net.hasor.dataql.runtime.inset.CALL 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.compiler.qil.Instruction;
import net.hasor.dataql.runtime.*;
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.RefCall;
/**
* CALL // 发起服务调用（例：CALL,2）
* - 参数说明：共1参数；参数1：发起调用时需要用到的调用参数个数 n
* - 栈行为：消费：n + 1（n是参数，1是函数入口），产出1
* - 堆行为：无
*
* @author 赵永春 ([email protected])
* @version : 2017-07-19
*/
class CALL implements InsetProcess {
@Override
public int getOpcode() {
return CALL;
}
@Override
public void doWork(InstSequence sequence, DataHeap dataHeap, DataStack dataStack, EnvStack envStack, InsetProcessContext context) throws QueryRuntimeException {
Instruction instruction = sequence.currentInst();
int paramCount = instruction.getInt(0);
//
Object[] paramArrays = new Object[paramCount];
for (int i = 0; i < paramCount; i++) {
int paramIndex = paramCount - 1 - i;
Object paramObj = dataStack.pop();
paramArrays[paramIndex] = paramObj;
}
//
Object refCallObj = dataStack.pop();
if (!(refCallObj instanceof RefCall)) {
throw new QueryRuntimeException(sequence.programLocation(), "target is not RefCall.");
}
//
RefCall refCall = (RefCall) refCallObj;
Object result = refCall.invokeMethod(paramArrays, new HintsReadOnly(context.currentHints()), context.getFinder());
dataStack.push(result);
}
}