1 files changed, 29 insertions, 0 deletions
diff --git a/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/OutputCompressor.java b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/OutputCompressor.java
new file mode 100644
index 000000000..0e10df9a5
--- /dev/null
+++ b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/OutputCompressor.java
@@ -0,0 +1,29 @@
+package org.spongycastle.operator;
+
+import java.io.OutputStream;
+
+import org.spongycastle.asn1.x509.AlgorithmIdentifier;
+
+/**
+ * General interface for an operator that is able to produce
+ * an OutputStream that will output compressed data.
+ */
+public interface OutputCompressor
+{
+    /**
+     * Return the algorithm identifier describing the compression
+     * algorithm and parameters this compressor uses.
+     *
+     * @return algorithm oid and parameters.
+     */
+    AlgorithmIdentifier getAlgorithmIdentifier();
+
+    /**
+     * Wrap the passed in output stream comOut, returning an output stream
+     * that compresses anything passed in before sending on to comOut.
+     *
+     * @param comOut output stream for compressed output.
+     * @return a compressing OutputStream
+     */
+    OutputStream getOutputStream(OutputStream comOut);
+}