org.epics.pvmanager.expression

Class WriteExpressionImpl<W>

java.lang.Object

org.epics.pvmanager.expression.WriteExpressionListImpl<W>

org.epics.pvmanager.expression.WriteExpressionImpl<W>

Type Parameters:

W - type of the write payload

All Implemented Interfaces:

WriteExpression<W>, WriteExpressionList<W>

Direct Known Subclasses:

WriteMap

public class WriteExpressionImpl<W>
extends WriteExpressionListImpl<W>
implements WriteExpression<W>

Implementation class for WriteExpression.

Author:

carcassi

Constructor Summary

Constructors

Constructor and Description
WriteExpressionImpl(String channelName) Constructor that represents a single channel of a particular type.
WriteExpressionImpl(WriteExpressionList<?> childExpressions, WriteFunction<W> function, String defaultName) Creates a new write expression.

Method Summary

Methods

Modifier and Type	Method and Description
WriteExpression<W>	as(String name) Changes the name for this expression
void	fillWriteRecipe(PVWriterDirector director, WriteRecipeBuilder builder) Prepares the recipe to connect the channels needed by this expression.
String	getName() Name representation of the expression.
WriteExpressionImpl<W>	getWriteExpressionImpl() The implementation of this expression.
WriteFunction<W>	getWriteFunction() Returns the function represented by this expression.

Methods inherited from class org.epics.pvmanager.expression.WriteExpressionListImpl

and, getWriteExpressions

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.epics.pvmanager.expression.WriteExpressionList

and, getWriteExpressions

Constructor Detail

WriteExpressionImpl

public WriteExpressionImpl(String channelName)

Constructor that represents a single channel of a particular type.

Parameters:

channelName - the name of the channel

WriteExpressionImpl

public WriteExpressionImpl(WriteExpressionList<?> childExpressions,
                   WriteFunction<W> function,
                   String defaultName)

Creates a new write expression.

Parameters:

childExpressions - the expressions used as arguments by this expression

function - the function that will decompose the payload for this expression

defaultName - the name for this expression

Method Detail

as

public final WriteExpression<W> as(String name)

Changes the name for this expression

Parameters:

name - new name

Returns:

this

getName

public final String getName()

Name representation of the expression.

Specified by:

getName in interface WriteExpression<W>

Returns:

a name

getWriteFunction

public final WriteFunction<W> getWriteFunction()

Returns the function represented by this expression.

Specified by:

getWriteFunction in interface WriteExpression<W>

Returns:

the function

fillWriteRecipe

public void fillWriteRecipe(PVWriterDirector director,
                   WriteRecipeBuilder builder)

Description copied from interface: WriteExpression

Prepares the recipe to connect the channels needed by this expression.

A dynamic expression, one for which the child expressions can change, can keep a reference to the director to connect/disconnect new child expressions.

Specified by:

fillWriteRecipe in interface WriteExpression<W>

Parameters:

director - the director for the reader

builder - the recipe to fill

getWriteExpressionImpl

public final WriteExpressionImpl<W> getWriteExpressionImpl()

Description copied from interface: WriteExpression

The implementation of this expression.

Specified by:

getWriteExpressionImpl in interface WriteExpression<W>

Returns:

the implementation