CRUD-Based Metadata Development

import com.sforce.soap.metadata.*;

/**
 * Sample that logs in and creates a custom object through the metadata API
 */
public class CRUDSampleCreate {
    private MetadataConnection metadataConnection;

    // one second in milliseconds
    private static final long ONE_SECOND = 1000;

    public CRUDSampleCreate() {
    }

    public static void main(String[] args) throws Exception {
        CRUDSampleCreate crudSample = new CRUDSampleCreate();
        crudSample.runCreate();
    }

    /**
     * Create a custom object. This method demonstrates usage of the
     * create() and checkStatus() calls.
     *
     * @param uniqueName Custom object name should be unique.
     */
    private void createCustomObjectSync(final String uniqueName) throws Exception {
        final String label = "My Custom Object";
        CustomObject co = new CustomObject();
        co.setFullName(uniqueName);
        co.setDeploymentStatus(DeploymentStatus.Deployed);
        co.setDescription("Created by the Metadata API Sample");
        co.setEnableActivities(true);
        co.setLabel(label);
        co.setPluralLabel(label + "s");
        co.setSharingModel(SharingModel.ReadWrite);

        // The name field appears in page layouts, related lists, and elsewhere.
        CustomField nf = new CustomField();
        nf.setType(FieldType.Text);
        nf.setDescription("The custom object identifier on page layouts, related lists etc");
        nf.setLabel(label);
        nf.setFullName(uniqueName);
        customObject.setNameField(nf);

        SaveResult[] results = metadataConnection
                .createMetadata(new Metadata[] { co });

        for (SaveResult r : results) {
            if (r.isSuccess()) {
                System.out.println("Created component: " + r.getFullName());
            } else {
                System.out
                        .println("Errors were encountered while creating "
                                + r.getFullName());
                for (Error e : r.getErrors()) {
                    System.out.println("Error message: " + e.getMessage());
                    System.out.println("Status code: " + e.getStatusCode());
                }
            }
        }
    }

    private void runCreate() throws Exception {
        metadataConnection = MetadataLoginUtil.login();
        // Custom objects and fields must have __c suffix in the full name.
        final String uniqueObjectName = "MyCustomObject__c";
        createCustomObjectSync(uniqueObjectName);
    }
}

import com.sforce.soap.metadata.*;

/**
 * Sample that logs in and creates a custom object through the metadata api
 */
public class CRUDSample {
    private MetadataConnection metadataConnection;

    // one second in milliseconds
    private static final long ONE_SECOND = 1000;

    public CRUDSample() {
    }

    public static void main(String[] args) throws Exception {
        CRUDSample crudSample = new CRUDSample();
        crudSample.runCreate();
    }

    /**
     * Create a custom object. This method demonstrates usage of the
     * create() and checkStatus() calls.
     *
     * @param uniqueName Custom object name should be unique.
     */
    private void createCustomObject(final String uniqueName) throws Exception {
        final String label = "My Custom Object";
        CustomObject customObject = new CustomObject();
        customObject.setFullName(uniqueName);
        customObject.setDeploymentStatus(DeploymentStatus.Deployed);
        customObject.setDescription("Created by the Metadata API Sample");
        customObject.setLabel(label);
        customObject.setPluralLabel(label + "s");
        customObject.setSharingModel(SharingModel.ReadWrite);

        // The name field appears in page layouts, related lists, and elsewhere.
        CustomField nf = new CustomField();
        nf.setType(FieldType.Text);
        nf.setDescription("The custom object identifier on page layouts, related lists etc");
        nf.setLabel(label);
        nf.setFullName(uniqueName);
        customObject.setNameField(nf);

        AsyncResult[] asyncResults = metadataConnection.create(
            new CustomObject[]{customObject});
        if (asyncResults == null) {
            System.out.println("The object was not created successfully");
            return;
        }

        long waitTimeMilliSecs = ONE_SECOND;

        // After the create() call completes, we must poll the results of the checkStatus()
        // call until it indicates that the create operation has completed.
        do {
            printAsyncResultStatus(asyncResults);
            waitTimeMilliSecs *= 2;
            Thread.sleep(waitTimeMilliSecs);
            asyncResults = metadataConnection.checkStatus(new String[]{asyncResults[0].getId()});
        } while (!asyncResults[0].isDone());

        printAsyncResultStatus(asyncResults);
    }

    private void printAsyncResultStatus(AsyncResult[] asyncResults) throws Exception {
        if (asyncResults == null || asyncResults.length == 0 || asyncResults[0] == null) {
            throw new Exception("The object status cannot be retrieved");
        }

        AsyncResult asyncResult = asyncResults[0]; //we are creating only 1 metadata object

        if (asyncResult.getStatusCode() != null) {
            System.out.println("Error status code: " +
                    asyncResult.getStatusCode());
            System.out.println("Error message: " + asyncResult.getMessage());
        }

        System.out.println("Object with id:" + asyncResult.getId() + " is " +
            asyncResult.getState());
    }

    private void runCreate() throws Exception {
        metadataConnection = MetadataLoginUtil.login();
        // Custom objects and fields must have __c suffix in the full name.
        final String uniqueObjectName = "MyCustomObject__c";
        createCustomObject(uniqueObjectName);
    }
}