> For the complete documentation index, see [llms.txt](https://trillo.gitbook.io/trillo-workbench-java-sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trillo.gitbook.io/trillo-workbench-java-sdk/meta-api-metaapi/retrieve-apis.md). # All Retrieve-Only ## getAppDataDir Locate and get the application data directory ``` MetaApi.getAppDataDir() ``` **Parameters** ``` no parameters. ``` **Returns** ``` application data directory​ ``` ## getClassM Get the object representing the class​ ``` MetaApi.getClassM(String className) ``` Parameters ``` className: name of the class ``` Returns ``` the object representing the class​ ``` ## getSchemaForDataStudio Get class schema​ for the data studio ``` MetaApi.getSchemaForDataStudio(String className, boolean includeAllSysAttrs) ``` **Parameters** ``` className: name of the class includeAllSysAttrs: include all system attributes ``` **Returns** ``` the schema object​ for the data studio ``` ## getDomainFileAsMap get domain file as a hashmap.​ ``` MetaApi.getDomainFileAsMap(String fileName) ``` **Parameters** ``` fileName: name of the file ``` **Returns** ``` hashmap of the file​ ``` ## getMetadata get metadata from id ``` MetaApi.getMetadata(String id) or MetaApi.getMetadata(String modelClassName, String folder, String name) ``` **Parameters** ``` id ``` **Returns** ``` Object ``` ## getClasses get classes ``` MetaApi.getClasses(String filter) or MetaApi.getClasses(String dsName, String filter) or MetaApi.getClasses(String dsName, String schemaName, String filter) or MetaApi.getClasses(String appName, String dsName, String schemaName, String filter) ``` **Parameters** ``` filter dsName schemaName appName ``` **Returns** ``` Object ``` ## getClassNames get classes ``` MetaApi.getClassNames(String filter) or MetaApi.getClassNames(String dsName, String filter) or MetaApi.getClassNames(String dsName, String schemaName, String filter) or MetaApi. getClassNames(String appName, String dsName, String schemaName, String filter) ``` **Parameters** ``` filter dsName schemaName appName ``` **Returns** ``` List ``` ## getDataSourceNames get data source names ``` MetaApi.getDataSourceNames(String filter) or MetaApi.getDataSourceNames(String appName, String filter) ``` **Parameters** ``` filter appName ``` **Returns** ``` List ``` ## getDataSources get data sources ``` MetaApi.getDataSources(String filter) or MetaApi.getDataSources(String appName, String filter) ``` **Parameters** ``` filter appName ``` **Returns** ``` List ```