public static boolean castable()

in src/org/apache/pig/impl/logicalLayer/schema/Schema.java [216:280]
50 lines of code
32 McCabe index (conditional complexity)

        public static boolean castable(
                Schema.FieldSchema castFs,
                Schema.FieldSchema inputFs) {
            if(castFs == null && inputFs == null) {
                return false;
            }
            
            if (castFs == null) {
                return false ;
            }
    
            if (inputFs == null) {
                return false ;
            }
            byte inputType = inputFs.type;
            byte castType = castFs.type;
    
            if (DataType.isSchemaType(castFs.type)) {
                if(inputType == DataType.BYTEARRAY) {
                    // good
                } else if (inputType == castType) {
                    // Don't do the comparison if both embedded schemas are
                    // null.  That will cause Schema.equals to return false,
                    // even though we want to view that as true.
                    if (!(castFs.schema == null && inputFs.schema == null)) { 
                        // compare recursively using schema
                        if (!Schema.castable(castFs.schema, inputFs.schema)) {
                            return false ;
                        }
                    }
                } else {
                    return false;
                }
            } else {
                if (inputType == castType) {
                    // good
                }
                else if (inputType == DataType.BOOLEAN && (castType == DataType.CHARARRAY
                        || castType == DataType.BYTEARRAY || DataType.isNumberType(castType))) {
                    // good
                }
                else if (DataType.isNumberType(inputType) && (castType == DataType.CHARARRAY
                        || castType == DataType.BYTEARRAY || DataType.isNumberType(castType)
                        || castType == DataType.BOOLEAN || castType == DataType.DATETIME)) {
                    // good
                }
                else if (inputType == DataType.DATETIME && (castType == DataType.CHARARRAY
                        || castType == DataType.BYTEARRAY || DataType.isNumberType(castType))) {
                    // good
                }
                else if (inputType == DataType.CHARARRAY && (castType == DataType.BYTEARRAY
                        || DataType.isNumberType(castType) || castType == DataType.BOOLEAN
                        || castType == DataType.DATETIME)) {
                    // good
                } 
                else if (inputType == DataType.BYTEARRAY) {
                    // good
                }
                else {
                    return false;
                }
            }
    
            return true ;
        }