/*
* 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.oodt.cas.filemgr.versioning;
//JDK imports
import java.io.File;
import java.util.logging.Level;
import java.util.logging.Logger;
//OODT imports
import org.apache.oodt.cas.filemgr.structs.Product;
import org.apache.oodt.cas.filemgr.structs.Reference;
import org.apache.oodt.cas.filemgr.structs.exceptions.VersioningException;
import org.apache.oodt.cas.metadata.Metadata;
/**
* @author mattmann
* @version $Revision$
*
* <p>
* A {@link Versioner} that handles single file {@link Product}s by storing
* them in <code>productTypeRepoPath/Filename</code>.
* </p>
*
*/
public class SingleFileBasicVersioner implements Versioner {
/* filename fields */
public static final String FILENAME_FIELD = "Filename";
/* our log stream */
private static Logger LOG = Logger.getLogger(SingleFileBasicVersioner.class
.getName());
/**
*
*/
public SingleFileBasicVersioner() {
super();
// TODO Auto-generated constructor stub
}
/*
* (non-Javadoc)
*
* @see org.apache.oodt.cas.filemgr.versioning.Versioner#createDataStoreReferences(gov.nasa.
* jpl.oodt.cas.filemgr.structs.Product,
* org.apache.oodt.cas.metadata.Metadata)
*/
public void createDataStoreReferences(Product product, Metadata metadata)
throws VersioningException {
// we only handle single files, so throw exception if product is
// heirarhical
if (!product.getProductStructure().equals(Product.STRUCTURE_FLAT)) {
throw new VersioningException(
"SingleFileVersioner: unable to version" + " Product: ["
+ product.getProductName()
+ "] with heirarchical structure");
}
// we need the Filename Metadata parameter for this to work
String filename = metadata.getMetadata(FILENAME_FIELD);
if (filename == null || (filename != null && filename.equals(""))) {
throw new VersioningException(
"SingleFileVersioner: unable to version without "
+ "Filename metadata field specified!");
}
// now we need the product type repo path
String productTypeRepoPathUri = product.getProductType()
.getProductRepositoryPath();
String productTypeRepoPath = VersioningUtils
.getAbsolutePathFromUri(productTypeRepoPathUri);
if (!productTypeRepoPath.endsWith("/")) {
productTypeRepoPath += "/";
}
// final file location is:
// /productTypeRepoPath/Filename
String dataStorePath = productTypeRepoPath + filename;
String dataStoreRef = new File(dataStorePath).toURI().toString();
// get the first reference back
// set its data store ref
Reference ref = (Reference) product.getProductReferences().get(0);
LOG.log(Level.INFO, "Generated data store ref: [" + dataStoreRef
+ "] from origRef: [" + ref.getOrigReference() + "]");
ref.setDataStoreReference(dataStoreRef);
}
}