From aa03f17c4381c8042007f5462c5a5ff87dc5d932 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Tue, 26 Apr 2016 21:11:03 +0100
Subject: Use Deque in XmlParser again

---
 dotnet/Mammoth/Couscous/java/util/ArrayDeque.cs    | 35 ++++++++++++++++++++++
 dotnet/Mammoth/Couscous/java/util/Deque.cs         | 10 +++++++
 dotnet/Mammoth/Mammoth.csproj                      |  2 ++
 .../mammoth/internal/xml/parsing/XmlParser.java    | 16 +++++-----
 4 files changed, 55 insertions(+), 8 deletions(-)
 create mode 100644 dotnet/Mammoth/Couscous/java/util/ArrayDeque.cs
 create mode 100644 dotnet/Mammoth/Couscous/java/util/Deque.cs

diff --git a/dotnet/Mammoth/Couscous/java/util/ArrayDeque.cs b/dotnet/Mammoth/Couscous/java/util/ArrayDeque.cs
new file mode 100644
index 0000000..df5447d
--- /dev/null
+++ b/dotnet/Mammoth/Couscous/java/util/ArrayDeque.cs
@@ -0,0 +1,35 @@
+namespace Mammoth.Couscous.java.util {
+    internal class ArrayDeque<T> : Deque<T> {
+        private readonly System.Collections.Generic.IList<T> _list = new System.Collections.Generic.List<T>();
+        
+        public int size() {
+            return _list.Count;
+        }
+        
+        public T getFirst() {
+            if (_list.Count > 0) {
+                return _list[0];
+            } else {
+                throw new NoSuchElementException();
+            }
+        }
+        
+        public T getLast() {
+            if (_list.Count > 0) {
+                return _list[_list.Count - 1];
+            } else {
+                throw new NoSuchElementException();
+            }
+        }
+        
+        public void add(T value) {
+            _list.Add(value);
+        }
+        
+        public T removeLast() {
+            T value = getLast();
+            _list.RemoveAt(_list.Count - 1);
+            return value;
+        }
+    }
+}
diff --git a/dotnet/Mammoth/Couscous/java/util/Deque.cs b/dotnet/Mammoth/Couscous/java/util/Deque.cs
new file mode 100644
index 0000000..c954fce
--- /dev/null
+++ b/dotnet/Mammoth/Couscous/java/util/Deque.cs
@@ -0,0 +1,10 @@
+namespace Mammoth.Couscous.java.util {
+    internal interface Deque<T> {
+        int size();
+        T getFirst();
+        T getLast();
+        
+        void add(T value);
+        T removeLast();
+    }
+}
diff --git a/dotnet/Mammoth/Mammoth.csproj b/dotnet/Mammoth/Mammoth.csproj
index 1c17a82..a49035c 100644
--- a/dotnet/Mammoth/Mammoth.csproj
+++ b/dotnet/Mammoth/Mammoth.csproj
@@ -60,8 +60,10 @@
     <Compile Include="Couscous\java\util\function\Function.cs" />
     <Compile Include="Couscous\java\util\function\Predicate.cs" />
     <Compile Include="Couscous\java\util\function\Supplier.cs" />
+    <Compile Include="Couscous\java\util\ArrayDeque.cs" />
     <Compile Include="Couscous\java\util\ArrayList.cs" />
     <Compile Include="Couscous\java\util\Collection.cs" />
+    <Compile Include="Couscous\java\util\Deque.cs" />
     <Compile Include="Couscous\java\util\HashMap.cs" />
     <Compile Include="Couscous\java\util\HashSet.cs" />
     <Compile Include="Couscous\java\util\Iterator.cs" />
diff --git a/src/main/java/org/zwobble/mammoth/internal/xml/parsing/XmlParser.java b/src/main/java/org/zwobble/mammoth/internal/xml/parsing/XmlParser.java
index e0cc5b4..c76e989 100644
--- a/src/main/java/org/zwobble/mammoth/internal/xml/parsing/XmlParser.java
+++ b/src/main/java/org/zwobble/mammoth/internal/xml/parsing/XmlParser.java
@@ -5,8 +5,8 @@ import org.zwobble.mammoth.internal.xml.XmlElement;
 import org.zwobble.mammoth.internal.xml.XmlTextNode;
 
 import java.io.InputStream;
-import java.util.ArrayList;
-import java.util.List;
+import java.util.ArrayDeque;
+import java.util.Deque;
 import java.util.Map;
 
 import static org.zwobble.mammoth.internal.util.Maps.eagerMapKeys;
@@ -32,14 +32,14 @@ public class XmlParser {
     }
     
     private class NodeGenerator implements SimpleSaxHandler {
-        private final List<XmlElementBuilder> elementStack;
+        private final Deque<XmlElementBuilder> elementStack;
         
         public NodeGenerator() {
-            elementStack = new ArrayList<>();
+            elementStack = new ArrayDeque<>();
         }
         
         public XmlElement getRoot() {
-            return elementStack.get(0).build();
+            return elementStack.getFirst().build();
         }
 
         @Override
@@ -63,14 +63,14 @@ public class XmlParser {
         @Override
         public void endElement() {
             if (elementStack.size() > 1) {
-                XmlElementBuilder element = elementStack.remove(elementStack.size() - 1);
-                elementStack.get(elementStack.size() - 1).addChild(element.build());
+                XmlElementBuilder element = elementStack.removeLast();
+                elementStack.getLast().addChild(element.build());   
             }            
         }
 
         @Override
         public void characters(String string) {
-            elementStack.get(elementStack.size() - 1).addChild(new XmlTextNode(string));
+            elementStack.getLast().addChild(new XmlTextNode(string));
         }
     }
 }
-- 
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