/*******************************************************************************
* Copyright (c) 2008, 2016 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
******************************************************************************/
package org.eclipse.ui.examples.contributions.model;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.ui.AbstractSourceProvider;
import org.eclipse.ui.ISources;
/**
* An example of provide a Person as a variable to the evaluation service.
*
* @since 3.4
*/
public class UserSourceProvider extends AbstractSourceProvider {
public static final String USER = "org.eclipse.ui.examples.contributions.user"; //$NON-NLS-1$
private static final String[] PROVIDED_SOURCE_NAMES = new String[] { USER };
private static final Object GUEST = new Object();
private Person user = null;
@Override
public void dispose() {
user = null;
}
@Override
public Map<?,?> getCurrentState() {
Map<String, Object> m = new HashMap<>();
m.put(USER, getCurrentUser());
return m;
}
private Object getCurrentUser() {
return user == null ? GUEST : user;
}
public void login(Person person) {
user = person;
// I'm not sure whether this has to be accurate, so use the matching
// declaration priority <<1 for now
fireSourceChanged(ISources.ACTIVE_SITE << 1, USER, getCurrentUser());
}
@Override
public String[] getProvidedSourceNames() {
return PROVIDED_SOURCE_NAMES;
}
}