net.hasor.dataql.runtime.inset.GET 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.ObjectModel;
import net.hasor.dataql.domain.ValueModel;
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.utils.BeanUtils;
import java.util.Map;
/**
* GET // 获取栈顶对象元素的属性（例：GET,"xxxx"）
* - 参数说明：共1参数；参数1：属性名称（Map的Key 或 对象的属性名）
* - 栈行为：消费1，产出1
* - 堆行为：无
*
* @author 赵永春 ([email protected])
* @version : 2017-07-19
*/
class GET implements InsetProcess {
@Override
public int getOpcode() {
return GET;
}
@Override
public void doWork(InstSequence sequence, DataHeap dataHeap, DataStack dataStack, EnvStack envStack, InsetProcessContext context) {
String nodeName = null;
if (sequence.currentInst().getArrays().length > 0) {
nodeName = sequence.currentInst().getString(0);
} else {
Object nodeNameData = dataStack.pop();
if (nodeNameData instanceof ValueModel) {
nodeName = ((ValueModel) nodeNameData).asString();
} else {
nodeName = (String) nodeNameData;
}
}
Object useData = dataStack.pop();
useData = readProperty(useData, nodeName);
dataStack.push(useData);
}
private static Object readProperty(Object object, String fieldName) {
if (object == null) {
return null;
}
if (object instanceof ObjectModel) {
return ((ObjectModel) object).asOri().get(fieldName);
}
if (object instanceof Map) {
return ((Map) object).get(fieldName);
}
//
return BeanUtils.readPropertyOrField(object, fieldName);
}
}