Hello, This is the summary of the implementation. (Included in Pull Request message as well)
*Update Index Query* The update-index query takes two arguments, collection directory and index directory. It shares some of the functionalities from build-index-on-collection query so, some changes were done to the following classes in order to use them in updating index process and to maximize code reuse 1. IndexConstructorUtil.java : Created a new function to get an instance of IndexDocumentBuilder which can be used in IndexUpdater.java class. 2. IndexDocumentBuilder.java : Added a new string filed containing the corresponding file path which is needed to retrieve a document related to an XML file. *Metadata handling* Here a POJO is created to properly manage the metadata for a file. (XmlMetadata.java) Currently it contains following fields. 1. File path 2. File Name (Not used) 3. Checksum String When storing metadata, a HashMap is created with file path as the key and XmlMetadata object. This map is then serialized and written to a file named metadata.file and stored in the same directory where the index is stored. *Update Index process* - If a file is detected as modified, the current index document related to that file is deleted and newly created index document is added. - If a new file is detected, a new index document will be created and added to the existing index. - If the file is deleted, delete the index document related to that file. - After every task, update the metadata object and after all processes completed, write the new metadata map to the file. Please review the pull request and merge. https://github.com/apache/vxquery/pull/62 Thank you Menaka -- *Menaka Madushanka Jayawardena* Faculty of Engineering, <http://www.pdn.ac.lk/eng> University of Peradeniyaya. LinkedIn <http://lk.linkedin.com/in/menakajayawardena> TP:- 071 885 1183/ 071 350 5470
