| // 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.ApplicationRuntimeException; |
| import org.apache.tapestry.ILocation; |
| import org.apache.tapestry.Tapestry; |
| |
| /** |
| * A token that validates that an input symbol exists or is of a |
| * declared type. |
| * |
| * |
| * @author Howard Lewis Ship |
| * @version $Id$ |
| * @since 2.2 |
| * |
| **/ |
| |
| class InputSymbolToken extends AbstractToken |
| { |
| private String _key; |
| private Class _class; |
| private boolean _required; |
| |
| InputSymbolToken(String key, Class clazz, boolean required, ILocation location) |
| { |
| super(location); |
| |
| _key = key; |
| _class = clazz; |
| _required = required; |
| } |
| |
| public void write(StringBuffer buffer, ScriptSession session) |
| { |
| Object value = session.getSymbols().get(_key); |
| |
| if (_required && value == null) |
| throw new ApplicationRuntimeException( |
| Tapestry.format("InputSymbolToken.required", _key), |
| getLocation(), |
| null); |
| |
| if (value != null && _class != null && !_class.isAssignableFrom(value.getClass())) |
| throw new ApplicationRuntimeException( |
| Tapestry.format( |
| "InputSymbolToken.wrong-type", |
| _key, |
| value.getClass().getName(), |
| _class.getName()), |
| getLocation(), |
| null); |
| } |
| |
| } |