net.hasor.dataql.runtime.inset.LOAD 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.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 java.util.function.Supplier;
/**
* LOAD // 从指定深度的堆中加载n号元素到栈（例：LOAD 1 ,1 ）
* - 参数说明：共2参数；参数1：堆深度；参数2：元素序号；
* - 栈行为：消费0，产出1
* - 堆行为：取出数据（不删除）
*
* @see net.hasor.dataql.runtime.inset.STORE
* @author 赵永春 ([email protected])
* @version : 2017-07-19
*/
class LOAD implements InsetProcess {
@Override
public int getOpcode() {
return LOAD;
}
@Override
public void doWork(InstSequence sequence, DataHeap dataHeap, DataStack dataStack, EnvStack envStack, InsetProcessContext context) {
int depth = sequence.currentInst().getInt(0);
int index = sequence.currentInst().getInt(1);
Object data = dataHeap.loadData(depth, index);
if (data instanceof Supplier) {
data = ((Supplier) data).get();
}
dataStack.push(data);
}
}