java.fedora.server.storage.DirectoryBasedRepositoryReader Maven / Gradle / Ivy
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/*
* -----------------------------------------------------------------------------
*
* License and Copyright: The contents of this file are subject to 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.fedora-commons.org/licenses.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
* the specific language governing rights and limitations under the License.
*
* The entire file consists of original code.
* Copyright © 2008 Fedora Commons, Inc.
*
Copyright © 2002-2007 The Rector and Visitors of the University of
* Virginia and Cornell University
* All rights reserved.
*
* -----------------------------------------------------------------------------
*/
package fedora.server.storage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import org.apache.log4j.Logger;
import fedora.server.Context;
import fedora.server.errors.ObjectNotFoundException;
import fedora.server.errors.ObjectIntegrityException;
import fedora.server.errors.ServerException;
import fedora.server.errors.StorageDeviceException;
import fedora.server.errors.StreamIOException;
import fedora.server.errors.UnsupportedTranslationException;
import fedora.server.storage.translation.DOTranslator;
/**
* A RepositoryReader that uses a directory of serialized
* objects as its working repository.
*
* All files in the directory must be digital object serializations,
* and none may have the same PID. This is verified upon construction.
*
* Note: This implementation does not recognize when files are added
* to the directory. What is in the directory at construction-time
* is what is assumed to be the extent of the repository for the life
* of the object.
*
* @author [email protected]
* @version $Id: DirectoryBasedRepositoryReader.java 5220 2006-11-20 13:52:20Z cwilper $
*/
public class DirectoryBasedRepositoryReader
implements RepositoryReader {
/** Logger for this class. */
private static final Logger LOG = Logger.getLogger(
DirectoryBasedRepositoryReader.class.getName());
private File m_directory;
private DOTranslator m_translator;
private String m_exportFormat;
private String m_storageFormat;
private String m_encoding;
private HashMap m_files=new HashMap();
/**
* Initializes the RepositoryReader by looking at all files in the
* provided directory and ensuring that they're all serialized
* digital objects and that there are no PID conflicts.
*
* @param directory the directory where this repository is based.
* @param translator the serialization/deserialization engine for objects.
* @param exportFormat the format to use for exportObject requests.
* @param storageFormat the format of the objects on disk.
* @param encoding The character encoding used across all formats.
*/
public DirectoryBasedRepositoryReader(File directory, DOTranslator translator,
String exportFormat, String storageFormat,
String encoding)
throws StorageDeviceException, ObjectIntegrityException,
StreamIOException, UnsupportedTranslationException,
ServerException {
m_directory=directory;
m_translator=translator;
m_exportFormat=exportFormat;
m_storageFormat=storageFormat;
m_encoding=encoding;
File[] files=directory.listFiles();
if (!directory.isDirectory()) {
throw new StorageDeviceException("Repository storage directory not found.");
}
try {
for (int i=0; i