org.snaker.engine.parser.AbstractNodeParser Maven / Gradle / Ivy
/* Copyright 2012-2013 the original author or authors.
*
* 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.snaker.engine.parser;
import java.util.List;
import org.snaker.engine.helper.XmlHelper;
import org.snaker.engine.model.NodeModel;
import org.snaker.engine.model.TransitionModel;
import org.w3c.dom.Element;
/**
* 抽象dom节点解析类
* 完成通用的属性、变迁解析
* @author yuqs
* @version 1.0
*/
public abstract class AbstractNodeParser implements NodeParser {
/**
* 模型对象
*/
protected NodeModel model;
/**
* 实现NodeParser接口的parse函数
* 由子类产生各自的模型对象，设置常用的名称属性，并且解析子节点transition，构造TransitionModel模型对象
*/
public void parse(Element element) {
model = newModel();
model.setName(element.getAttribute(ATTR_NAME));
model.setDisplayName(element.getAttribute(ATTR_DISPLAYNAME));
model.setLayout(element.getAttribute(ATTR_LAYOUT));
model.setPreInterceptors(element.getAttribute(ATTR_PREINTERCEPTORS));
model.setPostInterceptors(element.getAttribute(ATTR_POSTINTERCEPTORS));
List transitions = XmlHelper.elements(element, NODE_TRANSITION);
for(Element te : transitions) {
TransitionModel transition = new TransitionModel();
transition.setName(te.getAttribute(ATTR_NAME));
transition.setDisplayName(te.getAttribute(ATTR_DISPLAYNAME));
transition.setTo(te.getAttribute(ATTR_TO));
transition.setExpr(te.getAttribute(ATTR_EXPR));
transition.setG(te.getAttribute(ATTR_G));
transition.setOffset(te.getAttribute(ATTR_OFFSET));
transition.setSource(model);
model.getOutputs().add(transition);
}
parseNode(model, element);
}
/**
* 子类可覆盖此方法，完成特定的解析
* @param model
* @param element
*/
protected void parseNode(NodeModel model, Element element) {
}
/**
* 抽象方法，由子类产生各自的模型对象
* @return
*/
protected abstract NodeModel newModel();
/**
* 返回模型对象
*/
public NodeModel getModel() {
return model;
}
}