| /* |
| * 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.segment; |
| |
| import com.google.common.base.Supplier; |
| import org.apache.jackrabbit.oak.api.PropertyState; |
| import org.apache.jackrabbit.oak.spi.state.NodeState; |
| import org.apache.jackrabbit.oak.spi.state.NodeStateDiff; |
| |
| /** |
| * A {@code NodeStateDiff} that cancels itself when a condition occurs. The |
| * condition is represented by an externally provided instance of {@code |
| * Supplier}. If the {@code Supplier} returns {@code true}, the diffing process |
| * will be canceled at the first possible occasion. |
| */ |
| public class CancelableDiff implements NodeStateDiff { |
| |
| private final NodeStateDiff delegate; |
| |
| private final Supplier<Boolean> canceled; |
| |
| public CancelableDiff(NodeStateDiff delegate, Supplier<Boolean> canceled) { |
| this.delegate = delegate; |
| this.canceled = canceled; |
| } |
| |
| @Override |
| public final boolean propertyAdded(PropertyState after) { |
| if (canceled.get()) { |
| return false; |
| } |
| |
| return delegate.propertyAdded(after); |
| } |
| |
| @Override |
| public final boolean propertyChanged(PropertyState before, PropertyState after) { |
| if (canceled.get()) { |
| return false; |
| } |
| |
| return delegate.propertyChanged(before, after); |
| } |
| |
| @Override |
| public final boolean propertyDeleted(PropertyState before) { |
| if (canceled.get()) { |
| return false; |
| } |
| |
| return delegate.propertyDeleted(before); |
| } |
| |
| @Override |
| public final boolean childNodeAdded(String name, NodeState after) { |
| if (canceled.get()) { |
| return false; |
| } |
| |
| return delegate.childNodeAdded(name, after); |
| } |
| |
| @Override |
| public final boolean childNodeChanged(String name, NodeState before, NodeState after) { |
| if (canceled.get()) { |
| return false; |
| } |
| |
| return delegate.childNodeChanged(name, before, after); |
| } |
| |
| @Override |
| public final boolean childNodeDeleted(String name, NodeState before) { |
| if (canceled.get()) { |
| return false; |
| } |
| |
| return delegate.childNodeDeleted(name, before); |
| } |
| |
| } |