001: /*
002: * ====================================================================
003: * JAFFA - Java Application Framework For All
004: *
005: * Copyright (C) 2002 JAFFA Development Group
006: *
007: * This library is free software; you can redistribute it and/or
008: * modify it under the terms of the GNU Lesser General Public
009: * License as published by the Free Software Foundation; either
010: * version 2.1 of the License, or (at your option) any later version.
011: *
012: * This library is distributed in the hope that it will be useful,
013: * but WITHOUT ANY WARRANTY; without even the implied warranty of
014: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015: * Lesser General Public License for more details.
016: *
017: * You should have received a copy of the GNU Lesser General Public
018: * License along with this library; if not, write to the Free Software
019: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020: *
021: * Redistribution and use of this software and associated documentation ("Software"),
022: * with or without modification, are permitted provided that the following conditions are met:
023: * 1. Redistributions of source code must retain copyright statements and notices.
024: * Redistributions must also contain a copy of this document.
025: * 2. Redistributions in binary form must reproduce the above copyright notice,
026: * this list of conditions and the following disclaimer in the documentation
027: * and/or other materials provided with the distribution.
028: * 3. The name "JAFFA" must not be used to endorse or promote products derived from
029: * this Software without prior written permission. For written permission,
030: * please contact mail to: jaffagroup@yahoo.com.
031: * 4. Products derived from this Software may not be called "JAFFA" nor may "JAFFA"
032: * appear in their names without prior written permission.
033: * 5. Due credit should be given to the JAFFA Project (http://jaffa.sourceforge.net).
034: *
035: * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
036: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
037: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
038: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
039: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
040: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
041: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
042: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
043: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
044: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
045: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
046: * SUCH DAMAGE.
047: * ====================================================================
048: */
049:
050: package org.jaffa.persistence.engines.jdbcengine.proxy;
051:
052: import org.jaffa.persistence.exceptions.*;
053: import org.jaffa.datatypes.ValidationException;
054: import org.jaffa.exceptions.FrameworkException;
055: import org.jaffa.persistence.IPersistent;
056: import org.jaffa.persistence.Persistent;
057: import org.apache.log4j.Logger;
058: import org.jaffa.rules.RulesEngine;
059:
060: /** The PersistentInstanceInvocationHandler delegates all calls made to the IPersistent interface, to an instance of this class.
061: * It extends the Persistent class and overrides the actualInstance() method to return the proxy object.
062: */
063: class PersistentDelegate extends Persistent {
064:
065: private static final Logger log = Logger
066: .getLogger(PersistentDelegate.class);
067:
068: IPersistent m_proxy;
069:
070: /** This method returns the proxy object.
071: * @return the persistent instance.
072: */
073: protected IPersistent actualInstance() {
074: return m_proxy;
075: }
076:
077: /** Invokes the update() method on the base class.
078: */
079: void invokeUpdate() throws ReadOnlyObjectException,
080: AlreadyLockedObjectException,
081: IllegalPersistentStateRuntimeException {
082: super .update();
083: }
084:
085: /** Invokes the addInitialValue() method on the base class.
086: */
087: void invokeAddInitialValue(String fieldName, Object initialValue) {
088: super .addInitialValue(fieldName, initialValue);
089: }
090:
091: /** This method is triggered by the UOW, before adding this object to the Add-Store, but after a UOW has been associated to the object.
092: * This will perform the following tasks:
093: * Will invoke the Rules Engine to perform mandatory field checks.
094: * @throws PreAddFailedException if any error occurs during the process.
095: */
096: public void preAdd() throws PreAddFailedException {
097: if (log.isDebugEnabled())
098: log
099: .debug("Invoking the Dynamic Rules Engine to perform the mandatory rules on the Persistent object");
100: try {
101: RulesEngine.doMandatoryValidationsForDomainObject(this ,
102: this .getUOW());
103: } catch (Exception e) {
104: String str = "Exception thrown while invoking the Dynamic Rules Engine to perform the mandatory rules on the Persistent object";
105: log.error(str, e);
106: throw new PreAddFailedException(null, e);
107: }
108: }
109:
110: /** This method is triggered by the UOW, before adding this object to the Update-Store.
111: * This will perform the following tasks:
112: * Will invoke the Rules Engine to perform mandatory field checks.
113: * @throws PreUpdateFailedException if any error occurs during the process.
114: */
115: public void preUpdate() throws PreUpdateFailedException {
116: if (log.isDebugEnabled())
117: log
118: .debug("Invoking the Dynamic Rules Engine to perform the mandatory rules on the Persistent object");
119: try {
120: RulesEngine.doMandatoryValidationsForDomainObject(this ,
121: this .getUOW());
122: } catch (Exception e) {
123: String str = "Exception thrown while invoking the Dynamic Rules Engine to perform the mandatory rules on the Persistent object";
124: log.error(str, e);
125: throw new PreUpdateFailedException(null, e);
126: }
127: }
128:
129: }
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