| // 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.xml.DocumentParseException; |
| import org.xml.sax.Attributes; |
| |
| /** |
| * Sets a property from an extended attribute. An extended attribute |
| * is a value that may either be specified inside an XML attribute or, |
| * if the attribute is not present, in the body of the element. |
| * It is not allowed that the value be specified in both places. |
| * The value may be optional or required. |
| * |
| * @author Howard Lewis Ship |
| * @version $Id$ |
| * @since 3.0 |
| * |
| **/ |
| |
| public class SetExtendedPropertyRule extends AbstractSpecificationRule |
| { |
| private String _attributeName; |
| private String _propertyName; |
| private boolean _required; |
| |
| private boolean _valueSet; |
| |
| public SetExtendedPropertyRule(String attributeName, String propertyName, boolean required) |
| { |
| _attributeName = attributeName; |
| _propertyName = propertyName; |
| _required = required; |
| } |
| |
| public void begin(String namespace, String name, Attributes attributes) throws Exception |
| { |
| String value = getValue(attributes, _attributeName); |
| |
| if (value != null) |
| { |
| setProperty(_propertyName, value); |
| _valueSet = true; |
| } |
| } |
| |
| public void body(String namespace, String name, String text) throws Exception |
| { |
| if (Tapestry.isBlank(text)) |
| return; |
| |
| if (_valueSet) |
| { |
| throw new DocumentParseException( |
| Tapestry.format( |
| "SpecificationParser.no-attribute-and-body", |
| _attributeName, |
| name), |
| getResourceLocation()); |
| } |
| |
| setProperty(_propertyName, text.trim()); |
| _valueSet = true; |
| } |
| |
| public void end(String namespace, String name) throws Exception |
| { |
| if (!_valueSet && _required) |
| throw new DocumentParseException( |
| Tapestry.format( |
| "SpecificationParser.required-extended-attribute", |
| name, |
| _attributeName), |
| getResourceLocation()); |
| |
| _valueSet = false; |
| } |
| |
| } |