net.hasor.dataql.runtime.inset.IF 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.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;
/**
* IF // if 条件判断，如果条件判断失败那么 GOTO 到指定位置，否则继续往下执行
* - 参数说明：共1参数；参数1：GOTO 的位置
* - 栈行为：消费1，产出0
* - 堆行为：无
*
* @author 赵永春 ([email protected])
* @version : 2017-07-19
*/
class IF implements InsetProcess {
@Override
public int getOpcode() {
return IF;
}
@Override
public void doWork(InstSequence sequence, DataHeap dataHeap, DataStack dataStack, EnvStack envStack, InsetProcessContext context) {
Object test = dataStack.pop();
if (test instanceof ValueModel) {
test = ((ValueModel) test).asOri();
}
//
int jumpLabel = sequence.currentInst().getInt(0);
//
boolean testFailed = (test == null || Boolean.FALSE.equals(test));
if (!testFailed) {
String testStr = test.toString();
testFailed = ("false".equalsIgnoreCase(testStr) || "off".equalsIgnoreCase(testStr) || "0".equalsIgnoreCase(testStr));
}
//
if (testFailed) {
sequence.jumpTo(jumpLabel);
}
}
}