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Diffstat (limited to 'eaaf_core_utils/src/main/java/at/gv/egiz/eaaf/core/impl/utils/FileUtils.java')
| -rw-r--r-- | eaaf_core_utils/src/main/java/at/gv/egiz/eaaf/core/impl/utils/FileUtils.java | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/eaaf_core_utils/src/main/java/at/gv/egiz/eaaf/core/impl/utils/FileUtils.java b/eaaf_core_utils/src/main/java/at/gv/egiz/eaaf/core/impl/utils/FileUtils.java new file mode 100644 index 00000000..fff83e53 --- /dev/null +++ b/eaaf_core_utils/src/main/java/at/gv/egiz/eaaf/core/impl/utils/FileUtils.java @@ -0,0 +1,175 @@ +/******************************************************************************* + * Copyright 2017 Graz University of Technology + * EAAF-Core Components has been developed in a cooperation between EGIZ, + * A-SIT Plus, A-SIT, and Graz University of Technology. + * + * Licensed under the EUPL, Version 1.2 or - as soon they will be approved by + * the European Commission - subsequent versions of the EUPL (the "Licence"); + * You may not use this work except in compliance with the Licence. + * You may obtain a copy of the Licence at: + * https://joinup.ec.europa.eu/news/understanding-eupl-v12 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the Licence is distributed on an "AS IS" basis, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the Licence for the specific language governing permissions and + * limitations under the Licence. + * + * This product combines work with different licenses. See the "NOTICE" text + * file for details on the various modules and licenses. + * The "NOTICE" text file is part of the distribution. Any derivative works + * that you distribute must include a readable copy of the "NOTICE" text file. + *******************************************************************************/ +/******************************************************************************* + *******************************************************************************/ +/******************************************************************************* + *******************************************************************************/ + + +package at.gv.egiz.eaaf.core.impl.utils; + +import java.io.BufferedInputStream; +import java.io.File; +import java.io.FileInputStream; +import java.io.FileOutputStream; +import java.io.IOException; +import java.io.InputStream; +import java.io.OutputStream; +import java.net.MalformedURLException; +import java.net.URI; +import java.net.URL; + +import org.apache.commons.lang3.StringUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class FileUtils { + private static final Logger log = LoggerFactory.getLogger(FileUtils.class); + + + /** + * Reads a file, given by URL, into a byte array. + * @param urlString file URL + * @return file content + * @throws IOException on any exception thrown + */ + public static byte[] readURL(String urlString) throws IOException { + final URL url = new URL(urlString); + final InputStream in = new BufferedInputStream(url.openStream()); + final byte[] content = StreamUtils.readStream(in); + in.close(); + return content; + } + + /** + * Reads a file from a resource. + * @param name resource name + * @return file content as a byte array + * @throws IOException on any exception thrown + */ + public static byte[] readResource(String name) throws IOException { + final ClassLoader cl = FileUtils.class.getClassLoader(); + final BufferedInputStream in = new BufferedInputStream(cl.getResourceAsStream(name)); + final byte[] content = StreamUtils.readStream(in); + in.close(); + return content; + } + /** + * Reads a file from a resource. + * @param name filename + * @param encoding character encoding + * @return file content + * @throws IOException on any exception thrown + */ + public static String readResource(String name, String encoding) throws IOException { + final byte[] content = readResource(name); + return new String(content, encoding); + } + + + /** + * Returns the absolute URL of a given url which is relative to the parameter root + * @param url + * @param root + * @return String + * @throws MalformedURLException + */ + public static String makeAbsoluteURL(String url, URI root) throws MalformedURLException { + if (root != null) + return makeAbsoluteURL(url, root.toURL().toString()); + else + return makeAbsoluteURL(url, StringUtils.EMPTY); + + } + + /** + * Returns the absolute URL of a given url which is relative to the parameter root + * @param url + * @param root + * @return String + */ + public static String makeAbsoluteURL(String url, String root) { + //if url is relative to rootConfigFileDirName make it absolute + + log.trace("Making AbsoluteURL URL: " + url + " Root-Path: " + root); + + if (StringUtils.isEmpty(root)) + root = null; + + File keyFile; + String newURL = url; + + if(null == url) return null; + + if (url.startsWith("http:") || url.startsWith("https:") || url.startsWith("file:") || url.startsWith("ftp:")) { + return url; + + } else { + // check if absolute - if not make it absolute + keyFile = new File(url); + if (!keyFile.isAbsolute()) { + keyFile = new File(root, url); + + if (keyFile.toString().startsWith("file:")) + newURL = keyFile.toString(); + + else + newURL = keyFile.toURI().toString(); + + } + return newURL; + } + } + + + private static void copy( InputStream fis, OutputStream fos ) + { + try + { + final byte[] buffer = new byte[ 0xFFFF ]; + for ( int len; (len = fis.read(buffer)) != -1; ) + fos.write( buffer, 0, len ); + } + catch( final IOException e ) { + System.err.println( e ); + } + finally { + if ( fis != null ) + try { fis.close(); } catch ( final IOException e ) { e.printStackTrace(); } + if ( fos != null ) + try { fos.close(); } catch ( final IOException e ) { e.printStackTrace(); } + } + } + + public static void copyFile(File src, File dest) + { + try + { + copy( new FileInputStream( src ), new FileOutputStream( dest ) ); + } + catch( final IOException e ) { + e.printStackTrace(); + } + } + +} |