.kotlin.kotlin-compiler.1.3.11.source-code.Generator Maven / Gradle / Ivy
/*
* Copyright 2010-2015 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.kotlin.js.translate.context.generator;
import com.google.common.collect.Lists;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.kotlin.descriptors.DeclarationDescriptor;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class Generator {
@NotNull
private final Map values = new HashMap<>();
@NotNull
private final List> rules = Lists.newArrayList();
protected final void addRule(@NotNull Rule rule) {
rules.add(rule);
}
@Nullable
public V get(@NotNull DeclarationDescriptor descriptor) {
V result = values.get(descriptor);
if (result != null) {
return result;
}
result = generate(descriptor);
values.put(descriptor, result);
return result;
}
@Nullable
private V generate(@NotNull DeclarationDescriptor descriptor) {
for (Rule rule : rules) {
V result = rule.apply(descriptor);
if (result != null) {
return result;
}
}
return null;
}
}