org.snaker.engine.model.CustomModel Maven / Gradle / Ivy
/* Copyright 2013-2014 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.model;
import java.lang.reflect.Method;
import java.util.Map;
import org.snaker.engine.SnakerException;
import org.snaker.engine.core.Execution;
import org.snaker.engine.handlers.IHandler;
import org.snaker.engine.helper.ClassHelper;
import org.snaker.engine.helper.ReflectHelper;
import org.snaker.engine.helper.StringHelper;
/**
* 自定义模型
* @author yuqs
* @version 1.0
*/
public class CustomModel extends WorkModel {
/**
*
*/
private static final long serialVersionUID = 8796192915721758769L;
/**
* 需要执行的class类路径
*/
private String clazz;
/**
* 需要执行的class对象的方法名称
*/
private String methodName;
/**
* 执行方法时传递的参数表达式变量名称
*/
private String args;
/**
* 执行的返回值变量
*/
private String var;
/**
* 加载模型时初始化的对象实例
*/
private Object invokeObject;
public void exec(Execution execution) {
if(invokeObject == null) {
invokeObject = ClassHelper.newInstance(clazz);
}
if(invokeObject == null) {
throw new SnakerException("自定义模型[class=" + clazz + "]实例化对象失败");
}
if(invokeObject instanceof IHandler) {
IHandler handler = (IHandler)invokeObject;
handler.handle(execution);
} else {
Method method = ReflectHelper.findMethod(invokeObject.getClass(), methodName);
if(method == null) {
throw new SnakerException("自定义模型[class=" + clazz + "]无法找到方法名称:" + methodName);
}
Object[] objects = getArgs(execution.getArgs(), args);
Object returnValue = ReflectHelper.invoke(method, invokeObject, objects);
if(StringHelper.isNotEmpty(var)) {
execution.getArgs().put(var, returnValue);
}
}
runOutTransition(execution);
}
/**
* 根据传递的执行参数、模型的参数列表返回实际的参数对象数组
* @param execArgs
* @param args
* @return
*/
private Object[] getArgs(Map execArgs, String args) {
Object[] objects = null;
if(StringHelper.isNotEmpty(args)) {
String[] argArray = args.split(",");
objects = new Object[argArray.length];
for(int i = 0; i < argArray.length; i++) {
objects[i] = execArgs.get(argArray[i]);
}
}
return objects;
}
public String getClazz() {
return clazz;
}
public void setClazz(String clazz) {
this.clazz = clazz;
}
public String getMethodName() {
return methodName;
}
public void setMethodName(String methodName) {
this.methodName = methodName;
}
public String getArgs() {
return args;
}
public void setArgs(String args) {
this.args = args;
}
public String getVar() {
return var;
}
public void setVar(String var) {
this.var = var;
}
}