.query.sql.proc

Class AssignmentStatement

java.lang.Object

org.teiid.query.sql.proc.Statement

org.teiid.query.sql.proc.AssignmentStatement

All Implemented Interfaces:

Cloneable, LanguageObject, ExpressionStatement

Direct Known Subclasses:

DeclareStatement, ReturnStatement

public class AssignmentStatement
extends Statement
implements ExpressionStatement

This class represents an assignment statement in the storedprocedure language. It extends the Statement that could part of a Block. This statement holds references to the variable and it's value which could be an Expression or a Command.

Nested Class Summary

Nested classes/interfaces inherited from class org.teiid.query.sql.proc.Statement

Statement.Labeled

Nested classes/interfaces inherited from interface org.teiid.query.sql.LanguageObject

LanguageObject.Util

Field Summary

Fields inherited from class org.teiid.query.sql.proc.Statement

TYPE_ASSIGNMENT, TYPE_BREAK, TYPE_COMMAND, TYPE_COMPOUND, TYPE_CONTINUE, TYPE_DECLARE, TYPE_ERROR, TYPE_IF, TYPE_LEAVE, TYPE_LOOP, TYPE_RETURN, TYPE_UNKNOWN, TYPE_UPDATE, TYPE_WHILE

Constructor Summary

Constructors

Constructor and Description
AssignmentStatement() Constructor for AssignmentStatement.
AssignmentStatement(ElementSymbol variable, Command value) Deprecated.
AssignmentStatement(ElementSymbol variable, Expression value)
AssignmentStatement(ElementSymbol variable, QueryCommand value)

Method Summary

Modifier and Type	Method and Description
void	acceptVisitor(LanguageVisitor visitor) Method for accepting a visitor.
Object	clone() Deep clone statement to produce a new identical statement.
boolean	equals(Object obj) Compare two AssignmentStatements for equality.
Command	getCommand() Deprecated.
Class<?>	getExpectedType()
Expression	getExpression()
int	getType() Return the type for this statement, this is one of the types defined on the statement object.
ElementSymbol	getVariable() Get the expression giving the value that is assigned to the variable.
int	hashCode() Get hashcode for AssignmentStatement.
void	setCommand(Command command)
void	setExpression(Expression expression)
void	setVariable(ElementSymbol variable) Set the variable that is assigned to the value

Methods inherited from class org.teiid.query.sql.proc.Statement

toString

Methods inherited from class java.lang.Object

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

Constructor Detail

AssignmentStatement

public AssignmentStatement()

Constructor for AssignmentStatement.

AssignmentStatement

public AssignmentStatement(ElementSymbol variable,
                           QueryCommand value)

AssignmentStatement

@Deprecated
public AssignmentStatement(ElementSymbol variable,
                                       Command value)

Deprecated.

AssignmentStatement

public AssignmentStatement(ElementSymbol variable,
                           Expression value)

Method Detail

getCommand

@Deprecated
public Command getCommand()

Deprecated.

setCommand

public void setCommand(Command command)

getExpression

public Expression getExpression()

Specified by:

getExpression in interface ExpressionStatement

setExpression

public void setExpression(Expression expression)

Specified by:

setExpression in interface ExpressionStatement

getVariable

public ElementSymbol getVariable()

Get the expression giving the value that is assigned to the variable.

Returns:

An Expression with the value

setVariable

public void setVariable(ElementSymbol variable)

Set the variable that is assigned to the value

getType

public int getType()

Return the type for this statement, this is one of the types defined on the statement object.

Specified by:

getType in class Statement

Returns:

The type of this statement

acceptVisitor

public void acceptVisitor(LanguageVisitor visitor)

Description copied from interface: LanguageObject

Method for accepting a visitor. It is the responsibility of the language object to call back on the visitor.

Specified by:

acceptVisitor in interface LanguageObject

Parameters:

visitor - Visitor being used

clone

public Object clone()

Deep clone statement to produce a new identical statement.

Specified by:

clone in interface LanguageObject

Specified by:

clone in class Statement

Returns:

Deep clone

equals

public boolean equals(Object obj)

Compare two AssignmentStatements for equality. They will only evaluate to equal if they are IDENTICAL: variable and its value which could be a command or an expression objects are equal.

Overrides:

equals in class Object

Parameters:

obj - Other object

Returns:

True if equal

hashCode

public int hashCode()

Get hashcode for AssignmentStatement. WARNING: This hash code relies on the hash codes of the variable and its value which could be a command or an expression.

Overrides:

hashCode in class Object

Returns:

Hash code

getExpectedType

public Class<?> getExpectedType()

Specified by:

getExpectedType in interface ExpressionStatement