/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

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 */

package javax.management;

/**

 * This class is used by the query building mechanism to represent conjunctions

 * of relational expressions.

 * @serial include

 *

 * @since 1.5

 */

class AndQueryExp extends QueryEval implements QueryExp {

    /* Serial version */

    private static final long serialVersionUID = -1081892073854801359L;

    /**

     * @serial The first QueryExp of the conjunction

     */

    private QueryExp exp1;

    /**

     * @serial The second QueryExp of the conjunction

     */

    private QueryExp exp2;

    /**

     * Default constructor.

     */

    public AndQueryExp() {

    }

    /**

     * Creates a new AndQueryExp with q1 and q2 QueryExp.

     */

    public AndQueryExp(QueryExp q1, QueryExp q2) {

        exp1 = q1;

        exp2 = q2;

    }

    /**

     * Returns the left query expression.

     */

    public QueryExp getLeftExp()  {

        return exp1;

    }

    /**

     * Returns the right query expression.

     */

    public QueryExp getRightExp()  {

        return exp2;

    }

    /**

     * Applies the AndQueryExp on a MBean.

     *

     * @param name The name of the MBean on which the AndQueryExp will be applied.

     *

     * @return  True if the query was successfully applied to the MBean, false otherwise.

     *

     *

     * @exception BadStringOperationException The string passed to the method is invalid.

     * @exception BadBinaryOpValueExpException The expression passed to the method is invalid.

     * @exception BadAttributeValueExpException The attribute value passed to the method is invalid.

     * @exception InvalidApplicationException  An attempt has been made to apply a subquery expression to a

     * managed object or a qualified attribute expression to a managed object of the wrong class.

     */

    public boolean apply(ObjectName name) throws BadStringOperationException, BadBinaryOpValueExpException,

        BadAttributeValueExpException, InvalidApplicationException  {

        return exp1.apply(name) && exp2.apply(name);

    }

   /**

    * Returns a string representation of this AndQueryExp

    */

    @Override

    public String toString() {

        return "(" + exp1 + ") and (" + exp2 + ")";

    }

    @Override

    String toQueryString() {

        // Parentheses are only added if needed to disambiguate.

        return parens(exp1) + " and " + parens(exp2);

   }

   // Add parens if needed to disambiguate an expression such as

   // Query.and(Query.or(a, b), c).  We need to return

   // (a or b) and c

   // in such a case, because

   // a or b and c

   // would mean

   // a or (b and c)

   private static String parens(QueryExp exp) {

       String s = Query.toString(exp);

       if (exp instanceof OrQueryExp)

           return "(" + s + ")";

       else

           return s;

   }

}