Throw exception instead of assert(false)

cdm/core/src/main/java/ucar/nc2/EnumTypedef.java

@@ -135,7 +135,7 @@ protected void writeCDL(Formatter out, Indent indent, boolean strict) {
         basetype = "";
         break;
       default:
-        assert false : "Internal error";
+        throw new IllegalStateException("Unexpected basetype = " + basetype);
     }
     out.format("%s%senum %s { ", indent, basetype, name);
     int count = 0;

cdm/core/src/main/java/ucar/nc2/write/CDLWriter.java

@@ -265,7 +265,7 @@ private void writeCDL(EnumTypedef e, Indent indent) {
         basetype = "";
         break;
       default:
-        assert false : "Internal error";
+        throw new IllegalStateException("Unexpected basetype = " + e.getBaseType());
     }
     out.format("%s%senum %s { ", indent, basetype, name);
     int count = 0;

dap4/src/main/java/dap4/core/ce/CECompiler.java

@@ -69,7 +69,7 @@ protected void compileAST(CEAST ast) throws DapException {
         dimredef(ast);
         break;
       default:
-        assert false : "uknown CEAST node type";
+        throw new IllegalStateException("unknown CEAST node type = " + ast.sort);
     }
   }
 
@@ -118,7 +118,7 @@ protected DapVariable compilesegment(CEAST ast) throws DapException {
               node = seq.findByName(ast.name);
               break;
             default:
-              assert false : "Container cannot be atomic variable";
+              throw new DapException("Container cannot be atomic variable, sort = " + parent.getSort());
           }
         default:
           throw new DapException("relative names must be WRT to structure|dataset object: " + parent.getFQN());

dap4/src/main/java/dap4/core/ce/parser/CEParserImpl.java

@@ -179,7 +179,7 @@ Slice subslice(int state, String sfirst, String send, String sstride) throws Par
         case 5: // [f:s:]
           break;
         default:
-          assert false : "Illegal slice case";
+          throw new ParseException("Illegal slice case, state = " + state);
       }
     } catch (DapException de) {
       throw new ParseException(de);

dap4/src/main/java/dap4/core/dmr/DMRPrinter.java

@@ -323,12 +323,11 @@ public boolean printNode(DapNode node) throws IOException {
           printer.outdent();
           printer.marginPrint("</" + type.getTypeSort().name() + ">");
         } else
-          assert false : "Illegal variable base type";
+          throw new IllegalStateException("Illegal variable base type");
         break;
 
       default:
-        assert (false) : "Unexpected sort: " + sort.name();
-        break;
+        throw new IllegalStateException("Unexpected sort: " + sort.name());
     }
     return true;
   }

dap4/src/main/java/dap4/core/dmr/DapGroup.java

@@ -138,7 +138,7 @@ void updateGroups(List<DapGroup> groups) {
     assert (groups.size() == this.groups.size()) : "Update groups: not same size";
     for (DapGroup g : groups) {
       if (!this.groups.contains(g))
-        assert (false) : "Update groups: attempt to add new group";
+        throw new IllegalStateException("Update groups: attempt to add new group");
     }
   }
 

dap4/src/main/java/dap4/core/dmr/DapNode.java

@@ -105,7 +105,7 @@ else if (this instanceof DapEnumConst)
     else if (this instanceof DapMap)
       this.sort = DapSort.MAP;
     else
-      assert (false) : "Internal error";
+      throw new IllegalStateException("Unexpected type = " + this.getClass());
   }
 
   public DapNode(String shortname) {

dap4/src/main/java/dap4/core/dmr/parser/DOM4Parser.java

@@ -386,7 +386,7 @@ protected void addField(DapType t, DapVariable field) throws DapException {
         field.setParent(t);
         break;
       default:
-        assert false : "Container must be struct or seq";
+        throw new IllegalStateException("Container must be struct or seq, sort = " + t.getTypeSort());
     }
   }
 

dap4/src/main/java/dap4/core/util/DapUtil.java

@@ -360,7 +360,7 @@ static public List<DapVariable> getStructurePath(DapVariable var) {
           structpath.add((DapVariable) node);
           break;
         default:
-          assert false : "Internal error";
+          throw new IllegalStateException("Internal error, sort = " + node.getSort());
       }
     }
     return structpath;

dap4/src/main/java/dap4/dap4lib/D4DataCompiler.java

@@ -385,7 +385,7 @@ public Array createArray(DapVariable var, Object storage) {
       case STRUCTURE:
       case SEQUENCE:
       default:
-        assert false;
+        throw new IllegalStateException("Unexpected scheme = " + schemeFor(var));
     }
     return array;
   }

dap4/src/main/java/dap4/dap4lib/cdm/nc2/DMRToCDM.java

@@ -177,8 +177,9 @@ protected void createVar(DapVariable dapvar, NetcdfFile ncfile, Group cdmgroup,
         cdmvar.addAttribute(warning);
       }
 
-    } else
-      assert (false) : "Unknown variable sort: " + dapvar.getSort();
+    } else {
+      throw new IllegalStateException("Unknown variable sort: " + dapvar.getSort());
+    }
     int rank = dapvar.getRank();
     List<Dimension> cdmdims = new ArrayList<Dimension>(rank + 1); // +1 for vlen
     for (int i = 0; i < rank; i++) {