1 files changed, 49 insertions, 0 deletions
diff --git a/pkix/src/main/java/org/spongycastle/cms/CMSAbsentContent.java b/pkix/src/main/java/org/spongycastle/cms/CMSAbsentContent.java
new file mode 100644
index 00000000..59409ea1
--- /dev/null
+++ b/pkix/src/main/java/org/spongycastle/cms/CMSAbsentContent.java
@@ -0,0 +1,49 @@
+package org.spongycastle.cms;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import org.spongycastle.asn1.ASN1ObjectIdentifier;
+import org.spongycastle.asn1.cms.CMSObjectIdentifiers;
+
+/**
+ * a class representing null or absent content.
+ */
+public class CMSAbsentContent
+    implements CMSTypedData, CMSReadable
+{
+    private final ASN1ObjectIdentifier type;
+
+    public CMSAbsentContent()
+    {
+        this(new ASN1ObjectIdentifier(CMSObjectIdentifiers.data.getId()));
+    }
+
+    public CMSAbsentContent(
+        ASN1ObjectIdentifier type)
+    {
+        this.type = type;
+    }
+
+    public InputStream getInputStream()
+    {
+        return null;
+    }
+
+    public void write(OutputStream zOut)
+        throws IOException, CMSException
+    {
+        // do nothing
+    }
+
+    public Object getContent()
+    {
+        return null;
+    }
+
+    public ASN1ObjectIdentifier getContentType()
+    {
+        return type;
+    }
+}