separated build-in vars from BExpressionContext

brouter-expressions/src/main/java/btools/expressions/BExpressionContextGlobal.java

@@ -0,0 +1,35 @@
+// context for simple expression
+// context means:
+// - the local variables
+// - the local variable names
+// - the lookup-input variables
+
+package btools.expressions;
+
+
+
+public final class BExpressionContextGlobal extends BExpressionContext
+{
+  private static String[] buildInVariables =
+	  {};
+	  
+  protected String[] getBuildInVariableNames()
+  {
+    return buildInVariables;
+  }
+
+  public BExpressionContextGlobal( BExpressionMetaData meta )
+  {
+    super( "global", meta );
+  }
+
+  /**
+   * Create an Expression-Context for way context
+   *
+   * @param hashSize  size of hashmap for result caching
+   */
+  public BExpressionContextGlobal( int hashSize, BExpressionMetaData meta )
+  {
+    super( "global", hashSize, meta );
+  }
+}