Package com.inductiveautomation.ignition.common.expressions

Class ComparisonExpression

java.lang.Object

com.inductiveautomation.ignition.common.expressions.AbstractExpression

com.inductiveautomation.ignition.common.expressions.ComparisonExpression

All Implemented Interfaces:

Expression

public class ComparisonExpression
extends AbstractExpression

Field Summary

Fields

Modifier and Type	Field	Description
static final int	GREATER
static final int	GT_EQ
static final int	LESS
static final int	LT_EQ

Fields inherited from class com.inductiveautomation.ignition.common.expressions.AbstractExpression

children, context, updateListener

Constructor Summary

Constructors

Constructor	Description
ComparisonExpression()
ComparisonExpression(Expression e1, Expression e2, int opType)

Method Summary

Modifier and Type	Method	Description
@NonNull QualifiedValue	execute()	Compute and return the value of this expression.
String	getOpName()	Return a human-readable name for the operation that this expression performs.
int	getOpType()
Class<?>	getType()	Return the type that this expression will return.
void	setOpType(int i)

Methods inherited from class com.inductiveautomation.ignition.common.expressions.AbstractExpression

connect, disconnect, getChildren, setChildren, shutdown, startup

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

GREATER

public static final int GREATER

See Also:

• Constant Field Values

LESS

public static final int LESS

See Also:

• Constant Field Values

GT_EQ

public static final int GT_EQ

See Also:

• Constant Field Values

LT_EQ

public static final int LT_EQ

See Also:

• Constant Field Values

Constructor Details

ComparisonExpression

public ComparisonExpression(Expression e1,
 Expression e2,
 int opType)

ComparisonExpression

public ComparisonExpression()

Method Details

execute

public @NonNull QualifiedValue execute()
                                throws ExpressionException

Description copied from interface: Expression

Compute and return the value of this expression.

Returns:

the result of the expression evaluation as a QualifiedValue

Throws:

ExpressionException - if an error occurs during execution

getType

public Class<?> getType()

Description copied from interface: Expression

Return the type that this expression will return.

Returns:

the Class of the value returned by Expression.execute()

getOpName

public String getOpName()

Description copied from interface: Expression

Return a human-readable name for the operation that this expression performs.

Returns:

the operation name

getOpType

public int getOpType()

setOpType

public void setOpType(int i)