/******************************************************************************* * Copyright (c) 2007, 2010 Association for Decentralized Information Management * in Industry THTH ry. * 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: * VTT Technical Research Centre of Finland - initial API and implementation *******************************************************************************/ package org.simantics.browsing.ui.graph.impl; import java.util.concurrent.Semaphore; import org.simantics.browsing.ui.BuiltinKeys; import org.simantics.browsing.ui.NodeContext; import org.simantics.browsing.ui.content.Labeler.Modifier; import org.simantics.db.ReadGraph; import org.simantics.db.Resource; import org.simantics.db.Session; import org.simantics.db.WriteGraph; import org.simantics.db.common.request.ReadRequest; import org.simantics.db.common.request.WriteRequest; import org.simantics.db.exception.DatabaseException; import org.simantics.db.layer0.adapter.StringIndexModifier; import org.simantics.db.layer0.adapter.StringModifier; import org.simantics.db.layer0.adapter.TObjectIntPair; import org.simantics.layer0.utils.representation.StringRepresentation2; import org.simantics.utils.datastructures.Callback; import org.simantics.utils.ui.ErrorLogger; /** * Please implement: *
* Other points of customization: *
*non-null
, the modifier could not be fetched, e.g. adapted
* from the specified INodeContext.
*/
protected Throwable modifierFailed;
/**
* @param context
* @param session
*/
public GraphStringIndexModifier(NodeContext context, Session session, int index) throws DatabaseException {
this.context = context;
this.session = session;
this.index = index;
final Resource r = getResourceToModify();
if (r == null)
throw new IllegalArgumentException("This modifier does not work for INodeContexts that are not adaptable to a Resource. The context input is: " + context.getConstant(BuiltinKeys.INPUT));
session.syncRequest(new ReadRequest() {
@Override
public void run(ReadGraph g) throws DatabaseException {
initialValue = getInitialValue(g);
GraphStringIndexModifier.this.modifier = g.adapt(r, StringIndexModifier.class);
initializeGraphModifier(g);
modifierReady.release();
}
});
}
/**
* @param g
* @return the value that shall be returned by {@link #getValue()}
*/
protected String getInitialValue(ReadGraph g) throws DatabaseException {
StringRepresentation2 sr = g.adapt(getResourceToModify(), StringRepresentation2.class);
String s = sr.get(g, index);
return s;
}
/**
* Override to perform graph-based initialization actions for this modifier.
*
* @param g the graph handle
*/
protected void initializeGraphModifier(ReadGraph g) {
}
/**
* @return the Resource to modify based on the input INodeContext. This
* resource must be adaptable to a {@link StringModifier} in order
* for this modifier to work.
*/
protected Resource getResourceToModify() {
Resource r = (Resource) context.getAdapter(Resource.class);
if (r == null)
throw new AssertionError("context.getAdapter(Resource.class) returned null");
return r;
}
/**
* @return the modifier or null
if the StringModifier adaption
* has not completed yet.
*/
protected StringIndexModifier getModifier() {
return modifier;
}
@Override
public String getValue() {
return initialValue;
}
@Override
public String isValid(String label) {
if (modifierFailed != null)
return "Could not resolve validator for this value, modification denied. Reason: " + modifierFailed.getMessage();
if (modifier == null)
// Cannot validate yet, the validator has not been resolved.
// For the time being, consider the value invalid for no
// apparent reason to the user.
return "";
TObjectIntPair* This default implementation will always allow the modification to proceed. *
* * @param label the label to be given to the modifier * @returntrue
to go forward with the transaction,
* false
to bail out
*/
protected boolean verifyModification(TObjectIntPair