/*
* Copyright 2003-2013 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jetbrains.mps.extapi.module;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.mps.openapi.module.SModule;
import org.jetbrains.mps.openapi.module.SModuleFacet;
import org.jetbrains.mps.openapi.persistence.Memento;
/**
* Base class for all module facets.
*/
public abstract class ModuleFacetBase implements SModuleFacet {
private final String myFacetType;
private SModule myModule;
private boolean isRegistered;
protected ModuleFacetBase(@NotNull String facetType) {
myFacetType = facetType;
}
@NotNull
@Override
public final String getFacetType() {
return myFacetType;
}
public String getFacetPresentation() {
return getFacetType();
}
@NotNull
@Override
public SModule getModule() {
return myModule;
}
/**
* FIXME javadoc @return and do we need both setModule + attach?
* Returns null if the facet cannot work within the passed module.
*/
public boolean setModule(SModule module) {
checkNotRegistered();
myModule = module;
return true;
}
protected void checkNotRegistered() {
if (isRegistered()) {
throw new IllegalStateException("cannot change properties of the registered root");
}
}
public boolean isRegistered() {
return isRegistered;
}
public void attach() {
assert myModule != null;
isRegistered = true;
}
public void dispose() {
isRegistered = false;
}
@Override
public void save(Memento memento) {
// no-op
}
@Override
public void load(Memento memento) {
checkNotRegistered();
}
}