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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements. See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership. The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License. You may obtain a copy of the License at
9    *
10   * http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied. See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.ws.commons.schema.constants;
21  
22  public abstract class Enum {
23  
24      public static String NULL = "NULL";
25  
26      protected Enum(String value) {
27          setValue(value);
28      }
29  
30      protected Enum() {
31          this(NULL);
32      }
33  
34      protected abstract String[] getValues();
35  
36      protected String value = NULL;
37  
38      public void setValue(String value) {
39          if (value.equals(Enum.NULL))
40              this.value = Enum.NULL;
41          else {
42              //the value can be a list of space seperated items
43              String possibleValues[] = getValues();
44              String[] valuesToBeTested = value.split("\\s");
45              for (int i = 0; i < valuesToBeTested.length; i++) {
46                  for (int j = 0; j < possibleValues.length; j++) {
47                      if (possibleValues[j].equals(valuesToBeTested[i])) {
48                          break;
49                      }
50                      if (i == possibleValues.length - 1)
51                          throw new EnumValueException("Bad Enumeration value '" + value + "'");
52                  }
53              }
54  
55              //when we reach here we have tested all the values to be correct (applicable)
56               this.value = value;
57  
58  
59          }
60      }
61  
62      public String getValue() {
63          return value;
64      }
65  
66      public String toString() {
67          return value;
68      }
69  
70      public boolean equals(Object what) {
71          return what.getClass().equals(this.getClass()) &&
72                  ((Enum) what).getValue().equals(this.getValue());
73      }
74  
75      public static class EnumValueException extends RuntimeException {
76          /**
77           *
78           */
79          private static final long serialVersionUID = 1L;
80  
81          public EnumValueException(String mesg) {
82              super(mesg);
83          }
84      }
85  
86      protected static final int index(String value, String values[]) {
87          for (int i = 0; i < values.length; i++) {
88              if (value.equals(values[i]))
89                  return i;
90          }
91          return -1;
92      }
93  }
94  
95