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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.predicate;

import org.ibatis.persist.criteria.Expression;

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

/**
 * Predicate to assert the explicit value of a boolean expression:
 * x = true
 * x = false
 * x <> true
 * x <> false
 * 
 */
public class BooleanAssertionPredicate
		extends AbstractSimplePredicate {
	private final Expression expression;
	private final Boolean assertedValue;

	public BooleanAssertionPredicate(
			CriteriaBuilderImpl criteriaBuilder,
			Expression expression,
			Boolean assertedValue) {
		super( criteriaBuilder );
		this.expression = expression;
		this.assertedValue = assertedValue;
	}

	public Expression getExpression() {
		return expression;
	}

	public Boolean getAssertedValue() {
		return assertedValue;
	}

	@Override
    public void render(boolean isNegated, RenderingContext rc) {
        final String operator = isNegated ? " <> " : " = ";
        final String assertionLiteral = assertedValue ? "true" : "false";

        ((Renderable) expression).render(rc);
        rc.append(operator).append(assertionLiteral);
    }
}