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[New] Added FileHelper.getTempFile()

This commit is contained in:
Robert von Burg 2021-02-10 17:23:02 +01:00
parent 76f2079d28
commit 8cf29f50c4
2 changed files with 57 additions and 33 deletions
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63
li.strolch.utils/src/main/java/li/strolch/utils/helper/FileHelper.java
View File

@ -15,11 +15,18 @@
*/
package li.strolch.utils.helper;
import static li.strolch.utils.helper.StringHelper.isEmpty;
import static li.strolch.utils.helper.StringHelper.normalizeLength;
import java.io.*;
import java.nio.file.Files;
import java.nio.file.StandardOpenOption;
import java.security.MessageDigest;
import java.text.MessageFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
@ -38,6 +45,44 @@ public class FileHelper {
private static final int MAX_FILE_SIZE = 50 * 1024 * 1024;
private static final Logger logger = LoggerFactory.getLogger(FileHelper.class);
private static final DateTimeFormatter separatedDtf = DateTimeFormatter.ofPattern("yyyy/MM/dd");
private static final DateTimeFormatter nonSeparatedDtf = DateTimeFormatter.ofPattern("yyyy-MM-dd");
/**
* Generates a path to the given temporary path to write a file separated in sub folders by day using current date
*
* @param tempPath
* the directory to which to write the file
* @param prefix
* the prefix of the file name
* @param separateHours
* true to have sub folders for each hour
*
* @return the temporary file
*/
public static File getTempFile(File tempPath, String prefix, String suffix, boolean separateDateSegments,
boolean separateHours) {
LocalDateTime dateTime = LocalDateTime.now();
LocalDate localDate = dateTime.toLocalDate();
String date = separateDateSegments ? localDate.format(separatedDtf) : localDate.format(nonSeparatedDtf);
String currentHour = normalizeLength(String.valueOf(LocalTime.now().getHour()), 2, true, '0');
String pathS = date + (separateHours ? "/" : "_") + currentHour;
File path = new File(tempPath, pathS);
if (!path.exists() && !path.mkdirs())
throw new IllegalStateException("Failed to create path " + path.getAbsolutePath());
prefix = (isEmpty(prefix) ? "" : prefix + "_");
suffix = (isEmpty(suffix) ? "" : suffix);
if (!suffix.startsWith("."))
suffix = "_" + suffix;
String fileName = prefix + System.currentTimeMillis() + suffix;
return new File(path, fileName);
}
/**
* Reads the contents of a file into a byte array.
*
@ -46,7 +91,7 @@ public class FileHelper {
*
* @return the contents of a file as a string
*/
public static final byte[] readFile(File file) {
public static byte[] readFile(File file) {
if (file.length() > MAX_FILE_SIZE)
throw new RuntimeException(
String.format("Only allowed to read files up to %s. File too large: %s", //$NON-NLS-1$
@ -79,7 +124,7 @@ public class FileHelper {
*
* @return the contents of a file as a string
*/
public static final String readFileToString(File file) {
public static String readFileToString(File file) {
try (BufferedReader bufferedReader = new BufferedReader(new FileReader(file));) {
@ -109,7 +154,7 @@ public class FileHelper {
*
* @return the contents of a file as a string
*/
public static final String readStreamToString(InputStream stream) {
public static String readStreamToString(InputStream stream) {
try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(stream));) {
@ -136,7 +181,7 @@ public class FileHelper {
* @param dstFile
* the path to which to write the data
*/
public static final void writeToFile(byte[] bytes, File dstFile) {
public static void writeToFile(byte[] bytes, File dstFile) {
try (BufferedOutputStream out = new BufferedOutputStream(Files.newOutputStream(dstFile.toPath()))) {
out.write(bytes);
@ -155,7 +200,7 @@ public class FileHelper {
* @param dstFile
* the file to write to
*/
public static final void writeStringToFile(String string, File dstFile) {
public static void writeStringToFile(String string, File dstFile) {
try (BufferedWriter bufferedwriter = new BufferedWriter(new FileWriter(dstFile));) {
bufferedwriter.write(string);
@ -176,7 +221,7 @@ public class FileHelper {
*
* @return true if all went well, and false if it did not work. The log will contain the problems encountered
*/
public final static boolean deleteFile(File file, boolean log) {
public static boolean deleteFile(File file, boolean log) {
return FileHelper.deleteFiles(new File[] { file }, log);
}
@ -241,7 +286,7 @@ public class FileHelper {
*
* @return <b>true</b> if and only if the copying succeeded; <b>false</b> otherwise
*/
public final static boolean copy(File[] srcFiles, File dstDirectory, boolean checksum) {
public static boolean copy(File[] srcFiles, File dstDirectory, boolean checksum) {
if (!dstDirectory.isDirectory() || !dstDirectory.canWrite()) {
String msg = "Destination is not a directory or is not writeable: {0}"; //$NON-NLS-1$
@ -282,7 +327,7 @@ public class FileHelper {
*
* @return <b>true</b> if and only if the renaming succeeded; <b>false</b> otherwise
*/
public final static boolean copy(File fromFile, File toFile, boolean checksum) {
public static boolean copy(File fromFile, File toFile, boolean checksum) {
try (BufferedInputStream inBuffer = new BufferedInputStream(Files.newInputStream(fromFile.toPath()));
BufferedOutputStream outBuffer = new BufferedOutputStream(Files.newOutputStream(toFile.toPath()))) {
@ -339,7 +384,7 @@ public class FileHelper {
*
* @return <b>true</b> if and only if the renaming succeeded; <b>false</b> otherwise
*/
public final static boolean move(File fromFile, File toFile) {
public static boolean move(File fromFile, File toFile) {
if (fromFile.renameTo(toFile)) {
return true;

27
li.strolch.utils/src/main/java/li/strolch/utils/helper/XmlHelper.java
View File

@ -15,8 +15,6 @@
*/
package li.strolch.utils.helper;
import static li.strolch.utils.helper.StringHelper.normalizeLength;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
@ -31,8 +29,6 @@ import javax.xml.transform.stream.StreamResult;
import java.io.*;
import java.nio.file.Files;
import java.text.MessageFormat;
import java.time.LocalDate;
import java.time.LocalTime;
import li.strolch.utils.RemoveCRFilterWriter;
import li.strolch.utils.exceptions.XmlException;
@ -333,27 +329,10 @@ public class XmlHelper {
}
}
public static void marshallTempFile(File tempPath, String prefix, Object object) throws Exception {
marshallTempFile(tempPath, prefix, false, object);
}
public static void marshallTempFile(File tempPath, String prefix, boolean separateHours, Object object)
throws Exception {
String currentHour = normalizeLength(String.valueOf(LocalTime.now().getHour()), 2, true, '0');
String pathS;
if (separateHours)
pathS = LocalDate.now() + "/" + currentHour;
else
pathS = LocalDate.now() + "_" + currentHour;
File path = new File(tempPath, pathS);
if (!path.exists() && !path.mkdirs())
throw new IllegalStateException("Failed to create path " + path.getAbsolutePath());
File dataFile = new File(path, prefix + "_" + System.currentTimeMillis() + ".xml");
public static void marshallTempFile(File tempPath, String prefix, boolean separateDateSegments,
boolean separateHours, Object object) throws Exception {
File dataFile = FileHelper.getTempFile(tempPath, prefix, ".xml", separateDateSegments, separateHours);
marshall(dataFile, object);
}