1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.commons.scxml2.semantics; 18 19 /** 20 * Errors reported by the default SCXMLSemantics implementation. 21 * 22 */ 23 public class ErrorConstants { 24 25 /** 26 * Missing initial state for a composite state or for the scxml root. 27 * 28 * @see org.apache.commons.scxml2.model.SCXML#getInitialTransition() 29 * @see org.apache.commons.scxml2.model.State#getInitial() 30 */ 31 public static final String NO_INITIAL = "NO_INITIAL"; 32 33 /** 34 * An initial state for a composite state whose Transition does not. 35 * Map to a descendant of the composite state. 36 * 37 */ 38 public static final String ILLEGAL_INITIAL = "ILLEGAL_INITIAL"; 39 40 /** 41 * Unknown action - unsupported executable content. List of supported. 42 * actions: assign, cancel, elseif, else, if, log, send, var 43 */ 44 public static final String UNKNOWN_ACTION = "UNKNOWN_ACTION"; 45 46 /** 47 * Illegal state machine configuration. 48 * Either a parallel exists which does not have all its AND sub-states 49 * active or there are multiple enabled OR states on the same level. 50 */ 51 public static final String ILLEGAL_CONFIG = "ILLEGAL_CONFIG"; 52 53 /** 54 * A variable referred to by assign name attribute is undefined. 55 */ 56 public static final String UNDEFINED_VARIABLE = "UNDEFINED_VARIABLE"; 57 58 /** 59 * An expression language error. 60 */ 61 public static final String EXPRESSION_ERROR = "EXPRESSION_ERROR"; 62 63 /** 64 * An execution error. 65 */ 66 public static final String EXECUTION_ERROR = "EXECUTION_ERROR"; 67 68 //---------------------------------------------- STATIC CONSTANTS ONLY 69 70 /** 71 * Discourage instantiation. 72 */ 73 private ErrorConstants() { 74 super(); // humor checkstyle 75 } 76 77 }