| /* |
| * 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.observation.filter; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.apache.jackrabbit.oak.plugins.observation.filter.ConstantFilter.EXCLUDE_ALL; |
| import static org.apache.jackrabbit.oak.plugins.observation.filter.ConstantFilter.INCLUDE_ALL; |
| |
| import java.util.List; |
| |
| import com.google.common.collect.Lists; |
| |
| import org.apache.jackrabbit.oak.api.PropertyState; |
| import org.apache.jackrabbit.oak.spi.state.NodeState; |
| import org.jetbrains.annotations.NotNull; |
| |
| /** |
| * This utility class provides common {@link EventFilter} instances |
| */ |
| public final class Filters { |
| |
| private Filters() { |
| } |
| |
| /** |
| * A filter that matches if and only if any the filter passed to this |
| * method does not match. |
| * @param filter filter which must not match |
| * @return {@code true} if {@code filter} does not match. |
| */ |
| @NotNull |
| public static EventFilter not(@NotNull final EventFilter filter) { |
| return new EventFilter() { |
| @Override |
| public boolean includeAdd(PropertyState after) { |
| return !filter.includeAdd(after); |
| } |
| |
| @Override |
| public boolean includeChange(PropertyState before, PropertyState after) { |
| return !filter.includeChange(before, after); |
| } |
| |
| @Override |
| public boolean includeDelete(PropertyState before) { |
| return !filter.includeDelete(before); |
| } |
| |
| @Override |
| public boolean includeAdd(String name, NodeState after) { |
| return !filter.includeAdd(name, after); |
| } |
| |
| @Override |
| public boolean includeDelete(String name, NodeState before) { |
| return !filter.includeDelete(name, before); |
| } |
| |
| @Override |
| public boolean includeMove(String sourcePath, String name, NodeState moved) { |
| return !filter.includeMove(sourcePath, name, moved); |
| } |
| |
| @Override |
| public boolean includeReorder(String destName, String name, NodeState reordered) { |
| return !filter.includeReorder(destName, name, reordered); |
| } |
| |
| @Override |
| public EventFilter create(String name, NodeState before, NodeState after) { |
| EventFilter childFilter = filter.create(name, before, after); |
| return childFilter == null |
| ? INCLUDE_ALL |
| : not(childFilter); |
| } |
| }; |
| } |
| |
| /** |
| * A filter that matches if and only if any of the filters passed to this |
| * method matches. |
| * @param filters filters of which any must match |
| * @return {@code true} if any of {@code filters} match. |
| */ |
| @NotNull |
| public static EventFilter any(@NotNull final EventFilter... filters) { |
| return any(Lists.newArrayList(checkNotNull(filters))); |
| } |
| |
| /** |
| * A filter that matches if and only if all of the filters passed to this |
| * method matches. |
| * @param filters filters of which all must match |
| * @return {@code true} if all of {@code filters} match. |
| */ |
| @NotNull |
| public static EventFilter all(@NotNull final EventFilter... filters) { |
| return all(Lists.newArrayList(checkNotNull(filters))); |
| } |
| |
| /** |
| * @return Filter that includes everything |
| */ |
| @NotNull |
| public static EventFilter includeAll() { |
| return INCLUDE_ALL; |
| } |
| |
| /** |
| * @return Filter that excludes everything |
| */ |
| @NotNull |
| public static EventFilter excludeAll() { |
| return EXCLUDE_ALL; |
| } |
| |
| /** |
| * A filter that matches if and only if any of the filters passed to this |
| * method matches. |
| * @param filters filters of which any must match |
| * @return {@code true} if any of {@code filters} match. |
| */ |
| @NotNull |
| public static EventFilter any(@NotNull final List<EventFilter> filters) { |
| if (checkNotNull(filters).isEmpty()) { |
| return EXCLUDE_ALL; |
| } else if (filters.size() == 1) { |
| return filters.get(0); |
| } else { |
| return new EventFilter() { |
| @Override |
| public boolean includeAdd(PropertyState after) { |
| for (EventFilter filter : filters) { |
| if (filter.includeAdd(after)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean includeChange(PropertyState before, PropertyState after) { |
| for (EventFilter filter : filters) { |
| if (filter.includeChange(before, after)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean includeDelete(PropertyState before) { |
| for (EventFilter filter : filters) { |
| if (filter.includeDelete(before)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean includeAdd(String name, NodeState after) { |
| for (EventFilter filter : filters) { |
| if (filter.includeAdd(name, after)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean includeDelete(String name, NodeState before) { |
| for (EventFilter filter : filters) { |
| if (filter.includeDelete(name, before)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean includeMove(String sourcePath, String name, NodeState moved) { |
| for (EventFilter filter : filters) { |
| if (filter.includeMove(sourcePath, name, moved)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean includeReorder(String destName, String name, NodeState reordered) { |
| for (EventFilter filter : filters) { |
| if (filter.includeReorder(destName, name, reordered)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public EventFilter create(String name, NodeState before, NodeState after) { |
| List<EventFilter> childFilters = Lists.newArrayList(); |
| for (EventFilter filter : filters) { |
| EventFilter childFilter = filter.create(name, before, after); |
| if (childFilter != null) { |
| childFilters.add(childFilter); |
| } |
| } |
| return any(childFilters); |
| } |
| }; |
| } |
| } |
| |
| /** |
| * A filter that matches if and only if all of the filters passed to this |
| * method matches. |
| * @param filters filters of which all must match |
| * @return {@code true} if all of {@code filters} match. |
| */ |
| @NotNull |
| public static EventFilter all(@NotNull final List<EventFilter> filters) { |
| if (checkNotNull(filters).isEmpty()) { |
| return INCLUDE_ALL; |
| } else if (filters.size() == 1) { |
| return filters.get(0); |
| } else { |
| return new EventFilter() { |
| @Override |
| public boolean includeAdd(PropertyState after) { |
| for (EventFilter filter : filters) { |
| if (!filter.includeAdd(after)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean includeChange(PropertyState before, PropertyState after) { |
| for (EventFilter filter : filters) { |
| if (!filter.includeChange(before, after)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean includeDelete(PropertyState before) { |
| for (EventFilter filter : filters) { |
| if (!filter.includeDelete(before)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean includeAdd(String name, NodeState after) { |
| for (EventFilter filter : filters) { |
| if (!filter.includeAdd(name, after)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean includeDelete(String name, NodeState before) { |
| for (EventFilter filter : filters) { |
| if (!filter.includeDelete(name, before)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean includeMove(String sourcePath, String name, NodeState moved) { |
| for (EventFilter filter : filters) { |
| if (!filter.includeMove(sourcePath, name, moved)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean includeReorder(String destName, String name, NodeState reordered) { |
| for (EventFilter filter : filters) { |
| if (!filter.includeReorder(destName, name, reordered)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public EventFilter create(String name, NodeState before, NodeState after) { |
| List<EventFilter> childFilters = Lists.newArrayList(); |
| for (EventFilter filter : filters) { |
| EventFilter childFilter = filter.create(name, before, after); |
| if (childFilter == null) { |
| return null; |
| } else { |
| childFilters.add(childFilter); |
| } |
| } |
| return all(childFilters); |
| } |
| }; |
| } |
| } |
| |
| } |