From 5ff8c489054b15d388d9db4f3a3edc1b468f959a Mon Sep 17 00:00:00 2001
From: Ben Culkin <scorpress@gmail.com>
Date: Mon, 6 Apr 2020 16:48:10 -0400
Subject: Add Tape append

Add an ability to append an item to a tape. Currently, the
implementation is kind of inefficent for everything that isn't a
SingleTape
---
 base/src/main/java/bjc/utils/esodata/SingleTape.java |  5 +++++
 base/src/main/java/bjc/utils/esodata/Tape.java       | 18 ++++++++++++++++++
 2 files changed, 23 insertions(+)

(limited to 'base')

diff --git a/base/src/main/java/bjc/utils/esodata/SingleTape.java b/base/src/main/java/bjc/utils/esodata/SingleTape.java
index be9d64b..663fe0a 100644
--- a/base/src/main/java/bjc/utils/esodata/SingleTape.java
+++ b/base/src/main/java/bjc/utils/esodata/SingleTape.java
@@ -180,6 +180,11 @@ public class SingleTape<T> implements Tape<T> {
 		return true;
 	}
 
+	@Override
+	public void append(T itm) {
+		backing.add(itm);
+	}
+	
 	@Override
 	public int hashCode() {
 		final int prime = 31;
diff --git a/base/src/main/java/bjc/utils/esodata/Tape.java b/base/src/main/java/bjc/utils/esodata/Tape.java
index 0835f7e..24319c2 100644
--- a/base/src/main/java/bjc/utils/esodata/Tape.java
+++ b/base/src/main/java/bjc/utils/esodata/Tape.java
@@ -1,5 +1,7 @@
 package bjc.utils.esodata;
 
+import com.sun.rowset.internal.InsertRow;
+
 /**
  * Interface for something that acts like a tape.
  *
@@ -132,4 +134,20 @@ public interface Tape<T> {
 	default boolean atEnd() {
 		return position() == size();
 	}
+	
+	/**
+	 * Append an item to the tape.
+	 * 
+	 * By default, uses a fairly non-performant implementation. Should be overidden in subclasses to be more performant. 
+	 * @param itm The item to append.
+	 */
+	default void append(T itm) {
+		int pos = position();
+		
+		last();
+		
+		insertAfter(itm);
+		
+		seekTo(pos);
+	}
 }
-- 
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