1 files changed, 69 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/math/linearalgebra/Vector.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/math/linearalgebra/Vector.java
new file mode 100644
index 000000000..7f33d735f
--- /dev/null
+++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/math/linearalgebra/Vector.java
@@ -0,0 +1,69 @@
+package org.spongycastle.pqc.math.linearalgebra;
+
+/**
+ * This abstract class defines vectors. It holds the length of vector.
+ */
+public abstract class Vector
+{
+
+    /**
+     * the length of this vector
+     */
+    protected int length;
+
+    /**
+     * @return the length of this vector
+     */
+    public final int getLength()
+    {
+        return length;
+    }
+
+    /**
+     * @return this vector as byte array
+     */
+    public abstract byte[] getEncoded();
+
+    /**
+     * Return whether this is the zero vector (i.e., all elements are zero).
+     *
+     * @return <tt>true</tt> if this is the zero vector, <tt>false</tt>
+     *         otherwise
+     */
+    public abstract boolean isZero();
+
+    /**
+     * Add another vector to this vector.
+     *
+     * @param addend the other vector
+     * @return <tt>this + addend</tt>
+     */
+    public abstract Vector add(Vector addend);
+
+    /**
+     * Multiply this vector with a permutation.
+     *
+     * @param p the permutation
+     * @return <tt>this*p = p*this</tt>
+     */
+    public abstract Vector multiply(Permutation p);
+
+    /**
+     * Check if the given object is equal to this vector.
+     *
+     * @param other vector
+     * @return the result of the comparison
+     */
+    public abstract boolean equals(Object other);
+
+    /**
+     * @return the hash code of this vector
+     */
+    public abstract int hashCode();
+
+    /**
+     * @return a human readable form of this vector
+     */
+    public abstract String toString();
+
+}