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-rw-r--r--BKUCommonGUI/src/main/java/at/gv/egiz/stal/impl/ByteArrayHashDataInput.java31
1 files changed, 31 insertions, 0 deletions
diff --git a/BKUCommonGUI/src/main/java/at/gv/egiz/stal/impl/ByteArrayHashDataInput.java b/BKUCommonGUI/src/main/java/at/gv/egiz/stal/impl/ByteArrayHashDataInput.java
index b0285345..2b5ee7e7 100644
--- a/BKUCommonGUI/src/main/java/at/gv/egiz/stal/impl/ByteArrayHashDataInput.java
+++ b/BKUCommonGUI/src/main/java/at/gv/egiz/stal/impl/ByteArrayHashDataInput.java
@@ -7,7 +7,11 @@ package at.gv.egiz.stal.impl;
import at.gv.egiz.stal.HashDataInput;
import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
import java.io.InputStream;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
/**
*
@@ -15,6 +19,8 @@ import java.io.InputStream;
*/
public class ByteArrayHashDataInput implements HashDataInput {
+ private static final Log log = LogFactory.getLog(ByteArrayHashDataInput.class);
+
protected byte[] hashData;
protected String id;
protected String mimeType;
@@ -30,6 +36,31 @@ public class ByteArrayHashDataInput implements HashDataInput {
this.encoding = encoding;
}
+ /**
+ * caches the hashdata input's stream
+ * @param hdi to be cached
+ */
+ public ByteArrayHashDataInput(HashDataInput hdi) {
+ if (hdi == null) {
+ throw new NullPointerException("HashDataInput not provided.");
+ }
+ InputStream is = hdi.getHashDataInput();
+ ByteArrayOutputStream baos = new ByteArrayOutputStream();
+ try {
+ byte[] buffer = new byte[1024];
+ for (int i = is.read(buffer); i > -1; i = is.read(buffer)) {
+ baos.write(buffer, 0, i);
+ }
+ this.hashData = baos.toByteArray();
+ } catch (IOException ex) {
+ log.error("Failed to cache provided HashDataInput: " + ex.getMessage(), ex);
+ this.hashData = new byte[0];
+ }
+ this.id = hdi.getReferenceId();
+ this.mimeType = hdi.getMimeType();
+ this.encoding = hdi.getEncoding();
+ }
+
@Override
public String getReferenceId() {
return id;