我正在使用 Janino 评估脚本,但我不知道如何表示脚本中的值列表
<!-- https://mvnrepository.com/artifact/org.codehaus.janino/janino -->
<dependency>
<groupId>org.codehaus.janino</groupId>
<artifactId>janino</artifactId>
<version>3.1.0</version>
</dependency>
我需要评估 containsAll 脚本,例如:attributeA.containsAll([3,5])
我尝试过使用 [] 和 Arrays.asList,但编译器要么说:“org.codehaus.commons.compiler.CompileException:第 1 行,第 25 列:意外的令牌“[”在主目录中”,要么说:org.codehaus。 commons.compiler.CompileException:第 1 行,第 32 列:未知变量或类型“数组”
import com.my.project.MyCollection;
import org.codehaus.commons.compiler.CompileException;
import org.codehaus.janino.ExpressionEvaluator;
private static void evalExpression(Map<String, MyCollection> fields)
{
String script= "attributeA.containsAll([3,5])";
try {
ExpressionEvaluator ee = new ExpressionEvaluator();
Class[] parameterTypes = new Class[fields.size()];
String[] parameterNames = new String[fields.size()];
Object[] arguments = new Object[fields.size()];
int i = 0;
for (Map.Entry<String, MyCollection> field : fields.entrySet()) {
String fieldName = field.getKey();
MyCollection fieldValues = field.getValue();
parameterNames[i] = fieldName;
parameterTypes[i] = MyCollection.class;
arguments[i]=fieldValues;
i++;
}
ee.setParameters(parameterNames, parameterTypes);
ee.setExpressionType(Boolean.class);
// And now we "cook" (scan, parse, compile and load) the fabulous expression.
ee.cook(script);
// Eventually we evaluate the expression - and that goes super-fast.
Boolean result = (Boolean) ee.evaluate(arguments);
System.out.println(result);
}
catch (Exception ex){
System.out.println(ex.getMessage());
}
}
我希望输出为 false/true,但会抛出 org.codehaus.commons.compiler.CompileException