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keep method signatures on soft references

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peter
2012-03-14 16:52:38 +04:00
parent 9dd4dc3630
commit 03ef367fc5
1 changed files with 13 additions and 24 deletions
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platform/core-api/src/com/intellij/psi/util/PsiCacheKey.java
+13 -24
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@@ -21,14 +21,14 @@ package com.intellij.psi.util;
import com.intellij.openapi.util.Key;
import com.intellij.openapi.util.Pair;
import com.intellij.openapi.util.UserDataHolderEx;
import com.intellij.psi.PsiElement;
import com.intellij.reference.SoftReference;
import com.intellij.util.Function;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
public class PsiCacheKey<T,H extends PsiElement> extends Key<Pair<Long, T>> {
public class PsiCacheKey<T,H extends PsiElement> extends Key<SoftReference<Pair<Long, T>>> {
private final Function<H,T> myFunction;
private PsiCacheKey(@NonNls @NotNull String name, @NotNull Function<H, T> function) {
@@ -37,33 +37,22 @@ public class PsiCacheKey<T,H extends PsiElement> extends Key<Pair<Long, T>> {
}
public final T getValue(@NotNull H h) {
while (true) {
Pair<Long, T> data = h.getUserData(this);
final long count = h.getManager().getModificationTracker().getJavaStructureModificationCount();
if (data == null) {
data = new Pair<Long, T>(count, myFunction.fun(h));
data = ((UserDataHolderEx)h).putUserDataIfAbsent(this, data);
}
else if (data.getFirst() != count) {
Pair<Long, T> newData = new Pair<Long, T>(count, myFunction.fun(h));
if (((UserDataHolderEx)h).replace(this, data, newData)) {
data = newData;
}
else {
continue;
}
}
return data.getSecond();
T result = getCachedValueOrNull(h);
if (result != null) {
return result;
}
result = myFunction.fun(h);
final long count = h.getManager().getModificationTracker().getJavaStructureModificationCount();
h.putUserData(this, new SoftReference<Pair<Long, T>>(new Pair<Long, T>(count, result)));
return result;
}
@Nullable
public final T getCachedValueOrNull(@NotNull H h) {
Pair<Long, T> data = h.getUserData(this);
final long count = h.getManager().getModificationTracker().getJavaStructureModificationCount();
if (data == null || data.getFirst() != count) {
SoftReference<Pair<Long, T>> ref = h.getUserData(this);
Pair<Long, T> data = ref == null ? null : ref.get();
if (data == null || data.getFirst() != h.getManager().getModificationTracker().getJavaStructureModificationCount()) {
return null;
}