org.openmdx.state2.aop1.StateComparator Maven / Gradle / Ivy
/*
* ====================================================================
* Project: openMDX, http://www.openmdx.org/
* Description: StateComparator
* Owner: OMEX AG, Switzerland, http://www.omex.ch
* ====================================================================
*
* This software is published under the BSD license as listed below.
*
* Copyright (c) 2009, OMEX AG, Switzerland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of the openMDX team nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS 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 COPYRIGHT OWNER OR 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 product includes software developed by other organizations as
* listed in the NOTICE file.
*/
package org.openmdx.state2.aop1;
import java.io.Serializable;
import java.util.Comparator;
import java.util.Date;
import javax.xml.datatype.XMLGregorianCalendar;
import org.openmdx.base.accessor.cci.DataObject_1_0;
import org.openmdx.base.accessor.cci.SystemAttributes;
import org.openmdx.base.exception.ServiceException;
import org.openmdx.state2.spi.Order;
import org.openmdx.state2.spi.TechnicalAttributes;
/**
* State Comparator
*
* @deprecated as it is no longer used internally
*/
@Deprecated
public class StateComparator
implements Comparator, Serializable
{
/**
* Constructor
*/
private StateComparator(){
// Avoid external instantiation
}
/**
* A singleton
*/
private final static Comparator INSTANCE = new StateComparator();
/**
* Implements Serializable
*/
private static final long serialVersionUID = 8801286952504763272L;
/**
* Implements Comparable
*/
public int compare(DataObject_1_0 o1, DataObject_1_0 o2) {
if(o1.jdoIsDeleted()) {
return o2.jdoIsDeleted() ? 0 : 1;
}
if(o2.jdoIsDeleted()) {
return -1;
}
try {
int validFrom = Order.compareValidFrom(
(XMLGregorianCalendar)o1.objGetValue(TechnicalAttributes.STATE_VALID_FROM),
(XMLGregorianCalendar)o2.objGetValue(TechnicalAttributes.STATE_VALID_FROM)
);
if(validFrom != 0) {
return validFrom;
}
int removedAt = Order.compareRemovedAt(
(Date)o1.objGetValue(SystemAttributes.REMOVED_AT),
(Date)o2.objGetValue(SystemAttributes.REMOVED_AT)
);
return removedAt;
} catch (ServiceException exception) {
throw new IllegalArgumentException(
"The two data objects can't be compared",
exception
);
}
}
/**
* Retrieve an instance of this class
*
* @return the singleton
*/
public static Comparator getInstance(){
return INSTANCE;
}
}