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.woody.validation.impl;
18:
19: import org.apache.cocoon.woody.FormContext;
20: import org.apache.cocoon.woody.datatype.ValidationRule;
21: import org.apache.cocoon.woody.formmodel.ExpressionContextImpl;
22: import org.apache.cocoon.woody.formmodel.Widget;
23: import org.apache.cocoon.woody.validation.ValidationError;
24: import org.apache.cocoon.woody.validation.ValidationErrorAware;
25: import org.apache.cocoon.woody.validation.WidgetValidator;
26:
27: /**
28: * An adapter to transform a {@link org.apache.cocoon.woody.datatype.ValidationRule} into a
29: * {@link org.apache.cocoon.woody.validation.WidgetValidator}.
30: *
31: * @author <a href="http://www.apache.org/~sylvain/">Sylvain Wallez</a>
32: * @version CVS $Id: ValidationRuleValidator.java 433543 2006-08-22 06:22:54Z crossley $
33: */
34: public class ValidationRuleValidator implements WidgetValidator {
35:
36: private ValidationRule rule;
37:
38: public ValidationRuleValidator(ValidationRule rule) {
39: this .rule = rule;
40: }
41:
42: public boolean validate(Widget widget, FormContext context) {
43: if (!(widget instanceof ValidationErrorAware)) {
44: // Invalid widget type
45: throw new IllegalArgumentException("Widget '"
46: + widget.getFullyQualifiedId()
47: + "' is not ValidationErrorAware");
48: }
49:
50: Object value = widget.getValue();
51: if (value == null) {
52: // No value. Consider it as correct (required="true" will set an error if present)
53: return true;
54:
55: } else {
56: // Non-null value: perform validation
57: ValidationError error = this .rule.validate(value,
58: new ExpressionContextImpl(widget));
59: if (error != null) {
60: // Validation failed
61: ((ValidationErrorAware) widget)
62: .setValidationError(error);
63: return false;
64: } else {
65: // Validation succeeded
66: return true;
67: }
68: }
69: }
70: }
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