| // 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.ILocation; |
| import org.apache.tapestry.Tapestry; |
| |
| /** |
| * A conditional portion of the generated script. |
| * |
| * @author Howard Lewis Ship |
| * @version $Id$ |
| * @since 1.0.1 |
| * |
| **/ |
| |
| class IfToken extends AbstractToken |
| { |
| private boolean _condition; |
| private String _expression; |
| |
| IfToken(boolean condition, String expression, ILocation location) |
| { |
| super(location); |
| |
| _condition = condition; |
| _expression = expression; |
| } |
| |
| private boolean evaluate(ScriptSession session) |
| { |
| Object value = evaluate(_expression, session); |
| |
| return Tapestry.evaluateBoolean(value); |
| } |
| |
| public void write(StringBuffer buffer, ScriptSession session) |
| { |
| if (evaluate(session) == _condition) |
| writeChildren(buffer, session); |
| } |
| } |