/*
* Copyright 2000-2015 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 com.intellij.codeInsight.daemon.impl;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.util.pico.CachingConstructorInjectionComponentAdapter;
import gnu.trove.THashMap;
import org.jetbrains.annotations.NotNull;
import org.picocontainer.PicoContainer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/**
* User: cdr
*/
abstract class ThreadLocalAnnotatorMap<K, V> {
private volatile int version;
@NotNull
public abstract Collection<V> initialValue(@NotNull K key);
private static class VersionedMap<K, V> extends THashMap<K, List<V>> {
private final int version;
private VersionedMap(int version) {
this.version = version;
}
}
private final ThreadLocal<VersionedMap<K, V>> CACHE = new ThreadLocal<VersionedMap<K, V>>(){
@Override
protected VersionedMap<K, V> initialValue() {
return new VersionedMap<>(version);
}
};
@SuppressWarnings("unchecked")
@NotNull
private List<V> cloneTemplates(@NotNull Collection<V> templates) {
List<V> result = new ArrayList<>(templates.size());
PicoContainer container = ApplicationManager.getApplication().getPicoContainer();
for (V template : templates) {
Class<? extends V> aClass = (Class<? extends V>)template.getClass();
V clone = (V)new CachingConstructorInjectionComponentAdapter(aClass.getName(), aClass).getComponentInstance(container);
result.add(clone);
}
return result;
}
@NotNull
public List<V> get(@NotNull K key) {
VersionedMap<K, V> map = CACHE.get();
if (version != map.version) {
CACHE.remove();
map = CACHE.get();
}
List<V> cached = map.get(key);
if (cached == null) {
Collection<V> templates = initialValue(key);
cached = cloneTemplates(templates);
map.put(key, cached);
}
return cached;
}
public void clear() {
version++; //we don't care about atomicity here
}
}