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file util: don't load a traverser until it's needed

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GitOrigin-RevId: 9e7ab9650008d8e0272bf178b73f6f4e173c274c
This commit is contained in:
Sergey Ignatov
2019-05-29 21:08:06 +03:00
committed by intellij-monorepo-bot
parent cea97b4ca4
commit 7a5801c70c
1 changed files with 7 additions and 6 deletions
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platform/util/src/com/intellij/openapi/util/io/FileUtil.java
+7 -6
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@@ -7,7 +7,6 @@ import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.util.Condition;
import com.intellij.openapi.util.SystemInfo;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.openapi.util.text.StringUtilRt;
import com.intellij.util.*;
import com.intellij.util.concurrency.FixedFuture;
import com.intellij.util.containers.ContainerUtil;
@@ -1088,13 +1087,15 @@ public class FileUtil extends FileUtilRt {
}
}
@NotNull
public static JBTreeTraverser<File> fileTraverser(@Nullable File root) {
return FILE_TRAVERSER.withRoot(root);
private static class Lazy {
private static final JBTreeTraverser<File> FILE_TRAVERSER = JBTreeTraverser.from(
(Function<File, Iterable<File>>)file -> file == null ? Collections.emptySet() : JBIterable.of(file.listFiles()));
}
private static final JBTreeTraverser<File> FILE_TRAVERSER = JBTreeTraverser.from(
(Function<File, Iterable<File>>)file -> file == null ? Collections.emptySet() : JBIterable.of(file.listFiles()));
@NotNull
public static JBTreeTraverser<File> fileTraverser(@Nullable File root) {
return Lazy.FILE_TRAVERSER.withRoot(root);
}
public static boolean processFilesRecursively(@NotNull File root, @NotNull Processor<? super File> processor) {
return fileTraverser(root).bfsTraversal().processEach(processor);