/*
* 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.core.state;
import org.apache.jackrabbit.core.id.ItemId;
import org.apache.jackrabbit.core.id.NodeId;
/**
* The <code>ItemStateManager</code> interface provides methods for retrieving
* <code>ItemState</code> and <code>NodeReferences</code> instances by id.
*/
public interface ItemStateManager {
/**
* Return an item state, given its item id.
* @param id item id
* @return item state
* @throws NoSuchItemStateException if the item does not exist
* @throws ItemStateException if an error occurs
*/
ItemState getItemState(ItemId id)
throws NoSuchItemStateException, ItemStateException;
/**
* Return a flag indicating whether an item state for a given
* item id exists.
* @param id item id
* @return <code>true</code> if an item state exists,
* otherwise <code>false</code>
*/
boolean hasItemState(ItemId id);
/**
* Return a node references object, given its target id
* @param id target id
* @return node references object
* @throws NoSuchItemStateException if the item does not exist
* @throws ItemStateException if an error occurs
*/
NodeReferences getNodeReferences(NodeId id)
throws NoSuchItemStateException, ItemStateException;
/**
* Return a flag indicating whether a node references object
* for a given target id exists.
* @param id target id
* @return <code>true</code> if a node reference object exists for the given
* id, otherwise <code>false</code>.
*/
boolean hasNodeReferences(NodeId id);
}