add linked list to association list converter

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/src/datastructures/linkedlists/Association.java b/src/datastructures/linkedlists/Association.java
new file mode 100644
index 0000000..3ccf360
--- /dev/null
+++ b/src/datastructures/linkedlists/Association.java
@@ -0,0 +1,76 @@
+/**
+ * Copyright © 2014  Mattias Andrée (maandree@member.fsf.org)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package datastructures.linkedlists;
+
+
+/**
+ * Value type that can be stored in linked lists
+ * to turn them in to association lists.
+ * 
+ * @param  <K>  The type of the key of the node
+ * @param  <V>  The type of the value associated with the key
+ */
+public class Association<K, V>
+{
+    /**
+     * Constructor
+     * 
+     * @param  key    The key of the node
+     * @param  value  The value associated with the key
+     */
+    public Association(K key, V value)
+    {
+	this.key = key;
+	this.value = value;
+    }
+    
+    
+    
+    /**
+     * The key of the node
+     */
+    public K key;
+    
+    /**
+     * The value associated with the key
+     */
+    public V value;
+    
+    
+    
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public boolean equals(Object other)
+    {
+	if ((this.key == null) || (other == null))
+	    return (this.key == null) && (other == null);
+	return this.key.equals(other);
+    }
+    
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public int hashCode()
+    {
+	return this.key.hashCode();
+    }
+    
+}
+