org.apache.jackrabbit.oak.plugins.tika.CSVFileBinaryResourceProvider 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.oak.plugins.tika;
import java.io.Closeable;
import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import org.apache.jackrabbit.guava.common.base.Function;
import org.apache.jackrabbit.guava.common.base.Predicate;
import org.apache.jackrabbit.guava.common.collect.FluentIterable;
import org.apache.jackrabbit.guava.common.io.Closer;
import org.apache.jackrabbit.guava.common.primitives.Longs;
import org.apache.commons.csv.CSVFormat;
import org.apache.commons.csv.CSVParser;
import org.apache.commons.csv.CSVRecord;
import org.apache.jackrabbit.oak.commons.PathUtils;
import org.apache.jackrabbit.oak.spi.blob.BlobStore;
import org.jetbrains.annotations.Nullable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.apache.jackrabbit.guava.common.base.Preconditions.checkArgument;
import static org.apache.jackrabbit.guava.common.base.Predicates.notNull;
import static org.apache.jackrabbit.JcrConstants.JCR_ENCODING;
import static org.apache.jackrabbit.JcrConstants.JCR_MIMETYPE;
import static org.apache.jackrabbit.JcrConstants.JCR_PATH;
class CSVFileBinaryResourceProvider implements BinaryResourceProvider, Closeable {
private static final String BLOB_ID = "blobId";
private static final String LENGTH = "length";
static final CSVFormat FORMAT = CSVFormat.DEFAULT
.withCommentMarker('#')
.withHeader(
BLOB_ID,
LENGTH,
JCR_MIMETYPE,
JCR_ENCODING,
JCR_PATH
)
.withNullString("") //Empty string are considered as null
.withIgnoreSurroundingSpaces()
.withSkipHeaderRecord();
private final Logger log = LoggerFactory.getLogger(getClass());
private final File dataFile;
private final BlobStore blobStore;
private final Closer closer = Closer.create();
public CSVFileBinaryResourceProvider(File dataFile, @Nullable BlobStore blobStore) {
checkArgument(dataFile.exists(), "Data file %s does not exist", dataFile);
this.dataFile = dataFile;
this.blobStore = blobStore;
}
@Override
public FluentIterable getBinaries(final String path) throws IOException {
CSVParser parser = CSVParser.parse(dataFile, StandardCharsets.UTF_8, FORMAT);
closer.register(parser);
return FluentIterable.from(parser)
.transform(new RecordTransformer())
.filter(notNull())
.filter(new Predicate() {
@Override
public boolean apply(BinaryResource input) {
return PathUtils.isAncestor(path, input.getPath());
}
});
}
@Override
public void close() throws IOException {
closer.close();
}
private class RecordTransformer implements Function {
@Nullable
@Override
public BinaryResource apply(CSVRecord input) {
String path = input.get(JCR_PATH);
String mimeType = input.get(JCR_MIMETYPE);
String encoding = input.get(JCR_ENCODING);
String blobId = input.get(BLOB_ID);
String length = input.get(LENGTH);
Long len = length != null ? Longs.tryParse(length) : null;
if (path == null || blobId == null || mimeType == null) {
log.warn("Ignoring invalid record {}. Either of mimeType, blobId or path is null", input);
return null;
}
return new BinaryResource(new BlobStoreByteSource(blobStore, blobId, len),
mimeType, encoding, path, blobId);
}
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy