ByteBuddy子类构造函数

时间:2016-06-02 16:19:25

标签: java subclass byte-buddy

我试图在bytebuddy中创建一个抽象类的子类,并希望用我自己的函数覆盖构造函数。我无法使用defineConstructor。

超类:

public abstract class AbstractDMTable {
protected HashMap<String, DMEntry<?>> parameterMap;

public DMEntry<?> getParameter(String paramName) {
    if (parameterMap.containsKey(paramName))
        return parameterMap.get(paramName);
    return null;
}...

子类:

public class DMTable_DEBUGOUT extends AbstractDMTable {
/**
 * Table entry
 * prints the value of the specified parameter
 */
public DMEntry<DMEntry<?>> DEBUG_PARAM;

/**
 * Table entry
 * execution interval of the step handler (s)
 */
public DMEntry<Double> EXEC_INTERVAL;

/**
 * Table entry
 * active / not active status of this subsystem
 */
public DMEntry<Boolean> IS_ACTIVE;

/**
 * Standard constructor. Creates a new table and initializes all entry fields with all entry values set to {@code null}
 */
public DMTable_DEBUGOUT() {
    super();
    DEBUG_PARAM = new DMEntry<>();
    parameterMap.put("DEBUG_PARAM", DEBUG_PARAM);
    EXEC_INTERVAL = new DMEntry<>();
    parameterMap.put("EXEC_INTERVAL", EXEC_INTERVAL);
    IS_ACTIVE = new DMEntry<>();
    parameterMap.put("IS_ACTIVE", IS_ACTIVE);
}
}

My ByteBuddy:

    DynamicType.Builder<? extends AbstractDMTable> subsystem = new ByteBuddy().subclass(AbstractDMTable.class)
            .name("DMTable_" + name).defineConstructor(Collections.<Class<AbstractDMTable>> emptyList(), Visibility.PUBLIC);
    for (Entry<String, Pair<String, String>> p : t.getValue().entrySet()) {
        subsystem.defineField(p.getKey(), this.createSubSystemEntry(p).getClass(), Visibility.PUBLIC);
    }
    // subsystem.defineConstructor(Arrays.<Class<AbstractDMTable>>
    // asList(int.class), Visibility.PUBLIC);
    return subsystem.make().load(getClass().getClassLoader(), ClassLoadingStrategy.Default.WRAPPER).getLoaded();

错误:

defineConstructor(ModifierContributor.ForMethod...) in the type
DynamicType.Builder<AbstractDMTable> is not applicable for the
arguments (List<Class<?>>, Visibility)  DynamicDatabaseGenerator.java
line 66 Java Problem

1 个答案:

答案 0 :(得分:1)

您正在使用模仿超类构造函数的默认构造函数策略。通过使用不模仿超类的不同构造函数策略来重载子类方法以避免此重复定义。

此外,您应该更新Byte Buddy,这样您就可以获得更好的错误消息。