/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2 of the License.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.enterprise.gui.measurement;
import java.util.ArrayList;
import java.util.List;
import org.rhq.core.domain.auth.Subject;
import org.rhq.core.domain.measurement.DisplayType;
import org.rhq.core.domain.measurement.MeasurementDataTrait;
import org.rhq.enterprise.gui.util.EnterpriseFacesContextUtility;
import org.rhq.enterprise.server.measurement.MeasurementDataManagerLocal;
import org.rhq.enterprise.server.util.LookupUtil;
/**
* JSF managed bean for the display of summary traits on the top of a resource page.
*
* <p/>The Constructor fetches the trait data from the server and fills them into a list of trait pairs, each pair to be
* represented as a row in a two-column table display.
*
* @author Heiko W. Rupp
* @author Ian Springer
*/
public class TraitListBean {
private List<List<MeasurementDataTrait>> traitPairs;
private int totalTraits;
private MeasurementDataManagerLocal dataManager = LookupUtil.getMeasurementDataManager();
public TraitListBean() {
}
private void load() {
int resourceId = EnterpriseFacesContextUtility.getResource().getId();
Subject subject = EnterpriseFacesContextUtility.getSubject();
List<MeasurementDataTrait> traits = this.dataManager.findCurrentTraitsForResource(subject, resourceId,
DisplayType.SUMMARY);
this.totalTraits = traits.size();
int middleIndex = (this.totalTraits + 1) / 2;
this.traitPairs = new ArrayList<List<MeasurementDataTrait>>(middleIndex);
if (this.totalTraits > 0) {
List<MeasurementDataTrait> leftColumnTraits = traits.subList(0, middleIndex);
List<MeasurementDataTrait> rightColumnTraits = traits.subList(middleIndex, this.totalTraits);
for (int i = 0; i < leftColumnTraits.size(); i++) {
List<MeasurementDataTrait> traitPair = new ArrayList<MeasurementDataTrait>(2);
traitPair.add(leftColumnTraits.get(i));
if (i < rightColumnTraits.size()) {
traitPair.add(rightColumnTraits.get(i));
} else {
traitPair.add(null);
}
this.traitPairs.add(traitPair);
}
}
}
public List<List<MeasurementDataTrait>> getTraitPairs() {
if (this.traitPairs == null) {
try {
load();
} catch (Exception e) {
// This happens sometimes when the summary areas is closed, but we won't worry about it
}
}
return this.traitPairs;
}
public int getTotalTraits() {
if (this.traitPairs == null)
load();
return this.totalTraits;
}
}