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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* particular file as subject to the "Classpath" exception as provided
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*
* 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.ui;
import com.sun.tools.visualvm.core.datasource.DataSource;
import com.sun.tools.visualvm.core.datasupport.Positionable;
import com.sun.tools.visualvm.core.snapshot.Snapshot;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* Class responsible for resolving DataSourceViews for DataSources.
*
* @author Jiri Sedlacek
*/
public final class DataSourceViewsManager {
private static final String APP_OVERVIEW_CLASS_workaround =
"com.sun.tools.visualvm.application.views.overview.ApplicationOverviewViewProvider"; // NOI18N
private static DataSourceViewsManager sharedInstance;
// TODO: implement some better data structure for cheaper providers query
private final Map<DataSourceViewProvider, Class<? extends DataSource>> providers = Collections.synchronizedMap(new HashMap());
/**
* Returns singleton instance of DataSourceViewsManager.
*
* @return singleton instance of DataSourceViewsManager.
*/
public static synchronized DataSourceViewsManager sharedInstance() {
if (sharedInstance == null) sharedInstance = new DataSourceViewsManager();
return sharedInstance;
}
/**
* Registers new DataSourceViewProvider for given DataSource scope.
*
* @param provider DataSourceViewProvider to be added,
* @param scope scope of DataSource types for which the provider provides views.
*/
public void addViewProvider(DataSourceViewProvider provider, Class<? extends DataSource> scope) {
providers.put(provider, scope);
}
/**
* Unregisters DataSourceViewProvider.
*
* @param provider DataSourceViewProvider to be removed.
*/
public void removeViewProvider(DataSourceViewProvider provider) {
providers.remove(provider);
}
/**
* Returns true if there's at least one DataSourceView for the DataSource which can
* be saved into the Snapshot type.
*
* @param dataSource DataSource for which to save the views.
* @param snapshotClass Snapshot type into which to save the views.
* @return true if there's at least one DataSourceView for the DataSource which can
* be saved into the Snapshot type, false otherwise.
*/
public boolean canSaveViewsFor(DataSource dataSource, Class<? extends Snapshot> snapshotClass) {
Set<DataSourceViewProvider> compatibleProviders = getCompatibleProviders(dataSource);
if (compatibleProviders.isEmpty()) return false;
// Workaround for #109 to not block synchronous actions updating in EDT
for (DataSourceViewProvider compatibleProvider : compatibleProviders)
if (APP_OVERVIEW_CLASS_workaround.equals(compatibleProvider.getClass().getName())) return true;
// --------------------------------------------------------------------
for (DataSourceViewProvider compatibleProvider : compatibleProviders)
if (compatibleProvider.supportsViewFor(dataSource) && compatibleProvider.supportsSaveViewFor(dataSource, snapshotClass))
return true;
return false;
}
/**
* Saves views for the DataSource into the Snapshot.
*
* @param dataSource DataSource for which to save the views.
* @param snapshot Snapshot into which to save the views.
*/
public void saveViewsFor(DataSource dataSource, Snapshot snapshot) {
Set<DataSourceViewProvider> compatibleProviders = getCompatibleProviders(dataSource);
for (DataSourceViewProvider compatibleProvider : compatibleProviders)
if (compatibleProvider.supportsViewFor(dataSource) && compatibleProvider.supportsSaveViewFor(dataSource, snapshot.getClass()))
compatibleProvider.viewSaveView(dataSource, snapshot);
}
boolean hasViewsFor(DataSource dataSource) {
Set<DataSourceViewProvider> compatibleProviders = getCompatibleProviders(dataSource);
if (compatibleProviders.isEmpty()) return false;
// Workaround for #109 to not block synchronous actions updating in EDT
for (DataSourceViewProvider compatibleProvider : compatibleProviders)
if (APP_OVERVIEW_CLASS_workaround.equals(compatibleProvider.getClass().getName())) return true;
// --------------------------------------------------------------------
for (DataSourceViewProvider compatibleProvider : compatibleProviders)
if (compatibleProvider.supportsViewFor(dataSource)) return true;
return false;
}
List<? extends DataSourceView> getViews(DataSource dataSource) {
List<DataSourceView> views = new ArrayList();
Set<DataSourceViewProvider> compatibleProviders = getCompatibleProviders(dataSource);
for (DataSourceViewProvider compatibleProvider : compatibleProviders)
if (compatibleProvider.supportsViewFor(dataSource))
views.add(compatibleProvider.getView(dataSource));
Collections.sort(views, Positionable.COMPARATOR);
return views;
}
private Set<DataSourceViewProvider> getCompatibleProviders(DataSource dataSource) {
Set<DataSourceViewProvider> compatibleProviders = new HashSet();
Set<DataSourceViewProvider> providersSet = providers.keySet();
for (DataSourceViewProvider provider : providersSet)
if (providers.get(provider).isInstance(dataSource))
compatibleProviders.add(provider);
return compatibleProviders;
}
private DataSourceViewsManager() {
}
}