1 files changed, 59 insertions, 0 deletions
diff --git a/bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/DataObjectHashDataInput.java b/bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/DataObjectHashDataInput.java
new file mode 100644
index 00000000..57358ba0
--- /dev/null
+++ b/bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/DataObjectHashDataInput.java
@@ -0,0 +1,59 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package at.gv.egiz.bku.slcommands.impl;
+
+import at.gv.egiz.bku.binding.HttpUtil;
+import at.gv.egiz.bku.slcommands.impl.xsect.DataObject;
+import at.gv.egiz.stal.HashDataInput;
+import java.io.InputStream;
+
+/**
+ * DataObject-backed HashDataInput
+ * If <a href="XMLSignContext.html#Supported Properties">reference caching</a> is enabled,
+ * the hashdata input stream can be obtained repeatedly.
+ * @author clemens
+ */
+public class DataObjectHashDataInput implements HashDataInput {
+
+  protected DataObject dataObject;
+
+    public DataObjectHashDataInput(DataObject dataObject) {
+      if (dataObject.getReference() == null) 
+        throw new NullPointerException("DataObject reference must not be null");
+      this.dataObject = dataObject;
+    }
+    
+    @Override
+    public String getReferenceId() {
+      return dataObject.getReference().getId();
+    }
+
+    @Override
+    public String getMimeType() {
+      String contentType = dataObject.getMimeType();
+      return contentType.split(";")[0].trim();
+    }
+
+    /**
+     * may be called repeatedly
+     * @return the pre-digested input stream if reference caching is enabled, null otherwise
+     */
+    @Override
+    public InputStream getHashDataInput() {
+        return dataObject.getReference().getDigestInputStream();
+    }
+
+    @Override
+    public String getEncoding() {
+      return HttpUtil.getCharset(dataObject.getMimeType(), false);
+    }
+
+    @Override
+    public String getFilename() {
+      //TODO obtain filename from dataObject, if not set return null or get filename (extension!) from mimetype
+      return dataObject.getFilename();
+    }
+
+}