openCMIS: getOrderByCapability: ordering capabilities of the repository

RepositoryCapabilities interface provide 'getOrderByCapability' method to check the ordering capabilities of the repository. Following table summarizes possible ordering capabilities of the repository.

Value	Description
none	Ordering is not supported
common	Only common CMIS properties are supported.
custom	Common CMIS properties and custom object-type properties are supported.

TestCmis.java

package com.sample.util;

import java.util.HashMap;
import java.util.Map;

import org.apache.chemistry.opencmis.client.api.CmisObject;
import org.apache.chemistry.opencmis.client.api.Folder;
import org.apache.chemistry.opencmis.client.api.ItemIterable;
import org.apache.chemistry.opencmis.client.api.OperationContext;
import org.apache.chemistry.opencmis.client.api.Session;
import org.apache.chemistry.opencmis.client.api.SessionFactory;
import org.apache.chemistry.opencmis.client.runtime.OperationContextImpl;
import org.apache.chemistry.opencmis.client.runtime.SessionFactoryImpl;
import org.apache.chemistry.opencmis.commons.SessionParameter;
import org.apache.chemistry.opencmis.commons.data.RepositoryInfo;
import org.apache.chemistry.opencmis.commons.enums.BindingType;
import org.apache.chemistry.opencmis.commons.enums.CapabilityOrderBy;

public class TestCmis {

 private static String serverURL = "http://localhost:8080/chemistry-opencmis-server-inmemory-1.1.0/browser";
 private static String repositoryId = "A1";

 public static Session getSession() {
  Map<String, String> parameters = new HashMap<>();
  parameters.put(SessionParameter.BINDING_TYPE, BindingType.BROWSER.value());

  parameters.put(SessionParameter.USER, "");
  parameters.put(SessionParameter.PASSWORD, "");

  parameters.put(SessionParameter.REPOSITORY_ID, repositoryId);
  parameters.put(SessionParameter.BROWSER_URL, serverURL);

  SessionFactory sessionFactory = SessionFactoryImpl.newInstance();
  return sessionFactory.createSession(parameters);
 }

 public static void main(String args[]) {
  Session session = getSession();

  RepositoryInfo repoInfo = session.getRepositoryInfo();

  CapabilityOrderBy capabilityOrderBy = repoInfo.getCapabilities().getOrderByCapability();

  if (capabilityOrderBy == null) {
   System.out.println("Ordering is not supported");
   return;
  }

  System.out.println(capabilityOrderBy);

  Folder rootFolder = session.getRootFolder();

  OperationContext ascContext = new OperationContextImpl();
  ascContext.setOrderBy("cmis:name ASC, cmis:creationDate ASC");

  OperationContext descContext = new OperationContextImpl();
  descContext.setOrderBy("cmis:name DESC, cmis:creationDate DESC");

  printChildren(rootFolder, ascContext);

  System.out.println("\n************************************\n");
  printChildren(rootFolder, descContext);
 }

 private static void printChildren(Folder rootFolder, OperationContext context) {
  ItemIterable<CmisObject> cmisObjects = rootFolder.getChildren(context);

  for (CmisObject cmisObject : cmisObjects) {
   System.out.println(cmisObject.getName());
  }
 }
}

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