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refactor some stream code

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git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1898215 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
PJ Fanning 2022-02-19 12:14:40 +00:00
parent 788dd3f03c
commit 1238d17e2f
1 changed files with 26 additions and 14 deletions
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40
poi/src/test/java/org/apache/poi/poifs/storage/RawDataUtil.java
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@ -17,6 +17,7 @@
package org.apache.poi.poifs.storage;
import java.io.IOException;
import java.io.InputStream;
import java.util.Base64;
import java.util.zip.GZIPInputStream;
@ -35,39 +36,50 @@ public final class RawDataUtil {
private RawDataUtil() {}
public static byte[] decode(String[] hexDataLines) {
UnsynchronizedByteArrayOutputStream baos = new UnsynchronizedByteArrayOutputStream(hexDataLines.length * 32 + 32);
for (String hexDataLine : hexDataLines) {
byte[] lineData = HexRead.readFromString(hexDataLine);
baos.write(lineData, 0, lineData.length);
try (UnsynchronizedByteArrayOutputStream baos =
new UnsynchronizedByteArrayOutputStream(hexDataLines.length * 32 + 32)) {
for (String hexDataLine : hexDataLines) {
byte[] lineData = HexRead.readFromString(hexDataLine);
baos.write(lineData, 0, lineData.length);
}
return baos.toByteArray();
} catch (IOException e) {
throw new IllegalStateException("problem decoding hex data", e);
}
return baos.toByteArray();
}
/**
* Decompress previously gziped/base64ed data
*
* @param data the gziped/base64ed data
* @param data the gzipped/base64ed data
* @return the raw bytes
* @throws IOException if you copy and pasted the data wrong
*/
public static byte[] decompress(String data) throws IOException {
byte[] base64Bytes = Base64.getDecoder().decode(data);
return IOUtils.toByteArray(new GZIPInputStream(new UnsynchronizedByteArrayInputStream(base64Bytes)));
try (
InputStream is = new UnsynchronizedByteArrayInputStream(base64Bytes);
GZIPInputStream gzis = new GZIPInputStream(is);
) {
return IOUtils.toByteArray(gzis);
}
}
/**
* Compress raw data for test runs - usually called while debugging :)
*
* @param data the raw data
* @return the gziped/base64ed data as String
* @return the gzipped/base64ed data as String
* @throws IOException usually not ...
*/
public static String compress(byte[] data) throws IOException {
UnsynchronizedByteArrayOutputStream bos = new UnsynchronizedByteArrayOutputStream();
java.util.zip.GZIPOutputStream gz = new java.util.zip.GZIPOutputStream(bos);
gz.write(data);
gz.finish();
return Base64.getEncoder().encodeToString(bos.toByteArray());
try (
UnsynchronizedByteArrayOutputStream bos = new UnsynchronizedByteArrayOutputStream();
java.util.zip.GZIPOutputStream gz = new java.util.zip.GZIPOutputStream(bos)
) {
gz.write(data);
gz.finish();
return Base64.getEncoder().encodeToString(bos.toByteArray());
}
}
}