org.formaria.aria.data
Class DataBinding

java.lang.Object
  org.formaria.aria.data.DataBinding

Direct Known Subclasses:

EditorDataBinding, ImageBinding, LabelBinding, ListBinding, ListTableBinding, RadioBinding, StateBinding, TableTableBinding, TextBinding, TreeBinding, TreeBinding, ValueBinding

public abstract class DataBinding
extends java.lang.Object

Describes an interface used to allow components to be updated when a data model changes and to allow the model to be updated when the user interface elements change.

Copyright: Copyright (c) Formaria Ltd., 2008
License: see license.txt

Field Summary

protected java.lang.Object	component
protected Project	currentProject
static java.lang.String	DEFAULT_OUTPUT_PATH The path to which Aria state information will be output
protected DataModel	outputModel
protected java.lang.String	outputPath
protected boolean	reevaluate
protected DataModel	sourceModel
protected java.lang.String	sourcePath

Constructor Summary

DataBinding()

Method Summary

abstract void	get() Update the bound component with the value obtained from the data model.
java.util.Vector	getAttributes(boolean required) Get the names of the attributes used by this binding class
protected java.util.Vector	getAttributes(boolean required, java.lang.String[] extraAttribNames) Get the names of the attributes used by this binding class
java.lang.Object	getComponent() Get the component to which this binding is attached
DataModel	getOutput() Get the output model
java.lang.String	getOutputPath() Get the model path for the output/state data
boolean	getReevaluate() Get the reevaluate flag.
DataModel	getSource() Get the source model
java.lang.String	getSourcePath() Get the model path for the source data
abstract java.lang.String	getType() Get the type of this binding
abstract void	set() Update the data model with the value retrieved from the bound component.
void	setOutput(DataModel newNode, java.lang.String path) Update the path values stored by this node.
void	setOutputPath(java.lang.String newPath) Set the model path for the output/state data
void	setReevaluate(boolean b) Set the reevaluate flag.
void	setSource(DataModel newNode) Set the source node for data in the model
void	setSourcePath(java.lang.String newPath) Set the model path for the source data
abstract void	setup(Project project, java.lang.Object c, java.util.Hashtable bindingConfig, java.util.Hashtable instanceConfig) Setup and configure the binding instance.
protected void	setupHelper(Project project, java.lang.Object c, java.util.Hashtable bindingConfig, java.util.Hashtable instanceConfig) A helper designed to be called by the constructor of each binding to store the common parameters.

Methods inherited from class java.lang.Object

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

Field Detail

currentProject

protected Project currentProject

component

protected java.lang.Object component

sourcePath

protected java.lang.String sourcePath

outputPath

protected java.lang.String outputPath

sourceModel

protected DataModel sourceModel

outputModel

protected DataModel outputModel

reevaluate

protected boolean reevaluate

DEFAULT_OUTPUT_PATH

public static final java.lang.String DEFAULT_OUTPUT_PATH

The path to which Aria state information will be output

See Also:

Constant Field Values

Constructor Detail

DataBinding

public DataBinding()

Method Detail

setup

public abstract void setup(Project project,
                           java.lang.Object c,
                           java.util.Hashtable bindingConfig,
                           java.util.Hashtable instanceConfig)

Setup and configure the binding instance. The binding is configured via the XML setup registered for the particular binding type and then, subsequently by attibitional attributes of the binding instance specified in the page declaration, for the individual binding instance. The binding may also obtain configuration or reference information from the component and the project.

Parameters:

project - the owning project

c - the component being bound

bindingConfig - the XML element which contains the binding configuration

instanceConfig - the XML element which contains the setup attributes of the binding instance

setupHelper

protected void setupHelper(Project project,
                           java.lang.Object c,
                           java.util.Hashtable bindingConfig,
                           java.util.Hashtable instanceConfig)

A helper designed to be called by the constructor of each binding to store the common parameters.

Parameters:

project - the owning project

c - the component being bound

bindingConfig - the XML element which contains the binding configuration

instanceConfig - the XML element which contains the setup attributes of the binding instance

get

public abstract void get()

Update the bound component with the value obtained from the data model.

set

public abstract void set()

Update the data model with the value retrieved from the bound component.

getComponent

public java.lang.Object getComponent()

Get the component to which this binding is attached

Returns:

The component which is being bound

getSourcePath

public java.lang.String getSourcePath()

Get the model path for the source data

Returns:

The raw path to which the source model is bound

getOutputPath

public java.lang.String getOutputPath()

Get the model path for the output/state data

Returns:

The raw path to which the output model is bound

setSource

public void setSource(DataModel newNode)

Set the source node for data in the model

Parameters:

newNode - the path of the data in the model

setOutput

public void setOutput(DataModel newNode,
                      java.lang.String path)

Update the path values stored by this node. The output path is used to store selection data and state.

Parameters:

newNode - the new model for saving the output data

path - The path to which the outputModel is writing.

getSource

public DataModel getSource()

Get the source model

Returns:

the model node

getOutput

public DataModel getOutput()

Get the output model

Returns:

the model node

setSourcePath

public void setSourcePath(java.lang.String newPath)

Set the model path for the source data

Parameters:

newPath - The path to which the source model is to be bound

setOutputPath

public void setOutputPath(java.lang.String newPath)

Set the model path for the output/state data

Parameters:

newPath - The path to which the output model is to be bound

getReevaluate

public boolean getReevaluate()

Get the reevaluate flag. The reevaluate flag controls whether or not the binding paths are revaluated when a page is displayed/redisplayed. By default the value is true. A binding can optionally specify a 'reeval' attribute to control the setting.

Returns:

true if the binding paths are to be reevaluated

setReevaluate

public void setReevaluate(boolean b)

Set the reevaluate flag. The reevaluate flag controls whether or not the binding paths are revaluated when a page is displayed/redisplayed. By default the value is true. A binding can optionally specify a 'reeval' attribute to control the setting.

Parameters:

b - true if the binding paths are to be reevaluated

getAttributes

public java.util.Vector getAttributes(boolean required)

Get the names of the attributes used by this binding class

Parameters:

required - true to list only the require attribues, false for all attributes

getAttributes

protected java.util.Vector getAttributes(boolean required,
                                         java.lang.String[] extraAttribNames)

Get the names of the attributes used by this binding class

Parameters:

required - true to list only the require attribues, false for all attributes

extraAttribNames - the extra attribute names to add to the vector

getType

public abstract java.lang.String getType()

Get the type of this binding

Returns:

the binding type name