Java MethodAccessor类代码示例

import sun.reflect.MethodAccessor; //导入依赖的package包/类
private MethodAccessor acquireMethodAccessor() {
    // First check to see if one has been created yet, and take it
    // if so
    MethodAccessor tmp = null;
    if (root != null) tmp = root.getMethodAccessor();
    if (tmp != null) {
        methodAccessor = tmp;
    } else {
        // Otherwise fabricate one and propagate it up to the root
        tmp = reflectionFactory.newMethodAccessor(this);
        setMethodAccessor(tmp);
    }

    return tmp;
}
 

import sun.reflect.MethodAccessor; //导入依赖的package包/类
void setMethodAccessor(MethodAccessor accessor) {
    methodAccessor = accessor;
    // Propagate up
    if (root != null) {
        root.setMethodAccessor(accessor);
    }
}
 

import sun.reflect.MethodAccessor; //导入依赖的package包/类
private void acquireMethodAccessor() {
    // First check to see if one has been created yet, and take it
    // if so
    MethodAccessor tmp = null;
    if (root != null) tmp = root.getMethodAccessor();
    if (tmp != null) {
        methodAccessor = tmp;
        return;
    }
    // Otherwise fabricate one and propagate it up to the root
    tmp = reflectionFactory.newMethodAccessor(this);
    setMethodAccessor(tmp);
}
 

import sun.reflect.MethodAccessor; //导入依赖的package包/类
/**
 * Invokes the underlying method represented by this {@code Method}
 * object, on the specified object with the specified parameters.
 * Individual parameters are automatically unwrapped to match
 * primitive formal parameters, and both primitive and reference
 * parameters are subject to method invocation conversions as
 * necessary.
 *
 * <p>If the underlying method is static, then the specified {@code obj}
 * argument is ignored. It may be null.
 *
 * <p>If the number of formal parameters required by the underlying method is
 * 0, the supplied {@code args} array may be of length 0 or null.
 *
 * <p>If the underlying method is an instance method, it is invoked
 * using dynamic method lookup as documented in The Java Language
 * Specification, Second Edition, section 15.12.4.4; in particular,
 * overriding based on the runtime type of the target object will occur.
 *
 * <p>If the underlying method is static, the class that declared
 * the method is initialized if it has not already been initialized.
 *
 * <p>If the method completes normally, the value it returns is
 * returned to the caller of invoke; if the value has a primitive
 * type, it is first appropriately wrapped in an object. However,
 * if the value has the type of an array of a primitive type, the
 * elements of the array are <i>not</i> wrapped in objects; in
 * other words, an array of primitive type is returned.  If the
 * underlying method return type is void, the invocation returns
 * null.
 *
 * @param obj  the object the underlying method is invoked from
 * @param args the arguments used for the method call
 * @return the result of dispatching the method represented by
 * this object on {@code obj} with parameters
 * {@code args}
 *
 * @exception IllegalAccessException    if this {@code Method} object
 *              is enforcing Java language access control and the underlying
 *              method is inaccessible.
 * @exception IllegalArgumentException  if the method is an
 *              instance method and the specified object argument
 *              is not an instance of the class or interface
 *              declaring the underlying method (or of a subclass
 *              or implementor thereof); if the number of actual
 *              and formal parameters differ; if an unwrapping
 *              conversion for primitive arguments fails; or if,
 *              after possible unwrapping, a parameter value
 *              cannot be converted to the corresponding formal
 *              parameter type by a method invocation conversion.
 * @exception InvocationTargetException if the underlying method
 *              throws an exception.
 * @exception NullPointerException      if the specified object is null
 *              and the method is an instance method.
 * @exception ExceptionInInitializerError if the initialization
 * provoked by this method fails.
 */
@CallerSensitive
public Object invoke(Object obj, Object... args)
    throws IllegalAccessException, IllegalArgumentException,
       InvocationTargetException
{
    if (!override) {
        if (!Reflection.quickCheckMemberAccess(clazz, modifiers)) {
            Class<?> caller = Reflection.getCallerClass();
            checkAccess(caller, clazz, obj, modifiers);
        }
    }
    MethodAccessor ma = methodAccessor;             // read volatile
    if (ma == null) {
        ma = acquireMethodAccessor();
    }
    return ma.invoke(obj, args);
}
 

import sun.reflect.MethodAccessor; //导入依赖的package包/类
MethodAccessor getMethodAccessor() {
    return methodAccessor;
}
 

import sun.reflect.MethodAccessor; //导入依赖的package包/类
public MethodAccessor getMethodAccessor(Method m) {
    return m.getMethodAccessor();
}
 

import sun.reflect.MethodAccessor; //导入依赖的package包/类
public void setMethodAccessor(Method m, MethodAccessor accessor) {
    m.setMethodAccessor(accessor);
}
 

import sun.reflect.MethodAccessor; //导入依赖的package包/类
/**
 * Invokes the underlying method represented by this {@code Method}
 * object, on the specified object with the specified parameters.
 * Individual parameters are automatically unwrapped to match
 * primitive formal parameters, and both primitive and reference
 * parameters are subject to method invocation conversions as
 * necessary.
 *
 * <p>If the underlying method is static, then the specified {@code obj}
 * argument is ignored. It may be null.
 *
 * <p>If the number of formal parameters required by the underlying method is
 * 0, the supplied {@code args} array may be of length 0 or null.
 *
 * <p>If the underlying method is an instance method, it is invoked
 * using dynamic method lookup as documented in The Java Language
 * Specification, Second Edition, section 15.12.4.4; in particular,
 * overriding based on the runtime type of the target object will occur.
 *
 * <p>If the underlying method is static, the class that declared
 * the method is initialized if it has not already been initialized.
 *
 * <p>If the method completes normally, the value it returns is
 * returned to the caller of invoke; if the value has a primitive
 * type, it is first appropriately wrapped in an object. However,
 * if the value has the type of an array of a primitive type, the
 * elements of the array are <i>not</i> wrapped in objects; in
 * other words, an array of primitive type is returned.  If the
 * underlying method return type is void, the invocation returns
 * null.
 *
 * @param obj  the object the underlying method is invoked from
 * @param args the arguments used for the method call
 * @return the result of dispatching the method represented by
 * this object on {@code obj} with parameters
 * {@code args}
 *
 * @exception IllegalAccessException    if this {@code Method} object
 *              is enforcing Java language access control and the underlying
 *              method is inaccessible.
 * @exception IllegalArgumentException  if the method is an
 *              instance method and the specified object argument
 *              is not an instance of the class or interface
 *              declaring the underlying method (or of a subclass
 *              or implementor thereof); if the number of actual
 *              and formal parameters differ; if an unwrapping
 *              conversion for primitive arguments fails; or if,
 *              after possible unwrapping, a parameter value
 *              cannot be converted to the corresponding formal
 *              parameter type by a method invocation conversion.
 * @exception InvocationTargetException if the underlying method
 *              throws an exception.
 * @exception NullPointerException      if the specified object is null
 *              and the method is an instance method.
 * @exception ExceptionInInitializerError if the initialization
 * provoked by this method fails.
 */
@CallerSensitive
public Object invoke(Object obj, Object... args)
    throws IllegalAccessException, IllegalArgumentException,
       InvocationTargetException
{
    if (!override) {
        if (!Reflection.quickCheckMemberAccess(clazz, modifiers)) {
            Class<?> caller = Reflection.getCallerClass();
            checkAccess(caller, clazz, obj, modifiers);
        }
    }
    MethodAccessor ma = methodAccessor;             // read volatile
    if (ma == null) {
        ma = acquireMethodAccessor();
    }
    return ma.invoke(obj, args, ikvm.internal.CallerID.getCallerID());
}