Java binding - Improve error check before loading Model file (#1206)

* Javav binding - Add check for Model file be Readable.

* add todo for java binding.

---------

Co-authored-by: Feliks Zaslavskiy <feliks.zaslavskiy@optum.com>
Co-authored-by: felix <felix@zaslavskiy.net>

gpt4all-bindings/java/README.md

@@ -12,12 +12,12 @@ You can add Java bindings into your Java project by adding the following depende
 <dependency>
     <groupId>com.hexadevlabs</groupId>
     <artifactId>gpt4all-java-binding</artifactId>
-    <version>1.1.3</version>
+    <version>1.1.5</version>
 </dependency>
 ```
 **Gradle**
 ```
-implementation 'com.hexadevlabs:gpt4all-java-binding:1.1.3'
+implementation 'com.hexadevlabs:gpt4all-java-binding:1.1.5'
 ```
 
 To add the library dependency for another build system see [Maven Central Java bindings](https://central.sonatype.com/artifact/com.hexadevlabs/gpt4all-java-binding/).
@@ -121,4 +121,6 @@ If this is the case you can easily download and install the latest x64 Microsoft
 3. Version **1.1.4**:
    - Java bindings is compatible with gpt4all version 2.4.11
    - Falcon model support included.
+4. Version **1.1.5**:
+   - Add a check for model file readability before loading model.
    

gpt4all-bindings/java/TODO.md

@@ -1,2 +1,6 @@
+## Needed
+1. Integrate with circleci build pipeline like the C# binding.
+
+## These are just ideas
 1. Better Chat completions function.
 2. Chat completion that returns result in OpenAI compatible format.

gpt4all-bindings/java/pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.hexadevlabs</groupId>
     <artifactId>gpt4all-java-binding</artifactId>
-    <version>1.1.4</version>
+    <version>1.1.5</version>
     <packaging>jar</packaging>
 
     <properties>

gpt4all-bindings/java/src/main/java/com/hexadevlabs/gpt4all/LLModel.java

@@ -184,11 +184,16 @@ public  class LLModel implements AutoCloseable {
             throw new IllegalStateException("Model file does not exist: " + modelPathAbs);
         }
 
+        // Check if file is Readable
+        if(!Files.isReadable(modelPath)){
+            throw new IllegalStateException("Model file cannot be read: " + modelPathAbs);
+        }
+
         // Create Model Struct. Will load dynamically the correct backend based on model type
         model = library.llmodel_model_create2(modelPathAbs, "auto", error);
 
         if(model == null) {
-            throw new IllegalStateException("Could not load gpt4all backend :" + error.message);
+            throw new IllegalStateException("Could not load, gpt4all backend returned error: " + error.message);
         }
         library.llmodel_loadModel(model, modelPathAbs);