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/*
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* Copyright 1999-2004 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package javax.management;
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/**
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* This class is used by the query building mechanism to represent conjunctions
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* of relational expressions.
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* @serial include
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*
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* @since 1.5
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*/
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class AndQueryExp extends QueryEval implements QueryExp {
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/* Serial version */
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private static final long serialVersionUID = -1081892073854801359L;
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/**
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* @serial The first QueryExp of the conjunction
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*/
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private QueryExp exp1;
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/**
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* @serial The second QueryExp of the conjunction
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*/
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private QueryExp exp2;
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/**
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* Default constructor.
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*/
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public AndQueryExp() {
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}
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/**
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* Creates a new AndQueryExp with q1 and q2 QueryExp.
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*/
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public AndQueryExp(QueryExp q1, QueryExp q2) {
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exp1 = q1;
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exp2 = q2;
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}
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/**
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* Returns the left query expression.
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*/
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public QueryExp getLeftExp() {
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return exp1;
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}
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/**
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* Returns the right query expression.
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*/
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public QueryExp getRightExp() {
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return exp2;
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}
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/**
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* Applies the AndQueryExp on a MBean.
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*
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* @param name The name of the MBean on which the AndQueryExp will be applied.
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*
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* @return True if the query was successfully applied to the MBean, false otherwise.
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*
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*
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* @exception BadStringOperationException The string passed to the method is invalid.
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* @exception BadBinaryOpValueExpException The expression passed to the method is invalid.
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* @exception BadAttributeValueExpException The attribute value passed to the method is invalid.
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* @exception InvalidApplicationException An attempt has been made to apply a subquery expression to a
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* managed object or a qualified attribute expression to a managed object of the wrong class.
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*/
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public boolean apply(ObjectName name) throws BadStringOperationException, BadBinaryOpValueExpException,
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BadAttributeValueExpException, InvalidApplicationException {
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return exp1.apply(name) && exp2.apply(name);
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}
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/**
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* Returns a string representation of this AndQueryExp
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*/
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public String toString() {
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return "(" + exp1 + ") and (" + exp2 + ")";
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}
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@Override
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String toQueryString() {
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// Parentheses are only added if needed to disambiguate.
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return parens(exp1) + " and " + parens(exp2);
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}
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// Add parens if needed to disambiguate an expression such as
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// Query.and(Query.or(a, b), c). We need to return
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// (a or b) and c
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// in such a case, because
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// a or b and c
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// would mean
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// a or (b and c)
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private static String parens(QueryExp exp) {
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String s = Query.toString(exp);
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if (exp instanceof OrQueryExp)
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return "(" + s + ")";
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else
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return s;
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}
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}
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