org.springframework.webflow.engine.model.builder
Class DefaultFlowModelHolder

java.lang.Object
  org.springframework.webflow.engine.model.builder.DefaultFlowModelHolder

All Implemented Interfaces:

FlowModelHolder

public class DefaultFlowModelHolder
extends java.lang.Object
implements FlowModelHolder

A flow model holder that can detect changes on an underlying flow model resource and refresh that resource automatically.

This class is thread-safe.

Note that this FlowModel holder uses a FlowModelBuilder.

Author:

Keith Donald, Scott Andrews

See Also:

FlowModel

Constructor Summary

DefaultFlowModelHolder(FlowModelBuilder flowModelBuilder)
Creates a new refreshable flow model holder that uses the configured assembler (GOF director) to drive flow assembly, on initial use and on any resource change or refresh.

Method Summary

FlowModel	getFlowModel() Returns the flow model held by this holder.
org.springframework.core.io.Resource	getFlowModelResource() Returns the underlying resource defining the flow model.
boolean	hasFlowModelChanged() Has the underlying flow model changed since it was last accessed via a call to FlowModelHolder.getFlowModel().
void	refresh() Refresh the flow model held by this holder.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultFlowModelHolder

public DefaultFlowModelHolder(FlowModelBuilder flowModelBuilder)

Creates a new refreshable flow model holder that uses the configured assembler (GOF director) to drive flow assembly, on initial use and on any resource change or refresh.

Parameters:

flowModelBuilder - the flow model builder to use

Method Detail

getFlowModel

public FlowModel getFlowModel()

Description copied from interface: FlowModelHolder

Returns the flow model held by this holder. Calling this method the first time may trigger flow model assembly.

Specified by:

getFlowModel in interface FlowModelHolder

getFlowModelResource

public org.springframework.core.io.Resource getFlowModelResource()

Description copied from interface: FlowModelHolder

Returns the underlying resource defining the flow model.

Specified by:

getFlowModelResource in interface FlowModelHolder

Returns:

the flow model resource

hasFlowModelChanged

public boolean hasFlowModelChanged()

Description copied from interface: FlowModelHolder

Has the underlying flow model changed since it was last accessed via a call to FlowModelHolder.getFlowModel().

Specified by:

hasFlowModelChanged in interface FlowModelHolder

Returns:

true if yes, false if not

refresh

public void refresh()

Description copied from interface: FlowModelHolder

Refresh the flow model held by this holder. Calling this method typically triggers flow re-assembly, which may include a refresh from an externalized resource such as a file.

Specified by:

refresh in interface FlowModelHolder

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object