BUG 64015 -- swap out java.util.BitSet for zaxxer's SparseBitSet

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1872445 13f79535-47bb-0310-9956-ffa450edef68

2 files changed, 7 insertions, 7 deletions

diff --git a/src/java/org/apache/poi/poifs/crypt/ChunkedCipherOutputStream.java b/src/java/org/apache/poi/poifs/crypt/ChunkedCipherOutputStream.java
index b98e229d8e..e00b1c2bac 100644
--- a/src/java/org/apache/poi/poifs/crypt/ChunkedCipherOutputStream.java
+++ b/src/java/org/apache/poi/poifs/crypt/ChunkedCipherOutputStream.java
@@ -25,13 +25,13 @@ import java.io.FilterOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.security.GeneralSecurityException;
-import java.util.BitSet;
 
 import javax.crypto.BadPaddingException;
 import javax.crypto.Cipher;
 import javax.crypto.IllegalBlockSizeException;
 import javax.crypto.ShortBufferException;
 
+import com.zaxxer.sparsebits.SparseBitSet;
 import org.apache.poi.EncryptedDocumentException;
 import org.apache.poi.poifs.filesystem.DirectoryNode;
 import org.apache.poi.poifs.filesystem.POIFSWriterEvent;
@@ -56,7 +56,7 @@ public abstract class ChunkedCipherOutputStream extends FilterOutputStream {
     private final int chunkBits;
 
     private final byte[] chunk;
-    private final BitSet plainByteFlags;
+    private final SparseBitSet plainByteFlags;
     private final File fileOut;
     private final DirectoryNode dir;
 
@@ -74,7 +74,7 @@ public abstract class ChunkedCipherOutputStream extends FilterOutputStream {
         this.chunkSize = chunkSize;
         int cs = chunkSize == STREAMING ? 4096 : chunkSize;
         this.chunk = IOUtils.safelyAllocate(cs, MAX_RECORD_LENGTH);
-        this.plainByteFlags = new BitSet(cs);
+        this.plainByteFlags = new SparseBitSet(cs);
         this.chunkBits = Integer.bitCount(cs-1);
         this.fileOut = TempFile.createTempFile("encrypted_package", "crypt");
         this.fileOut.deleteOnExit();
@@ -88,7 +88,7 @@ public abstract class ChunkedCipherOutputStream extends FilterOutputStream {
         this.chunkSize = chunkSize;
         int cs = chunkSize == STREAMING ? 4096 : chunkSize;
         this.chunk = IOUtils.safelyAllocate(cs, MAX_RECORD_LENGTH);
-        this.plainByteFlags = new BitSet(cs);
+        this.plainByteFlags = new SparseBitSet(cs);
         this.chunkBits = Integer.bitCount(cs-1);
         this.fileOut = null;
         this.dir = null;
@@ -283,7 +283,7 @@ public abstract class ChunkedCipherOutputStream extends FilterOutputStream {
         return chunk;
     }
 
-    protected BitSet getPlainByteFlags() {
+    protected SparseBitSet getPlainByteFlags() {
         return plainByteFlags;
     }
 
diff --git a/src/java/org/apache/poi/poifs/crypt/xor/XOREncryptor.java b/src/java/org/apache/poi/poifs/crypt/xor/XOREncryptor.java
index 3b180b20d4..0c1cbf4932 100644
--- a/src/java/org/apache/poi/poifs/crypt/xor/XOREncryptor.java
+++ b/src/java/org/apache/poi/poifs/crypt/xor/XOREncryptor.java
@@ -21,11 +21,11 @@ import java.io.File;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.security.GeneralSecurityException;
-import java.util.BitSet;
 
 import javax.crypto.Cipher;
 import javax.crypto.spec.SecretKeySpec;
 
+import com.zaxxer.sparsebits.SparseBitSet;
 import org.apache.poi.EncryptedDocumentException;
 import org.apache.poi.poifs.crypt.ChunkedCipherOutputStream;
 import org.apache.poi.poifs.crypt.CryptoFunctions;
@@ -139,7 +139,7 @@ public class XOREncryptor extends Encryptor {
 
             final int start = Math.max(posInChunk-(recordEnd-recordStart), 0);
 
-            final BitSet plainBytes = getPlainByteFlags();
+            final SparseBitSet plainBytes = getPlainByteFlags();
             final byte[] xorArray = getEncryptionInfo().getEncryptor().getSecretKey().getEncoded();
             final byte[] chunk = getChunk();
             final byte[] plain = (plainBytes.isEmpty()) ? null : chunk.clone();