Better error reporting when loading shaderNodeDefinition

jme3-core/src/plugins/java/com/jme3/material/plugins/ShaderNodeLoaderDelegate.java

@@ -232,6 +232,7 @@ public class ShaderNodeLoaderDelegate {
     protected void readShaderNodeDefinition(List<Statement> statements, ShaderNodeDefinitionKey key) throws IOException {
         boolean isLoadDoc = key instanceof ShaderNodeDefinitionKey && ((ShaderNodeDefinitionKey) key).isLoadDocumentation();
         for (Statement statement : statements) {
+            try {
                 String[] split = statement.getLine().split("[ \\{]");
                 String line = statement.getLine();
 
@@ -253,20 +254,31 @@ public class ShaderNodeLoaderDelegate {
                 } else if (line.startsWith("Input")) {
                     varNames = "";
                     for (Statement statement1 : statement.getContents()) {
+                        try {
                             shaderNodeDefinition.getInputs().add(readVariable(statement1));
+                        } catch (RuntimeException e) {
+                            throw new MatParseException(e.getMessage(), statement1, e);
+                        }
                     }
                 } else if (line.startsWith("Output")) {
                     varNames = "";
                     for (Statement statement1 : statement.getContents()) {
-                    if(statement1.getLine().trim().equals("None")){
+                        try {
+                            if (statement1.getLine().trim().equals("None")) {
                                 shaderNodeDefinition.setNoOutput(true);
-                    }else{
+                            } else {
                                 shaderNodeDefinition.getOutputs().add(readVariable(statement1));
                             }
+                        } catch (RuntimeException e) {
+                            throw new MatParseException(e.getMessage(), statement1, e);
+                        }
                     }
                 } else {
                     throw new MatParseException("one of Type, Shader, Documentation, Input, Output", split[0], statement);
                 }
+            } catch (RuntimeException e) {
+                throw new MatParseException(e.getMessage(), statement, e);
+            }
         }
     }
 
@@ -280,6 +292,9 @@ public class ShaderNodeLoaderDelegate {
     protected ShaderNodeVariable readVariable(Statement statement) throws IOException {
         String line = statement.getLine().trim().replaceAll("\\s*\\[", "[");
         String[] splitVar = line.split("\\s");
+        if (splitVar.length != 2) {
+            throw new MatParseException("2 arguments", splitVar.length + "", statement);
+        }
         String varName = splitVar[1];
         String varType = splitVar[0];
         String multiplicity = null;