/*
* 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.persistence.util;
import org.apache.jackrabbit.core.id.PropertyId;
import java.io.InputStream;
/**
* <code>BLOBStore</code> represents an abstract store for binary property
* values (BLOBs).
* <p>
* Note that The DataStore should nowadays be used instead of the BLOBStore.
* This interface and the implementing classes are kept mostly for backwards
* compatibility.
*
* @see ResourceBasedBLOBStore
*/
public interface BLOBStore {
/**
* Creates a unique identifier for the BLOB data associated with the given
* property id and value subscript.
*
* @param id id of the property associated with the BLOB data
* @param index subscript of the value holding the BLOB data
* @return a string identifying the BLOB data
*/
String createId(PropertyId id, int index);
/**
* Stores the BLOB data and returns a unique identifier.
*
* @param blobId identifier of the BLOB data as returned by
* {@link #createId(PropertyId, int)}
* @param in stream containing the BLOB data
* @param size size of the BLOB data
* @throws Exception if an error occured
*/
void put(String blobId, InputStream in, long size) throws Exception;
/**
* Retrieves the BLOB data with the specified id as a binary stream.
*
* @param blobId identifier of the BLOB data as returned by
* {@link #createId(PropertyId, int)}
* @return an input stream that delivers the BLOB data
* @throws Exception if an error occured
*/
InputStream get(String blobId) throws Exception;
/**
* Removes the BLOB data with the specified id.
*
* @param blobId identifier of the BLOB data as returned by
* {@link #createId(PropertyId, int)}
* @return <code>true</code> if BLOB data with the given id exists and has
* been successfully removed, <code>false</code> if there's no BLOB
* data with the given id.
* @throws Exception if an error occured
*/
boolean remove(String blobId) throws Exception;
}