org.apache.jackrabbit.vault.fs.api.ItemFilterSet Maven / Gradle / Ivy
/*
* 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.vault.fs.api;
import java.util.List;
import javax.jcr.Item;
import javax.jcr.RepositoryException;
/**
* The item filter set holds a set of item filters each attributes as include
* or exclude filter. The evaluation of the set allows included items and
* rejects excluded items.
*
* Additionally it contains a "root" path for which the filters are evaluated.
* if an item has not the node addressed by the root path as ancestor, it is
* always excluded.
*
*/
public class ItemFilterSet extends FilterSet {
/**
* The include all item filter set
*/
public static final ItemFilterSet INCLUDE_ALL =
(ItemFilterSet) new ItemFilterSet().addInclude(ItemFilter.ALL).seal();
/**
* The exclude all item filter set
*/
public static final ItemFilterSet EXCLUDE_ALL =
(ItemFilterSet) new ItemFilterSet().addExclude(ItemFilter.ALL).seal();
/**
* Default constructor. initializes the root path to "/"
*/
public ItemFilterSet() {
super();
}
/**
* Creates a new item filter set and sets the respective root path
* @param root path
*/
public ItemFilterSet(String root) {
super(root);
}
/**
* Evaluates the filters if this set does {@link #covers(String) cover} the
* given item. otherwise {@code false} is returned.
* The result of the evaluation is the polarity of the last matched item.
* If no filter matches it returns {@code true}
* if the first filter is an exclude filter or if no filter is defined;
* {@code false} if the first filter is an include filter.
*
* @param item the item to check
* @param depth the depth to check
* @return {@code true} if this set matches the item
* @throws RepositoryException if an error occurs.
*/
public boolean contains(Item item, int depth) throws RepositoryException {
return contains(item, null, depth);
}
/**
* Evaluates the filters if this set does {@link #covers(String) cover} the
* given item. otherwise {@code false} is returned.
* The result of the evaluation is the polarity of the last matched item.
* If no filter matches it returns {@code true}
* if the first filter is an exclude filter or if no filter is defined;
* {@code false} if the first filter is an include filter.
*
* @param item the item to check
* @param path of the item or {@code null}
* @param depth the depth to check
* @return {@code true} if this set matches the item
* @throws RepositoryException if an error occurs.
*/
public boolean contains(Item item, String path, int depth) throws RepositoryException {
if (path == null) {
path = item.getPath();
}
if (!covers(path)) {
return false;
}
List> entries = getEntries();
if (entries.isEmpty()) {
return true;
} else {
boolean result = !entries.get(0).include;
for (Entry entry: entries) {
if (entry.filter.matches(item, depth)) {
result = entry.include;
}
}
return result;
}
}
}