/*
* Copyright (c) 2011 Google Inc.
*
* 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
*/
package com.google.eclipse.protobuf.scoping;
import static java.util.Collections.emptySet;
import com.google.eclipse.protobuf.model.util.Options;
import com.google.eclipse.protobuf.protobuf.AbstractCustomOption;
import com.google.eclipse.protobuf.protobuf.ComplexValue;
import com.google.eclipse.protobuf.protobuf.ComplexValueField;
import com.google.eclipse.protobuf.protobuf.FieldName;
import com.google.eclipse.protobuf.protobuf.IndexedElement;
import com.google.inject.Inject;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.xtext.resource.IEObjectDescription;
import java.util.Collection;
/**
* @author alruiz@google.com (Alex Ruiz)
*/
class CustomOptionFieldNameFinder {
@Inject private Options options;
Collection<IEObjectDescription> findFieldNamesSources(ComplexValue value, FinderStrategy strategy) {
IndexedElement source = sourceOf(value);
if (source == null) {
return emptySet();
}
return strategy.findMessageFields(source);
}
private IndexedElement sourceOf(ComplexValue value) {
IndexedElement source = null;
EObject container = value.eContainer();
if (container instanceof AbstractCustomOption) {
AbstractCustomOption option = (AbstractCustomOption) container;
source = options.sourceOf(option);
}
if (container instanceof ComplexValueField) {
source = sourceOfNameOf((ComplexValueField) container);
}
return source;
}
private IndexedElement sourceOfNameOf(ComplexValueField field) {
FieldName name = field.getName();
return (name == null) ? null : name.getTarget();
}
static interface FinderStrategy {
Collection<IEObjectDescription> findMessageFields(IndexedElement reference);
}
}