From d127b993726707005ee1d93f42a7ec652f81ce32 Mon Sep 17 00:00:00 2001
From: 7u83 <7u83@maiil.ru>
Date: Fri, 21 Dec 2018 10:45:29 +0100
Subject: [PATCH] Added a method for default exchange

---
 src/opensesim/world/GodWorld.java  | 19 ++++++++++++++++---
 src/opensesim/world/RealWorld.java |  5 +++++
 src/opensesim/world/World.java     |  2 ++
 3 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/src/opensesim/world/GodWorld.java b/src/opensesim/world/GodWorld.java
index 50fb052..10d8a86 100644
--- a/src/opensesim/world/GodWorld.java
+++ b/src/opensesim/world/GodWorld.java
@@ -211,12 +211,27 @@ public class GodWorld implements GetJson, World {
         return a;
     }
 
-    HashMap<String, Exchange> exchanges = new HashMap<>();
+    // --------------------------------------------------------------------
+    // Exchanges in our world
+    // --------------------------------------------------------------------
+
+    private final HashMap<String, Exchange> exchanges = new HashMap<>();
+    private Exchange default_exchange = null;
 
     public void createExchange(JSONObject cfg) {
         Exchange ex = new Exchange(this.getWorld(), cfg);
         exchanges.put(ex.getSymbol(), ex);
+        if (default_exchange == null) {
+            default_exchange = ex;
+        }
     }
+    
+    public Exchange getDefaultExchange(){
+        return default_exchange;
+    }
+    
+    
+    
 
     @Override
     public Collection<Exchange> getExchangeCollection() {
@@ -366,8 +381,6 @@ public class GodWorld implements GetJson, World {
     // --------------------------------------------------------------------
     // Stuff belonging to accounts
     // --------------------------------------------------------------------
-
-
     // --------------------------------------------------------------------
     // Pseudo random generator stuff
     // --------------------------------------------------------------------   
diff --git a/src/opensesim/world/RealWorld.java b/src/opensesim/world/RealWorld.java
index d996662..4355b7d 100644
--- a/src/opensesim/world/RealWorld.java
+++ b/src/opensesim/world/RealWorld.java
@@ -75,4 +75,9 @@ public class RealWorld implements World {
         return godworld.currentTimeMillis();
     }
 
+    @Override
+    public Exchange getDefaultExchange() {
+        return godworld.getDefaultExchange();
+    }
+
 }
diff --git a/src/opensesim/world/World.java b/src/opensesim/world/World.java
index 920525d..0b056b2 100644
--- a/src/opensesim/world/World.java
+++ b/src/opensesim/world/World.java
@@ -40,6 +40,8 @@ public interface World {
     public AbstractAsset getAssetBySymbol(String symbol);
 
     Collection<Exchange> getExchangeCollection();
+    
+    public Exchange getDefaultExchange();
 
     Collection<Trader> getTradersCollection();