Configuration methods .getX (int/double/etc) now try to cast existing values where possible. This fixes BUKKIT-290

By: Nathan Adams <dinnerbone@dinnerbone.com>

paper-api/src/main/java/org/bukkit/configuration/MemorySection.java

@@ -12,6 +12,7 @@ import java.util.regex.Pattern;
 import org.bukkit.OfflinePlayer;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.util.Vector;
+import static org.bukkit.util.NumberConversions.*;
 
 /**
  * A type of {@link ConfigurationSection} that is stored in memory.
@@ -315,7 +316,7 @@ public class MemorySection implements ConfigurationSection {
         }
 
         Object def = getDefault(path);
-        return getInt(path, (def instanceof Integer) ? (Integer)def : 0);
+        return getInt(path, (def instanceof Number) ? toInt(def) : 0);
     }
 
     public int getInt(String path, int def) {
@@ -324,7 +325,7 @@ public class MemorySection implements ConfigurationSection {
         }
 
         Object val = get(path, def);
-        return (val instanceof Integer) ? (Integer)val : def;
+        return (val instanceof Number) ? toInt(val) : def;
     }
 
     public boolean isInt(String path) {
@@ -369,7 +370,7 @@ public class MemorySection implements ConfigurationSection {
         }
 
         Object def = getDefault(path);
-        return getDouble(path, (def instanceof Double) ? (Double)def : 0);
+        return getDouble(path, (def instanceof Number) ? toDouble(def) : 0);
     }
 
     public double getDouble(String path, double def) {
@@ -378,7 +379,7 @@ public class MemorySection implements ConfigurationSection {
         }
 
         Object val = get(path, def);
-        return (val instanceof Double) ? (Double)val : def;
+        return (val instanceof Number) ? toDouble(val) : def;
     }
 
     public boolean isDouble(String path) {
@@ -396,7 +397,7 @@ public class MemorySection implements ConfigurationSection {
         }
 
         Object def = getDefault(path);
-        return getLong(path, (def instanceof Long) ? (Long)def : 0);
+        return getLong(path, (def instanceof Number) ? toLong(def) : 0);
     }
 
     public long getLong(String path, long def) {
@@ -405,7 +406,7 @@ public class MemorySection implements ConfigurationSection {
         }
 
         Object val = get(path, def);
-        return (val instanceof Long) ? (Long)val : def;
+        return (val instanceof Number) ? toLong(val) : def;
     }
 
     public boolean isLong(String path) {

paper-api/src/main/java/org/bukkit/util/NumberConversions.java

@@ -0,0 +1,92 @@
+package org.bukkit.util;
+
+/**
+ * Utils for casting number types to other number types
+ */
+public final class NumberConversions {
+    private NumberConversions() {}
+
+    public static int toInt(Object object) {
+        if (object instanceof Number) {
+            return ((Number)object).intValue();
+        } else {
+            int result = 0;
+
+            try {
+                result = Integer.valueOf((String)object);
+            } catch (Throwable ex) {}
+
+            return result;
+        }
+    }
+
+    public static float toFloat(Object object) {
+        if (object instanceof Number) {
+            return ((Number)object).floatValue();
+        } else {
+            float result = 0;
+
+            try {
+                result = Float.valueOf((String)object);
+            } catch (Throwable ex) {}
+
+            return result;
+        }
+    }
+
+    public static double toDouble(Object object) {
+        if (object instanceof Number) {
+            return ((Number)object).doubleValue();
+        } else {
+            double result = 0;
+
+            try {
+                result = Double.valueOf((String)object);
+            } catch (Throwable ex) {}
+
+            return result;
+        }
+    }
+
+    public static long toLong(Object object) {
+        if (object instanceof Number) {
+            return ((Number)object).longValue();
+        } else {
+            long result = 0;
+
+            try {
+                result = Long.valueOf((String)object);
+            } catch (Throwable ex) {}
+
+            return result;
+        }
+    }
+
+    public static short toShort(Object object) {
+        if (object instanceof Number) {
+            return ((Number)object).shortValue();
+        } else {
+            short result = 0;
+
+            try {
+                result = Short.valueOf((String)object);
+            } catch (Throwable ex) {}
+
+            return result;
+        }
+    }
+
+    public static byte toByte(Object object) {
+        if (object instanceof Number) {
+            return ((Number)object).byteValue();
+        } else {
+            byte result = 0;
+
+            try {
+                result = Byte.valueOf((String)object);
+            } catch (Throwable ex) {}
+
+            return result;
+        }
+    }
+}

paper-api/src/test/java/org/bukkit/configuration/ConfigurationSectionTest.java

@@ -315,9 +315,21 @@ public abstract class ConfigurationSectionTest {
         ConfigurationSection section = getConfigurationSection();
         String key = "exists";
         double value = Double.MAX_VALUE;
-        
+
         section.set(key, value);
-        
+
+        assertEquals(value, section.getDouble(key), 1);
+        assertNull(section.getString("doesntExist"));
+    }
+
+    @Test
+    public void testGetDoubleFromInt() {
+        ConfigurationSection section = getConfigurationSection();
+        String key = "exists";
+        double value = 123;
+
+        section.set(key, (int)value);
+
         assertEquals(value, section.getDouble(key), 1);
         assertNull(section.getString("doesntExist"));
     }