2 * Copyright © 2016-2018 European Support Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.openecomp.core.utilities.file;
19 import org.apache.commons.io.FilenameUtils;
20 import org.apache.commons.io.IOUtils;
21 import org.openecomp.core.utilities.json.JsonUtil;
22 import org.openecomp.sdc.tosca.services.YamlUtil;
24 import java.io.ByteArrayInputStream;
26 import java.io.FileOutputStream;
27 import java.io.IOException;
28 import java.io.InputStream;
30 import java.nio.file.Files;
31 import java.nio.file.Path;
32 import java.nio.file.Paths;
33 import java.util.Collections;
34 import java.util.Enumeration;
35 import java.util.HashMap;
36 import java.util.LinkedList;
37 import java.util.List;
39 import java.util.Objects;
40 import java.util.function.Function;
41 import java.util.zip.ZipEntry;
42 import java.util.zip.ZipInputStream;
45 * The type File utils.
47 public class FileUtils {
50 * Allows to consume an input stream open against a resource with a given file name.
52 * @param fileName the file name
53 * @param function logic to be applied to the input stream
55 public static <T> T readViaInputStream(String fileName, Function<InputStream, T> function) {
57 Objects.requireNonNull(fileName);
59 // the leading slash doesn't make sense and doesn't work when used with a class loader
60 URL resource = FileUtils.class.getClassLoader().getResource(fileName.startsWith("/")
61 ? fileName.substring(1) : fileName);
62 if (resource == null) {
63 throw new IllegalArgumentException("Resource not found: " + fileName);
66 return readViaInputStream(resource, function);
70 * Allows to consume an input stream open against a resource with a given URL.
72 * @param urlFile the url file
73 * @param function logic to be applied to the input stream
75 public static <T> T readViaInputStream(URL urlFile, Function<InputStream, T> function) {
77 Objects.requireNonNull(urlFile);
78 try (InputStream is = urlFile.openStream()) {
79 return function.apply(is);
80 } catch (IOException exception) {
81 throw new RuntimeException(exception);
86 * Gets file input streams.
88 * @param fileName the file name
89 * @return the file input streams
91 public static List<URL> getAllLocations(String fileName) {
93 List<URL> urls = new LinkedList<>();
94 Enumeration<URL> urlFiles;
97 urlFiles = FileUtils.class.getClassLoader().getResources(fileName);
98 while (urlFiles.hasMoreElements()) {
99 urls.add(urlFiles.nextElement());
103 } catch (IOException exception) {
104 throw new RuntimeException(exception);
107 return urls.isEmpty() ? Collections.emptyList() : Collections.unmodifiableList(urls);
111 * Convert to bytes byte [ ].
113 * @param object the object
114 * @param extension the extension
115 * @return the byte [ ]
117 public static byte[] convertToBytes(Object object, FileExtension extension) {
118 if (object != null) {
119 if (extension.equals(FileExtension.YAML) || extension.equals(FileExtension.YML)) {
120 return new YamlUtil().objectToYaml(object).getBytes();
122 return JsonUtil.object2Json(object).getBytes();
130 * Convert to input stream input stream.
132 * @param object the object
133 * @param extension the extension
134 * @return the input stream
136 public static InputStream convertToInputStream(Object object, FileExtension extension) {
137 if (object != null) {
141 if (extension.equals(FileExtension.YAML) || extension.equals(FileExtension.YML)) {
142 content = new YamlUtil().objectToYaml(object).getBytes();
144 content = JsonUtil.object2Json(object).getBytes();
147 return new ByteArrayInputStream(content);
154 * Load file to input stream input stream.
156 * @param fileName the file name
157 * @return the input stream
159 public static InputStream loadFileToInputStream(String fileName) {
160 URL urlFile = Thread.currentThread().getContextClassLoader().getResource(fileName);
162 Enumeration<URL> en = Thread.currentThread().getContextClassLoader().getResources(fileName);
163 while (en.hasMoreElements()) {
164 urlFile = en.nextElement();
166 } catch (IOException | NullPointerException exception) {
167 throw new RuntimeException(exception);
170 if (urlFile != null) {
171 return urlFile.openStream();
173 throw new RuntimeException();
175 } catch (IOException | NullPointerException exception) {
176 throw new RuntimeException(exception);
182 * To byte array byte [ ].
184 * @param input the input
185 * @return the byte [ ]
187 public static byte[] toByteArray(InputStream input) {
192 return IOUtils.toByteArray(input);
193 } catch (IOException exception) {
194 throw new RuntimeException(
195 "error while converting input stream to byte array", exception);
200 * Gets file without extention.
202 * @param fileName the file name
203 * @return the file without extention
205 public static String getFileWithoutExtention(String fileName) {
206 if (!fileName.contains(".")) {
209 return fileName.substring(0, fileName.lastIndexOf('.'));
212 public static String getFileExtension(String filename) {
213 return FilenameUtils.getExtension(filename);
216 public static String getNetworkPackageName(String filename) {
217 String[] split = filename.split("\\.");
219 if (split.length > 1) {
226 * Gets file content map from zip.
228 * @param zipData the zip data
229 * @return the file content map from zip
230 * @throws IOException the io exception
232 public static FileContentHandler getFileContentMapFromZip(byte[] zipData) throws IOException {
234 try (ZipInputStream inputZipStream = new ZipInputStream(new ByteArrayInputStream(zipData))) {
236 FileContentHandler mapFileContent = new FileContentHandler();
240 while ((zipEntry = inputZipStream.getNextEntry()) != null) {
241 mapFileContent.addFile(zipEntry.getName(), FileUtils.toByteArray(inputZipStream));
244 return mapFileContent;
246 } catch (RuntimeException exception) {
247 throw new IOException(exception);
253 * The enum File extension.
255 public enum FileExtension {
258 * Json file extension.
262 * Yaml file extension.
266 * Yml file extension.
270 private final String displayName;
272 FileExtension(String displayName) {
273 this.displayName = displayName;
279 * @return the display name
281 public String getDisplayName() {
288 * Write files and folders map to disk in the given path
290 * @param fileContentHandler the file content handler
292 * @return a map containing file names and their absolute paths
293 * @throws IOException the io exception
295 public static Map<String, String> writeFilesFromFileContentHandler(FileContentHandler
301 File dirFile = dir.toFile();
302 Map<String, String> filePaths = new HashMap<>();
303 for (Map.Entry<String, byte[]> fileEntry : fileContentHandler.getFiles().entrySet()) {
304 file = new File(dirFile, fileEntry.getKey());
305 file.getParentFile().mkdirs();
306 filePaths.put(fileEntry.getKey(), file.getAbsolutePath());
307 try (FileOutputStream fop = new FileOutputStream(file.getAbsolutePath());) {
308 fop.write(fileEntry.getValue());
317 * Verify whether the provided extension is valid Yaml/Yml extension or not.
319 * @param fileExtension the file extension
320 * @return the boolean
322 public static boolean isValidYamlExtension(String fileExtension){
323 return fileExtension.equalsIgnoreCase(FileExtension.YML.getDisplayName()) ||
324 fileExtension.equalsIgnoreCase(FileExtension.YAML.getDisplayName());