Creating a Link to a File - Creating a Link to a File - Alfresco - Alfresco Content Services - Alfresco/Alfresco-Content-Services/23.4/Alfresco-Content-Services/Develop/Out-of-Process-Extension-Points/REST-API-Java-Wrapper/Managing-Folders-and-Files/Creating-a-Link-to-a-File - 23.4 - 23.4

To create a link to a file, use the createNode method of the NodesApi and create a node of the type app:filelink.

For more information about this ReST API endpoint, see Create a Link to a File.

For a description of the common parameters, such as include, see Common Parameters.

import org.alfresco.core.handler.NodesApi;
import org.alfresco.core.model.Node;
import org.alfresco.core.model.NodeBodyCreate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.util.*;

@Component
public class LinkFileCmd {
    static final Logger LOGGER = LoggerFactory.getLogger(LinkFileCmd.class);

    @Autowired
    NodesApi nodesApi;

    public void execute(String parentFolderNodeId, String linkToNodeId) throws IOException {
        Map<String, String> linkProps = new HashMap<>();
        linkProps.put("cm:destination", linkToNodeId); // Link points to this file node

        NodeBodyCreate nodeBodyCreate = new NodeBodyCreate();
        nodeBodyCreate.setName("Link to a text file");
        nodeBodyCreate.setNodeType("app:filelink"); // Out-of-the-box content model type for a file link
        nodeBodyCreate.setProperties(linkProps);

        Boolean autoRename = true;
        List<String> include = new ArrayList<>();
        List<String> fields = null;
        Boolean majorVersion = true;
        Boolean versioningEnabled = true;

        // Include the isLink property in the response so we can see if a node is a link
        include.add("isLink");

        Node fileLinkNode = nodesApi.createNode(parentFolderNodeId, nodeBodyCreate, autoRename, majorVersion,
                versioningEnabled, include, fields).getBody().getEntry();
        LOGGER.info("File link: {}", fileLinkNode);
    }
}

Executing this code would give the following result, passing in parent folder and node to link:

% java -jar target/rest-api-0.0.1-SNAPSHOT.jar link-file 7f041db0-fdb6-4185-b921-2fb9ed381480 48413f7a-066d-4e38-b2e6-c84ede635493

2021-05-04 13:27:43.981  INFO 29404 --- [           main] o.a.tutorial.restapi.RestApiApplication  : Started RestApiApplication in 4.237 seconds (JVM running for 4.904)
2021-05-04 13:27:43.983  INFO 29404 --- [           main] o.a.tutorial.restapi.RestApiApplication  : args[0]: link-file
2021-05-04 13:27:43.985  INFO 29404 --- [           main] o.a.tutorial.restapi.RestApiApplication  : args[1]: 7f041db0-fdb6-4185-b921-2fb9ed381480
2021-05-04 13:27:43.985  INFO 29404 --- [           main] o.a.tutorial.restapi.RestApiApplication  : args[2]: 48413f7a-066d-4e38-b2e6-c84ede635493
2021-05-04 13:27:44.329  INFO 29404 --- [           main] o.alfresco.tutorial.restapi.LinkFileCmd  : File link: class Node {
    id: c4ab808f-f42b-42a8-b308-d5d82df29830
    name: Link to a text file
    nodeType: app:filelink
    isFolder: false
    isFile: true
    isLocked: false
    modifiedAt: 2021-05-04T12:27:44.166Z
    modifiedByUser: class UserInfo {
        displayName: Administrator
        id: admin
    }
    createdAt: 2021-05-04T12:27:44.166Z
    createdByUser: class UserInfo {
        displayName: Administrator
        id: admin
    }
    parentId: 7f041db0-fdb6-4185-b921-2fb9ed381480
    isLink: true
    isFavorite: null
    content: null
    aspectNames: [cm:auditable]
    properties: {cm:destination=48413f7a-066d-4e38-b2e6-c84ede635493}
    allowableOperations: null
    path: null
    permissions: null
    definition: null
}

Note that the include parameter has been populated with the isLink value, which means the response will contain a value for the isLink property.