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Java Predicate with SQL-like syntax support

There is a newer version: 2.1.2

package org.joo.libra.sql.node;

import org.joo.libra.Predicate;
import org.joo.libra.common.HasValue;
import org.joo.libra.logic.EqualsPredicate;
import org.joo.libra.logic.NotPredicate;
import org.joo.libra.sql.antlr.SqlLexer;

public class GenericCompareExpressionNode extends AbstractBinaryOpExpressionNode> {

	@Override
	public Predicate buildPredicate() {
		switch (getOp()) {
		case SqlLexer.EQUALS:
		case SqlLexer.IS_EQUALS:
		case SqlLexer.DBL_EQUALS:
			return new EqualsPredicate(getLeft(), getRight());
		case SqlLexer.NOT_EQUALS:
		case SqlLexer.IS_EQUALS_NOT:
			return new NotPredicate(new EqualsPredicate(getLeft(), getRight()));
		default:
			return null;
		}
	}
}