[ BAEL-2978 ]: Determine file creation date in java (#7099)

* [ BAEL-2978 ]: Determine file creation date in java
This commit is contained in:
Lukasz Rys 2019-06-12 05:21:06 +02:00 committed by Josh Cummings
parent d5f8b4e852
commit 847ad4d0dd
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## Relevant articles:
- [Determine File Creating Date in Java](https://www.baeldung.com/file-creation-date-java)

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package com.baeldung.creationdate;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.BasicFileAttributes;
import java.nio.file.attribute.FileTime;
import java.time.Instant;
import java.util.Optional;
public class CreationDateResolver {
public Instant resolveCreationTimeWithBasicAttributes(Path path) {
try {
final BasicFileAttributes attr = Files.readAttributes(path, BasicFileAttributes.class);
final FileTime fileTime = attr.creationTime();
return fileTime.toInstant();
} catch (IOException ex) {
throw new RuntimeException("An issue occured went wrong when resolving creation time", ex);
}
}
public Optional<Instant> resolveCreationTimeWithAttribute(Path path) {
try {
final FileTime creationTime = (FileTime) Files.getAttribute(path, "creationTime");
return Optional
.ofNullable(creationTime)
.map((FileTime::toInstant));
} catch (IOException ex) {
throw new RuntimeException("An issue occured went wrong when resolving creation time", ex);
}
}
}

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package com.baeldung.creationdate;
import org.junit.Test;
import java.io.File;
import java.nio.file.Path;
import java.time.Instant;
import java.util.Optional;
import static org.junit.Assert.assertTrue;
public class CreationDateResolverUnitTest {
private final CreationDateResolver creationDateResolver = new CreationDateResolver();
@Test
public void givenFile_whenGettingCreationDateTimeFromBasicAttributes_thenReturnDate() throws Exception {
final File file = File.createTempFile("createdFile", ".txt");
final Path path = file.toPath();
final Instant response = creationDateResolver.resolveCreationTimeWithBasicAttributes(path);
assertTrue(Instant
.now()
.isAfter(response));
}
@Test
public void givenFile_whenGettingCreationDateTimeFromAttribute_thenReturnDate() throws Exception {
final File file = File.createTempFile("createdFile", ".txt");
final Path path = file.toPath();
final Optional<Instant> response = creationDateResolver.resolveCreationTimeWithAttribute(path);
response.ifPresent((value) -> {
assertTrue(Instant
.now()
.isAfter(value));
});
}
}