01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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.cocoon.forms.datatype.validationruleimpl;
18:
19: import org.apache.cocoon.forms.datatype.ValidationRule;
20: import org.apache.cocoon.forms.util.DomHelper;
21: import org.w3c.dom.Element;
22: import org.outerj.expression.Expression;
23:
24: /**
25: * Builds {@link ValueCountValidationRule}s.
26: *
27: * @version $Id: ValueCountValidationRuleBuilder.java 449149 2006-09-23 03:58:05Z crossley $
28: */
29: public class ValueCountValidationRuleBuilder extends
30: AbstractValidationRuleBuilder {
31: public ValidationRule build(Element validationRuleElement)
32: throws Exception {
33: ValueCountValidationRule rule = new ValueCountValidationRule();
34:
35: String exactExprString = validationRuleElement
36: .getAttribute("exact");
37: String minExprString = validationRuleElement
38: .getAttribute("min");
39: String maxExprString = validationRuleElement
40: .getAttribute("max");
41:
42: if (exactExprString.length() > 0) {
43: Expression expression = parseExpression(exactExprString,
44: validationRuleElement, "exact");
45: rule.setExactExpr(expression);
46: } else if (minExprString.length() > 0
47: && maxExprString.length() > 0) {
48: Expression expression = parseExpression(minExprString,
49: validationRuleElement, "min");
50: rule.setMinExpr(expression);
51: expression = parseExpression(maxExprString,
52: validationRuleElement, "max");
53: rule.setMaxExpr(expression);
54: } else if (minExprString.length() > 0) {
55: Expression expression = parseExpression(minExprString,
56: validationRuleElement, "min");
57: rule.setMinExpr(expression);
58: } else if (maxExprString.length() > 0) {
59: Expression expression = parseExpression(maxExprString,
60: validationRuleElement, "max");
61: rule.setMaxExpr(expression);
62: } else {
63: throw new Exception(
64: "value-count validation rule requires a min and/or max, or exact attribute at "
65: + DomHelper
66: .getLocation(validationRuleElement));
67: }
68:
69: buildFailMessage(validationRuleElement, rule);
70:
71: return rule;
72: }
73: }
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