| /** |
| * 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.creadur.tentacles; |
| |
| import org.apache.logging.log4j.*; |
| import java.io.*; |
| import java.net.URL; |
| import java.util.zip.ZipInputStream; |
| |
| public class IOSystem { |
| private static final Logger LOG = LogManager.getLogger(IOSystem.class); |
| |
| public String slurp(final File file) throws IOException { |
| final ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| copy(file, out); |
| return new String(out.toByteArray()); |
| } |
| |
| public String slurp(final URL url) throws IOException { |
| final ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| copy(url.openStream(), out); |
| return new String(out.toByteArray()); |
| } |
| |
| public void writeString(final File file, final String string) throws IOException { |
| final FileWriter out = new FileWriter(file); |
| try { |
| final BufferedWriter bufferedWriter = new BufferedWriter(out); |
| try { |
| bufferedWriter.write(string); |
| bufferedWriter.newLine(); |
| } finally { |
| close(bufferedWriter); |
| } |
| } finally { |
| close(out); |
| } |
| } |
| |
| private void copy(final File from, final OutputStream to) throws IOException { |
| final InputStream read = read(from); |
| try { |
| copy(read, to); |
| } finally { |
| close(read); |
| } |
| } |
| |
| public void copy(final InputStream from, final File to) throws IOException { |
| final OutputStream write = write(to); |
| try { |
| copy(from, write); |
| } finally { |
| close(write); |
| } |
| } |
| |
| private void copy(final InputStream from, final OutputStream to) throws IOException { |
| final byte[] buffer = new byte[1024]; |
| int length = 0; |
| while ((length = from.read(buffer)) != -1) { |
| to.write(buffer, 0, length); |
| } |
| to.flush(); |
| } |
| |
| public void copy(final byte[] from, final File to) throws IOException { |
| copy(new ByteArrayInputStream(from), to); |
| } |
| |
| public ZipInputStream unzip(final File file) throws IOException { |
| final InputStream read = read(file); |
| return new ZipInputStream(read); |
| } |
| |
| public void close(final Closeable closeable) throws IOException { |
| if (closeable == null) { |
| return; |
| } |
| try { |
| if (closeable instanceof Flushable) { |
| ((Flushable) closeable).flush(); |
| } |
| } catch (final IOException e) { |
| LOG.trace("Error when trying to flush before closing " + closeable, e); |
| } |
| try { |
| closeable.close(); |
| } catch (final IOException e) { |
| LOG.trace("Error when trying to close " + closeable, e); |
| } |
| } |
| |
| public OutputStream write(final File destination) throws FileNotFoundException { |
| final OutputStream out = new FileOutputStream(destination); |
| return new BufferedOutputStream(out, 32768); |
| } |
| |
| public InputStream read(final File source) throws FileNotFoundException { |
| final InputStream in = new FileInputStream(source); |
| return new BufferedInputStream(in, 32768); |
| } |
| |
| public byte[] read(final InputStream in) throws IOException { |
| final ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| copy(in, out); |
| out.close(); |
| return out.toByteArray(); |
| } |
| } |