Respects lenient flag

Fixes #35

src/main/java/io/gsonfire/gson/FireTypeAdapter.java

@@ -4,6 +4,7 @@
 import com.google.gson.JsonElement;
 import com.google.gson.JsonParser;
 import com.google.gson.TypeAdapter;
+import com.google.gson.internal.bind.JsonTreeReader;
 import com.google.gson.stream.JsonReader;
 import com.google.gson.stream.JsonWriter;
 import io.gsonfire.ClassConfig;
@@ -49,7 +50,7 @@ public T read(JsonReader in) throws IOException {
         JsonElement json = new JsonParser().parse(in);
 
         runPreDeserialize(json);
-        T result = deserialize(json);
+        T result = deserialize(json, in.isLenient());
 
         //Run all the post deserializers
         if (classConfig.isHooksEnabled()) {
@@ -78,9 +79,11 @@ private void runPreDeserialize(JsonElement json){
         }
     }
 
-    private T deserialize(JsonElement json){
-        T result = originalTypeAdapter.fromJsonTree(json);
-        return result;
+    private T deserialize(JsonElement json, boolean lenient) throws IOException{
+        JsonReader jsonReader = new JsonTreeReader(json);
+        jsonReader.setLenient(lenient);
+        T deserialized = originalTypeAdapter.read(jsonReader);
+        return deserialized;
     }
 
 }

src/test/java/io/gsonfire/gson/LenientPersistTest.java

@@ -0,0 +1,58 @@
+package io.gsonfire.gson;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonSyntaxException;
+import io.gsonfire.GsonFireBuilder;
+import io.gsonfire.PreProcessor;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+public class LenientPersistTest {
+
+    @Test
+    public void testLeninentPersist() {
+        Gson gson = new GsonFireBuilder()
+            .registerPreProcessor(SimpleThing.class, new PreProcessor<SimpleThing>() {
+                @Override
+                public void preDeserialize(Class<? extends SimpleThing> clazz, JsonElement src, Gson gson) {
+
+                }
+            })
+            .createGsonBuilder()
+            .setLenient()
+            .create();
+
+        String json = "{\"name\":\"bob\",\"value\":\"NaN\"} /*comment*/";
+        SimpleThing result = gson.fromJson(json, SimpleThing.class);
+
+        assertEquals(result.value, Double.NaN, 0);
+    }
+
+    @Test(expected = JsonSyntaxException.class)
+    public void testNonLeninentPersist() {
+        Gson gson = new GsonFireBuilder()
+            .registerPreProcessor(SimpleThing.class, new PreProcessor<SimpleThing>() {
+                @Override
+                public void preDeserialize(Class<? extends SimpleThing> clazz, JsonElement src, Gson gson) {
+
+                }
+            })
+            .createGsonBuilder()
+            .create();
+
+        String json = "{\"name\":\"bob\",\"value\":\"NaN\"} /*comment*/";
+        SimpleThing result = gson.fromJson(json, SimpleThing.class);
+
+        fail();
+    }
+
+
+    public static class SimpleThing {
+        public String name;
+        public double value;
+    }
+
+}