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Replaced DirectoryWalker by FileSystemVisitor

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This commit is contained in:
Markus Kreusch
2015-12-28 23:07:09 +01:00
parent d073bdfad9
commit 260303127e
5 changed files with 80 additions and 78 deletions
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main/filesystem-api/src/main/java/org/cryptomator/filesystem/FileSystemVisitor.java
+45 -8
View File
@@ -1,5 +1,7 @@
package org.cryptomator.filesystem;
import static java.lang.String.format;
import java.util.function.Consumer;
public class FileSystemVisitor {
@@ -7,11 +9,15 @@ public class FileSystemVisitor {
private final Consumer<Folder> beforeFolderVisitor;
private final Consumer<Folder> afterFolderVisitor;
private final Consumer<File> fileVisitor;
private final Consumer<Node> nodeVisitor;
private final int maxDepth;
private FileSystemVisitor(Consumer<Folder> beforeFolderVisitor, Consumer<Folder> afterFolderVisitor, Consumer<File> fileVisitor) {
this.beforeFolderVisitor = beforeFolderVisitor;
this.afterFolderVisitor = afterFolderVisitor;
this.fileVisitor = fileVisitor;
public FileSystemVisitor(FileSystemVisitorBuilder builder) {
this.beforeFolderVisitor = builder.beforeFolderVisitor;
this.afterFolderVisitor = builder.afterFolderVisitor;
this.fileVisitor = builder.fileVisitor;
this.nodeVisitor = builder.nodeVisitor;
this.maxDepth = builder.maxDepth;
}
public static FileSystemVisitorBuilder fileSystemVisitor() {
@@ -19,14 +25,27 @@ public class FileSystemVisitor {
}
public FileSystemVisitor visit(Folder folder) {
return visit(folder, 0);
}
public FileSystemVisitor visit(File file) {
return visit(file, 0);
}
private FileSystemVisitor visit(Folder folder, int depth) {
beforeFolderVisitor.accept(folder);
folder.folders().forEach(this::visit);
folder.files().forEach(this::visit);
nodeVisitor.accept(folder);
final int childDepth = depth + 1;
if (childDepth <= maxDepth) {
folder.folders().forEach(childFolder -> visit(childFolder, childDepth));
folder.files().forEach(childFile -> visit(childFile, childDepth));
}
afterFolderVisitor.accept(folder);
return this;
}
public FileSystemVisitor visit(File file) {
private FileSystemVisitor visit(File file, int depth) {
nodeVisitor.accept(file);
fileVisitor.accept(file);
return this;
}
@@ -36,6 +55,8 @@ public class FileSystemVisitor {
private Consumer<Folder> beforeFolderVisitor = noOp();
private Consumer<Folder> afterFolderVisitor = noOp();
private Consumer<File> fileVisitor = noOp();
private Consumer<Node> nodeVisitor = noOp();
private int maxDepth = Integer.MAX_VALUE;
private FileSystemVisitorBuilder() {
}
@@ -64,6 +85,22 @@ public class FileSystemVisitor {
return this;
}
public FileSystemVisitorBuilder forEachNode(Consumer<Node> nodeVisitor) {
if (nodeVisitor == null) {
throw new IllegalArgumentException("Vistior may not be null");
}
this.nodeVisitor = nodeVisitor;
return this;
}
public FileSystemVisitorBuilder withMaxDepth(int maxDepth) {
if (maxDepth < 0) {
throw new IllegalArgumentException(format("maxDepth must not be smaller 0 but was %d", maxDepth));
}
this.maxDepth = maxDepth;
return this;
}
public FileSystemVisitor visit(Folder folder) {
return build().visit(folder);
}
@@ -73,7 +110,7 @@ public class FileSystemVisitor {
}
public FileSystemVisitor build() {
return new FileSystemVisitor(beforeFolderVisitor, afterFolderVisitor, fileVisitor);
return new FileSystemVisitor(this);
}
private static <T> Consumer<T> noOp() {