1 files changed, 67 insertions, 0 deletions
diff --git a/STALService/src/main/java/at/gv/egiz/stal/util/HashDataInputProxy.java b/STALService/src/main/java/at/gv/egiz/stal/util/HashDataInputProxy.java
new file mode 100644
index 00000000..dda20968
--- /dev/null
+++ b/STALService/src/main/java/at/gv/egiz/stal/util/HashDataInputProxy.java
@@ -0,0 +1,67 @@
+package at.gv.egiz.stal.util;
+
+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;
+
+import at.gv.egiz.bku.utils.StreamUtil;
+import at.gv.egiz.stal.HashDataInput;
+
+/**
+ * Enables multiple read requests.
+ * 
+ */
+public class HashDataInputProxy implements HashDataInput {
+
+  private static Log log = LogFactory.getLog(HashDataInputProxy.class);
+
+  private HashDataInput delegate;
+  private byte[] hashInput;
+
+  /**
+   * 
+   * @param delegate
+   *          != null
+   */
+  public HashDataInputProxy(HashDataInput delegate) {
+    if (delegate == null) {
+      throw new NullPointerException("Constructor argument must not be null");
+    }
+    this.delegate = delegate;
+  }
+
+  @Override
+  public String getEncoding() {
+    return delegate.getEncoding();
+  }
+
+  @Override
+  public InputStream getHashDataInput() {
+    if (hashInput == null) {
+      ByteArrayOutputStream os = new ByteArrayOutputStream();
+      try {
+        StreamUtil.copyStream(delegate.getHashDataInput(), os);
+        hashInput = os.toByteArray();
+      } catch (IOException e) {
+        log.error("Cannot access hashdatainput stream", e);
+        hashInput = new byte[0];
+      }
+    }
+    return new ByteArrayInputStream(hashInput);
+  }
+
+  @Override
+  public String getMimeType() {
+    return delegate.getMimeType();
+  }
+
+  @Override
+  public String getReferenceId() {
+    return delegate.getReferenceId();
+  }
+
+}