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The jBATIS persistence framework will help you to significantly reduce the amount of Java code that you normally need to access a relational database. iBATIS simply maps JavaBeans to SQL statements using a very simple XML descriptor.

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package org.ibatis.persist.impl.expression;

import org.ibatis.persist.impl.CriteriaBuilderImpl;
import org.ibatis.persist.impl.RenderingContext;

/**
 * Represents a NULLliteral expression.
 */
public class NullLiteralExpression extends ExpressionImpl {
	public NullLiteralExpression(CriteriaBuilderImpl criteriaBuilder, Class type) {
		super( criteriaBuilder, type );
	}

    public void render(RenderingContext rc) {
        rc.append("null");
    }

    public void renderProjection(RenderingContext rc) {
        render(rc);
        if (getAlias() != null) {
            rc.append(" AS ").append(getAlias());
        }
    }
}