/*
* Copyright 2011-2013 HTTL Team.
*
* 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 httl.spi.resolvers;
import httl.Context;
import httl.Template;
import httl.spi.Resolver;
/**
* ContextResolver. (SPI, Singleton, ThreadSafe)
*
* @author Liang Fei (liangfei0201 AT gmail DOT com)
*/
public class ContextResolver implements Resolver {
public Object get(String key) {
if ("parent".equals(key)) {
return Context.getContext().getParent();
} else if ("super".equals(key)) {
Context parent = Context.getContext().getParent();
return parent == null ? null : parent.getTemplate();
} else if ("this".equals(key)) {
return Context.getContext().getTemplate();
} else if ("engine".equals(key)) {
return Context.getContext().getEngine();
} else if ("out".equals(key)) {
return Context.getContext().getOut();
} else if ("level".equals(key)) {
return Context.getContext().getLevel();
} else {
Template template = Context.getContext().getTemplate();
if (template != null) {
return template.getMacros().get(key);
}
return null;
}
}
}