/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cocoon.woody.validation.impl;
import org.apache.cocoon.woody.FormContext;
import org.apache.cocoon.woody.datatype.ValidationRule;
import org.apache.cocoon.woody.formmodel.ExpressionContextImpl;
import org.apache.cocoon.woody.formmodel.Widget;
import org.apache.cocoon.woody.validation.ValidationError;
import org.apache.cocoon.woody.validation.ValidationErrorAware;
import org.apache.cocoon.woody.validation.WidgetValidator;
/**
* An adapter to transform a {@link org.apache.cocoon.woody.datatype.ValidationRule} into a
* {@link org.apache.cocoon.woody.validation.WidgetValidator}.
*
* @author <a href="http://www.apache.org/~sylvain/">Sylvain Wallez</a>
* @version CVS $Id: ValidationRuleValidator.java,v 1.4 2004/03/09 13:54:24 reinhard Exp $
*/
public class ValidationRuleValidator implements WidgetValidator {
private ValidationRule rule;
public ValidationRuleValidator(ValidationRule rule) {
this.rule = rule;
}
public boolean validate(Widget widget, FormContext context)
{
if (! (widget instanceof ValidationErrorAware)) {
// Invalid widget type
throw new IllegalArgumentException("Widget '" + widget.getFullyQualifiedId() + "' is not ValidationErrorAware");
}
Object value = widget.getValue();
if (value == null) {
// No value. Consider it as correct (required="true" will set an error if present)
return true;
} else {
// Non-null value: perform validation
ValidationError error = this.rule.validate(value, new ExpressionContextImpl(widget));
if (error != null) {
// Validation failed
((ValidationErrorAware)widget).setValidationError(error);
return false;
} else {
// Validation succeeded
return true;
}
}
}
}