| /* |
| * Copyright 1999-2004 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.cocoon.components.variables; |
| |
| import org.apache.cocoon.sitemap.PatternException; |
| |
| /** |
| * This factory component creates a {@link VariableResolver} for an expression. |
| * A {@link VariableResolver} can then be used at runtime to resolve |
| * a variable with the current value. |
| * A variable can contain dynamic parts that are contained in {...}, |
| * |
| * NOTE: This interface is work in progress, so chances are that it will |
| * change. |
| * |
| * @author <a href="mailto:cziegeler@apache.org">Carsten Ziegeler</a> |
| * |
| * @version CVS $Id: VariableResolverFactory.java,v 1.2 2004/03/05 13:02:07 bdelacretaz Exp $ |
| */ |
| public interface VariableResolverFactory { |
| |
| String ROLE = VariableResolverFactory.class.getName(); |
| |
| /** |
| * Get a resolver for a given expression. Chooses the most efficient implementation |
| * depending on <code>expression</code>. |
| * Don't forget to release the resolver |
| */ |
| VariableResolver lookup(String expression) |
| throws PatternException; |
| |
| void release(VariableResolver resolver); |
| } |
| |
| |