如何使用FileNet API获取对象存储的文档数

import com.filenet.api.core.*;
import com.filenet.api.collection.*;
import com.filenet.api.query.*;
import com.filenet.api.util.*;

public class FileNetDocumentCount {
    public static void main(String[] args) {
        // 创建与FileNet对象存储的连接
        Connection connection = Factory.Connection.getConnection("FileNetURL");
        Subject subject = UserContext.createSubject(connection, "username", "password", "jaasStanzaName");
        UserContext.get().pushSubject(subject);

        try {
            // 获取域对象
            Domain domain = Factory.Domain.fetchInstance(connection, null, null);

            // 获取对象存储库对象
            ObjectStore objectStore = Factory.ObjectStore.fetchInstance(domain, "ObjectStoreName", null);

            // 获取文档类对象
            ClassDefinition documentClass = Factory.ClassDefinition.fetchInstance(objectStore, "DocumentClassName", null);

            // 创建一个查询，获取所有的文档对象
            SearchSQL searchSQL = new SearchSQL("SELECT * FROM " + documentClass.get_SymbolicName());
            SearchScope searchScope = new SearchScope(objectStore);
            RepositoryRowSet rowSet = searchScope.fetchRows(searchSQL, null, null, new Boolean(true));

            // 获取文档数
            int documentCount = rowSet.size();
            System.out.println("文档数：" + documentCount);
        } finally {
            UserContext.get().popSubject();
        }
    }
}