net.hasor.dataql.runtime.inset.HINT 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;
/**
* HINT // 设置 Hint，影响执行引擎的参数选项。
* - 参数说明：共2参数；参数1：选项Key；参数2：选项Value
* - 栈行为：消费2，产出0
* - 堆行为：无
*
* @author 赵永春 ([email protected])
* @version : 2017-07-19
*/
class HINT implements InsetProcess {
@Override
public int getOpcode() {
return HINT;
}
@Override
public void doWork(InstSequence sequence, DataHeap dataHeap, DataStack dataStack, EnvStack envStack, InsetProcessContext context) {
Object value = dataStack.pop();
String key = (String) dataStack.pop();
//
if (value == null) {
context.currentHints().removeHint(key);
} else if (value instanceof Boolean) {
context.currentHints().setHint(key, (Boolean) value);
} else if (value instanceof Number) {
context.currentHints().setHint(key, (Number) value);
} else {
context.currentHints().setHint(key, value.toString());
}
}
}