/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
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package com.sun.tools.visualvm.core.explorer;
import com.sun.tools.visualvm.core.datasource.DataSource;
import com.sun.tools.visualvm.core.datasource.descriptor.DataSourceDescriptor;
import com.sun.tools.visualvm.core.datasource.descriptor.DataSourceDescriptorFactory;
import com.sun.tools.visualvm.core.datasupport.Positionable;
import java.util.Comparator;
/**
*
* @author Jiri Sedlacek
*/
abstract class DataSourcesComparator implements Comparator<DataSource> {
public int compare(DataSource d1, DataSource d2) {
DataSourceDescriptor dd1 = DataSourceDescriptorFactory.getDescriptor(d1);
DataSourceDescriptor dd2 = DataSourceDescriptorFactory.getDescriptor(d2);
int p1 = dd1.getPreferredPosition();
int p2 = dd2.getPreferredPosition();
if (p1 == Positionable.POSITION_AT_THE_END &&
p2 == Positionable.POSITION_AT_THE_END) {
p1 = getRelativePosition(d1, Positionable.POSITION_AT_THE_END);
p2 = getRelativePosition(d2, Positionable.POSITION_AT_THE_END);
} else if (p1 == Positionable.POSITION_LAST &&
p2 == Positionable.POSITION_LAST) {
p1 = getRelativePosition(d1, Positionable.POSITION_LAST);
p2 = getRelativePosition(d2, Positionable.POSITION_LAST);
}
int result = doCompare(p1, p2);
if (result == 0) result = dd1.getName().compareTo(dd2.getName());
return result;
}
protected abstract int getRelativePosition(DataSource d, int positionType);
private int doCompare(int i1, int i2) {
if (i1 == i2) return 0;
if (i1 > i2) return 1;
return -1;
}
}