| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.jackrabbit.oak.plugins.index.progress; |
| |
| import org.apache.jackrabbit.oak.api.CommitFailedException; |
| import org.apache.jackrabbit.oak.api.PropertyState; |
| import org.apache.jackrabbit.oak.commons.PathUtils; |
| import org.apache.jackrabbit.oak.plugins.index.NodeTraversalCallback; |
| import org.apache.jackrabbit.oak.spi.commit.Editor; |
| import org.apache.jackrabbit.oak.spi.state.NodeState; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Editor to track traversal and notify the callback for each node traversed. |
| * The editor also ensures that path is lazily constructed |
| */ |
| class ProgressTrackingEditor implements Editor, NodeTraversalCallback.PathSource { |
| private final Editor editor; |
| private final NodeTraversalCallback traversalCallback; |
| private final ProgressTrackingEditor parent; |
| private final String name; |
| |
| public ProgressTrackingEditor(Editor editor, String name, NodeTraversalCallback traversalCallback) { |
| this.editor = editor; |
| this.name = name; |
| this.traversalCallback = traversalCallback; |
| this.parent = null; |
| } |
| |
| private ProgressTrackingEditor(Editor editor, String name, NodeTraversalCallback callback, |
| ProgressTrackingEditor parent) { |
| this.editor = editor; |
| this.name = name; |
| this.traversalCallback = callback; |
| this.parent = parent; |
| } |
| |
| @Nullable |
| public static Editor wrap(@Nullable Editor editor, NodeTraversalCallback onProgress) { |
| if (editor != null && !(editor instanceof ProgressTrackingEditor)) { |
| return new ProgressTrackingEditor(editor, "/", onProgress); |
| } |
| return editor; |
| } |
| |
| @Override |
| public void enter(NodeState before, NodeState after) throws CommitFailedException { |
| traversalCallback.traversedNode(this); |
| editor.enter(before, after); |
| } |
| |
| @Override |
| public void leave(NodeState before, NodeState after) throws CommitFailedException { |
| editor.leave(before, after); |
| } |
| |
| @Override |
| public void propertyAdded(PropertyState after) throws CommitFailedException { |
| editor.propertyAdded(after); |
| } |
| |
| @Override |
| public void propertyChanged(PropertyState before, PropertyState after) throws CommitFailedException { |
| editor.propertyChanged(before, after); |
| } |
| |
| @Override |
| public void propertyDeleted(PropertyState before) throws CommitFailedException { |
| editor.propertyDeleted(before); |
| } |
| |
| @Override |
| public Editor childNodeAdded(String name, NodeState after) throws CommitFailedException { |
| return createChildEditor(editor.childNodeAdded(name, after), name); |
| } |
| |
| @Override |
| public Editor childNodeChanged(String name, NodeState before, NodeState after) throws CommitFailedException { |
| return createChildEditor(editor.childNodeChanged(name, before, after), name); |
| } |
| |
| @Override |
| public Editor childNodeDeleted(String name, NodeState before) throws CommitFailedException { |
| return createChildEditor(editor.childNodeDeleted(name, before), name); |
| } |
| |
| public String getPath() { |
| if (parent == null) { |
| return PathUtils.ROOT_PATH; |
| } else { |
| StringBuilder sb = new StringBuilder(128); |
| buildPath(sb); |
| return sb.toString(); |
| } |
| } |
| |
| private void buildPath(@NotNull StringBuilder sb) { |
| if (parent != null) { |
| parent.buildPath(sb); |
| sb.append('/').append(name); |
| } |
| } |
| |
| private ProgressTrackingEditor createChildEditor(Editor editor, String name) { |
| if (editor == null) { |
| return null; |
| } else { |
| return new ProgressTrackingEditor(editor, name, traversalCallback, this); |
| } |
| } |
| } |