org.jetbrains.jet.codegen.ClassBuilderOnDemand Maven / Gradle / Ivy
/*
* Copyright 2010-2013 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 org.jetbrains.jet.codegen;
import com.google.common.collect.Lists;
import org.jetbrains.annotations.NotNull;
import java.util.List;
public abstract class ClassBuilderOnDemand {
private ClassBuilder classBuilder;
private final List optionalDeclarations = Lists.newArrayList();
interface ClassBuilderCallback {
void doSomething(@NotNull ClassBuilder classBuilder);
}
@NotNull
protected abstract ClassBuilder createClassBuilder();
public void addOptionalDeclaration(@NotNull ClassBuilderCallback callback) {
optionalDeclarations.add(callback);
if (classBuilder != null) {
callback.doSomething(classBuilder);
}
}
@NotNull
public ClassBuilder getClassBuilder() {
if (classBuilder == null) {
classBuilder = createClassBuilder();
for (ClassBuilderCallback callback : optionalDeclarations) {
callback.doSomething(classBuilder);
}
}
return classBuilder;
}
public void done() {
if (classBuilder != null) {
classBuilder.done();
}
}
public boolean isActivated() {
return classBuilder != null;
}
}