forked from gradle/gradle
/
SnapshotCollectingDiffListener.java
61 lines (52 loc) · 2.32 KB
/
SnapshotCollectingDiffListener.java
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/*
* Copyright 2020 the original author or authors.
*
* 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 org.gradle.internal.watch.vfs.impl;
import org.gradle.internal.file.FileMetadata.AccessType;
import org.gradle.internal.snapshot.CompleteFileSystemLocationSnapshot;
import org.gradle.internal.snapshot.FileSystemNode;
import org.gradle.internal.snapshot.SnapshotHierarchy;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Consumer;
import java.util.function.Predicate;
public class SnapshotCollectingDiffListener implements SnapshotHierarchy.NodeDiffListener {
private final List<CompleteFileSystemLocationSnapshot> removedSnapshots = new ArrayList<>();
private final List<CompleteFileSystemLocationSnapshot> addedSnapshots = new ArrayList<>();
private final Predicate<String> watchFilter;
public SnapshotCollectingDiffListener(Predicate<String> watchFilter) {
this.watchFilter = watchFilter;
}
public void publishSnapshotDiff(SnapshotHierarchy.SnapshotDiffListener snapshotDiffListener, SnapshotHierarchy root) {
if (!removedSnapshots.isEmpty() || !addedSnapshots.isEmpty()) {
snapshotDiffListener.changed(removedSnapshots, addedSnapshots, root);
}
}
private void extractRootSnapshots(FileSystemNode rootNode, Consumer<CompleteFileSystemLocationSnapshot> consumer) {
rootNode.accept(snapshot -> {
if (snapshot.getAccessType() == AccessType.DIRECT && watchFilter.test(snapshot.getAbsolutePath())) {
consumer.accept(snapshot);
}
});
}
@Override
public void nodeRemoved(FileSystemNode node) {
extractRootSnapshots(node, removedSnapshots::add);
}
@Override
public void nodeAdded(FileSystemNode node) {
extractRootSnapshots(node, addedSnapshots::add);
}
}