org.apache.uima.resource
Interface ConfigurableResource

All Superinterfaces:

Resource

All Known Subinterfaces:

AnalysisEngine, CasConsumer, CasDataConsumer, CasDataInitializer, CasInitializer, CollectionReader, TextAnalysisEngine

All Known Implementing Classes:

CasConsumer_ImplBase, CasDataCollectionReader_ImplBase, CasDataConsumer_ImplBase, CasDataInitializer_ImplBase, CasInitializer_ImplBase, CollectionReader_ImplBase, ConfigurableResource_ImplBase

public interface ConfigurableResource
extends Resource

A Resource that has configuration parameters that can be changed after the Resource has been instantiated.

To set configuration parameters, call the setConfigParameterValue(String,String,Object) method for each parameter that is to be set, and then call the reconfigure() method to cause the Resource to re-read its configuration settings.

Note that if the Resource attempts to access its configuration settings between the call to setConfigParameterValue and the call to reconfigure, it may retrieve either the old value or the new value. This decision is left to the framework's ConfigurationManager implementation.

Field Summary

Fields inherited from interface org.apache.uima.resource.Resource

PARAM_AGGREGATE_SOFA_MAPPINGS, PARAM_CONFIG_PARAM_SETTINGS, PARAM_PERFORMANCE_TUNING_SETTINGS, PARAM_RESOURCE_MANAGER, PARAM_UIMA_CONTEXT

Method Summary

Object	getConfigParameterValue(String aParamName) Looks up the value of a configuration parameter.
Object	getConfigParameterValue(String aGroupName, String aParamName) Looks up the value of a configuration parameter in a group.
void	reconfigure() Instructs this Resource to re-read its configuration parameter settings.
void	setConfigParameterValue(String aParamName, Object aValue) Sets the value of a configuration parameter.
void	setConfigParameterValue(String aGroupName, String aParamName, Object aValue) Sets the value of a configuration parameter in a group.

Methods inherited from interface org.apache.uima.resource.Resource

destroy, getLogger, getMetaData, getResourceManager, getUimaContext, getUimaContextAdmin, initialize, setLogger

Method Detail

getConfigParameterValue

Object getConfigParameterValue(String aParamName)

Looks up the value of a configuration parameter. This method will only return the value of a parameter that is not defined in any group.

This method returns null if the parameter is optional and has not been assigned a value. (For mandatory parameters, an exception is thrown during initialization if no value has been assigned.) This method also returns null if there is no declared configuration parameter with the specified name.

Parameters:

aParamName - the name of a parameter that is not in any group

Returns:

the value of the parameter with name aParamName, null is either the parameter does not exist or it has not been assigned a value.

getConfigParameterValue

Object getConfigParameterValue(String aGroupName,
                               String aParamName)

Looks up the value of a configuration parameter in a group. If the parameter has no value assigned within the group, fallback strategies will be followed.

This method returns null if the parameter is optional and has not been assigned a value. (For mandatory parameters, an exception is thrown during initialization if no value has been assigned.) This method also returns null if there is no declared configuration parameter with the specified name.

Parameters:

aGroupName - the name of a configuration group. If the group name is null, this method will return the same value as getParameterValue(String).

aParamName - the name of a parameter in the group

Returns:

the value of the parameter in group aGroupName with name aParamName,,null is either the parameter does not exist or it has not been assigned a value.

setConfigParameterValue

void setConfigParameterValue(String aParamName,
                             Object aValue)

Sets the value of a configuration parameter. This only works for a parameter that is not defined in any group. Note that there is no guarantee that the change will take effect until reconfigure() is called.

Parameters:

aParamName - the name of a parameter that is not in any group

aValue - the value to assign to the parameter

setConfigParameterValue

void setConfigParameterValue(String aGroupName,
                             String aParamName,
                             Object aValue)

Sets the value of a configuration parameter in a group. Note that there is no guarantee that the change will take effect until reconfigure() is called.

Parameters:

aGroupName - the name of a configuration group. If this parameter is null, this method will have the same effet as setParameterValue(String,Object).

aParamName - the name of a parameter in the group

aValue - the value to assign to the parameter.

reconfigure

void reconfigure()
                 throws ResourceConfigurationException

Instructs this Resource to re-read its configuration parameter settings.

Throws:

ResourceConfigurationException - if the configuration is not valid