Class AbstractExpression
- java.lang.Object
-
- com.inductiveautomation.ignition.common.expressions.AbstractExpression
-
- All Implemented Interfaces:
Expression
- Direct Known Subclasses:
AbstractAlertExpressionContext.AlertVariableExpression
,ArithmeticExpression
,BitwiseExpression
,BitwiseNot
,BoundPropertyExpression
,BoundPropertyExpression
,BoundTagExpression
,BoundVariableExpression
,ComparisonExpression
,EqualityExpression
,FunctionExpression
,LikeExpression
,LogicalExpression
,NonLocalizedToStringExpression
,NotExpression
,PropertyBasedExpressionParseContext.PropertyReferenceExpression
,SubscriptExpression
,TagPathReadExpression
,TagReferenceBinder.SubscribedTagExpression
,TagReferenceBinder.TagReadExpression
,ToStringExpression
,UMinusExpression
public abstract class AbstractExpression extends java.lang.Object implements Expression
-
-
Field Summary
Fields Modifier and Type Field Description protected Expression[]
children
protected CommonContext
context
protected InteractionListener
updateListener
-
Constructor Summary
Constructors Constructor Description AbstractExpression()
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
connect(CommonContext context, InteractionListener updateListener)
Gives the expression a chance to connect itself to things, if necessary.void
disconnect()
Tells the expression to disconnect from anything it was connected to.Expression[]
getChildren()
The children (if any) that this expression is dependent on for its executionvoid
setChildren(Expression[] expressions)
void
shutdown()
Tells the expression to shutdown any polling operations.void
startup()
Tells the expression to startup any polling operations.-
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
execute, getOpName, getType
-
-
-
-
Field Detail
-
children
protected Expression[] children
-
context
protected transient CommonContext context
-
updateListener
protected InteractionListener updateListener
-
-
Method Detail
-
getChildren
public Expression[] getChildren()
Description copied from interface:Expression
The children (if any) that this expression is dependent on for its execution- Specified by:
getChildren
in interfaceExpression
-
setChildren
public void setChildren(Expression[] expressions)
-
connect
public void connect(CommonContext context, InteractionListener updateListener)
Description copied from interface:Expression
Gives the expression a chance to connect itself to things, if necessary. Most expressions do not have any connections. An expression should notify the updateListener if they change.- Specified by:
connect
in interfaceExpression
-
disconnect
public void disconnect()
Description copied from interface:Expression
Tells the expression to disconnect from anything it was connected to.- Specified by:
disconnect
in interfaceExpression
-
shutdown
public void shutdown()
Description copied from interface:Expression
Tells the expression to shutdown any polling operations.- Specified by:
shutdown
in interfaceExpression
-
startup
public void startup()
Description copied from interface:Expression
Tells the expression to startup any polling operations. Expressions that use this can remember the updateListener from connect() to feed update notification to.- Specified by:
startup
in interfaceExpression
-
-