Package com.inductiveautomation.ignition.common.expressions

Class TagPathReadExpression

java.lang.Object

com.inductiveautomation.ignition.common.expressions.AbstractExpression

com.inductiveautomation.ignition.common.expressions.TagPathReadExpression

All Implemented Interfaces:

Expression

public class TagPathReadExpression
extends AbstractExpression

A general purpose expression that can read a tag path from a generic reader function.

Field Summary

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

children, context, updateListener

Constructor Summary

Constructors

Constructor	Description
TagPathReadExpression(TagPath path, Function<TagPath,QualifiedValue> reader)

Method Summary

Modifier and Type	Method	Description
QualifiedValue	execute()	Compute and return the value of this expression
String	getOpName()	Return a human-readable name for the operation that this expression performs

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

Methods inherited from interface com.inductiveautomation.ignition.common.expressions.Expression

getType

Constructor Details

TagPathReadExpression

public TagPathReadExpression(TagPath path,
 Function<TagPath,QualifiedValue> reader)

Method Details

execute

@Nonnull
public QualifiedValue execute()
                       throws ExpressionException

Description copied from interface: Expression

Compute and return the value of this expression

Throws:

ExpressionException

getOpName

public String getOpName()

Description copied from interface: Expression

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