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Diffstat (limited to 'projects/net.wotonomy.persistence/src/main/java/net/wotonomy/control/EONotQualifier.java')
| -rw-r--r-- | projects/net.wotonomy.persistence/src/main/java/net/wotonomy/control/EONotQualifier.java | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/projects/net.wotonomy.persistence/src/main/java/net/wotonomy/control/EONotQualifier.java b/projects/net.wotonomy.persistence/src/main/java/net/wotonomy/control/EONotQualifier.java new file mode 100644 index 0000000..d086840 --- /dev/null +++ b/projects/net.wotonomy.persistence/src/main/java/net/wotonomy/control/EONotQualifier.java @@ -0,0 +1,129 @@ +/* +Wotonomy: OpenStep design patterns for pure Java applications. +Copyright (C) 2001 Intersect Software Corporation + +This library is free software; you can redistribute it and/or +modify it under the terms of the GNU Lesser General Public +License as published by the Free Software Foundation; either +version 2.1 of the License, or (at your option) any later version. + +This library 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 +Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with this library; if not, see http://www.gnu.org +*/ + +package net.wotonomy.control; + +import net.wotonomy.foundation.internal.WotonomyException; + +/** +* EONotQualifiier negates a specified qualifier, +* evaluating to the opposite of the specified qualifier. +* +* @author michael@mpowers.net +* @author yjcheung@intersectsoft.com +* @author $Author: cgruber $ +* @version $Revision: 894 $ +*/ +public class EONotQualifier extends EOQualifier + implements EOKeyValueArchiving, EOQualifierEvaluation +{ + private EOQualifier qualifier; + + public EONotQualifier( + EOQualifier aQualifier ) + { + qualifier = aQualifier; + } + + /** + * Returns the qualifier that this qualifier negates. + */ + public EOQualifier qualifier() + { + return qualifier; + } + + /** + * Evaluates this qualifier for the specified object, + * and returns whether the object is qualified. + * evaluateWithObject is invoked on qualifier + * and the result is negated and returned. + */ + public boolean evaluateWithObject( Object anObject ) + { + return !(qualifier.evaluateWithObject(anObject)); + } + + /** + * Returns a string representation of this qualifier. + */ + public String toString() + { + return (new StringBuffer("Not ").append(qualifier.toString()).toString()); + } + + public static Object decodeWithKeyValueUnarchiver(EOKeyValueUnarchiver arch) { + EOQualifier q = (EOQualifier)arch.decodeObjectForKey("qualifier"); + if (q == null) + return null; + return new EONotQualifier(q); + } + + public void encodeWithKeyValueArchiver(EOKeyValueArchiver arch) { + arch.encodeObject("EONotQualifier", "class"); + if (qualifier instanceof EOKeyValueArchiving) { + EOKeyValueArchiver ar2 = new EOKeyValueArchiver(); + ((EOKeyValueArchiving)qualifier).encodeWithKeyValueArchiver(ar2); + arch.encodeObject(ar2.dictionary(), "qualifiers"); + } else + throw new WotonomyException("Cannot archive instance of " + qualifier.getClass().getName()); + } + +} + +/* + * $Log$ + * Revision 1.2 2006/02/16 16:47:14 cgruber + * Move some classes in to "internal" packages and re-work imports, etc. + * + * Also use UnsupportedOperationExceptions where appropriate, instead of WotonomyExceptions. + * + * Revision 1.1 2006/02/16 13:19:57 cgruber + * Check in all sources in eclipse-friendly maven-enabled packages. + * + * Revision 1.9 2003/08/12 01:43:04 chochos + * formally implement EOQualifierEvaluation + * + * Revision 1.8 2003/08/11 19:39:30 chochos + * special conditions for NSKeyValueCoding.NullValue -> EONull + * + * Revision 1.7 2003/08/09 01:24:19 chochos + * implements EOKeyValueArchiving + * + * Revision 1.6 2003/08/06 23:07:52 chochos + * general code cleanup (mostly, removing unused imports) + * + * Revision 1.5 2001/10/31 15:25:14 mpowers + * Cleanup of qualifiers. + * + * Revision 1.4 2001/10/30 22:57:28 mpowers + * EOQualifier framework is now working. + * + * Revision 1.3 2001/09/13 15:42:20 mpowers + * Fixed another cut/paste typo. + * + * Revision 1.2 2001/09/13 15:41:34 mpowers + * Fixed typo. + * + * Revision 1.1 2001/09/13 15:38:19 mpowers + * Started implementation of the EOQualifier framework. + * + * + */ + + |