| // 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.script; |
| |
| import org.apache.tapestry.IResourceResolver; |
| import org.apache.tapestry.Tapestry; |
| import org.apache.tapestry.util.xml.BaseRule; |
| import org.apache.tapestry.util.xml.DocumentParseException; |
| import org.apache.tapestry.util.xml.RuleDirectedParser; |
| import org.xml.sax.Attributes; |
| |
| /** |
| * Constructs an {@link org.apache.tapestry.script.InputSymbolToken} |
| * from an <input-symbol> element. |
| * |
| * @author Howard Lewis Ship |
| * @version $Id$ |
| * @since 3.0 |
| */ |
| class InputSymbolRule extends BaseRule |
| { |
| private IResourceResolver _resolver; |
| |
| public InputSymbolRule(IResourceResolver resolver) |
| { |
| _resolver = resolver; |
| } |
| |
| public void startElement(RuleDirectedParser parser, Attributes attributes) |
| { |
| String key = getAttribute(attributes, "key"); |
| |
| parser.validate(key, Tapestry.SIMPLE_PROPERTY_NAME_PATTERN, "ScriptParser.invalid-key"); |
| |
| String className = getAttribute(attributes, "class"); |
| Class expectedClass = lookupClass(parser, className); |
| |
| String required = getAttribute(attributes, "required"); |
| |
| InputSymbolToken token = |
| new InputSymbolToken(key, expectedClass, required.equals("yes"), parser.getLocation()); |
| |
| IScriptToken parent = (IScriptToken) parser.peek(); |
| parent.addToken(token); |
| } |
| |
| private Class lookupClass(RuleDirectedParser parser, String className) |
| { |
| if (Tapestry.isBlank(className)) |
| return null; |
| |
| try |
| { |
| return _resolver.findClass(className); |
| } |
| catch (Exception ex) |
| { |
| throw new DocumentParseException( |
| Tapestry.format("ScriptParser.unable-to-resolve-class", className), |
| parser.getDocumentLocation(), |
| parser.getLocation(), |
| ex); |
| } |
| } |
| } |