| /* |
| * 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.vault.fs; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import javax.jcr.RepositoryException; |
| |
| import org.apache.jackrabbit.vault.fs.api.AccessType; |
| import org.apache.jackrabbit.vault.fs.api.Artifact; |
| import org.apache.jackrabbit.vault.fs.api.VaultFile; |
| import org.apache.jackrabbit.vault.fs.impl.VaultFileImpl; |
| |
| /** |
| * Implements an input stream on a jcr file file. It accesses the artifact of the |
| * platform file an wraps either it's input stream or provides one using a tmp |
| * file. |
| * |
| * If possible, use the {@link VaultFileImpl#getArtifact()} directly. |
| * |
| */ |
| public class VaultFileInputStream extends InputStream { |
| |
| /** |
| * The base input stream |
| */ |
| private final InputStream base; |
| |
| /** |
| * Temp file for spooling |
| */ |
| private File tmpFile; |
| |
| /** |
| * Creates a new input stream on the given file. If the file is a |
| * directory an IOException is thrown. |
| * |
| * @param file the file |
| * @throws IOException if an I/O error occurs. |
| */ |
| public VaultFileInputStream(VaultFile file) throws IOException { |
| Artifact a = file.getArtifact(); |
| if (a == null || a.getPreferredAccess() == AccessType.NONE) { |
| throw new IOException("invalid access."); |
| } |
| try { |
| if (a.getPreferredAccess() == AccessType.STREAM) { |
| base = a.getInputStream(); |
| } else { |
| tmpFile = File.createTempFile("vltfs", ".spool"); |
| try (FileOutputStream out = new FileOutputStream(tmpFile)) { |
| a.spool(out); |
| } |
| base = new FileInputStream(tmpFile); |
| } |
| } catch (RepositoryException e) { |
| throw new IOException(e.toString()); |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int read() throws IOException { |
| return base.read(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int read(byte[] b) throws IOException { |
| return base.read(b); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int read(byte[] b, int off, int len) throws IOException { |
| return base.read(b, off, len); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public long skip(long n) throws IOException { |
| return base.skip(n); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int available() throws IOException { |
| return base.available(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void close() throws IOException { |
| base.close(); |
| if (tmpFile != null) { |
| tmpFile.delete(); |
| tmpFile.deleteOnExit(); |
| tmpFile = null; |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void mark(int readlimit) { |
| base.mark(readlimit); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void reset() throws IOException { |
| base.reset(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean markSupported() { |
| return base.markSupported(); |
| } |
| } |