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The DBCHECKBOX control represents a filter criterion of a database query of type Boolean. Compared to a "normal" CHECKBOX control, the only benefit is the convenient way of appending the filter criterion to the SELECT statement.

This document covers the following topics:

• Example

• Properties

Example

The following image shows an example in which the DBCHECKBOX is used for the filter criterion "Female":

Have a look at the XML layout definition:

<rowarea name="Filter Criteria">
    <itr>
        <label name="Female" width="80">
        </label>
        <dbcheckbox valueprop="dBCheckboxFemale" querycolumn="FEMALE">
        </dbcheckbox>
        <hdist width="100%">
        </hdist>
        <button name="Execute" method="onExecute">
        </button>
    </itr>
</rowarea>
<vdist>
</vdist>
<rowarea name="Result" height="140">
    <itr height="100%">
        <textgridsss2 griddataprop="result" rowcount="5" width="100%">
            <column name="Title" property="TITLE" width="50">
            </column>
            <column name="Last Name" property="LASTNAME" width="100">
            </column>
            <column name="First Name" property="FIRSTNAME" width="100">
            </column>
            <column name="Country" property="COUNTRY" width="50">
            </column>
            <column name="State" property="STATE" width="100%">
            </column>
        </textgridsss2>
    </itr>
</rowarea>

The corresponding adapter code is:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;

import com.softwareag.cis.server.Adapter;
import com.softwareag.cis.server.util.DBCHECKBOXInfo;
import com.softwareag.cis.server.util.DBTEXTGRIDCollection;
import com.softwareag.cis.server.util.DBUtil;
import com.softwareag.cis.server.util.DelegateError;
import com.softwareag.cis.server.util.IDBCondition;
import com.softwareag.cis.server.util.IDBQUERYConnectionProvider;

// This class is a generated one.

public class DBCHECKBOX_Adapter
    extends Adapter
    implements IDBQUERYConnectionProvider, IDBDemoAdapter
{
    // ------------------------------------------------------------------------
    // members
    // ------------------------------------------------------------------------
...
    // property >dBCheckboxFemale<
    DBCHECKBOXInfo m_dBCheckboxFemale = new DBCHECKBOXInfo();
    public DBCHECKBOXInfo getDBCheckboxFemale() { return m_dBCheckboxFemale; }

    // property >result<
    DBTEXTGRIDCollection m_result = new DBTEXTGRIDCollection();
    public DBTEXTGRIDCollection getResult() { return m_result; }
    public void setResult(DBTEXTGRIDCollection value) { m_result = value; }
...
    // ------------------------------------------------------------------------
    // public adapter methods
    // ------------------------------------------------------------------------
...
    public void onExecute()
    {
        try
        {
            StringBuffer sb = new StringBuffer();
            sb.append("SELECT * FROM BUSINESSPARTNER INNER JOIN ADDRESS ON BUSINESSPARTNER.ID = 
                                ADDRESS.BUSINESSPARTNERID");
            DBUtil.addToQuery(sb, new IDBCondition[] { m_dBCheckboxFemale }, true);
            Class.forName("org.hsqldb.jdbcDriver");
            Connection con = DriverManager.getConnection("jdbc:hsqldb:hsql://localhost", "sa", "");
            ResultSet rs = con.createStatement().executeQuery(sb.toString());
            m_result.initWithResultSet(rs);
        }
        catch (Exception exc)
        {
            throw new DelegateError(exc);
        }
    }

The adapter property dBCheckboxFemale is of type DBCHECKBOXInfo (from the package com.softwareag.cis.server.util). This class has a property value that is manipulated by the DBCHECKBOX control. The DBCHECKBOXInfo implements (like all DB controls) the interface IDBCondition (com.softwareag.cis.server.util). With class DBUtil (com.softwareag.cis.server.util) there is a convenient way to append the filter value to the SQL query. See the JavaDoc documentation of class DBCHECKBOXInfo and DBUtil for details.

For displaying the result, the class DBTEXTGRIDCollection (from the package com.softwareag.cis.server.util) is used. This class extends TEXTGRIDCollection by the ability to initialise the collection with a result set (java.sql.ResultSet). For each line of the result set, it creates an object of class DBTEXTGRIDLine (package com.softwareag.cis.server.util). Class DBTEXTGRIDLine implements the interface IDynamicAccess. With this, "normal" text grid controls can be used to visualize the data of the DBTEXTGRIDCollection.

Properties

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