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- /*--
-
- $Id: NegateFilter.java,v 1.4 2007/11/10 05:29:00 jhunter Exp $
-
- Copyright (C) 2000-2007 Jason Hunter & Brett McLaughlin.
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
-
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions, and the following disclaimer.
-
- 2. Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions, and the disclaimer that follows
- these conditions in the documentation and/or other materials
- provided with the distribution.
-
- 3. The name "JDOM" must not be used to endorse or promote products
- derived from this software without prior written permission. For
- written permission, please contact <request_AT_jdom_DOT_org>.
-
- 4. Products derived from this software may not be called "JDOM", nor
- may "JDOM" appear in their name, without prior written permission
- from the JDOM Project Management <request_AT_jdom_DOT_org>.
-
- In addition, we request (but do not require) that you include in the
- end-user documentation provided with the redistribution and/or in the
- software itself an acknowledgement equivalent to the following:
- "This product includes software developed by the
- JDOM Project (http://www.jdom.org/)."
- Alternatively, the acknowledgment may be graphical using the logos
- available at http://www.jdom.org/images/logos.
-
- THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- DISCLAIMED. IN NO EVENT SHALL THE JDOM AUTHORS OR THE PROJECT
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- SUCH DAMAGE.
-
- This software consists of voluntary contributions made by many
- individuals on behalf of the JDOM Project and was originally
- created by Jason Hunter <jhunter_AT_jdom_DOT_org> and
- Brett McLaughlin <brett_AT_jdom_DOT_org>. For more information
- on the JDOM Project, please see <http://www.jdom.org/>.
-
- */
-
- package org.jdom.filter;
-
- /**
- * Filter that is the logical <b>negation</b> operation of another filter.
- *
- *
- * @author Bradley S. Huffman
- * @version $Revision: 1.4 $, $Date: 2007/11/10 05:29:00 $
- */
- final class NegateFilter extends AbstractFilter {
-
- private static final String CVS_ID =
- "@(#) $RCSfile: NegateFilter.java,v $ $Revision: 1.4 $ $Date: 2007/11/10 05:29:00 $";
-
- // Underlying filter.
- private Filter filter;
-
- /**
- * Match if the supplied filter <b>does not</b> match.
- *
- * @param filter filter to use.
- */
- public NegateFilter(Filter filter) {
- this.filter = filter;
- }
-
- public boolean matches(Object obj) {
- return !filter.matches(obj);
- }
-
- public Filter negate() {
- return filter;
- }
-
- public boolean equals(Object obj) {
- if (this == obj) {
- return true;
- }
-
- if (obj instanceof NegateFilter) {
- return filter.equals(((NegateFilter) obj).filter);
- }
- return false;
- }
-
- public int hashCode() {
- return ~filter.hashCode();
- }
-
- public String toString() {
- return new StringBuffer(64)
- .append("[NegateFilter: ")
- .append(filter.toString())
- .append("]")
- .toString();
- }
- }
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