# 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 ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://trillo.gitbook.io/trillo-workbench-java-sdk/meta-api-metaapi/retrieve-apis.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.