THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
Apache MetaModel is a library that encapsulates the differences and enhances the capabilities of different datastores. Rich querying abilities are offered to datastores that do not otherwise support advanced querying and a unified view of the datastore structure is offered through a single model of the schemas, tables, columns and relationships.
Key concepts:
- DataContext
- Query object and , the QueryBuilder API and Query parsing
- UpdateableDataContext
- UpdateScript UpdateScript (and BatchUpdateScript)
Knowledge base and background information
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Building new connectors - Getting started
Details about Connectors / DataContext implementations:
| Datastore type | DataContext class name | Properties "type" value | Variants supported/available |
| JdbcDataContext | jdbc | PostgreSQL, MySQL, Microsoft SQL Server, Oracle DB, IBM DB2 | |
| CsvDataContext | csv | Comma-separated | |
| Fixed width value files | FixedWidthDataContext | fixed-width | Fixed width |
| Microsoft Excel spreadsheets | ExcelDataContext | excel | .xls |
| Microsoft Access database files | AccessDataContext | - | .mdb |
| OpenOffice.org database files | OpenOfficeDataContext | - | .odb |
| XML files | XmlDomDataContext XmlSaxDataContext | xml | DOM-based parsing (all in-memory) |
| JSON files | JsonDataContext | json | |
| ElasticSearch | ElasticSearchDataContext | elasticsearch | Native Java API |
| MongoDB | MongoDbDataContext | - | MongoDB 2.x MongoDB 3.x |
| Apache CouchDB | CouchDbDataContext |
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| couchdb | |||
| Apache Cassandra | CassandraDataContext | cassandra | |
| Apache HBase | HBaseDataContext | hbase | |
| Apache Kafka | KafkaDataContext | ||
| Neo4j | Neo4jDataContext | - | |
| Salesforce.com | SalesforceDataContext | salesforce | |
| SugarCRM |
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| SugarCrmDataContext | - | ||
| Java collections | PojoDataContext | pojo |
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| Collections of other datastores | CompositeDataContext |
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Additional information for the interested:
Blogs and presentations - external readings, presentations, videos etc. about Apache MetaModel
Data type conversion
'MetaModel extras ' - third party modules built on top of Apache MetaModel
Migrating from (legacy) eobjects.org MetaModel to Apache MetaModel
- Release Guide