equaltocriteria.java

根据Scott W. Ambler在1998年写的关于ORM Persistence Layer的详细设计论文的设计思路,Artem Rudoy 开发了一个开源的ORM实现 -- PL(Persist

package pl.criteria;


/**
 *
 */
public class EqualToCriteria extends SelectionCriteria
{
    public EqualToCriteria(pl.map.ClassMap classMap, pl.map.AttributeMap attributeMap)
    {
        super(classMap, attributeMap);
    }

    /**
     * asSqlClause method comment.
     */
    public void fillSqlStatement(pl.sql.SqlStatement statement, java.util.Iterator parameters) throws pl.PlException
    {
        pl.map.ColumnMap cm = getAttributeMap().getColumnMap();
        Object parameter = parameters.next();
        if(parameter != null)
        {
            statement.addSqlClause(cm.getFullyQualifiedName() + "=?");
        }
        else
        {
            statement.addSqlClause(cm.getFullyQualifiedName() + " " +
            getClassMap().getRelationalDatabase().getClauseStringIs() + " ?");
        }

        statement.addParameter(parameter, cm.getPlType());
    }
}