/*
* Copyright 2003-2016 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.generator.runtime;
import jetbrains.mps.generator.impl.GenerationFailureException;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.mps.openapi.language.SAbstractConcept;
import org.jetbrains.mps.openapi.model.SNode;
import org.jetbrains.mps.openapi.model.SNodeReference;
/**
* Base implementation of {@link jetbrains.mps.generator.runtime.TemplateWeavingRule} to use as superclass in generated code
* to facilitate future API changes
* @author Artem Tikhomirov
*/
public abstract class WeaveRuleBase implements TemplateWeavingRule {
private final SNodeReference myRuleNode;
private final SAbstractConcept myAppConcept;
private final boolean myApplyToSubConcepts;
protected WeaveRuleBase(@NotNull SNodeReference ruleNode, @NotNull SAbstractConcept appConcept, boolean applyToSubConcepts) {
myRuleNode = ruleNode;
myAppConcept = appConcept;
myApplyToSubConcepts = applyToSubConcepts;
}
/**
* Subclasses can rely on default implementation to return <code>true</code>.
*/
@Override
public boolean isApplicable(@NotNull TemplateContext context) throws GenerationException {
return true;
}
@NotNull
@Override
public SNodeReference getRuleNode() {
return myRuleNode;
}
@NotNull
@Override
public final SAbstractConcept getApplicableConcept() {
return myAppConcept;
}
@Override
public boolean applyToInheritors() {
return myApplyToSubConcepts;
}
@Nullable
@Override
public SNode getAnchorNode(@NotNull TemplateContext context, @NotNull SNode outputParent, @NotNull SNode outputNode) throws GenerationFailureException {
// default implementation, legacy behavior - just append new node to the end of the children list
return null;
}
}