net.hasor.dataql.runtime.inset.EXIT Maven / Gradle / Ivy
/*
* Copyright 2008-2009 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 net.hasor.dataql.runtime.inset;
import net.hasor.dataql.domain.DomainHelper;
import net.hasor.dataql.runtime.InsetProcess;
import net.hasor.dataql.runtime.InsetProcessContext;
import net.hasor.dataql.runtime.InstSequence;
import net.hasor.dataql.runtime.mem.DataHeap;
import net.hasor.dataql.runtime.mem.DataStack;
import net.hasor.dataql.runtime.mem.EnvStack;
import net.hasor.dataql.runtime.mem.ExitType;
/**
* EXIT // 结束所有指令序列的执行并返回数据和状态
* - 参数说明：共1参数；参数1：退出码
* - 栈行为：消费1，产出0
* - 堆行为：无
* 提示：区别于 RETURN 指令的是，EXIT 指令将会终结整个查询的执行。
* 而 RETURN 指令只会终止当前指令序列的执行。同时有别于 THROW 指令的是，EXIT 执行不会得到异常抛出。
* @see net.hasor.dataql.runtime.inset.THROW
* @see net.hasor.dataql.runtime.inset.EXIT
* @author 赵永春 ([email protected])
* @version : 2017-07-19
*/
class EXIT implements InsetProcess {
@Override
public int getOpcode() {
return EXIT;
}
@Override
public void doWork(InstSequence sequence, DataHeap dataHeap, DataStack dataStack, EnvStack envStack, InsetProcessContext context) {
int resultCode = sequence.currentInst().getInt(0);
Object result = dataStack.pop();
dataStack.setResultCode(resultCode);
dataStack.setResult(DomainHelper.convertTo(result));
dataStack.setExitType(ExitType.Exit);
sequence.jumpTo(sequence.exitPosition());
}
}