1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
/*
* Copyright 2000-2014 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.psi.util;
import com.intellij.openapi.components.ServiceManager;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Key;
import com.intellij.openapi.util.NotNullLazyKey;
import com.intellij.openapi.util.UserDataHolder;
import com.intellij.openapi.util.UserDataHolderEx;
import com.intellij.psi.PsiElement;
import com.intellij.util.ConcurrencyUtil;
import com.intellij.util.containers.ConcurrentHashMap;
import org.jetbrains.annotations.NotNull;
import java.util.concurrent.ConcurrentMap;
public abstract class CachedValuesManager {
private static final NotNullLazyKey<CachedValuesManager, Project> INSTANCE_KEY = ServiceManager.createLazyKey(CachedValuesManager.class);
public static CachedValuesManager getManager(@NotNull Project project) {
return INSTANCE_KEY.getValue(project);
}
/**
* Creates new CachedValue instance with given provider.
*
* @param provider computes values.
* @param trackValue if value tracking required. T should be trackable in this case.
* @return new CachedValue instance.
*/
@NotNull
public abstract <T> CachedValue<T> createCachedValue(@NotNull CachedValueProvider<T> provider, boolean trackValue);
@NotNull
public abstract <T,P> ParameterizedCachedValue<T,P> createParameterizedCachedValue(@NotNull ParameterizedCachedValueProvider<T,P> provider, boolean trackValue);
@NotNull
public <T> CachedValue<T> createCachedValue(@NotNull CachedValueProvider<T> provider) {
return createCachedValue(provider, true);
}
public <T, D extends UserDataHolder, P> T getParameterizedCachedValue(@NotNull D dataHolder,
@NotNull Key<ParameterizedCachedValue<T,P>> key,
@NotNull ParameterizedCachedValueProvider<T, P> provider,
boolean trackValue,
P parameter) {
ParameterizedCachedValue<T,P> value;
if (dataHolder instanceof UserDataHolderEx) {
UserDataHolderEx dh = (UserDataHolderEx)dataHolder;
value = dh.getUserData(key);
if (value == null) {
value = createParameterizedCachedValue(provider, trackValue);
value = dh.putUserDataIfAbsent(key, value);
}
}
else {
synchronized (dataHolder) {
value = dataHolder.getUserData(key);
if (value == null) {
value = createParameterizedCachedValue(provider, trackValue);
dataHolder.putUserData(key, value);
}
}
}
return value.getValue(parameter);
}
/**
* Utility method storing created cached values in a {@link com.intellij.openapi.util.UserDataHolder}.
*
* @param dataHolder holder to store the cached value, e.g. a PsiElement.
* @param key key to store the cached value.
* @param provider provider creating the cached value.
* @param trackValue if value tracking required. T should be trackable in this case.
* @return up-to-date value.
*/
public abstract <T, D extends UserDataHolder> T getCachedValue(@NotNull D dataHolder,
@NotNull Key<CachedValue<T>> key,
@NotNull CachedValueProvider<T> provider,
boolean trackValue);
public <T, D extends UserDataHolder> T getCachedValue(@NotNull D dataHolder, @NotNull CachedValueProvider<T> provider) {
return getCachedValue(dataHolder, this.<T>getKeyForClass(provider.getClass()), provider, false);
}
public static <T> T getCachedValue(@NotNull PsiElement psi, @NotNull CachedValueProvider<T> provider) {
CachedValuesManager manager = getManager(psi.getProject());
return manager.getCachedValue(psi, manager.<T>getKeyForClass(provider.getClass()), provider, false);
}
private final ConcurrentMap<String, Key<CachedValue>> keyForProvider = new ConcurrentHashMap<String, Key<CachedValue>>();
@NotNull
public <T> Key<CachedValue<T>> getKeyForClass(@NotNull Class<?> providerClass) {
String name = providerClass.getName();
assert name != null : providerClass + " doesn't have a name; can't be used for cache value provider";
Key<CachedValue> key = keyForProvider.get(name);
if (key == null) {
key = ConcurrencyUtil.cacheOrGet(keyForProvider, name, Key.<CachedValue>create(name));
}
//noinspection unchecked
return (Key)key;
}
}
|
