net.hasor.dataql.runtime.inset.PUSH 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.ListModel;
import net.hasor.dataql.runtime.InsetProcess;
import net.hasor.dataql.runtime.InsetProcessContext;
import net.hasor.dataql.runtime.InstSequence;
import net.hasor.dataql.runtime.QueryRuntimeException;
import net.hasor.dataql.runtime.mem.DataHeap;
import net.hasor.dataql.runtime.mem.DataStack;
import net.hasor.dataql.runtime.mem.EnvStack;
/**
* PUSH // 将栈顶元素压入集合（例：PUSH）
* - 参数说明：共0参数；
* - 栈行为：消费1，产出0
* - 堆行为：无
*
* @author 赵永春 ([email protected])
* @version : 2017-07-19
*/
class PUSH implements InsetProcess {
@Override
public int getOpcode() {
return PUSH;
}
@Override
public void doWork(InstSequence sequence, DataHeap dataHeap, DataStack dataStack, EnvStack envStack, InsetProcessContext context) throws QueryRuntimeException {
Object data = dataStack.pop();
Object ors = dataStack.peek();
//
if (ors instanceof ListModel) {
((ListModel) ors).add(data);
return;
}
throw new QueryRuntimeException(sequence.programLocation(), "output data error, target type must be ListModel.");
}
}