| // Copyright 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.tapestry.parse; |
| |
| import org.apache.tapestry.Tapestry; |
| import org.apache.tapestry.util.RegexpMatcher; |
| import org.apache.tapestry.util.xml.InvalidStringException; |
| import org.xml.sax.Attributes; |
| |
| /** |
| * Validates that an attribute matches a specified pattern. |
| * |
| * @author Howard Lewis Ship |
| * @version $Id$ |
| * @since 3.0 |
| * |
| **/ |
| |
| public class ValidateRule extends AbstractSpecificationRule |
| { |
| private RegexpMatcher _matcher; |
| private String _attributeName; |
| private String _pattern; |
| private String _errorKey; |
| |
| public ValidateRule(RegexpMatcher matcher, String attributeName, String pattern, String errorKey) |
| { |
| _matcher = matcher; |
| _attributeName = attributeName; |
| _pattern = pattern; |
| _errorKey = errorKey; |
| } |
| |
| /** |
| * Validates that the attribute, if provided, matches the pattern. |
| * |
| * @throws InvalidStringException if the value does not match the pattern. |
| * |
| **/ |
| |
| public void begin(String namespace, String name, Attributes attributes) throws Exception |
| { |
| String value = getValue(attributes, _attributeName); |
| if (value == null) |
| return; |
| |
| if (_matcher.matches(_pattern, value)) |
| return; |
| |
| throw new InvalidStringException( |
| Tapestry.format(_errorKey, value), |
| value, |
| getResourceLocation()); |
| } |
| |
| } |