org.mycore.common.content.MCRPathContent Maven / Gradle / Ivy
/*
* This file is part of *** M y C o R e ***
* See http://www.mycore.de/ for details.
*
* MyCoRe is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* MyCoRe is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MyCoRe. If not, see .
*/
package org.mycore.common.content;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.SeekableByteChannel;
import java.nio.file.CopyOption;
import java.nio.file.FileSystem;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
import java.nio.file.StandardOpenOption;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Objects;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.mycore.datamodel.niofs.MCRFileAttributes;
/**
* MCRContent implementation that uses Java 7 {@link FileSystem} features.
*
* @author Thomas Scheffler (yagee)
*/
public class MCRPathContent extends MCRContent implements MCRSeekableChannelContent {
private static final Logger LOGGER = LogManager.getLogger();
private Path path;
private BasicFileAttributes attrs;
private static int BUFFER_SIZE = 8192;
public MCRPathContent(Path path) {
this(path, null);
}
public MCRPathContent(Path path, BasicFileAttributes attrs) {
this.path = Objects.requireNonNull(path).toAbsolutePath().normalize();
this.attrs = attrs;
}
/* (non-Javadoc)
* @see org.mycore.common.content.MCRSeekableChannelContent#getSeekableByteChannel()
*/
@Override
public SeekableByteChannel getSeekableByteChannel() throws IOException {
return Files.newByteChannel(path, StandardOpenOption.READ);
}
@Override
public InputStream getInputStream() throws IOException {
return Files.newInputStream(path, StandardOpenOption.READ);
}
@Override
public ReadableByteChannel getReadableByteChannel() throws IOException {
return getSeekableByteChannel();
}
@Override
public byte[] asByteArray() throws IOException {
return Files.readAllBytes(path);
}
@Override
public long length() throws IOException {
return attrs != null ? attrs.size() : Files.size(path);
}
@Override
public long lastModified() throws IOException {
return (attrs != null ? attrs.lastModifiedTime() : Files.getLastModifiedTime(path)).toMillis();
}
@Override
public String getETag() throws IOException {
if (attrs instanceof MCRFileAttributes) {
return ((MCRFileAttributes) attrs).md5sum();
}
if (Files.getFileStore(path).supportsFileAttributeView("md5")) {
Object fileKey = Files.getAttribute(path, "md5:md5");
if (fileKey instanceof String) {
return fileKey.toString();
}
}
return super.getETag();
}
@Override
public String getMimeType() throws IOException {
return mimeType == null ? Files.probeContentType(path) : mimeType;
}
@Override
public String getSystemId() {
return path.toUri().toString();
}
@Override
public String getName() {
return name == null ? path.getFileName().toString() : super.getName();
}
@Override
public void sendTo(OutputStream out) throws IOException {
Files.copy(path, out);
}
@Override
public void sendTo(File target) throws IOException {
Files.copy(path, target.toPath(), StandardCopyOption.REPLACE_EXISTING);
}
@Override
public void sendTo(Path target, CopyOption... options) throws IOException {
Files.copy(path, target, options);
}
}