LegacyDAO

Manage the execution of queries in database. For example, the execution of queries in SQL or HQL.

Methods

executeSQL

Description:

Method	Return values	Description
executeSQL(final Reader rd)	void	Load specific database import.

• rd: Reader for the content

Example:

package com.openkm;

import java.io.InputStream;
import java.io.StringReader;

import org.apache.commons.io.IOUtils;

import com.openkm.core.Config;
import com.openkm.dao.LegacyDAO;
import com.openkm.util.ConfigUtils;
import com.openkm.util.DatabaseDialectAdapter;

public class Test {
  public static void main(String[] args) {
    try {
      InputStream is = ConfigUtils.getResourceAsStream("test.sql");
      String adapted = DatabaseDialectAdapter.dialectAdapter(is, Config.HIBERNATE_DIALECT);
      LegacyDAO.executeSQL(new StringReader(adapted));
      IOUtils.closeQuietly(is);

    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

executeSQL

Description:

Method	Return values	Description
executeSQL(final String query, Object… params)	List<List>	Execute SQL query.

• query: The query for execute

Example:

package com.openkm;

import java.util.List;

import com.openkm.bean.form.Option;
import com.openkm.dao.LegacyDAO;

public class Test {
  public static void main(String[] args) {
    try {
      String query = "select DMT_VIRTUAL_COLUMN, DMT_REAL_COLUMN from OKM_DB_METADATA_TYPE";
      for (List<String> row : LegacyDAO.executeSQL(query, null)) {
        Option option = new Option();
        option.setValue(row.get(0));
        option.setLabel(row.get(1));
        System.out.println("First value :" + row.get(0) + " Second value: " + row.get(1) + " ...");
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

executeHQL

Description:

Method	Return values	Description
executeHQL(final String query)	List	Execute HQL query.

• query: The text of the query to execut

Example:

package com.openkm;

import java.util.List;

import com.openkm.dao.LegacyDAO;

public class Test {
  public static void main(String[] args) {
    try {
      String query = "select dmt.virtualColumn, dmt.realColumn from DatabaseMetadataType dmt";
      List<object> list = LegacyDAO.executeHQL(query);
      for (Object obj : list) {
        Object[] dt = (Object[]) obj;
        System.out.println(
            "First value :" + String.valueOf(dt[0]) + " Second value: " + String.valueOf(dt[1]) + " ...");
      }

    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}