Pass and return custom array object in ibatis and oracle in java

Question

I've looked around for a good example of this, but I haven't run into one yet. I want to pass a custom string array from java to oracle and back, using the IBATIS framework. Does anyone have a good link to an example? I'm calling stored procs from IBATIS.

Thanks

Answer 1

You've got to start with a custom instance of TypeHandler. We'd prefer to implement the simpler TypeHandlerCallback, but in this scenario we need access to the underlying Connection.

public class ArrayTypeHandler implements TypeHandler {

    public void setParameter(PreparedStatement ps, int i, Object param, String jdbcType)
            throws SQLException {
        if (param == null) {
            ps.setNull(i, Types.ARRAY);
        } else {
            Connection conn = ps.getConnection();
            Array loc = conn.createArrayOf("myArrayType", (Object[]) param);
            ps.setArray(i, loc);
        }
    }

    public Object getResult(CallableStatement statement, int i)
            throws SQLException {
        return statement.getArray(i).getArray();
    }
    ...
}

Then, to wire it up in the iBATIS config:

<?xml version="1.0"?>
<!DOCTYPE sqlMap PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN" "http://ibatis.apache.org/dtd/sql-map-2.dtd">

<sqlMap namespace="arrayTest">

    <parameterMap id="storedprocParams" class="map">
        <parameter property="result" mode="OUT" jdbcType="ARRAY" typeHandler="ArrayTypeHandler"/>
        <parameter property="argument" mode="IN" jdbcType="ARRAY" typeHandler="ArrayTypeHandler"/>
    </parameterMap>

    <procedure id="storedproc" parameterMap="arrayTest.storedprocParams">
        {? = call My_Array_Function( ? )}
    </procedure>

</sqlMap>

Hope this helps!