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/*******************************************************************************
* Copyright (c) 2004, 2007 Boeing.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.framework.resource.management.internal;
import java.util.Collection;
import java.util.concurrent.CopyOnWriteArraySet;
import org.eclipse.osee.framework.core.exception.OseeCoreException;
import org.eclipse.osee.framework.resource.management.IResource;
import org.eclipse.osee.framework.resource.management.IResourceListener;
import org.eclipse.osee.framework.resource.management.IResourceLocator;
import org.eclipse.osee.framework.resource.management.IResourceManager;
import org.eclipse.osee.framework.resource.management.IResourceProvider;
import org.eclipse.osee.framework.resource.management.Options;
import org.eclipse.osee.framework.resource.management.exception.InvalidLocatorException;
/**
* @author Roberto E. Escobar
*/
public class ResourceManager implements IResourceManager {
private final Collection<IResourceListener> listeners;
private final Collection<IResourceProvider> resourceProviders;
public ResourceManager() {
this.listeners = new CopyOnWriteArraySet<IResourceListener>();
this.resourceProviders = new CopyOnWriteArraySet<IResourceProvider>();
}
@Override
public boolean addResourceListener(IResourceListener listener) {
return listeners.add(listener);
}
public boolean removeResourceListener(IResourceListener listener) {
return listeners.remove(listener);
}
private void notifyPreOnDelete(final IResourceLocator locator) {
for (IResourceListener listener : listeners) {
listener.onPreDelete(locator);
}
}
private void notifyPostOnDelete(final IResourceLocator locator) {
for (IResourceListener listener : listeners) {
listener.onPostDelete(locator);
}
}
private void notifyPreOnSave(final IResourceLocator locator, IResource resource, Options options) {
for (IResourceListener listener : listeners) {
listener.onPreSave(locator, resource, options);
}
}
private void notifyPostOnSave(IResourceLocator locator, final IResource resource, Options options) {
for (IResourceListener listener : listeners) {
listener.onPostSave(locator, resource, options);
}
}
private void notifyPreOnAcquire(final IResourceLocator locator) {
for (IResourceListener listener : listeners) {
listener.onPreAcquire(locator);
}
}
private void notifyPostOnAcquire(final IResource resource) {
for (IResourceListener listener : listeners) {
listener.onPostAcquire(resource);
}
}
private IResourceProvider getProvider(IResourceLocator locator) throws OseeCoreException {
IResourceProvider toReturn = null;
for (IResourceProvider provider : resourceProviders) {
if (provider.isValid(locator) != false) {
toReturn = provider;
break;
}
}
if (toReturn == null) {
throw new InvalidLocatorException(String.format("Invalid Locator: [%s]", locator));
}
return toReturn;
}
@Override
public boolean addResourceProvider(IResourceProvider resourceProvider) {
return resourceProviders.add(resourceProvider);
}
@Override
public boolean removeResourceProvider(IResourceProvider resourceProvider) {
return resourceProviders.remove(resourceProvider);
}
public IResource acquire(IResourceLocator locator, Options options) throws OseeCoreException {
IResourceProvider provider = getProvider(locator);
notifyPreOnAcquire(locator);
IResource toReturn = provider.acquire(locator, options);
notifyPostOnAcquire(toReturn);
return toReturn;
}
public IResourceLocator save(IResourceLocator locator, IResource resource, Options options) throws OseeCoreException {
IResourceProvider provider = getProvider(locator);
notifyPreOnSave(locator, resource, options);
IResourceLocator actualLocator = provider.save(locator, resource, options);
notifyPostOnSave(locator, resource, options);
return actualLocator;
}
public int delete(IResourceLocator locator) throws OseeCoreException {
int toReturn = IResourceManager.FAIL;
IResourceProvider provider = getProvider(locator);
notifyPreOnDelete(locator);
toReturn = provider.delete(locator);
notifyPostOnDelete(locator);
return toReturn;
}
@Override
public boolean exists(IResourceLocator locator) throws OseeCoreException {
IResourceProvider provider = getProvider(locator);
return provider.exists(locator);
}
}
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