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/*
* Copyright 2000-2009 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.util;
import com.intellij.openapi.util.UserDataHolder;
import com.intellij.openapi.util.Key;
import com.intellij.openapi.util.UserDataHolderEx;
import com.intellij.openapi.project.Project;
import com.intellij.psi.util.*;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
/**
* @author ven
*/
public class CachedValuesManagerImpl extends CachedValuesManager {
private final Project myProject;
private final CachedValuesFactory myFactory;
public CachedValuesManagerImpl(Project project, CachedValuesFactory factory) {
myProject = project;
myFactory = factory == null ? new DefaultCachedValuesFactory(project) : factory;
}
@Override
public <T> CachedValue<T> createCachedValue(@NotNull CachedValueProvider<T> provider, boolean trackValue) {
return myFactory.createCachedValue(provider, trackValue);
}
@Override
public <T,P> ParameterizedCachedValue<T,P> createParameterizedCachedValue(@NotNull ParameterizedCachedValueProvider<T,P> provider, boolean trackValue) {
return myFactory.createParameterizedCachedValue(provider, trackValue);
}
@Override
@Nullable
public <T, D extends UserDataHolder> T getCachedValue(@NotNull D dataHolder,
@NotNull Key<CachedValue<T>> key,
@NotNull CachedValueProvider<T> provider,
boolean trackValue) {
CachedValue<T> value;
if (dataHolder instanceof UserDataHolderEx) {
UserDataHolderEx dh = (UserDataHolderEx)dataHolder;
value = dh.getUserData(key);
if (value instanceof CachedValueBase && !((CachedValueBase)value).isFromMyProject(myProject)) {
value = null;
dh.putUserData(key, null);
}
if (value == null) {
value = createCachedValue(provider, trackValue);
assert ((CachedValueBase)value).isFromMyProject(myProject);
value = dh.putUserDataIfAbsent(key, value);
}
}
else {
synchronized (dataHolder) {
value = dataHolder.getUserData(key);
if (value instanceof CachedValueBase && !((CachedValueBase)value).isFromMyProject(myProject)) {
value = null;
}
if (value == null) {
value = createCachedValue(provider, trackValue);
dataHolder.putUserData(key, value);
}
}
}
return value.getValue();
}
public Project getProject() {
return myProject;
}
}
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