/*
* Copyright 2013 eXo Platform SAS
*
* 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 juzu.impl.tags;
import juzu.impl.template.spi.TemplateStub;
import juzu.io.UndeclaredIOException;
import juzu.template.Renderable;
import juzu.template.TagHandler;
import juzu.template.TemplateExecutionException;
import juzu.template.TemplateRenderContext;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.util.Collections;
import java.util.Map;
/** @author Julien Viet */
public class SimpleTag extends TagHandler {
/** . */
private final String className;
/** . */
private final TemplateStub stub;
// Compile time
public SimpleTag(String name, String className) {
super(name);
//
this.className = className;
this.stub = null;
}
// Runtime
public SimpleTag(String name, Class<? extends TemplateStub> stubType) {
super(name);
// Init stub
TemplateStub stub;
try {
Constructor ctor = stubType.getConstructor(ClassLoader.class, String.class);
stub = (TemplateStub)ctor.newInstance(getClass().getClassLoader(), getClass().getName());
}
catch (Exception e) {
throw new UnsupportedOperationException("Handle me gracefully", e);
}
//
this.className = getClass().getName();
this.stub = stub;
}
@Override
public String getClassName() {
return className;
}
@Override
public void render(final TemplateRenderContext context, final Renderable body, Map<String, String> args) throws IOException {
stub.init();
final Object _parameters = context.setAttribute("parameters", args != null ? args : Collections.emptyMap());
Renderable wrappedBody = new Renderable() {
public void render(TemplateRenderContext context) throws TemplateExecutionException, UndeclaredIOException {
Object prev = context.setAttribute("parameters", _parameters);
try {
body.render(context);
}
finally {
context.setAttribute("parameters", prev);
}
}
};
InsertTag.current.get().addLast(wrappedBody);
try {
stub.render(context);
}
finally {
InsertTag.current.get().removeLast();
context.setAttribute("parameters", _parameters);
}
}
}