Re: [configuration] Character position of key in file
Thanks for the detailed suggestions, Oliver. I appreciate it. I'll dig around a bit and give it some thought; you've given me a good head start. All the best, Greg On 11/15/2016 03:35 PM, Oliver Heger wrote: Hi Greg, Am 14.11.2016 um 22:34 schrieb Greg Torrance: Thanks Oliver. Regarding the Configuration API, is it possible to replace not just values but keys, too? For example, could I replace with Some Value If so, can you suggest what class to look at first (for accomplishing this)? This is indeed a tough one. There are multiple options, but I am not sure whether they fully cover your use case; you will certainly need some experiments: - With the high-level API (offered by Configuration) you can delete the key to be replaced and then use the addNodes() method to insert a nodes structure as replacement. The tricky part is to get the key for addNodes() right, so the replacement goes to the desired position. The configuration's expression engine may help you here. It has methods to query for keys (and receive matching node objects) and to obtain a canonical key for a given node. - You may also operate on the hierarchical configuration's node structure directly. The root node can be queried via the node model getNodeModel()). As this structure is immutable, you cannot directly change it, but you have to create a copy which might not be that efficient. - Unfortunately, XMLConfiguration has no direct hooks to manipulate the node creation process. There are some helper methods, but these are private. The use case is interesting. It would be good to offer some generic support for configuration pre-processing, independent on a concrete implementation. However, this is probably not easy to implement, and it may still be insufficient for specific use cases. Oliver Thanks, Greg On 11/14/2016 04:27 PM, Oliver Heger wrote: Hi Greg, Am 14.11.2016 um 19:01 schrieb Greg Torrance: I hope I'm not asking too many questions... I wonder if it is possible to determine the character/byte position of a particular key in a configuration file? No, the original position from where data is read is not stored in the resulting configuration. My intent is to do a pre-pass of an XML configuration file in which certain configuration keys/values are replaced by other keys/values. Once that is done the file will be reloaded. I realize this is possible outside of Commons Configuration, but I was wondering if there is a "hook" in the tool that might help simplify the process. But wouldn't it be easier to do this with the Configuration API? Load the configuration, iterate over its keys, replace data as appropriate and save the result? Oliver Thanks, Greg - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [configuration] Character position of key in file
Hi Greg, Am 14.11.2016 um 22:34 schrieb Greg Torrance: > Thanks Oliver. > > Regarding the Configuration API, is it possible to replace not just > values but keys, too? For example, could I replace > > > > with > > > > Some Value > > > > If so, can you suggest what class to look at first (for accomplishing > this)? This is indeed a tough one. There are multiple options, but I am not sure whether they fully cover your use case; you will certainly need some experiments: - With the high-level API (offered by Configuration) you can delete the key to be replaced and then use the addNodes() method to insert a nodes structure as replacement. The tricky part is to get the key for addNodes() right, so the replacement goes to the desired position. The configuration's expression engine may help you here. It has methods to query for keys (and receive matching node objects) and to obtain a canonical key for a given node. - You may also operate on the hierarchical configuration's node structure directly. The root node can be queried via the node model getNodeModel()). As this structure is immutable, you cannot directly change it, but you have to create a copy which might not be that efficient. - Unfortunately, XMLConfiguration has no direct hooks to manipulate the node creation process. There are some helper methods, but these are private. The use case is interesting. It would be good to offer some generic support for configuration pre-processing, independent on a concrete implementation. However, this is probably not easy to implement, and it may still be insufficient for specific use cases. Oliver > > Thanks, > Greg > > On 11/14/2016 04:27 PM, Oliver Heger wrote: >> Hi Greg, >> >> Am 14.11.2016 um 19:01 schrieb Greg Torrance: >>> I hope I'm not asking too many questions... >>> >>> I wonder if it is possible to determine the character/byte position >>> of a particular key in a configuration file? >> No, the original position from where data is read is not stored in the >> resulting configuration. >> >>> My intent is to do a pre-pass of an XML configuration file in which >>> certain configuration keys/values are replaced by other keys/values. >>> Once that is done the file will be reloaded. I realize this is >>> possible outside of Commons Configuration, but I was wondering if >>> there is a "hook" in the tool that might help simplify the process. >>> >> But wouldn't it be easier to do this with the Configuration API? Load >> the configuration, iterate over its keys, replace data as appropriate >> and save the result? >> >> Oliver >> >>> Thanks, >>> Greg >>> >> - >> To unsubscribe, e-mail: user-unsubscr...@commons.apache.org >> For additional commands, e-mail: user-h...@commons.apache.org >> >> > > > - > To unsubscribe, e-mail: user-unsubscr...@commons.apache.org > For additional commands, e-mail: user-h...@commons.apache.org > - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [configuration] Character position of key in file
Thanks Oliver. Regarding the Configuration API, is it possible to replace not just values but keys, too? For example, could I replace with Some Value If so, can you suggest what class to look at first (for accomplishing this)? Thanks, Greg On 11/14/2016 04:27 PM, Oliver Heger wrote: Hi Greg, Am 14.11.2016 um 19:01 schrieb Greg Torrance: I hope I'm not asking too many questions... I wonder if it is possible to determine the character/byte position of a particular key in a configuration file? No, the original position from where data is read is not stored in the resulting configuration. My intent is to do a pre-pass of an XML configuration file in which certain configuration keys/values are replaced by other keys/values. Once that is done the file will be reloaded. I realize this is possible outside of Commons Configuration, but I was wondering if there is a "hook" in the tool that might help simplify the process. But wouldn't it be easier to do this with the Configuration API? Load the configuration, iterate over its keys, replace data as appropriate and save the result? Oliver Thanks, Greg - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [configuration] Character position of key in file
Hi Greg, Am 14.11.2016 um 19:01 schrieb Greg Torrance: > I hope I'm not asking too many questions... > > I wonder if it is possible to determine the character/byte position of a > particular key in a configuration file? No, the original position from where data is read is not stored in the resulting configuration. > > My intent is to do a pre-pass of an XML configuration file in which certain > configuration keys/values are replaced by other keys/values. Once that is > done the file will be reloaded. I realize this is possible outside of Commons > Configuration, but I was wondering if there is a "hook" in the tool that > might help simplify the process. > But wouldn't it be easier to do this with the Configuration API? Load the configuration, iterate over its keys, replace data as appropriate and save the result? Oliver > Thanks, > Greg > - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
