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Add TRUNCATE_EXISTING and WRITE open options (fix overwrite behavior)

This commit is contained in:
dotasek 2024-08-20 11:14:54 -04:00
parent 4daf7feb93
commit cfed736cd6
2 changed files with 35 additions and 5 deletions
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10
org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/TextFile.java
View File

@ -69,7 +69,7 @@ public class TextFile {
public static void writeAllLines(String path, List<String> lines) throws IOException
{
final File file = ManagedFileAccess.csfile(path);
Files.write(file.toPath(), lines, StandardCharsets.UTF_8, StandardOpenOption.CREATE, StandardOpenOption.SYNC);
Files.write(file.toPath(), lines, StandardCharsets.UTF_8, StandardOpenOption.CREATE, StandardOpenOption.SYNC, StandardOpenOption.TRUNCATE_EXISTING, StandardOpenOption.WRITE);
}
public static void stringToStream(final String content, final OutputStream stream) throws IOException {
@ -87,13 +87,13 @@ public class TextFile {
public static void stringToFile(final String content, final File file) throws IOException {
try (final OutputStream output = Files.newOutputStream(file.toPath(), StandardOpenOption.CREATE, StandardOpenOption.SYNC)) {
try (final OutputStream output = Files.newOutputStream(file.toPath(), StandardOpenOption.CREATE, StandardOpenOption.SYNC, StandardOpenOption.TRUNCATE_EXISTING, StandardOpenOption.WRITE)) {
output.write(content.getBytes(StandardCharsets.UTF_8));
}
}
public static void stringToFileWithBOM(final String content, final File file) throws IOException {
try (final OutputStream output = Files.newOutputStream(file.toPath(), StandardOpenOption.CREATE, StandardOpenOption.SYNC)) {
try (final OutputStream output = Files.newOutputStream(file.toPath(), StandardOpenOption.CREATE, StandardOpenOption.SYNC, StandardOpenOption.TRUNCATE_EXISTING, StandardOpenOption.WRITE)) {
output.write(new byte[]{(byte)239, (byte)187, (byte)191});
output.write(content.getBytes(StandardCharsets.UTF_8));
}
@ -153,8 +153,8 @@ public class TextFile {
public static void appendBytesToFile(final byte[] bytes, final String path) throws IOException {
byte[] linebreak = new byte[] {13, 10};
Files.write(Paths.get(path), linebreak, StandardOpenOption.APPEND, StandardOpenOption.SYNC);
Files.write(Paths.get(path), bytes, StandardOpenOption.APPEND, StandardOpenOption.SYNC);
Files.write(Paths.get(path), linebreak, StandardOpenOption.APPEND, StandardOpenOption.SYNC, StandardOpenOption.WRITE);
Files.write(Paths.get(path), bytes, StandardOpenOption.APPEND, StandardOpenOption.SYNC, StandardOpenOption.WRITE);
}
public static byte[] fileToBytes(final String srcFile) throws FileNotFoundException, IOException {

30
org.hl7.fhir.utilities/src/test/java/org/hl7/fhir/utilities/TextFileTest.java
View File

@ -3,6 +3,7 @@ package org.hl7.fhir.utilities;
import org.hl7.fhir.utilities.filesystem.ManagedFileAccess;
import org.junit.jupiter.api.*;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
@ -24,6 +25,8 @@ import org.junit.jupiter.api.*;
private static final List<String> SAMPLE_CONTENT_LINES = List.of("Line 1", "Line 2", "Line 3");
private static final String BOM = "\uFEFF";
private static final byte[] BOM_BYTES = new byte[]{(byte)239, (byte)187, (byte)191};
private static File readFile;
private final static List<File> createdFiles = new ArrayList<>(4);
@ -104,6 +107,33 @@ import org.junit.jupiter.api.*;
assertArrayEquals(SAMPLE_CONTENT.getBytes(StandardCharsets.UTF_8), read);
}
@Test
void testBytesToFile() throws IOException {
final var writeFile = createTempFile();
TextFile.bytesToFile(BOM_BYTES, writeFile);
assertArrayEquals(BOM_BYTES, Files.readAllBytes(writeFile.toPath()));
}
@Test
void testAppendBytesToFile() throws IOException {
final var writeFile = createTempFile();
TextFile.bytesToFile(BOM_BYTES, writeFile);
assertArrayEquals(BOM_BYTES, Files.readAllBytes(writeFile.toPath()));
TextFile.appendBytesToFile(SAMPLE_CONTENT.getBytes(StandardCharsets.UTF_8), writeFile.getAbsolutePath());
ByteArrayOutputStream outputStream = new ByteArrayOutputStream( );
outputStream.write( BOM_BYTES );
outputStream.write(new byte[] {13, 10}); //newline
outputStream.write( SAMPLE_CONTENT.getBytes(StandardCharsets.UTF_8) );
byte[] expected = outputStream.toByteArray();
byte[] actual = Files.readAllBytes(writeFile.toPath());
assertArrayEquals(expected, actual);
}
@Test
void testStringToFile() throws IOException {
final var writeFile = createTempFile();