com.whaleal.icefrog.extra.expression.engine.rhino.RhinoEngine Maven / Gradle / Ivy
package com.whaleal.icefrog.extra.expression.engine.rhino;
import com.whaleal.icefrog.core.map.MapUtil;
import com.whaleal.icefrog.extra.expression.ExpressionEngine;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.ScriptableObject;
import java.util.Map;
/**
* rhino引擎封装
* 见：https://github.com/mozilla/rhino
*
* @author Looly
* @author wh
* @since 1.0.0
*/
public class RhinoEngine implements ExpressionEngine {
@Override
public Object eval(String expression, Map context) {
final Context ctx = Context.enter();
final Scriptable scope = ctx.initStandardObjects();
if (MapUtil.isNotEmpty(context)) {
context.forEach((key, value)->{
// 将java对象转为js对象后放置于JS的作用域中
ScriptableObject.putProperty(scope, key, Context.javaToJS(value, scope));
});
}
final Object result = ctx.evaluateString(scope, expression, "rhino.js", 1, null);
Context.exit();
return result;
}
}